Method, device and equipment for determining Charpy impact energy index

Abstract

The present invention provides a method, device, and apparatus for determining a Charpy impact energy index. The method comprises: obtaining a first fracture toughness of a sample in a first environment; determining a first Charpy impact energy index of the sample in the first environment based on the first fracture toughness; determining a second fracture toughness of the sample in a second environment based on the first Charpy impact energy index; determining a sensitive state of the sample in the second environment based on the first fracture toughness and the second fracture toughness; and determining a target Charpy impact energy index of the sample in the second environment based on the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness. This method improves the safety of oil pipes in use.

Description

Technical Field

[0001] The present application relates to the technical field of petroleum drilling and production engineering, and in particular to a method, device and equipment for determining a Charpy impact energy index. Background Art

[0002] Charpy impact energy is one of the important mechanical properties of oil pipes. Accurately formulating the Charpy impact energy index of oil pipes can effectively improve the safety of oil pipes during use.

[0003] Currently, the Charpy impact energy index for OCTG can be determined based on its yield strength and wall thickness. For example, the minimum impact energy that OCTG can withstand in the transverse direction is set to be greater than 10% of its yield strength. However, in practice, OCTG is susceptible to damage due to environmental factors such as corrosion. Therefore, it is difficult to determine an effective Charpy impact energy index based on yield strength and wall thickness, resulting in lower safety for OCTG use. Summary of the Invention

[0004] The present application provides a method, device and equipment for determining the Charpy impact energy index, which is used to solve the technical problem in the prior art that the Charpy impact energy index is inaccurately formulated, resulting in low safety in the use of oil pipes.

[0005] In a first aspect, an embodiment of the present application provides a method for determining a Charpy impact energy index, the method comprising:

[0006] Obtaining the first fracture toughness of the sample in the first environment;

[0007] determining a first Charpy impact energy index of the sample in a first environment according to the first fracture toughness;

[0008] determining a second fracture toughness of the sample in a second environment according to the first Charpy impact energy index;

[0009] determining a sensitive state of the sample in the second environment according to the first fracture toughness and the second fracture toughness;

[0010] A target Charpy impact energy index of the sample in the second environment is determined according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness.

[0011] In one possible implementation, determining a target Charpy impact energy index of the sample in the second environment according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness includes:

[0012] When the sensitive state of the sample in the second environment is insensitive, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment;

[0013] When the sensitive state of the sample in the second environment is sensitive, a target Charpy impact energy index of the sample in the second environment is determined according to the first fracture toughness and the second fracture toughness.

[0014] In a possible implementation, determining a target Charpy impact energy index of the sample in the second environment based on the first fracture toughness and the second fracture toughness includes:

[0015] determining a fracture toughness threshold of the sample in the second environment according to the first fracture toughness and the second fracture toughness;

[0016] A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold.

[0017] In a possible implementation, determining a target Charpy impact energy index of the sample in the second environment according to the fracture toughness threshold includes:

[0018] Obtaining a first preset relationship between fracture toughness and Charpy impact energy index in the first environment, wherein the first preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness;

[0019] A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold and the first preset relationship.

[0020] In a possible implementation, determining the sensitive state of the sample in the second environment according to the first fracture toughness and the second fracture toughness includes:

[0021] determining a sensitivity index of the sample to the second environment according to the first fracture toughness and the second fracture toughness;

[0022] The sensitive state of the sample in the second environment is determined according to the sensitivity index.

[0023] In one possible implementation, determining the sensitive state of the sample in the second environment according to the sensitivity index includes:

[0024] When the sensitivity index is less than or equal to a first threshold, determining the environmental sensitivity state of the sample as insensitive;

[0025] When the sensitivity index is greater than the first threshold, the environmental sensitivity state of the sample is determined to be sensitive.

[0026] In a possible implementation, determining the second fracture toughness of the sample in the second environment according to the first Charpy impact energy index includes:

[0027] Obtaining a second preset relationship between fracture toughness and Charpy impact energy index in the second environment, wherein the second preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness;

[0028] A second fracture toughness of the sample in the second environment is determined according to the first Charpy impact energy index and the second preset relationship.

[0029] In a second aspect, an embodiment of the present application provides a device for determining a Charpy impact energy index, the device comprising an acquisition module, a first determination module, a second determination module, a third determination module, and a fourth determination module, wherein:

[0030] The acquisition module is used to obtain a first fracture toughness of the sample in a first environment;

[0031] The first determining module is used to determine a first Charpy impact energy index of the sample in a first environment according to the first fracture toughness;

[0032] The second determining module is used to determine a second fracture toughness of the sample in a second environment according to the first Charpy impact energy index;

[0033] The third determination module is configured to determine the sensitive state of the sample in the second environment according to the first fracture toughness and the second fracture toughness;

[0034] The fourth determination module is configured to determine a target Charpy impact energy index of the sample in the second environment according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness.

[0035] In a possible implementation, the fourth determining module is specifically configured to:

[0036] When the sensitive state of the sample in the second environment is insensitive, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment;

[0037] When the sensitive state of the sample in the second environment is sensitive, a target Charpy impact energy index of the sample in the second environment is determined according to the first fracture toughness and the second fracture toughness.

[0038] In a possible implementation, the fourth determining module is specifically configured to:

[0039] determining a fracture toughness threshold of the sample in the second environment according to the first fracture toughness and the second fracture toughness;

[0040] A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold.

[0041] In a possible implementation, the fourth determining module is specifically configured to:

[0042] Obtaining a first preset relationship between fracture toughness and Charpy impact energy index in the first environment, wherein the first preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness;

[0043] A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold and the first preset relationship.

[0044] In a possible implementation, the third determining module is specifically configured to:

[0045] determining a sensitivity index of the sample to the second environment according to the first fracture toughness and the second fracture toughness;

[0046] The sensitive state of the sample in the second environment is determined according to the sensitivity index.

[0047] In a possible implementation, the third determining module is specifically configured to:

[0048] When the sensitivity index is less than or equal to a first threshold, determining the environmental sensitivity state of the sample as insensitive;

[0049] When the sensitivity index is greater than the first threshold, the environmental sensitivity state of the sample is determined to be sensitive.

[0050] In a possible implementation manner, the second determining module is specifically configured to:

[0051] Obtaining a second preset relationship between fracture toughness and Charpy impact energy index in the second environment, wherein the second preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness;

[0052] A second fracture toughness of the sample in the second environment is determined according to the first Charpy impact energy index and the second preset relationship.

[0053] In a third aspect, an embodiment of the present application provides a device for determining a Charpy impact energy index, comprising: a transceiver, a processor, and a memory;

[0054] The memory stores computer-executable instructions;

[0055] The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method for determining the Charpy impact energy index as described in any one of the first aspects.

[0056] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method for determining the Charpy impact energy index described in any one of the first aspects.

[0057] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the method for determining the Charpy impact energy index as described in any one of the above items.

[0058] The embodiments of the present application provide a method, device, and apparatus for determining the Charpy impact energy index. The method obtains a first fracture toughness of a sample in a first environment, determines a first Charpy impact energy index of the sample in the first environment based on the first fracture toughness, determines a second fracture toughness of the sample in a second environment based on the first Charpy impact energy index, determines the sensitivity of the sample in the second environment based on the first and second fracture toughnesses, and determines a target Charpy impact energy index of the sample in the second environment based on the sensitivity, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness. In the above method, since the first and second fracture toughnesses are measured for the same sample in different environments, the first and second fracture toughnesses can accurately reflect the sample's sensitivity to the environment. The fracture toughness can accurately determine the Charpy impact energy index of the sample in different environments, thereby improving the safety of oil pipe use. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 Schematic diagram of application scenarios provided by embodiments of the present application;

[0060] Figure 2 A flow chart of a method for determining a Charpy impact energy index provided in an embodiment of the present application;

[0061] Figure 3 A flow chart of another method for determining the Charpy impact energy index provided in an embodiment of the present application;

[0062] Figure 4 A corresponding relationship diagram between Charpy impact energy and fracture toughness provided in an embodiment of the present application;

[0063] Figure 5A schematic structural diagram of a device for determining a Charpy impact energy index provided in an embodiment of the present application;

[0064] Figure 6 Schematic diagram of the hardware structure of the device for determining the Charpy impact energy index provided in this application. DETAILED DESCRIPTION

[0065] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0066] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0067] To facilitate understanding, the concepts involved in the embodiments of the present application are first explained.

[0068] Terminal device: A device with wireless transceiver capabilities. Terminal devices can be deployed on land, including indoors or outdoors, handheld, wearable, or vehicle-mounted; they can also be deployed on water (such as ships); they can also be deployed in the air (such as airplanes, balloons, and satellites). The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a vehicle-mounted terminal device, a wireless terminal in self-driving, a wireless terminal in remote medical care, a wireless terminal in smart grids, a wireless terminal in transportation safety, a wireless terminal in smart cities, a wireless terminal in smart homes, a wearable terminal device, etc. The terminal devices involved in the embodiments of the present application may also be referred to as terminals, user equipment (UE), access terminal devices, vehicle-mounted terminals, industrial control terminals, UE units, UE stations, mobile stations, mobile stations, remote stations, remote terminal devices, mobile devices, UE terminal devices, wireless communication devices, UE agents, or UE devices, etc. The terminal devices may also be fixed or mobile.

[0069] Charpy Impact Energy Index: Charpy impact energy is the impact energy used in the Charpy impact test. The Charpy impact energy test is used to determine the toughness of metallic materials. For example, a pendulum raised by a testing machine strikes a sample, causing it to break along the notch. The impact energy absorbed by the sample at fracture is calculated based on the height difference at which the pendulum is re-raised. The greater the impact energy absorbed by the sample, the higher its toughness. The Charpy impact energy index is the Charpy impact energy index that samples must meet during production. For example, during production, the Charpy impact energy of each sample must exceed the Charpy impact energy index.

[0070] Fracture toughness: Fracture toughness characterizes a material's ability to resist crack propagation and is a quantitative measure of a material's toughness. For example, for a given crack size, a higher fracture toughness value indicates a greater critical stress for unstable crack propagation and a higher toughness. Similarly, for a given external force, a higher fracture toughness value indicates a larger critical size for unstable crack propagation. Alternatively, a material's fracture toughness may be related to its environment. For example, the same material may have greater fracture toughness in a non-corrosive environment than in a corrosive environment.

[0071] Next, combine Figure 1 , describes the application scenarios to which the embodiments of the present application are applicable.

[0072] Figure 1 This is a schematic diagram of the application scenario provided by the embodiment of this application. Figure 1 , including a terminal device. The terminal device receives the first fracture toughness of the sample, and determines the first Charpy impact energy index of the sample in an environment without sensitive media at room temperature and pressure based on the first fracture toughness. The terminal device determines the second fracture toughness of the sample in an environment with sensitive media at room temperature and pressure based on the first Charpy impact energy index, and then determines the sensitive state of the sample in the second environment based on the first fracture toughness and the second fracture toughness. If the sample is not sensitive to the second environment, the terminal device outputs the first Charpy impact energy index as the target Charpy impact energy index of the sample in the second environment. If the sample is sensitive to the second environment, the terminal device outputs the target Charpy impact energy index of the sample in the second environment based on the first fracture toughness and the second fracture toughness. Since the first fracture toughness and the second fracture toughness are measured for the same sample in different environments, the first fracture toughness and the second fracture toughness can accurately reflect the sensitivity of the sample to the environment. The fracture toughness can be used to accurately determine the Charpy impact energy index of the sample in different environments, thereby improving the safety of the use of oil pipes.

[0073] In related art, the Charpy impact energy index for OCTG is determined based on its yield strength and wall thickness. For example, the minimum impact energy that OCTG can withstand in the transverse direction is set to be greater than or equal to 10% of its yield strength. However, in practical applications, OCTG is susceptible to damage due to environmental factors such as corrosion, making it more susceptible to damage. Therefore, it is difficult to determine an effective Charpy impact energy index based on yield strength and wall thickness, resulting in a lower safety rating for OCTG use.

[0074] To address the technical issue of low safety in the use of oil pipes in related technologies, embodiments of the present application provide a method for determining a Charpy impact energy index. The method obtains a first fracture toughness of an oil pipe sample in a first environment (normal temperature and pressure) and, based on the first fracture toughness, determines a first Charpy impact energy index for the oil pipe sample in the first environment. Based on the first Charpy impact energy index, a second fracture toughness of the oil pipe sample in a second environment (hydrogen sulfide) is determined. The degree of influence of the second environment on the fracture toughness of the oil pipe sample is determined based on the change between the first and second fracture toughnesses. When the second environment significantly influences the fracture toughness of the oil pipe sample, the first and second fracture toughnesses can be combined to accurately determine the fracture toughness threshold of the sample in the second environment. This allows the target Charpy impact energy index of the oil pipe sample in the second environment to be accurately determined, thereby improving the safety of oil pipe use.

[0075] The technical solutions shown in this application are described in detail below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other, and the same or similar contents will not be repeated in different embodiments.

[0076] Figure 2 This is a flow chart of a method for determining the Charpy impact energy index provided in an embodiment of the present application. Figure 2 , the method may include:

[0077] S201. Obtain a first fracture toughness of the sample in a first environment.

[0078] The execution subject of the embodiment of the present application can be a terminal device, or a device for determining the Charpy impact energy index set in the terminal device. Optionally, the device for determining the Charpy impact energy index can be implemented by software, or by a combination of software and hardware.

[0079] The sample may be a metal material for which the Charpy impact energy index is to be determined. For example, the sample may be a material such as oil pipe or steel bar. The first environment may be an environment that has no effect on the fracture toughness of the sample. For example, the first environment may be an environment at normal temperature and pressure.

[0080] The first fracture toughness is the fracture toughness threshold of the sample in the first environment. For example, the first fracture toughness of the oil pipe can be the minimum fracture toughness that the oil pipe needs to achieve at room temperature and pressure in an environment without corrosive gases in the air.

[0081] Optionally, the first fracture toughness of the sample in the first environment can be obtained according to the following feasible implementation method: the first fracture toughness of the sample in the first environment is determined based on the sample information. The sample information includes the sample size and the sample material. For example, if the material of the oil pipe is 110 steel grade, with an outer diameter of 114.3 mm and an inner wall of 12.7 mm, then the fracture toughness of the oil pipe in an environment with normal temperature and differential pressure and no corrosive gas in the air is greater than or equal to 52.90 MPa·m 1 / 2 .

[0082] Alternatively, the first fracture toughness of the sample in the first environment can be obtained experimentally. For example, a Charpy impact test can be performed to obtain multiple samples subjected to different impact energies. The fracture toughness of the multiple samples after impact can be measured using a universal testing machine. The average of the multiple fracture toughness values ​​can be determined as the first fracture toughness of the sample in the first environment.

[0083] S202. Determine a first Charpy impact energy index of the sample in a first environment based on the first fracture toughness.

[0084] The first Charpy impact energy index is the Charpy impact energy index of the sample in the first environment. For example, the first Charpy impact energy index is the Charpy impact energy index of the sample at room temperature and pressure, and in an environment without corrosive gases in the air. Optionally, the first Charpy impact energy index of the sample in the first environment can be determined based on a first preset relationship between the fracture toughness and the Charpy impact energy index in the first environment. For example, the first preset relationship between the fracture toughness and the Charpy impact energy index in the first environment can be as shown in Table 1:

[0085] Table 1

[0086] fracture toughness Charpy impact energy index Fracture toughness 1 Charpy impact energy index 1 Fracture toughness 2 Charpy impact energy index 2 Fracture toughness 3 Charpy impact energy index 3 …… ……

[0087] It should be noted that Table 1 is only an example of the first preset relationship between the fracture toughness and the Charpy impact energy index in the first environment, and does not limit the corresponding relationship between the fracture toughness and the Charpy impact energy in the first environment.

[0088] For example, when the first fracture toughness of the sample in the first environment is fracture toughness 1, the first Charpy impact energy index of the sample in the first environment is Charpy impact energy index 1; when the first fracture toughness of the sample in the first environment is fracture toughness 2, the first Charpy impact energy index of the sample in the first environment is Charpy impact energy index 2; when the first fracture toughness of the sample in the first environment is fracture toughness 3, the first Charpy impact energy index of the sample in the first environment is Charpy impact energy index 3.

[0089] S203. Determine the second fracture toughness of the sample in the second environment according to the first Charpy impact energy index.

[0090] The second environment may be the environment of the installation site of the sample. For example, when the petroleum pipe is installed in an environment where hydrogen sulfide gas exists in the air, the second environment may be an environment where hydrogen sulfide gas exists in the air.

[0091] The second fracture toughness is the fracture toughness of the sample in the second environment. For example, the second fracture toughness of the oil pipe can be the fracture toughness of the oil pipe in an environment of low temperature and low pressure with corrosive gas in the air.

[0092] Optionally, the second fracture toughness of the sample in the second environment can be determined according to the following feasible implementation method: obtaining a second preset relationship between the fracture toughness and the Charpy impact energy index in the second environment. The second preset relationship includes at least one fracture toughness and the Charpy impact energy index corresponding to each fracture toughness. For example, the second preset relationship between the fracture toughness and the Charpy impact energy index in the second environment can be as shown in Table 2:

[0093] Table 2

[0094] Charpy impact energy index fracture toughness Charpy impact energy index 1 Fracture toughness 1 Charpy impact energy index 2 Fracture toughness 2 Charpy impact energy index 3 Fracture toughness 3 …… ……

[0095] It should be noted that Table 2 is merely an example of the second preset relationship between the fracture toughness and the Charpy impact energy index in the second environment, and does not limit the second preset relationship between the fracture toughness and the Charpy impact energy index in the second environment.

[0096] The second fracture toughness of the sample in the second environment is determined based on the first Charpy impact energy index and the second preset relationship. For example, when the first Charpy impact energy index of the sample is Charpy impact energy index 1, the second fracture toughness of the sample in the second environment is fracture toughness 1; when the first Charpy impact energy index of the sample is Charpy impact energy index 2, the second fracture toughness of the sample in the second environment is fracture toughness 2; and when the first Charpy impact energy index of the sample is Charpy impact energy index 3, the second fracture toughness of the sample in the second environment is fracture toughness 3.

[0097] S204. Determine the sensitive state of the sample in the second environment according to the first fracture toughness and the second fracture toughness.

[0098] The sensitivity state indicates whether the second environment affects the fracture toughness of the sample. Optionally, the sensitivity state can be sensitive or insensitive. For example, if the sensitivity state of the sample to the second environment is sensitive, the second environment affects the fracture toughness of the sample. If the sensitivity state of the sample to the environment is insensitive, the second environment does not affect the fracture toughness of the sample.

[0099] Optionally, the sensitive state of the sample in the second environment can be determined according to the following feasible implementation method: based on the first fracture toughness and the second fracture toughness, a sensitivity index of the sample to the second environment is determined. The sensitivity index is used to indicate the sensitivity of the sample to the second environment. Optionally, when the sensitive state of the sample in the second environment is sensitive, the higher the sensitivity of the sample to the second environment, the greater the impact of the second environment on the fracture toughness of the sample. For example, when the sensitivity of the sample to the second environment is high, the second environment has a greater impact on the fracture toughness of the sample; when the sensitivity of the sample to the second environment is low, the second environment has a smaller impact on the fracture toughness of the sample.

[0100] The sensitivity state of the sample in the second environment is determined based on the sensitivity index. Optionally, when the sensitivity index is less than or equal to a first threshold, the environmental sensitivity state of the sample is determined to be insensitive; when the sensitivity index is greater than the first threshold, the environmental sensitivity state of the sample is determined to be sensitive. For example, when the sensitivity index is less than or equal to the first threshold, it indicates that the fracture toughness of the sample in the second environment has changed less than that in the first environment, and the second environment will not affect the fracture toughness of the sample; when the sensitivity index is greater than the first threshold, it indicates that the fracture toughness of the sample in the second environment has changed more than that in the first environment, and the second environment will affect the fracture toughness of the sample.

[0101] Optionally, the sensitivity index of the sample to the second environment can be determined according to the following formula:

[0102] k=(K IC -K ISSC ) / K IC

[0103] Wherein, k is the sensitivity index of the sample to the second environment; K IC K is the first fracture toughness of the sample in the first environment; ISSC is the second fracture toughness of the sample in the second environment.

[0104] For example, if the first fracture toughness of the sample in the first environment is 50 MPa·m 1 / 2 The second fracture toughness of the sample in the second environment is 20 MPa·m 1 / 2 , the sensitivity index of the sample to the second environment is 60%, indicating that compared with the first environment, the second environment has a greater impact on the fracture toughness of the sample; if the first fracture toughness of the sample in the first environment is the same as the second fracture toughness of the sample in the second environment, the sensitivity index of the sample to the second environment is zero, indicating that compared with the first environment, the second environment will not affect the fracture toughness of the sample.

[0105] S205 , determining a target Charpy impact energy index of the sample in the second environment according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness.

[0106] The target Charpy impact energy index may be the Charpy impact energy index of the sample in the second environment. For example, the target Charpy impact energy index may be the Charpy impact energy index of the sample in an environment of low temperature and low pressure with corrosive gas in the air.

[0107] The target Charpy impact energy index of the sample in the second environment is determined based on the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness. There are two situations as follows:

[0108] Case 1: The sensitive state of the sample in the second environment is insensitive.

[0109] When the sample's sensitivity in the second environment is insensitive, the first Charpy impact energy index can be determined as the target Charpy impact energy index for the sample in the second environment. For example, when obtaining the fracture toughness of the sample in the first environment, the first Charpy impact energy index of the sample in the first environment can be determined based on the first preset relationship. If the second environment does not affect the fracture toughness of the sample compared to the first environment, the first Charpy impact energy index of the sample in the first environment can be determined as the target Charpy impact energy index for the sample in the second environment.

[0110] In this case, since the second environment does not affect the fracture toughness of the sample compared to the first environment, the fracture toughness of the sample in the first environment and the second environment is the same. Therefore, the first Charpy impact energy index of the sample in the first environment can be determined as the second Charpy impact energy index of the sample in the second environment, thereby improving the accuracy of determining the Charpy impact energy index of the sample and improving the safety of the sample when used.

[0111] Case 2: The sensitive state of the sample in the second environment is sensitive.

[0112] When the sample's sensitive state in the second environment is sensitive, a target Charpy impact energy index for the sample in the second environment is determined based on the first and second fracture toughnesses. For example, if the second environment affects the sample's fracture toughness compared to the first environment, a fracture toughness threshold for the sample in the second environment can be determined based on the first and second fracture toughnesses. Based on the fracture toughness threshold, a target Charpy impact energy index for the sample in the second environment is determined.

[0113] In this case, since the second environment will affect the fracture toughness of the sample compared to the first environment, the fracture toughness threshold of the sample in the second environment can be determined based on the first fracture toughness in the first environment and the second fracture toughness corresponding to the first Charpy impact energy index in the second environment. Then, based on the fracture toughness threshold, the target Charpy impact energy index of the sample in the second environment can be accurately determined, thereby improving the safety of the sample during use.

[0114] The present invention provides a method for determining a Charpy impact energy index. The method comprises obtaining a first fracture toughness of a sample in a first environment and determining the first Charpy impact energy index of the sample in the first environment based on the first fracture toughness. A second predetermined relationship between the fracture toughness and the Charpy impact energy index in a second environment is obtained. Based on the first and second predetermined relationships, a second fracture toughness of the sample in the second environment is determined. Based on the first and second fracture toughnesses, a sensitivity index of the sample to the second environment is determined. The sensitivity of the sample in the second environment is then determined based on the sensitivity index. If the sample is insensitive in the second environment, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment. If the sample is sensitive in the second environment, the target Charpy impact energy index of the sample in the second environment is determined based on the first and second fracture toughnesses. In this method, since the first and second fracture toughnesses are measured for the same sample in different environments, the sensitivity index determined based on the first and second fracture toughnesses can accurately reflect the sample's sensitivity to the environment. Combined with the sample's fracture toughness, the Charpy impact energy index of the sample in different environments can be accurately determined, thereby improving the safety of oil pipes.

[0115] exist Figure 2 Based on the embodiment shown, the following Figure 3 , the determination method of the above-mentioned Charpy impact energy index is explained in detail.

[0116] Figure 3 This is a flow chart of another method for determining the Charpy impact energy index provided in the embodiment of the present application. Figure 3 , the method may include:

[0117] S301. Obtain a first fracture toughness of the sample in a first environment.

[0118] It should be noted that the execution process of S301 can refer to the execution process of S201 and will not be described in detail here.

[0119] S302. Determine a first Charpy impact energy index of the sample in a first environment based on the first fracture toughness.

[0120] It should be noted that the execution process of S302 can refer to the execution process of S202, and will not be repeated here.

[0121] S303. Determine the second fracture toughness of the sample in the second environment according to the first Charpy impact energy index.

[0122] Optionally, the second fracture toughness of the sample in the second environment may be determined based on the first Charpy impact energy index and the second preset relationship.

[0123] The following describes a process of obtaining the second preset relationship between the fracture toughness and the Charpy impact energy index in the second environment through a specific example.

[0124] Obtain five Charpy impact energy measurements of the sample in the second environment, with the span of the Charpy impact energy of the five samples being greater than or equal to 20 J. For example, the Charpy impact energy of the first sample is 20 J, the Charpy impact energy of the second sample is 40 J, the Charpy impact energy of the third sample is 60 J, the Charpy impact energy of the fourth sample is 80 J, and the Charpy impact energy of the fifth sample is 100 J. Optionally, when performing the Charpy impact energy test, the model of the box-type resistance furnace is SMT-10-12A, the model of the pendulum impact testing machine is ZBC2302-C, and the material of the sample is 110 grade steel, with an outer diameter of 114.3 mm and an inner wall of 12.7 mm.

[0125] Five specimens were tested using a universal testing machine (MTS880-25T) to determine the fracture toughness of each specimen. Testing was performed according to GB / T4161-2007. The fracture toughness corresponding to each Charpy impact energy was established. Through mathematical fitting modeling, the corresponding relationship between the fracture toughness and Charpy impact energy in the first environment was determined.

[0126] S304: Determine the sensitive state of the sample in the second environment according to the first fracture toughness and the second fracture toughness.

[0127] It should be noted that the execution process of S304 can refer to the execution process of S204, and will not be described in detail here.

[0128] S305: When the sensitive state of the sample in the second environment is insensitive, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment.

[0129] It should be noted that the execution process of S305 can refer to the execution process of S205, and will not be repeated here.

[0130] S306. When the sensitive state of the sample in the second environment is sensitive, determine the fracture toughness threshold of the sample in the second environment according to the first fracture toughness and the second fracture toughness.

[0131] The fracture toughness threshold is the minimum fracture toughness required for a sample in the second environment. For example, when producing oil pipes, if the installation location is where hydrogen sulfide is present in the air, the fracture toughness of the oil pipes must be greater than or equal to the fracture toughness threshold.

[0132] Optionally, the fracture toughness threshold of the sample in the second environment can be determined according to the following formula:

[0133] K′ IC =K IC (1+(K IC -K ISSC ) / K IC )

[0134] Among them, K′ IC is the fracture toughness threshold of the sample in the second environment, K IC K is the first fracture toughness of the sample in the first environment; ISSC is the second fracture toughness of the sample in the second environment.

[0135] For example, if the first fracture toughness of the sample in the first environment is 50 MPa·m 1 / 2 The second fracture toughness of the sample in the second environment is 20 MPa·m 1 / 2 , then the fracture toughness threshold of the sample in the second environment is 80 MPa·m 1 / 2 .

[0136] S307. Determine a target Charpy impact energy index of the sample in the second environment based on the fracture toughness threshold.

[0137] Optionally, the target Charpy impact energy index of the sample in the second environment can be determined according to the following feasible implementation method: a first preset relationship between the fracture toughness and the Charpy impact energy index in the first environment is obtained (as shown in Table 1), wherein the first preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture thermal property.

[0138] The following describes a process of obtaining a first preset relationship between fracture toughness and Charpy impact energy in a first environment through a specific example.

[0139] At room temperature and pressure, 110 steel grade, 114.3 mm outer diameter, 12.7 mm inner wall, and super 13Cr oil pipe samples were heat treated using different processes using a box-type resistance furnace and a pendulum impact tester. Six oil pipe samples were obtained with Charpy impact energies of 205 J, 185 J, 169 J, 155 J, 142 J, and 97 J, respectively. The box-type resistance furnace model is SMT-10-12A, and the pendulum impact tester model is ZBC2302-C.

[0140] The six oil pipe samples were tested using a universal testing machine, and the fracture toughness of the six oil pipe samples was 101.61 MPa·m 1 / 2 , 93.17MPa·m 1 / 2 、81.91MPa·m 1 / 2、79.60MPa·m 1 / 2 、77.74MPa·m 1 / 2 、65.14MPa·m 1 / 2 .

[0141] According to the fracture toughness corresponding to 6 different Charpy impact energies, the corresponding relationship between Charpy impact energy and fracture toughness is established.

[0142] Next, combine Figure 4 , details the corresponding relationship between Charpy impact energy and fracture toughness.

[0143] Figure 4 This is a graph showing the relationship between Charpy impact energy and fracture toughness provided in the examples of this application. Figure 4 The horizontal axis of the coordinate axis is the ratio of Charpy impact energy to yield strength, and the vertical axis of the coordinate axis is the square of the ratio of fracture toughness to yield strength. The Charpy impact energy is 205J, 185J, 169J, 155J, 142J, and 97J respectively, and the fracture toughness is 101.61MPa·m 1 / 2 , 93.17MPa·m 1 / 2 、81.91MPa·m 1 / 2 、79.60MPa·m 1 / 2 、77.74MPa·m 1 / 2 、65.14MPa·m 1 / 2 , the yield strength is 758 MPa, and the corresponding relationship diagram between Charpy impact energy and fracture toughness is obtained.

[0144] Optionally, mathematical methods can be used to Figure 4 The relationship diagram between Charpy impact energy and fracture toughness shown in FIG1 is fitted and modeled to obtain a mathematical model of Charpy impact energy and fracture toughness. Further, through the mathematical model, the Charpy impact energy index corresponding to the fracture toughness in the first environment can be obtained.

[0145] The Charpy impact energy corresponding to the fracture toughness threshold in the first preset relationship is determined as the target Charpy impact energy index of the sample in the second environment.

[0146] The present application provides a method for determining a Charpy impact energy index. The method comprises obtaining a first fracture toughness of a sample in a first environment, determining a first Charpy impact energy index of the sample in the first environment based on the first fracture toughness, determining a second fracture toughness of the sample in a second environment based on the first Charpy impact energy index, and determining the sensitivity of the sample in the second environment based on the first and second fracture toughnesses. If the sensitivity of the sample in the second environment is insensitive, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment. If the sensitivity of the sample in the second environment is sensitive, a fracture toughness threshold of the sample in the second environment is determined based on the first and second fracture toughnesses, and the target Charpy impact energy index of the sample in the second environment is determined based on the fracture toughness threshold. In this method, if the sample is sensitive to the second environment, the fracture toughness threshold of the sample in the second environment is accurately determined based on the first and second fracture toughnesses. Furthermore, based on the fracture toughness threshold and a first predetermined relationship, the target Charpy impact energy index of the sample in the second environment can be accurately obtained, thereby improving the safety of oil pipes in use.

[0147] Based on any of the above embodiments, the process of determining the Charpy impact energy index is described in detail below through specific examples.

[0148] In this embodiment, the first environment is normal temperature and pressure, with no corrosive gases in the air. The second environment is normal temperature and pressure, with hydrogen sulfide in the air. The sample is 110 steel grade, 114.3 mm outer diameter, 12.7 mm inner wall, and super 13Cr oil pipe. The six Charpy impact energies of the oil pipe specimens are 205J, 185J, 169J, 155J, 142J, and 97J, respectively. Optionally, the box-type resistance furnace model is SMT-10-12A, and the pendulum impact tester model is ZBC2302-C.

[0149] The six oil pipe samples were tested using a universal testing machine, and the fracture toughness of the six oil pipe samples was 101.61 MPa·m 1 / 2 , 93.17MPa·m 1 / 2 、81.91MPa·m 1 / 2 、79.60MPa·m 1 / 2 、77.74MPa·m 1 / 2 、65.14MPa·m 1 / 2 .

[0150] According to the six Charpy impact energies and the corresponding fracture toughness, the mathematical model of Charpy impact energy and fracture toughness in the first environment is obtained as follows:

[0151]

[0152] Among them, K IC is the fracture toughness; R t0.6 is the yield strength; A KV It is the Xiabi impact power.

[0153] According to the requirements for the use of oil pipes at room temperature and pressure, the first fracture toughness of the oil pipe with a given grade of 110 steel, an outer diameter of 114.3 mm, an inner wall of 12.7 mm, and super 13Cr in the first environment is 52.9 MPa·m 1 / 2 The yield strength of 110 steel grade is 758MPa. According to the model, the first Charpy impact energy index of oil pipe in the first environment is 90J.

[0154] Using the D method of the NACE 0177 standard, the fracture toughness of oil pipes in the second environment can be measured, and the corresponding relationship between Charpy impact energy and fracture toughness in the second environment can be established. Based on the first Charpy impact energy index of 90J, the corresponding relationship between Charpy impact energy and fracture toughness in the second environment can be applied. It can be obtained that the fracture toughness of oil pipes with a Charpy impact energy of 90J in a hydrogen sulfide environment is 33.90MPa·m 1 / 2 .

[0155] According to the first fracture toughness and the second fracture toughness, the sensitivity index of the oil pipe to the second environment is 36%, indicating that the oil pipe is sensitive in the second environment. Furthermore, according to the first fracture toughness and the second fracture toughness, the fracture toughness threshold of the oil pipe in the second environment is 71.9 MPa·m 1 / 2 Based on the mathematical model of the fracture toughness threshold, Charpy impact energy, and fracture toughness, the Charpy impact energy index of OCTG in the second environment is 140J. In other words, the Charpy impact energy of OCTG produced must be 140J. This allows the combination of the primary and secondary fracture toughness values ​​of OCTG in different environments to accurately determine whether the OCTG is sensitive to the second environment. If the OCTG is sensitive to the second environment, the primary and secondary fracture toughness values ​​can be used to accurately determine the fracture toughness threshold of the sample in the second environment, thereby obtaining an accurate target Charpy impact energy index and improving the safety of OCTG use.

[0156] Figure 5 This is a schematic diagram of the structure of a device for determining the Charpy impact energy index provided in an embodiment of the present application. The device 10 for determining the Charpy impact energy index can be set in a terminal device. Figure 5 The device 10 for determining the Charpy impact energy index may include an acquisition module 11, a first determination module 12, a second determination module 13, a third determination module 14, and a fourth determination module 15, wherein:

[0157] The acquisition module 11 is used to obtain a first fracture toughness of the sample in a first environment;

[0158] The first determining module 12 is configured to determine a first Charpy impact energy index of the sample in a first environment according to the first fracture toughness;

[0159] The second determining module 13 is configured to determine a second fracture toughness of the sample in a second environment according to the first Charpy impact energy index;

[0160] The third determining module 14 is configured to determine the sensitive state of the sample in the second environment according to the first fracture toughness and the second fracture toughness;

[0161] The fourth determining module 15 is configured to determine a target Charpy impact energy index of the sample in the second environment according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness.

[0162] In a possible implementation, the fourth determining module 15 is specifically configured to:

[0163] When the sensitive state of the sample in the second environment is insensitive, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment;

[0164] When the sensitive state of the sample in the second environment is sensitive, a target Charpy impact energy index of the sample in the second environment is determined according to the first fracture toughness and the second fracture toughness.

[0165] In a possible implementation, the fourth determining module 15 is specifically configured to:

[0166] determining a fracture toughness threshold of the sample in the second environment according to the first fracture toughness and the second fracture toughness;

[0167] A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold.

[0168] In a possible implementation, the fourth determining module 15 is specifically configured to:

[0169] Obtaining a first preset relationship between fracture toughness and Charpy impact energy index in the first environment, wherein the first preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness;

[0170] A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold and the first preset relationship.

[0171] In a possible implementation, the third determining module 14 is specifically configured to:

[0172] determining a sensitivity index of the sample to the second environment according to the first fracture toughness and the second fracture toughness;

[0173] The sensitive state of the sample in the second environment is determined according to the sensitivity index.

[0174] In a possible implementation, the third determining module 14 is specifically configured to:

[0175] When the sensitivity index is less than or equal to a first threshold, determining the environmental sensitivity state of the sample as insensitive;

[0176] When the sensitivity index is greater than the first threshold, the environmental sensitivity state of the sample is determined to be sensitive.

[0177] In a possible implementation manner, the second determining module 13 is specifically configured to:

[0178] Obtaining a second preset relationship between fracture toughness and Charpy impact energy index in the second environment, wherein the second preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness;

[0179] A second fracture toughness of the sample in the second environment is determined according to the first Charpy impact energy index and the second preset relationship.

[0180] The device for determining the Charpy impact energy index provided in the embodiment of the present application can implement the technical solution shown in the above method embodiment. Its implementation principle and beneficial effects are similar and will not be repeated here.

[0181] Figure 6 Schematic diagram of the hardware structure of the device for determining the Charpy impact energy index provided in this application. Figure 6 The Charpy impact energy index determination device 20 may include: a processor 21 and a memory 22, wherein the processor 21 and the memory 22 can communicate; illustratively, the processor 21 and the memory 22 communicate via a communication bus 23, the memory 22 is used to store program instructions, and the processor 21 is used to call the program instructions in the memory to execute the Charpy impact energy index determination method shown in any of the above method embodiments.

[0182] Optionally, the Charpy impact energy index determination device 20 may further include a communication interface, which may include a transmitter and / or a receiver.

[0183] Optionally, the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), or application-specific integrated circuits (ASICs). A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in this application may be directly implemented by a hardware processor or implemented by a combination of hardware and software modules in the processor.

[0184] The present application provides a readable storage medium having a computer program stored thereon; the computer program is used to implement the method for determining the Charpy impact energy index as described in any of the above embodiments.

[0185] An embodiment of the present application provides a computer program product, which includes instructions. When the instructions are executed, a computer executes the above-mentioned method for determining the Charpy impact energy index.

[0186] All or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a readable memory. When the program is executed, it performs the steps of the above-mentioned method embodiments; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid-state drive, magnetic tape, floppy disk, optical disc, and any combination thereof.

[0187] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processing unit of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable terminal device to generate a machine, so that the instructions executed by the processing unit of the computer or other programmable terminal device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0188] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0189] These computer program instructions can also be loaded onto a computer or other programmable terminal device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0190] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations.

[0191] In this application, the term "include" and its variations may refer to non-restrictive inclusion; the term "or" and its variations may refer to "and / or". In this application, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In this application, "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and subsequent associated objects are in an "or" relationship.

Claims

1. A method for determining a Charpy impact energy index, characterized in that: include: Obtaining the first fracture toughness of the sample in the first environment; determining a first Charpy impact energy index of the sample in a first environment according to the first fracture toughness; determining a second fracture toughness of the sample in a second environment according to the first Charpy impact energy index; determining a sensitivity index of the sample to the second environment according to the first fracture toughness and the second fracture toughness; When the sensitivity index is less than or equal to a first threshold, determining the sensitive state of the sample as insensitive; When the sensitivity index is greater than the first threshold, determining the sensitive state of the sample as sensitive; A target Charpy impact energy index of the sample in the second environment is determined according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness.

2. The method according to claim 1, characterized in that Determining a target Charpy impact energy index of the sample in the second environment according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness includes: When the sensitive state of the sample in the second environment is insensitive, the first Charpy impact energy index is determined as the target Charpy impact energy index of the sample in the second environment; When the sensitive state of the sample in the second environment is sensitive, a target Charpy impact energy index of the sample in the second environment is determined according to the first fracture toughness and the second fracture toughness.

3. The method according to claim 2, characterized in that Determining a target Charpy impact energy index of the sample in the second environment according to the first fracture toughness and the second fracture toughness includes: determining a fracture toughness threshold of the sample in the second environment according to the first fracture toughness and the second fracture toughness; A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold.

4. The method according to claim 3, characterized in that Determining a target Charpy impact energy index of the sample in the second environment according to the fracture toughness threshold includes: Obtaining a first preset relationship between fracture toughness and Charpy impact energy index in the first environment, wherein the first preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness; A target Charpy impact energy index of the sample in the second environment is determined according to the fracture toughness threshold and the first preset relationship.

5. The method according to any one of claims 1 to 4, characterized in that Determining a second fracture toughness of the sample in a second environment according to the first Charpy impact energy index includes: Obtaining a second preset relationship between fracture toughness and Charpy impact energy index in the second environment, wherein the second preset relationship includes at least one fracture toughness and a Charpy impact energy index corresponding to each fracture toughness; A second fracture toughness of the sample in the second environment is determined according to the first Charpy impact energy index and the second preset relationship.

6. A device for determining Charpy impact energy index, characterized in that: It includes an acquisition module, a first determination module, a second determination module, a third determination module and a fourth determination module, wherein: The acquisition module is used to obtain a first fracture toughness of the sample in a first environment; The first determining module is used to determine a first Charpy impact energy index of the sample in a first environment according to the first fracture toughness; The second determining module is used to determine a second fracture toughness of the sample in a second environment according to the first Charpy impact energy index; The third determination module is configured to determine a sensitivity index of the sample to the second environment based on the first fracture toughness and the second fracture toughness; when the sensitivity index is less than or equal to a first threshold, determine the sensitive state of the sample as insensitive; and when the sensitivity index is greater than the first threshold, determine the sensitive state of the sample as sensitive; The fourth determination module is configured to determine a target Charpy impact energy index of the sample in the second environment according to the sensitive state, the first Charpy impact energy index, the first fracture toughness, and the second fracture toughness.

7. A device for determining Charpy impact energy index, characterized in that: include: transceivers, processors, and memory; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method for determining the Charpy impact energy index according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method for determining the Charpy impact energy index according to any one of claims 1 to 5.

9. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the method for determining the Charpy impact energy index according to any one of claims 1 to 5 is implemented.

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