Extra-large size hot isostatic pressing equipment and method for controlling temperature uniformity in the entire thermal field

Abstract

The present invention is a super-large-sized hot isostatic pressing equipment and a method for controlling the temperature uniformity of the entire thermal field. The super-large-sized hot isostatic pressing equipment includes: a hot isostatic pressing equipment body, a plurality of temperature control parts are built into the hot isostatic pressing equipment body to form a plurality of heating zones that can be individually controlled in temperature on the hot isostatic pressing equipment body; a plurality of heating elements, a plurality of heating elements corresponding to a plurality of the temperature control parts one by one, and a plurality of heating elements are respectively arranged in the corresponding temperature control parts to control the temperature of the corresponding heating zones; a plurality of heating elements cooperate to control the overall temperature uniformity of the hot isostatic pressing equipment body. The present invention can realize the zoning control of the temperature of the entire thermal field of the hot isostatic pressing equipment, can ensure the uniformity and temperature stability of the entire thermal field of the hot isostatic pressing equipment, and meet the temperature control requirements for super-large-sized hot isostatic pressing equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of hot isostatic pressing, and in particular to an extra-large-size hot isostatic pressing equipment and a method for controlling the temperature uniformity of the entire thermal field. Background Art

[0002] The Hot Isostatic Pressing (HIP) process is to place the product in a closed container, apply equal pressure (high pressure) to the product in all directions, and apply high temperature at the same time, so that the product can be sintered and densified under the action of high temperature and high pressure. Hot isostatic pressing is an indispensable means for the production of high-performance materials and the development of new materials; hot isostatic pressing can directly form powder, and the powder is loaded into a sleeve (similar to the role of a mold). The sleeve can be made of metal or ceramic (low-carbon steel, Ni, Mo, glass, etc.), and then nitrogen or argon is used as a pressurized medium to heat and pressurize the powder directly to sinter and form a powder metallurgy process; or the formed castings (including aluminum alloys, titanium alloys, high-temperature alloys, etc.) are subjected to thermal densification treatment. After hot isostatic pressing treatment, the castings can reach 100% densification, achieving the purpose of improving the overall mechanical properties of the castings.

[0003] The temperature uniformity of the hot isostatic pressing equipment is an important technical parameter in the hot isostatic pressing densification process. For the extra-large hot isostatic pressing equipment, the workpieces to be pressed are large in size, especially the temperature uniformity in the height direction of the hot field is more prominent. Once the temperature is uneven, it will directly lead to the appearance of internal stress in the product. In mild cases, residual stress will be generated inside the workpiece. In severe cases, cracks will be directly generated on the workpiece, resulting in the scrapping of the workpiece. However, the hot isostatic pressing equipment of extra-large sizes cannot meet the requirements of thermal field temperature and uniform temperature stability, which limits the development and application of extra-large hot isostatic pressing equipment.

[0004] With regard to the problem in related technologies that hot isostatic pressing equipment has poor ability to control thermal field temperature and uniform temperature stability, no effective solution has been given so far.

[0005] Therefore, the inventor, relying on many years of experience and practice in related industries, proposes an extra-large-size hot isostatic pressing equipment and a method for controlling the temperature uniformity of the entire thermal field to overcome the defects of the prior art. Summary of the invention

[0006] The object of the present invention is to provide an extra-large-sized hot isostatic pressing equipment and a method for controlling the temperature uniformity of the entire thermal field. Heating elements are arranged in zones on the hot isostatic pressing equipment to achieve zoned control of the temperature of the entire hot isostatic pressing equipment, which can ensure the uniformity and temperature stability of the entire thermal field of the hot isostatic pressing equipment and meet the temperature control requirements of the extra-large-sized hot isostatic pressing equipment.

[0007] The purpose of the present invention can be achieved by adopting the following scheme:

[0008] The present invention provides an extra-large-size hot isostatic pressing equipment, the extra-large-size hot isostatic pressing equipment comprising:

[0009] A hot isostatic pressing equipment body, wherein the hot isostatic pressing equipment body has a plurality of temperature control parts built therein, so as to form a plurality of heating zones on the hot isostatic pressing equipment body that can be individually temperature-controlled;

[0010] A plurality of heating elements, each of which corresponds to the plurality of temperature control parts, and each of which is disposed in a corresponding temperature control part to control the temperature of the corresponding heating area;

[0011] The plurality of heating elements cooperate with each other to control the overall temperature uniformity of the main body of the hot isostatic pressing equipment.

[0012] In a preferred embodiment of the present invention, a temperature measuring element is provided on the temperature control part, and the temperature measuring element is used to detect the temperature of the corresponding temperature control part.

[0013] In a preferred embodiment of the present invention, the heating element includes an electric heating element, the temperature signal output end of the temperature measuring element is electrically connected to the temperature signal receiving end of the controller, and the control signal output end of the controller is electrically connected to the control end of the electric heating element.

[0014] In a preferred embodiment of the present invention, the hot isostatic pressing equipment body includes a cylindrical side wall portion and a disc-shaped bottom wall portion, the bottom wall portion is connected to the bottom of the side wall portion, and the plurality of temperature control portions are respectively evenly and continuously arranged on the side wall portion and the bottom wall portion.

[0015] In a preferred embodiment of the present invention, the extra-large-size hot isostatic pressing equipment also includes a fully enclosed multiple structure, and the fully enclosed multiple structure includes multiple layers of sealing covers that are sequentially arranged from the inside to the outside, and the sealing covers located on the inner side are arranged on the outer periphery of the hot isostatic pressing equipment body.

[0016] In a preferred embodiment of the present invention, the extra-large-size hot isostatic pressing equipment also includes a load-bearing cylinder and a pressure-bearing frame, the load-bearing cylinder has a accommodating cavity inside, the hot isostatic pressing equipment body is arranged in the accommodating cavity, and the pressure-bearing frame is arranged on the outside of the load-bearing cylinder.

[0017] In a preferred embodiment of the present invention, the hot isostatic pressing equipment body is a cylindrical structure, and the diameter of the hot isostatic pressing equipment body is 1.85m to 2.4m;

[0018] The plurality of temperature control parts are evenly and continuously arranged in the circumferential direction and the axial direction on the inner wall of the hot isostatic pressing equipment body.

[0019] In a preferred embodiment of the present invention, the ultrahigh pressure in the main body of the hot isostatic pressing equipment ranges from 100 MPa to 300 MPa; and / or the temperature in the main body of the hot isostatic pressing equipment ranges from 400°C to 2200°C.

[0020] The present invention provides a method for controlling the temperature uniformity of the entire thermal field, which is used to control the temperature uniformity of the above-mentioned extra-large-size hot isostatic pressing equipment. The method for controlling the temperature uniformity of the entire thermal field comprises the following steps:

[0021] Divide the main body of the hot isostatic pressing equipment into heating areas;

[0022] Setting the position and quantity of the temperature control parts according to the heating area;

[0023] According to the positions and temperatures of the different heating areas, materials are selected and temperature uniformity is checked for the different heating areas;

[0024] If the temperature uniformity does not meet the preset requirements, repeat the above steps.

[0025] In a preferred embodiment of the present invention, the heating area is divided into the hot isostatic pressing equipment body, and the heating area includes a side wall portion located on the side wall of the hot isostatic pressing equipment body and a bottom wall portion located on the bottom of the hot isostatic pressing equipment body;

[0026] The number of the temperature control parts located on the side wall is N', and the number of the temperature control parts located on the bottom wall is N", wherein the sum of N' and N" is equal to the total number N of the temperature control parts.

[0027] In a preferred embodiment of the present invention, a position located at N+(1 / 2) on the main body of the hot isostatic pressing equipment is used as a temperature measuring position, and a temperature measuring element is provided at the temperature measuring position.

[0028] In a preferred embodiment of the present invention, the material selection and temperature uniformity check of different heating areas are performed according to the positions and hot zone temperatures of different heating areas, including:

[0029] When the hot zone temperature is less than or equal to 1400° C., the temperature control part corresponding to the hot zone temperature is made of a metal material or a non-metal material; wherein the metal material includes a molybdenum-lanthanum alloy, and / or the non-metal material includes graphite or C / C material;

[0030] When the hot zone temperature is greater than 1400° C. and less than or equal to 2200° C., the temperature control part corresponding to the hot zone temperature is made of non-metallic material; wherein the non-metallic material includes graphite or C / C material.

[0031] In a preferred embodiment of the present invention, the material selection and temperature uniformity check of different heating areas are performed according to the positions and hot zone temperatures of different heating areas, including:

[0032] Establishing a three-dimensional model of the hot isostatic pressing equipment body according to the position and number of the temperature control parts set in the hot isostatic pressing equipment body;

[0033] Imaging the temperatures of the plurality of temperature control parts in the three-dimensional model of the hot isostatic pressing equipment body according to preset temperature data to form a visualized thermal field area;

[0034] Obtaining the actual temperature difference between any two of the temperature control parts, and comparing it with a preset standard temperature difference;

[0035] If the actual temperature difference is less than or equal to the standard temperature difference, the temperature uniformity requirement of the extra-large-size hot isostatic pressing equipment is met;

[0036] If the actual temperature difference is greater than the standard temperature difference, the temperature of at least one of the two temperature control parts is adjusted.

[0037] In a preferred embodiment of the present invention, in the thermal field area, the actual temperature difference between the two temperature control parts is displayed by different colors.

[0038] In a preferred embodiment of the present invention, the actual temperature of the corresponding temperature control part is detected by a temperature measuring element, and the actual temperatures of the two temperature control parts are subtracted to obtain the actual temperature difference.

[0039] As described above, the characteristics and advantages of the extra-large-size hot isostatic pressing equipment and the method for controlling the temperature uniformity of the entire thermal field of the present invention are:

[0040] A plurality of temperature control parts are arranged in the main body of the hot isostatic pressing equipment, and a plurality of heating zones with individually controllable temperatures are formed on the main body of the hot isostatic pressing equipment through the plurality of temperature control parts. A corresponding heating element is arranged in each heating zone (i.e., each temperature control part), and the temperature of the corresponding heating zone can be individually and zonedly regulated through the heating element. Thus, through the coordination of the plurality of heating elements, the overall temperature uniformity of the main body of the hot isostatic pressing equipment can be controlled, thereby ensuring the uniformity and temperature stability of the entire thermal field of the hot isostatic pressing equipment, satisfying the temperature uniformity control for extra-large-sized hot isostatic pressing equipment, and ensuring the quality of pressed workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention.

[0042] Figure 1 It is a structural schematic diagram of the extra-large-size hot isostatic pressing equipment of the present invention;

[0043] Figure 2 It is a schematic diagram of the position of the temperature measuring element in the extra-large-size hot isostatic pressing equipment of the present invention;

[0044] Figure 3 This is one of the flow charts of the method for controlling the global temperature uniformity of a thermal field according to the present invention;

[0045] Figure 4 This is the second flow chart of the method for controlling the global temperature uniformity of the thermal field of the present invention.

[0046] The accompanying drawings in the present invention are:

[0047] 1. Hot isostatic pressing equipment body; 101. Side wall;

[0048] 102. bottom wall portion; 2. temperature control portion;

[0049] 3. Temperature measuring element; 4. Sealing cover. DETAILED DESCRIPTION

[0050] The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the invention and are not used to limit the scope of the invention. After reading the invention, various equivalent forms of modifications to the invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0051] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0053] Implementation Method 1

[0054] like Figure 1 , Figure 2As shown, the present invention provides an extra-large-sized hot isostatic pressing equipment, which includes a hot isostatic pressing equipment body 1 and a plurality of heating elements (not shown), the hot isostatic pressing equipment body 1 has a plurality of temperature control parts 2 built in, so as to form a plurality of heating zones that can be individually temperature-controlled on the hot isostatic pressing equipment body 1; the number of heating elements is equal to the number of temperature control parts 2, the plurality of heating elements correspond to the plurality of temperature control parts 2 one by one, and the plurality of heating elements are respectively arranged in the corresponding temperature control parts 2, so that the temperature of the corresponding heating zone can be controlled by the heating elements; during operation, the plurality of heating elements cooperate with each other to control the overall temperature uniformity of the hot isostatic pressing equipment body.

[0055] In the present invention, a plurality of temperature control parts 2 are arranged on the inner wall of the main body 1 of the hot isostatic pressing equipment, and a plurality of heating zones with individually controllable temperatures are formed on the main body 1 of the hot isostatic pressing equipment through the plurality of temperature control parts 2. A corresponding heating element is arranged in each heating zone (i.e., each temperature control part 2), and the temperature of the corresponding heating zone can be individually and zonedly regulated through the heating element. Thus, through the coordination of the plurality of heating elements, the overall temperature uniformity of the main body 1 of the hot isostatic pressing equipment can be controlled, thereby ensuring the temperature uniformity and temperature stability of the entire thermal field of the hot isostatic pressing equipment, and satisfying the temperature uniformity control for extra-large-sized hot isostatic pressing equipment.

[0056] In an optional implementation of the present invention, Figure 1 As shown, the hot isostatic pressing equipment body 1 is a cylindrical structure, the diameter of the hot isostatic pressing equipment body 1 can be but not limited to 1.85m to 2.4m, and the height of the hot isostatic pressing equipment body 1 can be but not limited to 5m; multiple temperature control parts 2 can be arranged on the inner wall of the hot isostatic pressing equipment body 1, and the multiple temperature control parts 2 are evenly and continuously arranged along the circumference and axial direction of the hot isostatic pressing equipment body 1. Of course, multiple temperature control parts 2 can also be arranged at other positions inside the hot isostatic pressing equipment body 1, so that multiple heating zones can be formed inside the hot isostatic pressing equipment body 1 and the temperature can be regulated separately and in different zones.

[0057] Further, such as Figure 1As shown, the hot isostatic pressing equipment body 1 includes a side wall portion 101 and a bottom wall portion 102. The side wall portion 101 is a cylindrical structure with a top seal and a bottom opening. The bottom wall portion 102 is a disc-shaped structure. The bottom wall portion 102 is located at the bottom of the side wall portion 101 and is connected to the bottom of the side wall portion 101. A plurality of temperature control portions 2 are evenly and continuously arranged on the side wall portion 101 and the bottom wall portion 102, respectively, to ensure the overall temperature control capability of the hot isostatic pressing equipment body 1, and to ensure that the hot isostatic pressing equipment body 1 has good temperature uniformity and temperature stability as a whole. Among them, the number of temperature control portions 2 is 9-30, that is, the thermal field of the hot isostatic pressing equipment body 1 can be divided into 9-30 heating zones that can be individually temperature controlled. Of course, other numbers of temperature control portions 2 can also be set. The more the number of temperature control portions 2, the more precise the control of the temperature uniformity and temperature stability of the hot isostatic pressing equipment body 1, and the hot isostatic pressing equipment body 1 has better temperature uniformity and temperature stability.

[0058] In the present invention, when the number of the temperature control parts 2 is 9-30, the temperature difference at different positions of the hot isostatic pressing equipment body 1 as a whole is less than or equal to 3°C-5°C, which can meet the requirement of global temperature uniformity.

[0059] In an optional implementation of the present invention, Figure 1 , Figure 2 As shown, a temperature measuring element 3 is provided on the temperature control part 2, and the temperature of the corresponding temperature control part 2 can be detected in real time through the temperature measuring element 3, so that the temperature of the temperature control part 2 can be appropriately adjusted according to the detected temperature, thereby achieving the purpose of real-time temperature measurement.

[0060] Furthermore, the temperature measuring element 3 is arranged at the middle position of the temperature control part 2 or close to the middle position of the temperature control part 2 to improve the accuracy of temperature measurement. The temperature measuring element 3 may be, but is not limited to, a temperature sensor.

[0061] In an optional embodiment of the present invention, the heating element includes an electric heating element, the temperature signal output end of the temperature measuring element 3 is electrically connected to the temperature signal receiving end of the controller, and the control signal output end of the controller is electrically connected to the control end of the electric heating element. In the actual working process, the temperature of the temperature control part 2 is detected in real time by the temperature measuring element 3, and the collected temperature signal is sent to the controller, and the controller controls the electric heating element according to the received temperature signal to ensure that each temperature control part 2 reaches the preset temperature requirement.

[0062] In an optional implementation of the present invention, Figure 1 As shown, the extra-large-sized hot isostatic pressing equipment also includes a fully enclosed multiple structure, which includes a multi-layer sealing cover 4 that is sequentially arranged from the inside to the outside. The sealing cover 4 located on the inner side is arranged on the outer periphery of the hot isostatic pressing equipment body 1, and the hot isostatic pressing equipment body 1 is covered inside by the multi-layer sealing cover 4 to ensure the thermal field stability of the hot isostatic pressing equipment body 1.

[0063] Furthermore, the sealing cover 4 may be made of, but not limited to, graphite or alumina.

[0064] In the present invention, the ultrahigh pressure in the hot isostatic pressing equipment body 1 ranges from 100 MPa to 300 MPa.

[0065] In an optional implementation of the present invention, Figure 1 As shown, the extra-large-size hot isostatic pressing equipment also includes a bearing cylinder 5 and a pressure frame, the bearing cylinder 5 has a receiving cavity inside, the receiving cavity is adapted to the hot isostatic pressing equipment body 1, the hot isostatic pressing equipment body 1 is arranged in the receiving cavity, and the pressure frame is arranged outside the bearing cylinder 5, for supporting the bearing cylinder 5 and the hot isostatic pressing equipment body 1. In addition, the bearing cylinder 5 is used to bear an ultra-high pressure of 100MPa-300MPa.

[0066] In the present invention, the temperature in the hot isostatic pressing equipment body 1 ranges from 400°C to 2200°C.

[0067] The characteristics and advantages of the extra-large size hot isostatic pressing equipment of the present invention are:

[0068] The extra-large-sized hot isostatic pressing equipment forms a plurality of individually temperature-controllable heating zones on a main body 1 of the hot isostatic pressing equipment through a plurality of temperature control units 2. Each heating zone is provided with a corresponding heating element, and the temperature of the corresponding heating zone can be individually and zonedly regulated through the heating element. Thus, through the coordination of the plurality of heating elements, the overall temperature uniformity of the main body 1 of the hot isostatic pressing equipment can be controlled, thereby ensuring the temperature uniformity and temperature stability of the entire thermal field of the hot isostatic pressing equipment, satisfying the temperature uniformity control requirements of the extra-large-sized hot isostatic pressing equipment, and ensuring the quality of the pressed workpiece.

[0069] Implementation Method 2

[0070] like Figure 3 As shown, the present invention provides a method for controlling the temperature uniformity of the entire thermal field, which is used to control the temperature uniformity of the above-mentioned extra-large-size hot isostatic pressing equipment. The method for controlling the temperature uniformity of the entire thermal field comprises the following steps:

[0071] Step S1: dividing the hot isostatic pressing equipment body 1 into heating areas;

[0072] Step S2: setting the position and number of the temperature control part 2 according to the heating area;

[0073] Step S3: selecting materials and checking the temperature uniformity of different heating areas according to the positions and temperatures of different heating areas;

[0074] Step S4: If the temperature uniformity does not meet the preset requirements, repeat the above steps S2 to S3.

[0075] In an optional implementation of the present invention, in step S1, the hot isostatic pressing equipment body 1 is divided into heating areas, and the heating areas include a side wall portion 101 located on the side wall of the hot isostatic pressing equipment body 1 and a bottom wall portion 102 located at the bottom of the hot isostatic pressing equipment body 1; the number of the temperature control portions 2 located on the side wall portion 101 can be set to N', and the number of the temperature control portions 2 located on the bottom wall portion 102 can be set to N", wherein the sum of N' and N" is equal to the total number N of the temperature control portions 2. Wherein, N is equal to 9-30.

[0076] Furthermore, the position N+(1 / 2) on the hot isostatic pressing equipment body 1 is used as a temperature measurement position, and a temperature measurement element 3 is set at the temperature measurement position. Figure 2 As shown, a temperature measuring element 3 is arranged in the middle position of each temperature control part 2 in the vertical direction. The technical effects that can be achieved by this layout of the temperature measuring element 3 are: 1. Ensure the accuracy of temperature measurement and reduce errors: When measuring temperature, the edge position of the temperature control part 2 is often easily affected by the external environment (such as air flow, heat loss, etc.) or the adjacent temperature control part 2. These factors may cause errors in temperature detection, and selecting the middle position for measurement can relatively reduce the interference of these external factors, thereby improving the accuracy of measurement. 2. Stronger representativeness. The middle position is usually more representative of the average temperature of the entire temperature measurement area. Under high temperature and high pressure conditions, the gas density is close to that of water. When measuring the temperature of the liquid, the liquid in the middle layer flows relatively slowly and the temperature distribution is more uniform, so it can better reflect the real temperature of the flow field. 3. Easy to operate and easy to locate. The middle position is usually easier to find and locate. Especially in some complex temperature measurement environments, selecting the middle position for measurement can simplify the operation process and improve work efficiency. 4. Comply with standards or specifications. In some specific temperature measurement scenarios, such as industrial production, laboratory research, etc., some temperature measurement standards and specifications may be formulated. These standards and specifications may require the selection of a specific temperature measurement position (such as the middle position) to ensure the accuracy and consistency of the measurement.

[0077] In an optional implementation of the present invention, in step S3, materials are selected and temperature uniformity is checked for different heating areas according to the positions and hot zone temperatures of different heating areas. The material selection for different heating areas includes:

[0078] When the hot zone temperature is less than or equal to 1400°C, the temperature control part 2 corresponding to the hot zone temperature is made of metal material or non-metal material; wherein the metal material includes molybdenum-lanthanum alloy, and / or the non-metal material includes graphite or C / C material (i.e., carbon / carbon composite material, which is a carbon-based composite material with carbon fiber or graphite fiber as reinforcement, and its full carbon structure not only retains the excellent mechanical properties and flexible structural designability of fiber-reinforced materials, but also has many advantages of carbon materials, such as low density, low thermal expansion coefficient, high thermal conductivity and electrical conductivity, excellent thermal shock resistance, ablation resistance and friction resistance, etc., and more importantly, the mechanical properties of the material increase instead of decrease with increasing temperature, making it an ideal structural material in the fields of aerospace, automobile, medicine, etc.);

[0079] When the hot zone temperature is greater than 1400° C. and less than or equal to 2200° C., the temperature control part 2 corresponding to the hot zone temperature is made of non-metallic material; wherein the non-metallic material includes graphite or C / C material.

[0080] In an optional implementation of the present invention, Figure 4 As shown, step S3 selects materials and checks the temperature uniformity of different heating areas according to the positions and temperatures of different heating areas. Checking the temperature uniformity of different heating areas includes:

[0081] Step S301: establishing a three-dimensional model of the hot isostatic pressing equipment body 1 according to the shape, size and other data of the hot isostatic pressing equipment body 1, and the position and number of the temperature control parts 2 set in the hot isostatic pressing equipment body 1;

[0082] Step S302: imaging the temperatures of the plurality of temperature control parts 2 in the three-dimensional model of the hot isostatic pressing equipment body 1 according to the preset temperature data to form a visualized thermal field area;

[0083] Step S303: obtaining the actual temperature difference between any two temperature control parts 2, and comparing it with the preset standard temperature difference;

[0084] In the thermal field area, the actual temperature difference between the two temperature control parts 2 is displayed in different colors (e.g., the color corresponding to the temperature from high to low gradually becomes lighter; or high temperature is represented by red, low temperature is represented by green, and the temperature change process from high temperature to low temperature gradually transitions from red to green). When selecting two temperature control parts 2 from multiple temperature control parts 2, two temperature control parts 2 with a large color difference can be preferentially selected to obtain the actual temperature difference. If the actual temperature difference with a large difference meets the temperature uniformity requirement of the extra-large-sized hot isostatic pressing equipment, then other actual temperature differences with a smaller difference can naturally also meet the temperature uniformity requirement of the extra-large-sized hot isostatic pressing equipment.

[0085] Furthermore, the actual temperature of the corresponding temperature control part 2 is detected by the temperature measuring elements 3 arranged on different temperature control parts 2, and the actual temperatures of the two temperature control parts 2 are subtracted to obtain the actual temperature difference.

[0086] Step S304: If the actual temperature difference is less than or equal to the standard temperature difference, the temperature uniformity requirement of the extra-large hot isostatic pressing equipment is met; if the actual temperature difference is greater than the standard temperature difference, the temperature of at least one of the two temperature control parts 2 is adjusted. The standard temperature difference range can be set to be less than or equal to 3°C-5°C. If the actual temperature difference is within this range, the global temperature uniformity requirement of the extra-large hot isostatic pressing equipment can be met.

[0087] The method for controlling the global temperature uniformity of the thermal field of the present invention can realize the zoning control of the global temperature of the hot isostatic pressing equipment, ensure the uniformity and temperature stability of the global temperature of the thermal field of the hot isostatic pressing equipment, and meet the temperature control requirements for extra-large-sized hot isostatic pressing equipment.

[0088] The method for controlling the global temperature uniformity of the thermal field of the present invention has the same characteristics and advantages as those of the above-mentioned extra-large-size hot isostatic pressing equipment, which will not be described in detail here.

[0089] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no order of precedence between the two, and they cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0090] The above-mentioned various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other. Each embodiment focuses on the differences from other embodiments.

[0091] The above are only a few embodiments of the present invention. Although the embodiments disclosed by the present invention are as above, the contents are only embodiments adopted for facilitating the understanding of the present invention and are not used to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modification and change in the form and details of the embodiments without departing from the spirit and scope disclosed by the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined by the attached claims.

Claims

1. A method for controlling the temperature uniformity of the entire thermal field of an extra-large hot isostatic pressing equipment, characterized in that: The extra-large size hot isostatic pressing equipment includes: A hot isostatic pressing equipment body, wherein the hot isostatic pressing equipment body has a plurality of temperature control parts built therein, so as to form a plurality of heating zones on the hot isostatic pressing equipment body that can be individually temperature-controlled; The hot isostatic pressing equipment body comprises a cylindrical side wall portion and a disc-shaped bottom wall portion, wherein the bottom wall portion is connected to the bottom of the side wall portion, and a plurality of temperature control portions are respectively and evenly and continuously arranged on the side wall portion and the bottom wall portion to ensure the overall temperature control capability of the hot isostatic pressing equipment body; A plurality of heating elements, each of which corresponds to the plurality of temperature control parts, and each of which is disposed in a corresponding temperature control part to control the temperature of the corresponding heating area; The plurality of heating elements cooperate with each other to control the overall temperature uniformity of the main body of the hot isostatic pressing equipment; The method for controlling the global temperature uniformity of a thermal field comprises the following steps: Step S1: dividing the hot isostatic pressing equipment body into heating areas; Step S2: setting the position and number of the temperature control parts according to the heating area; Step S3: selecting materials and checking the temperature uniformity of different heating areas according to the positions and temperatures of the different heating areas; Step S301: establishing a three-dimensional model of the hot isostatic pressing equipment body according to the position and number of the temperature control parts set in the hot isostatic pressing equipment body; Step S302: imaging the temperatures of the plurality of temperature control parts in the three-dimensional model of the hot isostatic pressing equipment body according to preset temperature data to form a visualized thermal field area; Wherein, in the thermal field area, the actual temperature difference between the two temperature control parts is displayed by different colors, and the color corresponding to the temperature of each temperature control part in the thermal field area changes gradually from high to low; Step S303: obtaining the actual temperature difference between any two temperature control parts, and comparing it with the preset standard temperature difference; Wherein, two temperature control parts with a large color difference are selected to obtain the actual temperature difference, and compared with the preset standard temperature difference; Step S304: if the actual temperature difference is less than or equal to the standard temperature difference, the temperature uniformity requirement of the extra-large-size hot isostatic pressing equipment is met; if the actual temperature difference is greater than the standard temperature difference, the temperature of at least one of the two temperature control parts is adjusted; If the actual temperature difference with a larger difference meets the temperature uniformity requirement of the extra-large hot isostatic pressing equipment, then the other actual temperature differences with a smaller difference also meet the temperature uniformity requirement of the extra-large hot isostatic pressing equipment; Step S4: If the temperature uniformity does not meet the preset requirements, repeat the above steps.

2. The method for controlling the global temperature uniformity of the thermal field of the extra-large-size hot isostatic pressing equipment according to claim 1, characterized in that: The temperature control part is provided with a temperature measuring element, and the temperature measuring element is used to detect the temperature of the corresponding temperature control part.

3. The method for controlling the global temperature uniformity of the thermal field of the super-large-size hot isostatic pressing equipment according to claim 2, characterized in that: The heating element comprises an electric heating element, the temperature signal output end of the temperature measuring element is electrically connected to the temperature signal receiving end of the controller, and the control signal output end of the controller is electrically connected to the control end of the electric heating element.

4. The method for controlling the global temperature uniformity of the thermal field of the extra-large-size hot isostatic pressing equipment according to claim 1, characterized in that: The extra-large-size hot isostatic pressing equipment also includes a fully enclosed multiple structure, which includes multiple layers of sealing covers that are sequentially arranged from the inside to the outside, and the sealing covers located on the inner side are arranged on the outer periphery of the hot isostatic pressing equipment body.

5. The method for controlling the global temperature uniformity of the thermal field of an extra-large-size hot isostatic pressing equipment according to any one of claims 1 to 4, characterized in that: The extra-large-size hot isostatic pressing equipment also includes a load-bearing cylinder and a pressure-bearing frame. The load-bearing cylinder has a containing cavity inside, the hot isostatic pressing equipment body is arranged in the containing cavity, and the pressure-bearing frame is arranged on the outside of the load-bearing cylinder.

6. The method for controlling the global temperature uniformity of the thermal field of the super-large-size hot isostatic pressing equipment according to claim 1, characterized in that: The hot isostatic pressing equipment body is a cylindrical structure, and the diameter of the hot isostatic pressing equipment body is 1.85m to 2.4m; The plurality of temperature control parts are evenly and continuously arranged along the circumferential direction and the axial direction on the inner wall of the hot isostatic pressing equipment body.

7. The method for controlling the global temperature uniformity of the thermal field of the super-large-size hot isostatic pressing equipment according to claim 1, characterized in that: The pressure in the main body of the hot isostatic pressing equipment ranges from 100 MPa to 300 MPa; and / or the temperature in the main body of the hot isostatic pressing equipment ranges from 400° C. to 2200° C.

8. The method for controlling the global temperature uniformity of the thermal field of the super-large-size hot isostatic pressing equipment according to claim 1, characterized in that: The hot isostatic pressing equipment body is divided into heating areas, wherein the heating areas include a side wall portion located on a side wall of the hot isostatic pressing equipment body and a bottom wall portion located on a bottom of the hot isostatic pressing equipment body; The number of the temperature control parts located on the side wall is N', and the number of the temperature control parts located on the bottom wall is N", wherein the sum of N' and N" is equal to the total number N of the temperature control parts.

9. The method for controlling the global temperature uniformity of the thermal field of the super-large-size hot isostatic pressing equipment according to claim 8, characterized in that: A temperature measuring element is arranged on the main body of the hot isostatic pressing equipment and at a vertically middle position of each of the temperature control parts.

10. The method for controlling the global temperature uniformity of the thermal field of the super-large-size hot isostatic pressing equipment according to claim 1, characterized in that: The material selection and temperature uniformity check of different heating areas according to the positions and hot zone temperatures of different heating areas include: When the hot zone temperature is less than or equal to 1400° C., the temperature control part corresponding to the hot zone temperature is made of a metal material or a non-metal material; wherein the metal material includes a molybdenum-lanthanum alloy, and / or the non-metal material includes graphite or C / C material; When the hot zone temperature is greater than 1400° C. and less than or equal to 2200° C., the temperature control part corresponding to the hot zone temperature is made of non-metallic material; wherein the non-metallic material includes graphite or C / C material.

11. The method for controlling the temperature uniformity of the entire thermal field of the super-large-size hot isostatic pressing equipment according to claim 2, characterized in that: The actual temperature of the corresponding temperature control part is detected by a temperature measuring element, and the actual temperatures of the two temperature control parts are subtracted to obtain the actual temperature difference.

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