Composite heat treatment method for metal elbow production

Abstract

The invention relates to the technical field of composite heat treatment for metal elbow production, and provides a composite heat treatment method for metal elbow production, which comprises the following accurate steps of: carrying out primary heating by using a plurality of groups of distributed heating elements; the heated metal elbow is rapidly cooled; the metal elbow is transferred to another specific heating area for secondary heating; the metal elbow subjected to secondary heating is subjected to sectional type slow cooling treatment; in the processes of primary heating, secondary heating and cooling, the strain condition of the metal elbow is monitored in real time through a plurality of strain sensors installed on the metal elbow; ultrasonic vibration assistance is introduced in the secondary heating process; in the second-stage cooling process, specific nanoparticles are added into the cooling medium; the cooling medium is recycled; a monitoring camera is used for recording the whole heat treatment process in real time; and carrying out performance detection on the metal elbow subjected to heat treatment. The method effectively improves the comprehensive performance and quality of the metal elbow, and has important application value.

Description

Technical Field

[0001] The present invention relates to the technical field of composite heat treatment for the production of metal elbows, and particularly to a method for composite heat treatment of metal elbows in production. Background Art

[0002] In modern industry, as an important component in the pipeline system, the performance and quality of metal elbows directly affect the operating efficiency and safety of the entire system. Traditional heat treatment methods for metal elbows often have some problems. For example, uneven heating leads to internal stress concentration, inaccurate control of the cooling process affects mechanical properties, and there is a lack of effective monitoring and adjustment means. These problems not only reduce the service life and reliability of metal elbows but may also pose safety hazards in practical applications.

[0003] With the continuous development of industrial technology, the performance requirements for metal elbows are getting higher and higher, and traditional heat treatment methods are difficult to meet the market demand. To improve the quality and performance of metal elbows, a more advanced, precise, and effective composite heat treatment method needs to be developed. This method should be able to achieve uniform heating and cooling, precisely control various parameters during the heat treatment process, and be flexibly adjusted according to different materials and specifications. At the same time, effective monitoring and detection means are also required to ensure that the product quality meets the requirements.

[0004] Therefore, this solution specifically proposes a method for composite heat treatment of metal elbows in production to solve the above problems. Summary of the Invention

[0005] To overcome the defects of the prior art, the purpose of the present invention is to provide a method for composite heat treatment of metal elbows in production.

[0006] To achieve the above object, the technical solution of the present invention is realized as follows: A method for composite heat treatment of metal elbows in production includes the following precise steps:

[0007] Place the metal elbow in a specially designed heating chamber, and use multiple groups of distributed heating elements for preliminary heating. Heat it up to 800°C at a heating rate of 5°C per minute, and hold it at this temperature for 3 hours. During the heating process, monitor the temperature difference of each part in real time to ensure that the difference does not exceed 10°C;

[0008] Use a mixed cooling medium composed of 80% water and 20% oil to quickly cool the heated metal elbow. During the cooling process, precisely control the cooling rate between 20°C and 30°C per minute through an intelligent control system;

[0009] Transfer the cooled metal elbow to another specific heating area for secondary heating. This heating uses induction heating, and the temperature is raised to 1000°C at a rate of 8°C per minute. At the same time, an alternating magnetic field with a frequency of 50 Hz and an intensity of 2 Tesla is turned on, and the intensity of this alternating magnetic field changes periodically with time. Keep it at a constant temperature for 4 hours.

[0010] Perform a segmented slow cooling treatment on the metal elbow after secondary heating. The cooling process is divided into three segments. The first segment cools from 1000°C to 600°C at a rate of 15°C per minute for 2 hours. The second segment cools from 600°C to 300°C at a rate of 10°C per minute for 3 hours. The third segment cools from 300°C to room temperature at a rate of 5°C per minute for 4 hours.

[0011] During the preliminary heating, secondary heating, and cooling processes, the strain conditions of the metal elbow are monitored in real time through multiple strain sensors installed on the metal elbow, and the heating and cooling parameters are adjusted according to the strain data.

[0012] Ultrasonic vibration assistance is introduced during the secondary heating process. The frequency of the ultrasonic vibration is 20 kHz, and the intensity is 10 W / cm 2 , and the ultrasonic vibration cooperates with the alternating magnetic field to produce a synergistic effect.

[0013] During the second-stage cooling process of the segmented slow cooling treatment, specific nanoparticles are added to the cooling medium to improve the cooling effect and the performance of the metal elbow. The nanoparticles are nano-aluminum oxide, and the addition amount is 0.5% of the mass of the cooling medium.

[0014] The cooling medium is recycled, and a filtering and purification device is set up during the recycling process to ensure the purity of the cooling medium. The filtering and purification device adopts a three-stage filtering structure, namely coarse filtering, fine filtering, and ultrafiltration.

[0015] During the entire heat treatment process, a monitoring camera is used to record the entire process of heat treatment in real time for subsequent analysis and traceability. The monitoring camera has high-definition and night vision functions, and the resolution is 1080P.

[0016] Perform performance testing on the metal elbow after heat treatment, including indicators such as strength, toughness, and hardness, to ensure that the preset performance standards are met. A universal material testing machine is used for strength and toughness testing, and a Rockwell hardness tester is used for hardness testing.

[0017] Preferably, the layout and power distribution of the distributed heating elements are optimized. The heating elements are evenly distributed in a ring shape, and the power is adjusted according to the size of the heating chamber and the size of the metal elbow.

[0018] Preferably, the intelligent control system automatically adjusts the flow rate and temperature of the cooling medium according to the real-time monitoring data. The flow rate adjustment range is from 10 L / min to 50 L / min, and the temperature adjustment range is from 20 °C to 80 °C.

[0019] Preferably, the ultrasonic vibration and the alternating magnetic field cooperate with each other to produce a synergistic effect and improve the performance of the metal elbow.

[0020] Preferably, the nanoparticles are nanomaterials with specific performance enhancement effects. Nano-aluminum oxide can improve the wear resistance and corrosion resistance of the metal elbow.

[0021] Preferably, the filtration and purification device adopts a multi-stage filtration structure, which can effectively remove impurities and pollutants in the cooling medium and ensure the purity and stability of the cooling medium.

[0022] Preferably, the monitoring camera has high-definition and night vision functions, can clearly record various situations during the heat treatment process, and provides strong support for subsequent analysis and improvement.

[0023] Preferably, a variety of advanced detection equipment and methods are used for performance detection, which can comprehensively and accurately evaluate the performance of the metal elbow and ensure that the product quality meets the requirements.

[0024] Preferably, according to different types of metal elbows, specific heat treatment parameters such as heating temperature, holding time, cooling rate, etc. can be adjusted to meet the heat treatment requirements of metal elbows with different materials and specifications.

[0025] Preferably, this method is applicable to the production of elbows made of various metal materials, such as carbon steel, stainless steel, alloy steel, etc.

[0026] The beneficial effects of the present invention are as follows:

[0027] First, by precisely controlling the heating-up curve and temperature holding time of the preliminary heating, as well as real-time monitoring of the temperature difference, the metal elbow is ensured to be evenly heated, effectively reducing internal stress and tissue inhomogeneity.

[0028] Second, by using a mixed cooling medium with a specific ratio and precisely controlling the cooling rate, rapid and uniform cooling is achieved, which helps to improve the mechanical properties of the metal elbow.

[0029] Furthermore, induction heating in the secondary heating combines alternating magnetic fields and ultrasonic vibrations, which significantly improves the performance of metal elbows under their synergistic action, such as strength, toughness, etc. The segmented slow cooling treatment further optimizes the cooling process, and the rate control in different stages is beneficial to obtaining ideal organizational structures and properties. Adding nano-aluminum oxide particles improves the cooling effect and the wear resistance and corrosion resistance of metal elbows. Real-time strain monitoring and parameter adjustment ensure the accuracy and adaptability of the heat treatment process, can effectively handle different situations, and ensure product quality. The recycling of the cooling medium and the multi-stage filtration and purification device ensure the purity and stability of the cooling medium, reduce costs and are environmentally friendly. The use of monitoring cameras facilitates the recording and traceability of the whole process, providing a strong basis for subsequent analysis and improvement. The performance detection means are comprehensive and accurate, and can strictly control the quality of metal elbows. The heat treatment parameters can be flexibly adjusted according to different types of metal elbows, meeting the requirements of various materials and specifications, and broadening the scope of application.

[0030] In summary, this method effectively improves the comprehensive performance and quality of metal elbows, and has important application value and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In the drawings:

[0032] Figure 1 is a flowchart of the processing method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will further describe the present invention in detail with reference to the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all of the embodiments. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Based on the embodiments of the invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the invention.

[0034] In addition, "a plurality of" means two or more. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the invention.

[0035] Please refer to the accompanying Figure 1 drawings, and the present invention provides a specific implementation manner of a composite heat treatment method for metal elbow production

[0036] This embodiment provides a composite heat treatment method for metal elbow production, and this method includes the following steps:

[0037] Preliminary heating:

[0038] Place the metal elbow in a specially designed heating chamber, which is equipped with multiple groups of distributed heating elements. These heating elements are evenly distributed in a circular pattern, and their power has been optimized according to the size of the heating chamber and the dimensions of the metal elbow.

[0039] Heat the metal elbow to 800 °C at a heating rate of 5 °C per minute. During the heating process, monitor the temperature difference at each part in real time to ensure that the difference does not exceed 10 °C. After the temperature reaches 800 °C, maintain this temperature for 3 hours.

[0040] Rapid cooling:

[0041] Use a mixed cooling medium composed of 80% water and 20% oil to rapidly cool the heated metal elbow.

[0042] During the cooling process, the intelligent control system automatically adjusts the flow rate and temperature of the cooling medium according to the real-time monitoring data. The flow rate adjustment range is from 10 L / min to 50 L / min, and the temperature adjustment range is from 20 °C to 80 °C, precisely controlling the cooling rate between 20 °C and 30 °C per minute.

[0043] Secondary heating:

[0044] Transfer the cooled metal elbow to another specific heating area and perform secondary heating using induction heating. Heat it to 1000 °C at a rate of 8 °C per minute.

[0045] During the heating-up process, simultaneously turn on an alternating magnetic field with a frequency of 50 Hz and an intensity of 2 Tesla, and the intensity of this alternating magnetic field changes periodically with time. Keep it at a constant temperature for 4 hours. During the secondary heating process, introduce ultrasonic vibration assistance. The frequency of the ultrasonic vibration is 20 kHz, and the intensity is 10 W / cm 2 , and the ultrasonic vibration and the alternating magnetic field cooperate with each other to produce a synergistic effect to improve the performance of the metal elbow.

[0046] Step-by-step slow cooling treatment:

[0047] Perform step-by-step slow cooling treatment on the metal elbow after secondary heating. The cooling process is divided into three stages:

[0048] The first stage cools from 1000 °C to 600 °C at a rate of 15 °C per minute for 2 hours.

[0049] The second stage cools from 600 °C to 300 °C at a rate of 10 °C per minute for 3 hours. During this stage of cooling, add specific nanoparticles to the cooling medium. The nanoparticles are nano-aluminum oxide, and the addition amount is 0.5% of the mass of the cooling medium to improve the cooling effect and the performance of the metal elbow.

[0050] The third stage is cooled from 300 °C to room temperature at a rate of 5 °C per minute for 4 hours.

[0051] Real-time monitoring and adjustment:

[0052] During the preliminary heating, secondary heating and cooling processes, the strain of the metal elbow is monitored in real time through multiple strain sensors installed on the metal elbow. According to the strain data, the heating and cooling parameters are adjusted to ensure the quality and performance of the metal elbow.

[0053] Cooling medium treatment:

[0054] The cooling medium is recycled, and a filtering and purification device is set during the recycling process. The device adopts a three-stage filtering structure, namely coarse filtering, fine filtering and ultrafiltration, which can effectively remove impurities and pollutants in the cooling medium and ensure the purity and stability of the cooling medium.

[0055] Process record:

[0056] During the whole heat treatment process, a monitoring camera with high definition and night vision functions and a resolution of 1080P is used to record the whole process of heat treatment in real time for subsequent analysis and traceability.

[0057] Performance detection:

[0058] The performance of the heat-treated metal elbow is detected, including indexes such as strength, toughness and hardness. A universal material testing machine is used for strength and toughness detection, and a Rockwell hardness tester is used for hardness detection to ensure that the preset performance standards are met.

[0059] Parameter adjustment:

[0060] According to different types of metal elbows, the specific heat treatment parameters, such as heating temperature, holding time, cooling rate, etc., can be adjusted to meet the heat treatment requirements of metal elbows with different materials and specifications.

[0061] Scope of application:

[0062] This method is applicable to the production of elbows made of various metal materials, such as carbon steel, stainless steel, alloy steel, etc.

[0063]

[0064]

[0065] Table 1: A table showing that this composite heat treatment method has higher accuracy and controllability than traditional heat treatment methods in aspects such as heating, cooling, secondary heating and performance detection.

[0066]

[0067]

[0068] Table 2: Differences in different performance indicators under the present processing method and the traditional processing method.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0070] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be regarded as limiting the claimed invention.

[0071] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A composite heat treatment method for producing metal elbows, characterized in that: It involves the following precise steps: The metal elbow is placed in a special heating chamber and preliminarily heated using multiple sets of distributed heating elements. The temperature is raised to 800°C at a heating curve of 5°C per minute and kept at this temperature for 3 hours. During the heating process, the temperature difference of each part is monitored in real time to ensure that the difference does not exceed 10°C. A mixed cooling medium consisting of 80% water and 20% oil is used to quickly cool the heated metal elbow. During the cooling process, the intelligent control system accurately controls the cooling rate between 20°C and 30°C per minute. The cooled metal elbow is transferred to another specific heating area for secondary heating. This heating adopts induction heating, and the temperature is raised to 1000°C at a rate of 8°C per minute. At the same time, an alternating magnetic field with a frequency of 50Hz and an intensity of 2 Tesla is turned on, and the intensity of the alternating magnetic field changes periodically with time, and the temperature is kept for 4 hours; The metal elbow after secondary heating is subjected to a segmented slow cooling treatment. The cooling process is divided into three stages. The first stage is cooling from 1000°C to 600°C at a rate of 15°C per minute for 2 hours; the second stage is cooling from 600°C to 300°C at a rate of 10°C per minute for 3 hours; the third stage is cooling from 300°C to room temperature at a rate of 5°C per minute for 4 hours. During the initial heating, secondary heating and cooling processes, multiple strain sensors installed on the metal elbow are used to monitor the strain of the metal elbow in real time, and the heating and cooling parameters are adjusted according to the strain data; Ultrasonic vibration was introduced to assist in the secondary heating process. The frequency of ultrasonic vibration was 20kHz and the intensity was 10W / cm 2 , ultrasonic vibration and alternating magnetic field cooperate with each other to produce a synergistic effect; In the second cooling process of the segmented slow cooling treatment, specific nanoparticles are added to the cooling medium to improve the cooling effect and the performance of the metal elbow. The nanoparticles are nanoalumina, and the addition amount is 0.5% of the mass of the cooling medium. The cooling medium is circulated, and a filtering and purifying device is set during the circulation process to ensure the purity of the cooling medium. The filtering and purifying device adopts a three-stage filtration structure, namely coarse filtration, fine filtration and ultrafiltration; During the entire heat treatment process, a surveillance camera is used to record the entire process of heat treatment in real time for subsequent analysis and tracing. The surveillance camera has high-definition and night vision functions with a resolution of 1080P; The performance of the heat-treated metal elbows is tested, including strength, toughness, hardness and other indicators, to ensure that the preset performance standards are met. A universal material testing machine is used for strength and toughness testing, and a Rockwell hardness tester is used for hardness testing.

2. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: The layout and power distribution of the distributed heating elements are optimized, the heating elements are evenly distributed in a ring shape, and the power is adjusted according to the size of the heating chamber and the size of the metal elbow.

3. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: The intelligent control system automatically adjusts the flow rate and temperature of the cooling medium according to real-time monitoring data, with the flow rate adjustment range being 10L / min to 50L / min and the temperature adjustment range being 20°C to 80°C.

4. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: Ultrasonic vibration and alternating magnetic field cooperate with each other to produce a synergistic effect and improve the performance of the metal elbow.

5. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: The nanoparticles are nanomaterials with a specific performance enhancement effect, and nano alumina can improve the wear resistance and corrosion resistance of the metal elbow.

6. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: The filtering and purifying device adopts a multi-stage filtering structure, which can effectively remove impurities and pollutants in the cooling medium and ensure the purity and stability of the cooling medium.

7. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: The monitoring camera has high-definition and night vision functions, and can clearly record various situations in the heat treatment process, providing strong support for subsequent analysis and improvement.

8. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: The performance test adopts a variety of advanced testing equipment and methods, which can comprehensively and accurately evaluate the performance of the metal elbow and ensure that the product quality meets the requirements.

9. A composite heat treatment method for producing a metal elbow according to claim 1, characterized in that: According to different types of metal elbows, specific heat treatment parameters such as heating temperature, holding time, cooling rate, etc. can be adjusted to meet the heat treatment requirements of metal elbows of different materials and specifications.

10. The composite heat treatment method for producing a metal elbow according to any one of claims 1 to 9, characterized in that: This method is suitable for the production of elbows made of various metal materials, such as carbon steel, stainless steel, alloy steel, etc.

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