Heat treatment method of GH2696 sealing ring
By adopting stress annealing and second-stage aging treatment methods during the heat treatment of the GH2696 sealing ring, combined with the slow cooling method, the problem of excessive hardness of the GH2696 sealing ring is solved, which improves processing efficiency and reduces costs.
Patent Information
- Application Number
- CN202411673808.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-02-28
AI Technical Summary
During the heat treatment process, the GH2696 sealing ring has a high hardness, which leads to difficult subsequent processing and fast tool wear, which increases processing costs and reduces production efficiency.
The heat treatment method of stress annealing and second-stage aging treatment is adopted to adjust the second-stage aging temperature and insulation time of the GH2696 sealing ring, combined with the slow cooling method, release the stress inside the alloy and reduce the final tissue hardness.
By adjusting the heat treatment parameters, the final tissue hardness of the GH2696 sealing ring is reduced, the efficiency of subsequent processing is improved, the process requirements are met, and subsequent processing is facilitated.
Smart Images
Figure CN119530518A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a field, and in particular, to a heat treatment method for a GH2696 sealing ring. Background Art
[0002] GH2696 is an iron-nickel-chromium-based high-temperature alloy with excellent high-temperature strength, oxidation resistance and corrosion resistance. It is widely used in aerospace, petrochemical and other fields. However, during the heat treatment process, GH2696 often has a high hardness, which may lead to difficulties in subsequent processing such as cutting and drilling, rapid tool wear, etc., increased processing costs, and reduced production efficiency, limiting its application in the production of aviation parts expansion rings that require high processing accuracy and cost. Summary of the invention
[0003] In view of this, the present application provides a heat treatment method for a GH2696 sealing ring, which solves the problems in the prior art, reduces the hardness of the GH2696 sealing ring, and improves subsequent processing efficiency.
[0004] The present application provides a heat treatment method for a GH2696 sealing ring using the following technical solution:
[0005] A heat treatment method for a GH2696 sealing ring, comprising stress relief annealing and two-stage aging treatment;
[0006] The second-stage aging treatment step is to heat the sealing ring to 600-620°C and then keep it warm.
[0007] Optionally, the heat preservation time during the second aging treatment is 10-16 hours.
[0008] Optionally, the sealing ring is heated to 600° C. during the second aging treatment.
[0009] Optionally, the heat preservation time during the second aging treatment is 10 hours.
[0010] Optionally, during the second-stage aging treatment, after the heat preservation is completed, the sealing ring is cooled along with the furnace.
[0011] Optionally, the stress relief annealing step is to heat the solid solution state material from room temperature to 580-600° C., keep it at this temperature for 2-3 hours, and then air cool it to room temperature.
[0012] Optionally, stress relief annealing heats the solid solution state material from room temperature to 600°C, with a heating rate of 10-15 degrees Celsius per minute during the heating process.
[0013] In summary, this application includes the following beneficial technical effects:
[0014] This application reduces the final microstructure hardness by adjusting the second-stage aging temperature and holding time of the GH2696 sealing ring. The original process parameters used air cooling after aging, and now it is changed to slow cooling after aging. Slow cooling can better release the stress inside the alloy and reduce the increase in hardness caused by thermal stress. When furnace cooling, the alloy cools down at a very slow rate, which can give atoms more time to adjust their positions and form a relatively soft microstructure, so that the final part sample aging hardness is HB363, which meets the process requirements and is convenient for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 This is a flow chart of the heat treatment method of the GH2696 sealing ring of the present application. DETAILED DESCRIPTION
[0017] The embodiments of the present application are described in detail below with reference to the accompanying drawings.
[0018] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.
[0019] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.
[0020] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.
[0021] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.
[0022] An embodiment of the present application provides a heat treatment method for a GH2696 sealing ring.
[0023] like Figure 1 As shown, a heat treatment method for a GH2696 sealing ring includes stress relief annealing and two-stage aging treatment.
[0024] The stress relief annealing step is to heat the solid solution state material from room temperature to 580-600°C, keep it at this temperature for 2-3 hours and then air cool it to room temperature. Specifically, the stress relief annealing heats the solid solution state material from room temperature to 600°C, and the heating rate during the heating process is 10-15 degrees Celsius per minute.
[0025] The second stage aging treatment step is to heat the sealing ring to 600-620°C and then keep it warm. After the insulation is completed, the sealing ring is cooled with the furnace. Cooling with the furnace means turning off the power of the heating furnace and opening the furnace door of the heating furnace a gap. The specific size of the furnace door opening can be 30% of the furnace door opening to the fully open state of the heating furnace.
[0026] In one embodiment, the sealing ring is heated to 600° C. during the second aging treatment, and the holding time during the second aging treatment is 10 hours.
[0027] The present application reduces the final tissue hardness by adjusting the second-stage aging temperature and the heat preservation time of the GH2696 sealing ring.
[0028] The original process parameters used air cooling after aging, but now it is changed to slow cooling after aging. Slow cooling can better release the stress inside the alloy and reduce the hardness increase caused by thermal stress. When furnace cooling, the alloy cools down at a very slow rate, which can give atoms more time to adjust their positions and form a relatively soft organizational structure, so that the final part sample aging hardness is HB363, which meets the process requirements.
[0029] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.
Claims
1. A heat treatment method for a GH2696 sealing ring, characterized in that: Including stress relief annealing and two-stage aging treatment; The second-stage aging treatment step is to heat the sealing ring to 600-620°C and then keep it warm.
2. The heat treatment method of the GH2696 sealing ring according to claim 1, characterized in that: The insulation time during the second aging treatment is 10-16 hours.
3. The heat treatment method of the GH2696 sealing ring according to claim 2, characterized in that: During the second stage aging treatment, the sealing ring is heated to 600°C.
4. The heat treatment method of the GH2696 sealing ring according to claim 3 is characterized in that: The holding time during the second aging treatment is 10 hours.
5. The heat treatment method of the GH2696 sealing ring according to claim 4, characterized in that: During the second stage aging treatment, after the insulation is completed, the sealing ring is cooled with the furnace.
6. The heat treatment method of the GH2696 sealing ring according to claim 1, characterized in that: The stress relief annealing step is to heat the solid solution state material from room temperature to 580-600°C, keep it at this temperature for 2-3 hours, and then air cool it to room temperature.
7. The heat treatment method of the GH2696 sealing ring according to claim 6, characterized in that: Stress relief annealing heats the solid solution material from room temperature to 600°C, with a heating rate of 10-15°C per minute.