CN116144911A - Method for eliminating residual stress of welding piece - Google Patents
Method for eliminating residual stress of welding piece Download PDFInfo
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- CN116144911A CN116144911A CN202310056888.XA CN202310056888A CN116144911A CN 116144911 A CN116144911 A CN 116144911A CN 202310056888 A CN202310056888 A CN 202310056888A CN 116144911 A CN116144911 A CN 116144911A
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- 238000003466 welding Methods 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title claims abstract description 45
- 230000035882 stress Effects 0.000 claims abstract description 68
- 230000032683 aging Effects 0.000 claims abstract description 61
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000007788 liquid Substances 0.000 claims description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
- C21D9/505—Cooling thereof
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/02—Hardening by precipitation
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/04—Hardening by cooling below 0 degrees Celsius
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention relates to the technical field of welding, and provides a method for eliminating residual stress of a welding piece, which comprises the following steps: the welded part is placed in a low-temperature environment for cryogenic treatment, and the temperature of the welded part is kept for 10-30 min after being uniform; taking out the welded piece subjected to the deep cooling treatment from a low-temperature environment, and rapidly heating to the conventional aging temperature of the welded piece; and after the temperature of the welding piece reaches the conventional aging temperature, reducing the temperature of the welding piece to the low-temperature aging temperature, keeping the temperature of the welding piece at the low-temperature aging temperature, and simultaneously adopting a vibration aging device to perform vibration treatment on the welding piece so as to eliminate the residual stress of the welding piece. The residual stress of the welded part treated by the method can be effectively released, and the mechanical property of the welded part is not reduced, but can be improved to different degrees.
Description
Technical Field
The invention relates to the technical field of welding, in particular to a method for eliminating residual stress of a welding piece.
Background
How to effectively regulate and control the residual stress of the welded parts after welding is always a focus problem in the field of domestic and foreign welding. During welding, the welding parts near the heat source are subjected to uneven local heat effects, and during the welding process, the welding parts undergo complex metallurgical processes, so that larger residual stress exists at the welding parts, particularly at the welding joints of the welding parts.
The existence of residual stress can lead to the reduction of the bearing capacity, the stress corrosion resistance and the fatigue life of the welding piece, increase the possibility of brittle fracture, and aggravate creep damage of the welding piece in a service environment, thereby causing great loss. Therefore, relief of weld residual stress after welding is necessary in production.
The conventional thermal aging method for eliminating residual stress of the welding piece generally needs to heat the welding piece to a higher temperature to effectively release the residual stress, however, the higher heating temperature can lead to carbide precipitation of weld joint tissue grain boundaries of the welding piece, the impact toughness of the welding joint is obviously reduced, and the effect of effectively releasing the residual stress cannot be achieved by reducing the aging temperature.
Disclosure of Invention
The invention provides a method for eliminating residual stress of a welding part, which is used for solving at least one technical defect in the prior art, realizing that the residual stress of the welding part after treatment can be effectively released, simultaneously, the mechanical property of the welding part can not be reduced, and the welding part can be improved to different degrees.
In order to achieve the above object, the present invention provides a method for eliminating residual stress of a welded part, comprising:
the welding piece is placed in a low-temperature environment for cryogenic treatment, and the temperature of the welding piece is kept for 10-30 min after being uniform;
taking out the welded piece subjected to the deep cooling treatment from a low-temperature environment, and rapidly heating to the conventional aging temperature of the welded piece;
and after the temperature of the welding piece reaches the conventional aging temperature, reducing the temperature of the welding piece to the low-temperature aging temperature, keeping the temperature of the welding piece at the low-temperature aging temperature, and simultaneously adopting a vibration aging device to perform vibration treatment on the welding piece so as to eliminate the residual stress of the welding piece.
According to the method for eliminating the residual stress of the welding piece, the welding piece is placed in a low-temperature environment for cryogenic treatment, and the welding piece is placed in a cryogenic box or soaked in low-temperature liquid.
According to the method for eliminating the residual stress of the welding piece, the temperature in the cryogenic box is less than or equal to minus 100 ℃.
According to the method for eliminating the residual stress of the welding piece, the temperature of the welding piece is minus 100 ℃ to minus 296 ℃ in a low-temperature environment.
According to the method for eliminating residual stress of welding parts provided by the invention, the low-temperature liquid comprises any one of liquid nitrogen, liquid hydrogen and liquid helium.
According to the method for eliminating the residual stress of the welding piece provided by the invention, the mode of taking out the welding piece subjected to the cryogenic treatment from the low-temperature environment and rapidly heating up comprises any one of the following steps:
placing the welding piece in a heat treatment furnace for rapid temperature rise;
placing the welding piece in induction heating equipment for rapid temperature rise;
the welding part is locally heated by a heating belt so as to quickly raise the temperature.
According to the method for eliminating the residual stress of the welding piece, the conventional aging temperature of the welding piece is 400-600 ℃.
According to the method for eliminating the residual stress of the welding piece, the temperature of the welding piece is kept at the low-temperature aging temperature, and the welding piece is heated by placing the welding piece in a low-temperature tempering furnace, a water bath pot, an oil bath pot or a heating belt.
According to the method for eliminating the residual stress of the welding piece, the low-temperature aging temperature of the welding piece is 80-250 ℃.
According to the method for eliminating the residual stress of the welding piece, provided by the invention, after the residual stress of the welding piece is eliminated, the temperature of the welding piece is stopped to be kept at the low-temperature aging temperature, and then the vibration aging device is closed, so that the welding piece is cooled to the room temperature.
According to the method for eliminating the residual stress of the welding piece, provided by the invention, by combining the cryogenic treatment and the low-temperature aging, the additional stress generated by the fact that the temperature is quickly increased after the cryogenic treatment and the large temperature difference is provided is combined with the residual stress, so that the material is subjected to micro plastic deformation to release the residual stress, in addition, the auxiliary vibration aging is performed in the low-temperature aging process, and the material is further promoted to be subjected to micro plastic deformation to release the residual stress.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a process diagram of a method for eliminating residual stress of a welded part provided by the invention;
FIG. 2 is a stainless steel weldment provided in one embodiment of the invention;
FIG. 3 is a schematic illustration of the residual stress in the heat affected zone after welding of a weld;
FIG. 4 is a schematic illustration of the residual stress in the heat affected zone of a welded article after a process treatment;
FIG. 5 is a second schematic view of residual stress in the heat affected zone after welding of the weld
FIG. 6 is a second schematic view of the residual stress in the heat affected zone of a welded part after processing;
FIG. 7 is a third schematic view of the residual stress in the heat affected zone of the welded component after processing;
FIG. 8 is a diagram showing the residual stress in the heat affected zone of a welded part after processing;
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the embodiments of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the embodiments of the present application will be understood by those of ordinary skill in the art in a specific context.
In the examples herein, a first feature "on" or "under" a second feature may be either the first and second features in direct contact, or the first and second features in indirect contact via an intermediary, unless expressly stated and defined otherwise. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Embodiments of the present invention are described below with reference to fig. 1 to 8. It should be understood that the following description is only illustrative of embodiments of the invention and is not intended to limit the invention in any way.
The conventional methods for eliminating the residual stress of the welding piece at present are methods such as postweld heat treatment, deformation treatment (overload stretching, vibration aging, hammering, shot blasting, explosion treatment and the like), ultrasonic treatment, natural aging and the like.
Each of the above methods has advantages and disadvantages, and is limited in application because the deformation treatment is difficult to realize uniform release of welding residual stress due to irregular shapes and different sizes of welding parts. The ultrasonic treatment technology has the advantages of larger equipment investment, strong manufacturability and higher application cost; the natural aging time is long, and the effect is not obvious. In the conventional means, the post-welding aging heat treatment mode of the welding parts made of other materials is relatively mature from the aspects of theory and practical application, however, for stainless steel welding seams, sensitization phenomenon existing in the aging process can obviously reduce the impact toughness of the welding seams, so that natural aging treatment has a larger risk of reducing residual stress when the aging treatment is adopted for the stainless steel welding parts applied at low temperature.
As shown in fig. 1, the present invention provides a method for eliminating residual stress of a welded part, comprising the steps of:
s10, deep cooling treatment: and (3) placing the welding piece in a low-temperature environment for cryogenic treatment, and keeping the temperature of the welding piece for 10-30 min after the temperature of the welding piece is uniform.
S20, rapidly heating: and taking out the welded piece subjected to the deep cooling treatment from the low-temperature environment, and rapidly heating to the conventional aging temperature of the welded piece.
S30, low-temperature aging vibration: and after the temperature of the welding piece reaches the conventional aging temperature, reducing the temperature of the welding piece to the low-temperature aging temperature, keeping the temperature of the welding piece at the low-temperature aging temperature, and simultaneously adopting a vibration aging device to perform vibration treatment on the welding piece so as to eliminate the residual stress of the welding piece.
It can be understood that the invention provides a method for eliminating residual stress of a welding piece in order to solve the defect that the impact toughness of the welding seam of the welding piece is obviously reduced due to carbide precipitation in a welding seam tissue grain boundary caused by higher heating temperature when the residual stress of the welding piece is eliminated in the prior art, but the residual stress cannot be effectively released when the aging temperature is reduced. By combining the cryogenic treatment and low-temperature aging, the material is subjected to micro plastic deformation under the combined action of external stress and residual stress generated by rapid temperature rise after cryogenic treatment and larger temperature difference, so that the residual stress is released.
In step S10, when the welded part is subjected to the cryogenic treatment in the low-temperature environment, the welded part may be treated in such a manner that the welded part is placed in a cryogenic tank.
Specifically, the welding piece is placed in a cryogenic box for treatment, and the temperature in the cryogenic box is set to be less than or equal to minus 100 ℃ so that the temperature of the welding piece is less than 100 ℃.
Further, in step S10, the welded part to be treated may be placed in a cryogenic box controlled by a program, and the temperature of the welded part is reduced to-196 ℃ and maintained for 30min by controlling the cooling rate of the welded part to be 1 ℃/min. The thermal stress generated by the welding piece in the process of cryogenic treatment is reduced as much as possible through slow cooling.
In the case of cryogenic treatment, the temperature of the weldment may be-100 ℃ to-296 ℃ in order to further reduce the thermal stress generated by the weldment.
In some embodiments of the present invention, when the welding member is subjected to the cryogenic treatment in the low-temperature environment in step S10, the welding member may also be directly immersed in the low-temperature liquid for the treatment.
Specifically, when the welded part is directly immersed in a cryogenic liquid for cryogenic treatment, the cryogenic liquid may be liquid nitrogen. If it is desired to lower the temperature of the weldment, liquid hydrogen (-253 ℃) or liquid helium (-269 ℃) can be used as the refrigerant to lower the temperature of the weldment.
As some embodiments of the present invention, in step S20, the manner of taking out the welded part after the cryogenic treatment from the low-temperature environment and rapidly heating up may be any of the following:
in the first mode, the welding part is placed in a heat treatment furnace to be heated up rapidly.
In the second mode, the weldment is placed in an induction heating apparatus for rapid heating.
In a third mode, the welding member is locally heated by a heating belt.
When the welding parts are heated up quickly by adopting the heat treatment furnace, the temperature of the heat treatment furnace can be set to 600 ℃ and heated to the temperature for heat preservation, and then the welding parts in the deep cooling box are taken out and placed in the heat treatment furnace quickly and the furnace door is closed. During the first treatment, the thermocouple is fixed on the surface of the welding part to monitor the temperature change, and the welding part is quickly taken out and placed in a low-temperature aging temperature environment after the temperature of the thermocouple is about 600 ℃.
In the embodiment, as shown in fig. 1, in step S20, the conventional aging temperature of the welded part is 400-600 ℃, that is, the temperature of the weld joint and the heat affected zone is quickly raised to a higher temperature, and after the whole welded part reaches the higher temperature, the temperature is quickly lowered to a low-temperature aging temperature.
As some embodiments of the present invention, in step S30, the method of maintaining the temperature of the welding member at the low temperature aging temperature may be performed by placing the welding member in a low temperature tempering furnace to heat the welding member as a whole. The welding piece can be placed in a water bath kettle, so that the welding piece is integrally heated. And the welding part can be placed in an oil bath pot to be heated integrally. In addition, the welding part can be locally heated by a heating belt.
In this embodiment, as shown in fig. 1, the low-temperature aging temperature of the welded part is 80 ℃ to 250 ℃ in step S30. The welding piece is insulated at the low-temperature aging temperature, vibration aging is carried out in the insulation process, the vibration head is arranged at the proper position of the welding piece, vibration is started after the temperature of the welding piece is uniform, and the vibration is carried out in the insulation process.
Further, in step S30, the low temperature aging environment box with the vibrator may be heated to 200 ℃ in advance and kept warm, the welded part is taken out and then quickly placed in the environment box, at this time, the vibrator may be installed at the proper position of the welded part, and after the temperature of the welded part is stable, the vibrator is started to start vibration aging. And closing the vibrator after the heat preservation is finished, taking out the welding piece, and cooling the welding piece to the room temperature.
Specifically, after the residual stress of the welded part is eliminated and the temperature of the welded part is stopped to be maintained at the low-temperature aging temperature, the vibration aging device should be turned off to cool the welded part to room temperature.
As some embodiments of the invention, the method for eliminating the residual stress of the welding piece provided by the invention can be applied to stainless steel welding pieces, and can also be applied to welding pieces made of other materials, such as copper welding pieces, aluminum alloy welding pieces and the like.
As shown in fig. 2 to 8, a method for eliminating residual stress of a welded part according to the present invention will be described in detail using a stainless steel welded part as an example.
Firstly, two 304 stainless steel plates with the dimensions of 200mm multiplied by 100mm multiplied by 5mm are selected, argon arc welding is adopted to carry out self-fusion welding along the length direction, the input heat in the welding process is high, the thermal stress is high, and high welding residual stress is generated after welding, and a specific stainless steel weld joint is shown in figure 2.
Then, placing the welded stainless steel welding part in a cryogenic box controlled by a program, cooling to-196 ℃ by controlling the cooling rate to be 1 ℃/min, preserving heat for 30min, and reducing the thermal stress generated in the cryogenic treatment process as much as possible by slowly cooling.
Further, the temperature of the medium temperature furnace was set to 600 ℃, and the medium temperature furnace was heated to that temperature for heat preservation. And taking out the stainless steel welding parts in the deep cooling box and rapidly placing the stainless steel welding parts in a medium temperature furnace. The first treatment can be to fix the thermocouple on the surface of the stainless steel welding piece to monitor the temperature change, and when the thermocouple temperature is about 600 ℃, the stainless steel welding piece is quickly taken out and placed in a low-temperature aging temperature environment.
And finally, heating the low-temperature aging environment box with the vibration platform to 200 ℃ in advance, preserving heat, taking out the stainless steel welding piece, rapidly placing the stainless steel welding piece in the environment box, and starting the vibrator to start vibration aging after the temperature is stable. And closing the vibrator after the heat preservation is finished, taking out the stainless steel welding piece for air cooling, and finishing.
As shown in fig. 3 to 8, after the stainless steel welding part is treated by the method for eliminating the residual stress of the welding part provided by the invention, the residual stress in the direction of a heat affected zone X, Y of the stainless steel welding part is obviously reduced by more than or equal to 50% as can be seen from a graph of depth-residual stress.
The invention fully utilizes the advantages of three destressing means of cryogenic treatment, heat treatment and deformation treatment, reduces the temperature of the welding piece through the cryogenic treatment, realizes the improvement of the performance of the welding piece, increases the temperature difference, provides larger thermal stress for the welding piece through rapid temperature rise to higher aging temperature, thereby realizing the release of the residual stress through interaction with the residual stress, and in addition, rapidly reduces the temperature of the welding piece to low-temperature aging temperature after reaching higher aging temperature, thereby avoiding the damage of microstructure change of the welding piece to the mechanical performance under high temperature.
It should be noted that, the technical solutions in the embodiments of the present invention may be combined with each other, but the basis of the combination is based on the fact that those skilled in the art can realize the combination; when the combination of the technical solutions contradicts or cannot be realized, it should be considered that the combination of the technical solutions does not exist, i.e. does not fall within the scope of protection of the present invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method of eliminating residual stress in a weldment, comprising:
the welding piece is placed in a low-temperature environment for cryogenic treatment, and the temperature of the welding piece is kept for 10-30 min after being uniform;
taking out the welded piece subjected to the deep cooling treatment from a low-temperature environment, and rapidly heating to the conventional aging temperature of the welded piece;
and after the temperature of the welding piece reaches the conventional aging temperature, reducing the temperature of the welding piece to the low-temperature aging temperature, keeping the temperature of the welding piece at the low-temperature aging temperature, and simultaneously adopting a vibration aging device to perform vibration treatment on the welding piece so as to eliminate the residual stress of the welding piece.
2. The method of claim 1, wherein the subjecting the weldment to cryogenic treatment is performed by placing the weldment in a cryogenic tank or immersing the weldment in a cryogenic liquid.
3. The method of eliminating residual stress of welded parts according to claim 2, wherein the temperature in the cryogenic box is less than or equal to-100 ℃.
4. A method of eliminating residual stress of welded parts according to claim 3, wherein the temperature of the welded parts is-100 ℃ to-296 ℃ in a low temperature environment.
5. The method of eliminating residual stress of welded parts according to claim 2, wherein the cryogenic liquid comprises any one of liquid nitrogen, liquid hydrogen and liquid helium.
6. The method of eliminating residual stress of welded parts according to claim 1, wherein the means for taking out the welded parts after the cryogenic treatment from the low temperature environment and rapidly heating up the welded parts comprises any one of the following:
placing the welding piece in a heat treatment furnace for rapid temperature rise;
placing the welding piece in induction heating equipment for rapid temperature rise;
the welding part is locally heated by a heating belt so as to quickly raise the temperature.
7. The method of eliminating residual stress of welded parts according to claim 6, wherein the conventional aging temperature of the welded parts is 400 ℃ to 600 ℃.
8. The method of claim 1, wherein maintaining the temperature of the weldment at the low temperature aging temperature comprises heating the weldment in a low temperature tempering furnace, a water bath, an oil bath, or with a heating belt.
9. The method of eliminating residual stress of welded parts according to claim 8, wherein the low temperature aging temperature of the welded parts is 80 ℃ to 250 ℃.
10. The method of eliminating residual stress of welded parts according to claim 8, wherein after eliminating residual stress of welded parts, the temperature of welded parts is stopped to be maintained at a low temperature aging temperature, and the vibration aging device is turned off to cool the welded parts to room temperature.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101147952B1 (en) * | 2011-11-14 | 2012-05-24 | (주) 동양에이.케이코리아 | Heat treatment for removing residual stress |
| CN103589855A (en) * | 2013-12-03 | 2014-02-19 | 北京航空航天大学 | Low temperature treatment-vibration aging combined residual stress homogenization method |
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| CN115029525A (en) * | 2022-06-22 | 2022-09-09 | 北京航空航天大学 | Deep cooling-thermal vibration integrated composite process stress regulating and controlling device |
| CN115233121A (en) * | 2022-06-22 | 2022-10-25 | 北京航空航天大学 | Cryogenic-thermal vibration composite residual stress homogenization method |
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2023
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| KR101147952B1 (en) * | 2011-11-14 | 2012-05-24 | (주) 동양에이.케이코리아 | Heat treatment for removing residual stress |
| CN103589855A (en) * | 2013-12-03 | 2014-02-19 | 北京航空航天大学 | Low temperature treatment-vibration aging combined residual stress homogenization method |
| US20190170486A1 (en) * | 2017-12-06 | 2019-06-06 | No.59 Research Institute Of China Ordnance Industry | Preparation Method of Uniform Low Stress Cone Shaped Charge Liner |
| CN108531836A (en) * | 2018-05-09 | 2018-09-14 | 湖南人文科技学院 | A kind of heat treatment technics preparing the low residual stress aluminium alloy of high-performance |
| CN109112449A (en) * | 2018-10-23 | 2019-01-01 | 湖南大学 | A method of eliminating aluminum alloy die forgings residual stress |
| CN115029525A (en) * | 2022-06-22 | 2022-09-09 | 北京航空航天大学 | Deep cooling-thermal vibration integrated composite process stress regulating and controlling device |
| CN115233121A (en) * | 2022-06-22 | 2022-10-25 | 北京航空航天大学 | Cryogenic-thermal vibration composite residual stress homogenization method |
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