CN105369169B - Aluminum alloy part cold cycling size stabilization technique - Google Patents
Aluminum alloy part cold cycling size stabilization technique Download PDFInfo
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- CN105369169B CN105369169B CN201510904474.3A CN201510904474A CN105369169B CN 105369169 B CN105369169 B CN 105369169B CN 201510904474 A CN201510904474 A CN 201510904474A CN 105369169 B CN105369169 B CN 105369169B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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Abstract
Aluminum alloy part cold cycling size stabilization technique, comprises the following steps：1）Aluminum alloy part after roughing is cooled to 80~120 DEG C with 1~5 DEG C/min speed, is incubated 1 3h；2）Continue to be down to 120~160 DEG C with 1~5 DEG C/min speed, be incubated 1~3h；3）Continue to be down to 196 DEG C with 1~5 DEG C/min speed, then using 10~36h of immersing in liquid nitrogen；4）Immersion is warming up to 100~180 DEG C after terminating with 1~5 DEG C/min ladder speed, is incubated 2~6h, is incubated after terminating and is cooled to room temperature with stove；5）Then according still further to step 1）~step 7）Circulation 1~2 time.Macroscopic residual stress, the stabilizing material tissue that the present invention is easy to process, high in machining efficiency, effectively reduces inside parts, so as to improve aluminum alloy part dimensional stability.
Description
Technical field
The present invention relates to a kind of aluminum alloy part size stabilization technique, and more particularly to one kind can be inside same equipment
The aluminum alloy part cold cycling size stabilization technique of realization.
Background technology
Aluminium alloy has the series of advantages such as density is small, intensity is high, corrosion resistance and good moldability, cost are low, in aviation, boat
My god, ship, nuclear industry and weapon industry suffer from being widely applied prospect and irreplaceable status, thus aluminium alloy technology quilt
It is classified as science and techniques of defence key technology and the basic technology given priority to.However, in actual processing production, particularly navigated in aviation
My god, the Precision Machining field such as auto industry and weapon industry, with the increasingly raising of its required precision, to precision aluminium-alloy zero
The dimensional stability requirements more and more higher of part, especially after machining, the change of dimensional accuracy is difficult to reach technical requirements；Or
Certain time is placed after machined, dimension overproof etc. is found during assembling, so as to bring certain influence to Product Assembly, very
To causing scrapping for part.Dimensional stability problems are one of generally existing during accurate aluminum alloy part use and asked
Topic.
So-called dimensional stability problems refer to material after heat treatment and completion of processing, not by outer under working environment
Power acts on or resisted under the stress less than elastic limit the ability of permanent deformation, and keeps size in process
Constant ability.The solution method of current most of aluminum alloy part size stabilization is to be aided with Ageing Treatment in process
With the process such as multiple N Reference Alignment, a part needs multiple N Reference Alignment, so does time-consuming expense money, and the product manufacturing cycle compared with
Long, unstable product quality, for Aero-Space and military enterprise, the dimensional stability problems of aluminum alloy part have turned into
Restrict the bottleneck of production.
As cryogenic technique continues to develop, obtain relatively low temperature and be more prone to, meanwhile, subzero treatment technology is at home
Constantly development, found by research and practical application, by deep cooling（Less than -100 DEG C）Processing and lonneal（Less than 250 DEG C）
Processing is combined and iterative cycles are repeatedly handled aluminum alloy part, can be effectively improved the dimensionally stable of aluminum alloy part
Property.
The content of the invention
It is an object of the present invention to provide a kind of easy to process, good stability of the dimension, aluminum alloy part high in machining efficiency are cold and hot
Size stabilization technique is circulated, the execution of the technique is carried out using the deep cold treatment apparatus with tempering function, in implementation procedure
A period of time is incubated after part is slowly cooled into certain temperature from room temperature, required tempering is then warming up to certain speed
Temperature and held for some time, so circulate 1~3 time, the macroscopic residual stress of inside parts, stable material are reduced by the processing
Tissue is expected, so as to improve aluminum alloy part dimensional stability.
What the present invention was realized in：Aluminum alloy part cold cycling size stabilization technique, it is characterised in that：Bag
Include following steps：1）Aluminum alloy part after roughing is cooled to -80~120 DEG C with 1~5 DEG C/min speed, is incubated 1-
3h；2）Continue to be down to -120~-160 DEG C with 1~5 DEG C/min speed, be incubated 1~3h；3）Continue with 1~5 DEG C/min speed
Rate is down to -196 DEG C, then using 10~36h of immersing in liquid nitrogen；4）It is incubated after terminating and is warming up to -120 with 1~5 DEG C/min speed
~-160 DEG C, it is incubated 1-3h；5）, continue to be warming up to -80~120 DEG C with the speed with 1~5 DEG C/min, be incubated 1-3h；6）, after
The continuous speed with 1~5 DEG C/min is warming up to room temperature, is incubated 1-3h；7）, be further continued for being warming up to 100 with 1~5 DEG C/min speed
~180 DEG C, 2~6h is incubated, is incubated after terminating and is cooled to room temperature with stove；5）Then according still further to step 1）~step 7）Circulation 1~2
It is secondary.
The step 1）The middle aluminum alloy part by after roughing is cooled to -80~120 DEG C with 3 DEG C/min speed, protects
Warm 2h.
The step 2）Continue to be cooled to -120~-160 DEG C with 3 DEG C/min speed, be incubated 2h.
The step 3）Continue to be cooled to -196 DEG C with 3 DEG C/min speed, be incubated 2h.
The step 4）It is incubated after terminating and is warming up to -120~-160 DEG C with 3 DEG C/min speed, is incubated 2h.
The step 5）Continue to be warming up to -80~120 DEG C with the speed with 3 DEG C/min, be incubated 2h.
The step 6）Continue to be warming up to room temperature with the speed with 3 DEG C/min, be incubated 2h.
The step 7）It is further continued for being warming up to 100~180 DEG C with 3 DEG C/min speed, is incubated 4h.
The greenhouse cooling of the aluminum alloy part is to -196 DEG C, using immersing in liquid nitrogen 14~32h immersion treatments；The aluminium closes
The temperature of metal parts is warming up to 140 DEG C, soaking time 4h；Insulation terminates to start for the second time after rear part is cooled to room temperature with stove
Circular treatment.
Described cold cycling number is 1-3 times.
The present invention is easy to process, high in machining efficiency, the macroscopic residual stress that effectively reduces inside parts, stabilizing material group
Knit, so as to improve aluminum alloy part dimensional stability.
Brief description of the drawings
Fig. 1 is present invention process schematic diagram.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings：
Aluminum alloy part cold cycling size stabilization technique, it is characterised in that：Comprise the following steps：1）To slightly it add
Aluminum alloy part after work is cooled to -80~120 DEG C with 1~5 DEG C/min speed, is incubated 1-3h；2）Continue with 1~5 DEG C/
Min speed is down to -120~-160 DEG C, is incubated 1~3h；3）Continue to be down to -196 DEG C with 1~5 DEG C/min speed, then use
10~36h of immersing in liquid nitrogen；4）It is incubated after terminating and is warming up to -120~-160 DEG C with 1~5 DEG C/min speed, is incubated 1-3h；5）、
Continue to be warming up to -80~120 DEG C with the speed with 1~5 DEG C/min, be incubated 1-3h；6）, continue with 1~5 DEG C/min speed liter
Warm to room temperature, be incubated 1-3h；7）, be further continued for being warming up to 100~180 DEG C with 1~5 DEG C/min speed, be incubated 2~6h, insulation
After end room temperature is cooled to stove；5）Then according still further to step 1）~step 7）Circulation 1~2 time.The step 1）In will slightly add
Aluminum alloy part after work is cooled to -80~120 DEG C with 3 DEG C/min speed, is incubated 2h.The step 2）Continue with 3 DEG C/
Min speed is cooled to -120~-160 DEG C, is incubated 2h.The step 3）Continue to be cooled to -196 DEG C with 3 DEG C/min speed,
It is incubated 2h.The step 4）It is incubated after terminating and is warming up to -120~-160 DEG C with 3 DEG C/min speed, is incubated 2h.The step
5）Continue to be warming up to -80~120 DEG C with the speed with 3 DEG C/min, be incubated 2h.The step 6）Continue with 3 DEG C/min speed
Rate is warming up to room temperature, is incubated 2h.The step 7）It is further continued for being warming up to 100~180 DEG C with 3 DEG C/min speed, is incubated 4h.Institute
The greenhouse cooling of aluminum alloy part is stated to -196 DEG C, using immersing in liquid nitrogen 14~32h immersion treatments；The temperature of the aluminum alloy part
Degree is warming up to 140 DEG C, soaking time 4h；Insulation terminates rear part and is cooled to after room temperature with stove to start second of circular treatment.
Described cold cycling number is 1-3 times.
Set when it is implemented, the later aluminum alloy part of several roughing is put into the subzero treatment with tempering function
It is standby, liquid nitrogen temperature is cooled to 1~5 DEG C/min speed（-196℃）, in order to reduce cold shock, temperature-fall period uses staged
Carry out, i.e., be down to -80~120 DEG C from room temperature, be incubated 1-3h；Insulation continues to be cooled to -120~-160 DEG C after terminating, and insulation 1~
3h；Insulation is directly down to -196 DEG C after terminating, and now equipment is out of service, and liquid nitrogen is passed directly into deep cooling treatment tank and carried out
Immersion, 10~36h of soak time.After immersion terminates, start deep cold treatment apparatus, and controlled using equipment, with 1~5 DEG C/min
Speed heated up, equally heated up, and heated up according to the same ladder of temperature-fall period using staged, be warming up to 100
~180 DEG C, 2~6h is incubated, insulation is furnace-cooled to room temperature after terminating, and is one cycle.Deformed according to aluminum alloy part structural analysis
Situation, circular treatment number is determined, to complicated, the part for easily causing more gross distortion uses 2~3 circular treatments.
The aluminum alloy part of mistake processed by the invention, dimensionally stable after finishing, is unlikely to deform.
The present invention is carried out using the deep cold treatment apparatus with tempering function, several stackable aluminium alloys zero in equipment
Part, and process parameter control can be realized, part need not be shifted, be moved in processing procedure, be substantially avoid cold and hot
The influence of extraneous factor in circulating treatment procedure.The present invention is easy to operate, non-environmental-pollution, treatment effeciency are high, high treating effect,
The dimensional stability of aluminum alloy part is effectively increased, so as to effectively solve deformation of the aluminum alloy part in process of manufacture
Problem, product quality is set to improve a New step.
Claims (1)
1. aluminum alloy part cold cycling size stabilization technique, it is characterised in that：Comprise the following steps：
1）Aluminum alloy part after roughing is cooled to -80~120 DEG C with 1~5 DEG C/min speed, is incubated 1-3h；2）After
The continuous speed with 1~5 DEG C/min is down to -120~-160 DEG C, is incubated 1~3h；
3）Continue to be down to -196 DEG C with 1~5 DEG C/min speed, then using 10~36h of immersing in liquid nitrogen；
4）It is incubated after terminating and is warming up to -120~-160 DEG C with 1~5 DEG C/min speed, is incubated 1-3h；
5）, continue to be warming up to -80~120 DEG C with the speed with 1~5 DEG C/min, be incubated 1-3h；
6）, continue to be warming up to room temperature with 1~5 DEG C/min speed, be incubated 1-3h；
7）, be further continued for being warming up to 100~180 DEG C with 1~5 DEG C/min speed, be incubated 2~6h, insulation cools after terminating with stove
To room temperature；
8）Then according still further to step 1）~step 7）Circulation 1~2 time.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113684430B (en) * | 2021-08-18 | 2022-08-09 | 上海交通大学 | Heating and cooling circulation heat treatment method near primary precipitation phase initial melting temperature of cast alloy |
| CN114807547A (en) * | 2022-05-25 | 2022-07-29 | 江苏明越精密高温合金有限公司 | Method for reducing quenching residual stress of die forging |
| CN116445690A (en) * | 2023-03-06 | 2023-07-18 | 哈尔滨工业大学 | Heat treatment method for improving dimensional stability of metal matrix in long-term temperature fluctuation environment |
Citations (2)
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|---|---|---|---|---|
| CN102061433A (en) * | 2011-01-20 | 2011-05-18 | 北京卫星制造厂 | Dimensional stabilizing method for high-precision thin-wall aluminum-alloy part |
| CN103484655A (en) * | 2013-10-15 | 2014-01-01 | 北京航空航天大学 | Stress homogenizing device for eliminating residual stress of workpiece based on cold/heat cycle principles |
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2015
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061433A (en) * | 2011-01-20 | 2011-05-18 | 北京卫星制造厂 | Dimensional stabilizing method for high-precision thin-wall aluminum-alloy part |
| CN103484655A (en) * | 2013-10-15 | 2014-01-01 | 北京航空航天大学 | Stress homogenizing device for eliminating residual stress of workpiece based on cold/heat cycle principles |
Non-Patent Citations (3)
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| ZL104合金的尺寸稳定化研究;刘淑云;《宇航材料工艺》;19911231;4-8 * |
| 提高惯导陀螺仪零部件尺寸稳定性的途径;陈志学等;《航天工艺》;19891231;第28页最后一段、第29页第3段、第30也第3段以及图2 * |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhou Qingguo Inventor after: He Hongjun Inventor before: Gu Kaixuan Inventor before: Ji Yuping Inventor before: Guo Jia Inventor before: Wang Junjie |
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Effective date of registration: 20180207 Address after: 226600 Haian Development Zone and Shun Road, Haian County, Nantong, Jiangsu Applicant after: Haian Forging Industry Co., Ltd. Address before: 214500 Jiangsu city of Taizhou province Jingjiang City Huaxiang Road South Park and textile factory Applicant before: CHINA CRYOPOWER TECHNOLOGY CO., LTD. |
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