Stress eliminating method for aluminum alloy cold ring rolling
A technology for eliminating stress and aluminum alloy, which is applied in the field of aluminum alloy manufacturing, can solve the problems of inapplicability of small batch products, high input cost, and high mold cost, and achieve the effects of low cost, elimination of machining deformation, and elimination of residual stress
Active Publication Date: 2017-02-01
WUXI PAIKE HEAVY CASTING & FORGING
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Problems solved by technology
[0003] At present, after the solid solution is completed, the domestic aluminum alloy ring forging T_51 is placed on the cold-expanding machine with a pre-made mold, and the cold-expanding is performed to achieve stretching and stress relief. However, the one-time investment cost of the expanding machine equipment is high, and each Ring parts can only be expanded with special tooling, and the cost of the mold is relatively high, which is not suitable for small batch products
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0018] A kind of aluminum alloy cold ring rolling stress relief method comprises the following steps:
[0019] Step 1: Put the aluminum alloy ring forging in a heating furnace, heat it to 535°C and keep it warm for 5 hours, then take the aluminum alloy forging out of the heating furnace, and put the aluminum alloy forging in water within 8 seconds to cool it to room temperature; The water temperature when the alloy forging is water-cooled is 60°C, and the water-cooling time is 20 minutes.
[0020] Step 2: transfer the aluminum alloy ring forging with an inner hole diameter of 900mm and a height of 100mm to a 10m ring rolling machine within 10min to 20min for cold rolling until the outer diameter of the aluminum alloy ring forging is enlarged by 2%. The inner diameter of the rolled aluminum alloy ring forging is 918mm and the height is 100mm. During cold rolling, the speed of the main roll of the ring rolling machine is 1150mm / s, the feed speed of the core roll of the ring rol...
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Abstract
The invention relates to a stress eliminating method for aluminum alloy cold ring rolling. According to the method, residual stress is eliminated through cold deformation and stretching generated after solid solution of aluminum alloy forge pieces, a 10m ring rolling machine is used for conducting cold ring rolling on the aluminum alloy forge pieces, and the outer diameters of the aluminum alloy forge pieces are expanded by 2%-3%; residual stress can be further eliminated, machining deformation of the aluminum alloy forge pieces is eliminated, cold expanding equipment and special cold expanding molds do not need to be invested at a time, and only existing ring rolling machines are needed. The method has the advantages that investment is low and the cost is low, and is effectively suitable for small-batch products.
Description
technical field [0001] The invention relates to the field of aluminum alloy manufacturing, in particular to a method for eliminating stress by cold ring rolling of aluminum alloy. Background technique [0002] With the rapid development of my country's aerospace industry, modern defense industry and transportation industry, the lightweight of important stress-bearing parts and structural parts has prompted more and more calls for replacing steel with aluminum, and the use and demand of aluminum alloy forgings are increasing. Gradually increase. The heat treatment state of some brands of aluminum alloy is T_51 state (stretching stress relief state. It is suitable for solution heat treatment or cooling after high temperature forming, and the stress is relieved by stretching to produce products with a permanent deformation of 1% to 5%). After the solution treatment, it is necessary to perform cold expansion and then aging heat treatment to eliminate the solution residual stress...
Claims
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IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 刘其源许亮刘智何方有李姚君丁佐军郑卓郜均虎
Owner WUXI PAIKE HEAVY CASTING & FORGING