A kind of aluminum alloy cold ring rolling stress relief method

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...

AI Technical Summary

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