Aluminium alloy rod end surface coarse-grain control method

Abstract

The invention belongs to the field of aluminium alloy extrusion, and relates to an aluminium alloy rod end surface coarse-grain control method. An aluminium alloy raw material comprises the followingcomponents: 0.05-0.10% of Zn, 0.5-0.7% of Mg, 0.05-0.10% of Cu, 0.4-0.5% of Mn, 0.05-0.10% of Cr, less than or equal to 0.05% of Ti, less than or equal to 0.05% of B, 1.0-1.1% of Si, less than or equal to 0.2% of Fe, less than or equal to 0.05% of a single impurity, less than or equal to 0.15% of total other impurities, and the balance Al. Through methods of adding a sample deformation zone removing procedure to an extrusion process, controlling the online sawing deformation length of samples and the like, the defect of end surface quenching coarse-grains, caused by sawing deformation, of themacro samples is controlled, product obsolescence caused by macro defects of products is effectively reduced by controlling the rod end surface coarse-grains, due to improvement of a first pass yield,resource waste and manpower waste during secondary quenching of the samples are avoided, and an advanced trial-manufacture success rate is ensured in a new product development process at the same time.

Description

technical field [0001] The invention belongs to the field of aluminum alloy extrusion and relates to a method for controlling coarse grains on the end faces of aluminum alloy rods. Background technique [0002] In the extrusion production process of aluminum alloy forged rods for automobiles, the coarse grains of the product are judged by the test results after quenching of the low-magnification material sample. If there are coarse grains in the low-magnification, the product needs to be shortened to the length of the finished product for secondary sampling and quenching , Inspection, if the low-magnification material sample is still unqualified after the second quenching, it is determined that the finished product is scrapped. [0003] Automobile forged rods are processed into automobile control arms after forging. The quality of automobile control arms directly affects the safety performance of automobile finishing. ≤0.3mm after quenching, and the quality of the product i...

AI Technical Summary

Problems solved by technology

[0005] In view of this, in order to solve the problem that the aluminum alloy cast rod prepared by the existing processing technology has serious coarse grain defects after quenching on the end surface, which leads to high product inspection costs and high product rejection rate, it provides a method for controlling the coarse grain on the end face of aluminum alloy rods. method