Method for manufacturing aluminium alloy rings with high performance and low residual stress

Abstract

The invention discloses a method for manufacturing aluminium alloy rings with high performance and low residual stress, comprising the following technical steps: 1) calculating blank weight of forgings according to size and metal residual content of ring forgings; 2) calculating the diameter Phi and length L of aluminium alloy round ingots according to the volume constancy principle; 3) finishing the upsetting and cogging processes by using upper and lower recessed anvils, and preparing ring blank by shallow recessing and punching; 4) preparing rolling ring blank by using flat-die forging trestle broaching on the ring blank; 5) rolling out aluminium ring forgings with big diameter and thick wall by using a ring rolling mill; 6) carrying out solution heat treatment and high water temperature quenching, then carrying out axial cold compression and deformation, and finally finishing artificial aging heat treatment; and 7) carrying out crack detection on the ring by using ultrasonic according to the standard requirement, and carrying out sampling and mechanic performance detection on the main body of the ring complying with the standard requirement. The method has the advantages of high metal utilization rate, complete and uniform deformation from the surface to the core of the ring, high performance, low residual stress and the like.

Description

technical field [0001] The invention relates to a production process of an aluminum alloy ring forging, belonging to the field of aluminum alloy processing. Background technique [0002] At present, in order to obtain high-performance, small residual stress aluminum alloy rings, especially aluminum alloy rings with a wall thickness > 150mm, deformation and heat treatment must be solved. [0003] In terms of deformation, although the traditional saddle reaming method can penetrate deep into the core of the forging, it has the disadvantages of uneven deformation and low metal utilization rate. Although the ring rolling machine hole reaming method has uniform deformation and high metal utilization rate, it is There is a problem of cumulative deformation of the surface. [0004] In terms of heat treatment, the heat treatment system that can be provided by relevant standards and regulations is only suitable for forgings with a wall thickness of <150mm. The heat treatment ...

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Problems solved by technology

[0003] In terms of deformation, although the traditional saddle reaming method can penetrate deep into the core of the forging, it has the disadvantages of uneven deformation and low metal utilization rate. Although the ring rolling machine hole reaming method has uniform deformation and high metal utilization rate, it is There is a problem of cumulative deformation on the surface

[0004] In terms of heat treatment, the heat treatment system that can be provided by relevant standards and regulations is only suitable for forgings with a wall thickness of <150mm. The heat treatment of residual stress, in essence, this problem has not been solved

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