Superplastic Forming Method of LC4 Aluminum Alloy Ring with Complicated Section

Abstract

The invention discloses a super-plasticity forming method for an LC4 aluminum alloy ring part with a complex section. The method comprises the steps that an LC4 aluminum alloy is heated to the temperature of 460+ / -10 DEG C, the temperature is kept for 2 hours, and water cooling is performed; the LC4 aluminum alloy is heated to the temperature of 380+ / -10 DEG C, the temperature is kept for 6 hours, and water cooling is performed; the alloy is heated to the temperature of 200+ / -10 DEG C, after forge deformation with deflection larger than or equal to 80%, the temperature is kept at 460+ / -10 DEG C for 30 minutes, water cooling is performed, and a crystal LC4 aluminum alloy blank is obtained; the LC4 aluminum alloy blank is rapidly rolled and formed at the maximum feed speed of 2.6 mm / s at the temperature of 480-510 DEG C, and the LC4 aluminum alloy ring part with the complex section is obtained. According to the method, the LC4 aluminum alloy can be in a super-plasticity state in the forming process, so that the LC4 aluminum alloy ring part with the complex section and both the performance and the size meeting requirements is obtained. The ring part is mainly taken as a connection ring, a bearing ring and the like to be widely applied to mechanized equipment in the industry areas such as aviation and aerospace.

Description

technical field [0001] The invention relates to a superplastic forming method, in particular to a superplastic forming method of an LC4 aluminum alloy complex section ring piece. Background technique [0002] Ring parts with complex cross-sections are widely used as connections, slewing support rings, bearing rings, etc. in large-scale mechanical equipment in aviation, aerospace, construction machinery, wind power, petrochemical and other industrial fields. This kind of ring has harsh service conditions, high requirements on its performance, and the structure of the ring is complex. It is difficult to meet the performance and size requirements of the ring at the same time by using the traditional forming method. [0003] Superplastic forming technology has been widely used in aviation, aerospace and other fields due to its advantages of low deformation resistance, high material plasticity, and the ability to precisely form complex parts at one time. At present, the research...

AI Technical Summary

Problems solved by technology

At present, the research on the superplasticity of LC4 aluminum alloy is limited to the tensile test of the material; and in the field of ring rolling, there has been no report on the superplastic forming of LC4 aluminum alloy ring parts with complex cross-sections.

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