Heat Treatment for Semi-solid Thixoformed A356 Al Alloy Bush Cap

Wang Ping  Lu Guimin  Cui Jianzhong

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Heat Treatment for Semi-solid Thixoformed A356 Al Alloy Bush Cap
Issue 5, Pages: 18-19(2003)
Published： 2003 ，
DOI：

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[1]王平,路贵民,崔建忠,董维国.AlSi7Mg合金半固态成形件的热处理工艺[J].特种铸造及有色合金,2003(05):18-19+66.

Wang Ping Lu Guimin Cui Jianzhong. Heat Treatment for Semi-solid Thixoformed A356 Al Alloy Bush Cap. [J]. Special Casting & Nonferrous Alloys (5):18-19(2003)
[1]王平,路贵民,崔建忠,董维国.AlSi7Mg合金半固态成形件的热处理工艺[J].特种铸造及有色合金,2003(05):18-19+66. DOI：

Wang Ping Lu Guimin Cui Jianzhong. Heat Treatment for Semi-solid Thixoformed A356 Al Alloy Bush Cap. [J]. Special Casting & Nonferrous Alloys (5):18-19(2003) DOI：

摘要

利用电阻炉加热

采用正交设计方法

优化了半固态A3 5 6铝合金触变成形件轴瓦盖的热处理工艺

并进行了硬度测试。结果表明 :半固态成形后的轴瓦盖T6处理的最佳工艺制度为固溶温度 5 3 5℃

固溶时间 10h

时效温度 165℃

时效时间 5h。其硬度值（HV）为 116.85MPa

此时析出相分布均匀

组织细小。

Abstract

Heat treatment process for semi-solid thixoformed A356 alloy bush cap was optimized by orthogonal method under the condition of heating in resistance furnace. The microstructures and properties of the bush cap were examined. The results showed that optimum T6 treatment for semi-solid thixoformed bush cap is shown as follows: solid solution temperature 535 ℃ for 10h

ageing temperature 165 ℃ fo 5 h. Hardness of bush cap Hv 116.85. Meanwhile

precipitated phase is characterized by uniform distribution and fine microstructure. The existence of thixoformed zone results in strengthening effects to some extent. The properties of heat-treated thixoformed bush cap are superior to those in low-pressure casting and other semi-solid methods also.