热处理对离心铸造自生梯度功能复合材料Al-20Si-5Mg合金的组织性能影响

Influences of Heat Treatment on Microstructures and Properties of in Situ Functionally Gradient Composites of Al-20Si-5Mg Alloy by Centrifugal Casting

通过对离心铸造Al-20Si-5Mg合金筒状铸件在不同热处理状态下的硬度和耐磨性能的测定以及显微组织的观察,分析了热处理工艺对合金硬度及耐磨性能的影响。结果表明:铸件内层的硬度在510℃×6 h固溶处理后达到最大值HRB90,510℃×6 h固溶处理后210℃×12 h时效,铸件内层具有最好的耐磨性能。

The heat treatment effect on microstructures and properties of AI-20Si-5Mg alloy tube was studied. The results show that the hardness of the inner layer of the tube can reach the highest value of HRB90 after solution heat treatment at 510 ℃ for 6 h, and the inner layer of the tube obtains the best wear resistance after solution at 510 ℃ for 6 h and ageing at 210 ℃ for 12 h.