基于正交回归的高硅活塞合金高温性能研究  

High Temperature Property Study of High Silicon Aluminum Piston Alloy Based on Orthogonal Test Design

作　　者：胡慧芳[1] 李华基[1] 薛寒松[1] 孔凡校[2] 

机构地区：[1]重庆大学机械工程学院,重庆400044 [2]中国铝业股份有限公司郑州研究院,河南郑州450041

出　　处：《铸造技术》2008年第8期1059-1061,共3页Foundry Technology

摘　　要：运用正交回归法设计了Cu、Mg、Mn元素影响Al-24％Si活塞合金高温抗拉强度的试验方案。建立了3元素与合金300℃抗拉强度（σb.300℃）之间的二次拟合方程。结果表明、在磷、混合稀土、锶复合变质的基础上，Cu、Mg元素在已定取值范围内变化时，σb.300℃的变化均十分缓慢，试验重点确定Mn元素范围（0．2％～0．31％或0．51％～0．60％），以此来保证所得σb.300℃完全满足活塞合金在使用性能上对高温强度的要求，且经拟合方程计算得出最低σb.300℃值约为127．39MPa。A experimental scheme of Cu, Mg and Mn elements which effect the high temperature tensile property of AI-24% Si piston alloy was designed using the orthogonal test method, and a quadratic fitting equation was established between the high temperature tensile strength （σb.300℃） and the three elements. The result indicates for the alloy modified by the compound modification of P,Re and Sr; while the variation of Cu,Mg and Mn within a certain range, σb.300℃ has a little change slow. The content of Mn （0.2% --- 0.31% or 0.51% --- 0.6%） was mainly determined in order to ensure the obtained σb.300℃ which can meet the requirements of high temperature strength for piston alloy. The minimum σb.300℃ minimum is 127.39 MPa calculated from the quadratic fitting equation.

关 键 词：活塞合金 正交回归分析 高温抗拉强度 

分 类 号：TG146.21[一般工业技术—材料科学与工程]