ZL109活塞合金的成分优化  

Composition Optimization of ZL109 Piston Alloy

作　　者：马建辉[1] 任波[1,2] 郭鹏[3] 

机构地区：[1]河南工程学院机械工程学院 [2]郑州大学材料科学与工程学院 [3]河南机电职业学院机械工程系

出　　处：《特种铸造及有色合金》2014年第7期757-760,共4页Special Casting & Nonferrous Alloys

基　　金：郑州市科技发展计划资助项目(20130803)

摘　　要：研究了合金化元素Cu、Mn和Ni对ZL109活塞合金组织和力学性能的影响。结果表明,Cu的加入促进了条带状Al3CuNi相和骨骼状的Al7Cu4Ni相的析出,合金室温和高温抗拉强度逐步增加;Ni的加入也可促进Al3CuNi相和Al7Cu4Ni相的析出,但合金室温和高温力学性能增幅不大;Mn含量为0.15%时,合金的室温和高温抗拉强度最高,继续提高Mn含量到0.30%时,合金的抗拉强度反而下降,这与含Mn相的形态及其高温稳定性不同有关。综合考虑认为,ZL109活塞合金中Cu含量为1.0%,Ni含量为0.7%,Mn含量为0.15%时,合金综合性能最好。Influences of alloying elements Cu, Mn and Ni on the microstructure and mechanical properties of ZL109 piston alloy were investigated. The results show that Cu can promote the precipitation of stripped A13 CuNi and skeleton like A17 Cu4 Ni phases, which are responsible for gradually increase of ten- sile strength of alloy at room temperature and 300 ℃. Ni can also promote the precipitation of A13CuNi and A17Cu4Ni phases, however, the change of mechanical properties at room and high temperature can be ignored. With the Mn content of 0.15%, the tensile strength at room and high temperature reaches peak value. With increasing Mn to 0.30%, the tensile strength is decreased, which may be relate with the morphology of Mn-containing phase and its high temperature stability. It can be considered that the optimization compositions are 1.0% Cu, 0.7% Ni, and 0.15% Mn in ZL109 piston alloy.

关 键 词：ZL109 活塞合金 成分优化 显微组织 拉伸性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]