挤压铸造BH122活塞合金的显微组织与力学性能  

Microstructure and Mechanical Properties of BH22 Piston Alloy in Squeezing Casting

作　　者：钱钊[1] 刘相法[1] 魏作山 李勇铖 王丽艳 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室 [2]山东滨州渤海活塞股份有限公司

出　　处：《特种铸造及有色合金》2008年第1期40-42,共3页Special Casting & Nonferrous Alloys

基　　金：“泰山学者”建设工程专项经费资助项目;国家杰出青年科学基金项目(50625101);教育部科学技术研究重点项目(106103);山东省自然科学基金资助项目(Z2004F03)

摘　　要：研究了经挤压铸造BH122活塞合金的显微组织和力学性能。结果发现,挤压铸造BH122合金组织中共晶Si呈粗棒或块状分布,不同于典型重力铸造BH122合金中的针片状;挤压铸造可促进Al9FeNi相的大量析出。经挤压铸造后,合金的抗拉强度和硬度均有明显提高,分别可达300.3MPa和HB120。Microstructure and mechanical properties of BH22 piston alloy in squeezing casting have been investigated.It is revealed that the eutectic Si phase in microstructure of squeezing casting BH22 alloy is characterized by the coarse bar or block,which is different from acicular structure in gravity-casting BH22 alloy.In addition,the amounts of creation of Al9FeNi phase in the alloy can be observed in squeezing casting.Compared with those of gravity die casting ones,the tensile strength and hardness of squeezing casting BH22 piston alloy can be increased evidently,reaching up to 300.3 MPa and HB120,respectively.

关 键 词：挤压铸造 AL-SI合金 活塞 共晶 

分 类 号：TG249.2[金属学及工艺—铸造]