锌基合金挤压型材的组织与性能  

Microstructure and properties of extruded profiles of zinc-based alloys

作　　者：林高用[1] 郑小燕[1] 曾菊花[1] 孙利平[1] 

机构地区：[1]中南大学材料科学与工程学院

出　　处：《中南大学学报（自然科学版）》2008年第2期246-250,共5页Journal of Central South University:Science and Technology

基　　金：云南省省院省校科技合作计划项目(2003UABAB05A050);中南大学学生创新性实验计算项目(LC07117)

摘　　要：对自行研制的一种锌基合金(可取代HPb59-1黄铜)的挤压型材组织与性能进行研究,并与某厂研制的一种锌基合金进行比较。结果表明:自行研制的锌基合金在挤压温度为350℃,挤压比为17.5和挤出速度为20mm/s的挤压工艺下可顺利实现挤压成形;挤压所得表链型材抗拉强度达到375MPa,切削性能良好,组织致密,表面质量好;挤压后合金组织为完全再结晶组织,其局部还出现再结晶晶粒聚集长大的现象;在人造海水中腐蚀30d后没有明显的晶间腐蚀倾向。The extruded profile＇s microstructure and properties of a self-developed zinc-based alloy which can replace HPb59-1 brass were studied and compared with a zinc-based alloy prepared in a factory. The results show that the feasible extrusion process of the self-developed zinc-based alloy is obtained when heated to 350 ℃, extruded with a ratio of 17.5, extruded at the rate of 20 ram/s; the tensile strength σb of the extruded chain profile is 375 MPa. The profile has good cutting performance, dense microstructure and excellent surface quality. Complete re-crystallization and local grain coarsening take place in the extruded profile; especially, there is no obvious tendency of inter-crystalline corrosion after exposed in manmade sea water for 30 d.

关 键 词：锌基合金 挤压型材 切削性能 抗拉强度 显微组织 腐蚀 

分 类 号：TG146.1[一般工业技术—材料科学与工程]