中南大学学报（自然科学版）2011，Vol.42Issue(11)：3296-3302,7.
含Bi易切削变形Zn-Al合金显微组织与性能
Microstructure and properties of free-cutting deformation Zn-Al alloy containing Bi
摘要
Abstract
The microstructure and properties of self-developed free-cutting deformation Zn-Al alloys containing Bi in the cast and extruded conditions were investigated by mechanical tests, optical microscopy, scanning electron microscopy, energy spectrum analysis, machinability tests and plating performance tests. The results show that the machinability of the Zn-Al alloy can be improved by needle dispersion distributed low-melting Bi phase. The plating performance of free-cutting deformation Zn-Al alloys gets worse when the content of Bi is more than 0.5% (mass fraction). This self-developed Zn-10%Al-0.3%Bi-X alloy has excellent comprehensive properties, such as free-cutting without blistering when electroplated, tensile strength and elongation reaches 351 Mpa and 18% respectively. So it can be used to replace some copper alloys as bearing, handware, household appliance and other structural parts.关键词
变形锌合金/Bi/显微组织/切削性能Key words
deformation zinc alloy/ Bi/ microstructure/ machinability分类
矿业与冶金引用本文复制引用
林高用,孙和平,曾菊花,王莉..含Bi易切削变形Zn-Al合金显微组织与性能[J].中南大学学报（自然科学版）,2011,42(11):3296-3302,7.基金项目
国家"十一五"科技支撑计划项目(2009BAE71B01) （2009BAE71B01）
