摘要
采用熔铸、挤压的方法生产出以Bi和Sb代铅的环保型易切削黄铜棒材。利用扫描电镜、光学显微镜等手段对易切削黄铜的微观组织进行观察分析,并对其力学、脱锌和切削性能进行研究。结果表明:添加的Bi和Sb主要以单质或化合物方式存在于无铅黄铜的相内和相界处,Bi以单质颗粒存在于相界处,Sb以化合物形式存在于相内,这对提高合金切削性能有利;添加Bi和Sb黄铜的抗拉强度为478.9MPa,伸长率为15.1%,断面收缩率为29.3%,屈服强度大约为295MPa;添加Bi和Sb黄铜的切削性能比HPb59-1铅黄铜的优,合金的脱锌腐蚀性能良好,脱锌层厚度约为323μm。
A new environmental friendly cutting brass containing bismuth and stibium instead of lead was produced by casting and extruding. The microstructure of studied alloy was observed by scanning electron microscope （SEM） and optical microscope （OM） and the mechanical, dezincification and cutting properties were studied. The results show that Bi and Sb are mainly distributed on grains and grainboundaries, and Bi on grainboundaries there are mainly simple substance Bi particles, Sb in grains are intermetallics containing stibium. The tensile strength, yield strength, elongation and variation of area of halfhard brass containing bismuth and stibium are 478.9 MPa, 295 MPa, 15.1% and 29.3% respectively. Corresponding to HPb59-1, the cutting property of brass containing bismuth and stibium is excellent. The brass containing bismuth and stibium shows excellent dezincification corrosion resistance, and the depth is 323μm.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第1期117-122,共6页
Journal of Central South University:Science and Technology
基金
国家"十一五"重点课题支撑计划资助项目(2006BRE03B02)
关键词
易切削黄铜
Bi
SB
显微组织
性能
free-cutting brass
bismuth
stibium
microstructure
property
