摘要
用PHILIPS-XL30型扫描电子显微镜(SEM)观察了不同Sn含量对易切削Bi黄铜组织的影响,采用HY-1080型电子拉伸试验机测试了试样的力学性能,使用C6136卧式普通机床检测合金切削性能。结果表明,Sn能改变Bi的分布状态,使Bi从相界向α相迁移,从而有效改善材料性能;但Sn的含量超过2.0%时,合金中生成CuZnSn脆性电子化合物,使材料力学性能指标降低;合金的切削性能随着Sn含量的增加而提高。
Effects of different Sn additions on microstructure and mechanical properties of free-cutting Bi brass were investigated by Philips-XL30 SEM (scanning electron microscope) and HY-1080 electron tensile testing machine, and the cutting performance of the alloy was examined by C6136 horizontal lathe. The results show that Sn can effectively improve the property of the alloy by changing the distribution of Bi distribution to make Bi to move from the phase boundary into the α phase. However, when Sn content exceeds 2%, CuZnSn phase , a brittle electron compound, can be created in the alloy, resulting in the deterioration of mechanical properties. The cutting performance of the alloy is improved with increasing in Sn content.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2011年第3期288-290,196,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50974063)
江西省教育厅科技资助项目(GJJ09228)
关键词
易切削
Bi黄铜
组织
力学性能
Free-cutting, Bi Brass, Microstructure, Mechanical Properties
