摘要
在Cu-20%Zn黄铜中添加磷,以期在不经复压复烧的条件下制备不含铅的具有良好力学性能的黄铜。研究磷的添加量（质量分数,0~0.8%）对合金力学性能和微观组织的影响。结果表明：不加磷的Cu-20Zn黄铜试样的烧结密度（8.16 g/cm3）、硬度（87.7 HRH）、抗拉强度（244 MPa）、屈服强度（112 MPa）和冲击功（89.2 J）等均达到了日本工业标准JIS的要求,伸长率略低（25.4%）。添加磷后,合金的硬度、抗拉强度、屈服强度和冲击功都明显下降,但含0.5%P和0.6%P的合金伸长率高于日本JIS标准,分别达到30.2%和28.0%。所以一般只有在对黄铜伸长率有特殊的高要求时,才向合金中添加磷。磷主要聚集于烧结体晶界,使晶粒尺寸明显增大,由8μm左右增大到30μm以上。
Cu-20Zn brass samples were prepared using a powder metallurgy（PM） method.The effects of 0~0.8%（mass fraction the same below） phosphors（P） on the properties and microstructure of PM Cu-20Zn brass were investigated by the comparison.The results show： The density（8.16 g/cm3）,hardness（87.7 HRH）,ultimate tensile strength（244 MPa）,yield strength（112 MPa） and Charpy impact energy（89.2 J） of the studied Cu-20Zn brass specimen have surpassed the Japanese industrial standard（JIS）.But its elongation was a little low（25.4%）.After addition of P,the hardness,ultimate tensile strength,yield strength and Charpy impact energy are decreased apparently however the brasses containing 0.5%P and 0.6%P respectively show high elongation,which are 30.2% and 28.0% respectively and also surpass the JIS.Generally,addition of P is necessary only when the especially high elongation of the brass is needed.P gathers mostly in grain boundaies and makes grain size increase much from 8 μm to 30 μm.
出处
《粉末冶金材料科学与工程》
EI
2011年第5期755-759,共5页
Materials Science and Engineering of Powder Metallurgy
关键词
粉末冶金
黄铜
磷
力学性能
微观组织
powder metallurgy
brass
phosphors
mechanical properties
microstructure
