摘要
研究用连铸-挤压-冷拔的组合工艺生产一种含Bi的易切削黄铜棒，并用光学显微镜和X射线研究了该黄铜的显微组织，用拉伸试验机测定了该黄铜的抗拉强度和塑性。研究发现，该黄铜主要由α（Cu0.64Zn0.36）、β（CnZn）两相组成，Bi以单质的形式分布在晶界和相界上。冷拔使该黄铜强度增加（大于600MPa），塑性下降5％～9％。该黄铜完全可以取代现行的HPb59-1黄铜。
The captioned brass was induction melted, semi-continuously cast, hot extruded and cold drawn into rods. By means of optical microscope and XRD, it was found that the brass is composed of a （Cu0.64Zn0.36） and 13 （CuZn） and Bi is located on grain boundaries. The tensile strength of the brass increases （greater than 600 MPa） while the plasticity decreases （5% ～ 9%） after cold drawing. This brass can substitute HPb59-1 totally as a free-cutting brass.
出处
《上海有色金属》
CAS
2006年第3期3-5,20,共4页
Shanghai Nonferrous Metals
关键词
无铅黄铜
铋
显微组织
冷拔
力学性能
unleaded free-cutting brass
bismuth
microstructure
cold drawing
mechanical properties
