【摘要】 在保持传统黄铜易切削条件下,通过加入Bi代替Pb并添加少量RE获得了易切削黄铜。试验表明:绝大多数的Bi以单质游离态分布在β相内,RE元素的加入一方面使黄铜组织细化,另一方面使更多的Bi颗粒存在于β相内,从而提高切削性能,最终得到易切削的且表面光洁的黄铜。更多还原

【Abstract】 A new free-cutting brass was developed by substituting Pb for Bi with trace Re addition, which keeps free-cutting ability of traditional brass. The results show that major Bi is free state is uniformly distributed in β phase, and a few Bi distributed about crystal boundary make more and more Bi particle, which improves the cutting performance. It is concluded that the Bi can completely replace Pb, obtaining free-cutting brass.更多还原