含铋黄铜的组织和性能研究
赵强1，张元华1，张银海1，李化芳1
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作者单位：河北机电职业技术学院
中文关键字：含铋黄铜；易切削；脱锌
英文关键字：Bi-brass;free cutting;Dezincification
中文摘要：本文采用铸造-拉拔的方法研究了以铋、锡和铝代替铅的环保黄铜棒。利用光学显微镜，扫面电镜等手段研究了含铋黄铜的微观组织和脱锌后组织，并对其力学，摩擦系数和切削性能进行了研究。结果表明：Bi和Pb一样以独立的第三相存在于α相和α相界处，Sn固溶于基体中，强化了晶界，改善了Bi 的形状，并且阻滞了α相，与Cu、O等元素构成了致密的保护膜，阻止了基体Zn的溶解，提高了含铋黄铜的耐蚀性能。
英文摘要：A new enviromental friendly cutting brass containing bismuth instead of lead was studied by casting and hot-drawing.The microstructure of studied alloy was observed by optical microscope ，scanning electron microscope and the mechanical,dezincification，Friction coefficient and cutting properties were studied.The results show that Bi existed in the α phase and α phase boundary like Pb as an independent third-phase;Sn is solid soluted in the matrix ,and enhanced grain boundary,and improving the shape of the Bi.Besides Sn with Cu, O, etc. elements constituted a compact protective film to prevent dissolution of the matrix Zn ,and improved the corrosion resistance of brass containing bismuth.