东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (4): 512-516.DOI: 10.12068/j.issn.1005-3026.2015.04.013

• 材料与冶金 • 上一篇    下一篇

PbS对高铅锡青铜合金离心铸造微观组织的影响

刘越1， 陈超1， 齐占军1， 吕文玲2   

  1. (1.东北大学 材料与冶金学院， 辽宁 沈阳110819； 2.鞍钢重型机械有限责任公司， 辽宁 鞍山114021)
  • 收稿日期:2014-03-17 修回日期:2014-03-17 出版日期:2015-04-15 发布日期:2014-11-07
  • 通讯作者: 刘越
  • 作者简介:刘越(1960- )，男，辽宁沈阳人，东北大学教授.
  • 基金资助:
    辽宁省科技创新重大专项(201404001)；沈阳市科技计划项目(F13-316-18).

Effect of PbS on Microstructure of High Lead Tin-Bronze Alloy by Centrifugal Casting

LIU Yue1， CHEN Chao1， QI Zhan-jun1， LYU Wen-ling2   

  1. 1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China; 2. Angang Heavy Machinery Co.， Ltd.， Anshan 114021， China.
  • Received:2014-03-17 Revised:2014-03-17 Online:2015-04-15 Published:2014-11-07
  • Contact: LIU Yue
  • About author:-
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摘要： 采用离心铸造方法制备了高铅锡青铜合金，研究了PbS对高铅锡青铜合金离心铸造微观组织及硬度的影响.研究结果表明，未加PbS时铅偏析严重，铅呈块状及条带状集中分布；加入PbS后，形成Cu2S化合物均匀分布在晶界上成为结晶核心，Cu2S不断增加连络成网络状，阻碍铅的偏析；随着PbS质量分数的增加，铅偏析程度减小，晶粒逐渐细化，硬度增加；加入3.0%PbS时，铅偏析程度最小，铅分布均匀，晶粒得到细化.

关键词: 高铅锡青铜, 离心铸造, 偏析, 微观组织, 晶粒

Abstract: High lead tin-bronze alloy was produced by centrifugal casting method. The effects of PbS on microstructure and hardness of high lead tin-bronze alloy were studied. The results showed that in the alloy without PbS addition， the segregation of lead is serious， and the morphology is blocky or stripped. In the alloy with PbS addition， the compounds Cu2S are formed and distributed uniformly on grain boundaries， which are nucleation sites. The compounds Cu2S increase incessantly and form reticular structure， which hinder the segregation of lead. With increasing the mass fraction of PbS， the segregation of lead is reduced， the grains are refined gradually and the hardness increases. The segregation of lead is the smallest， the distribution of lead is the most homogenous and the grains are refined when 3.0% PbS is added.

Key words: high lead tin-bronze, centrifugal casting, segregation, microstructure, grain

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