基于CA-FE法的Cu-Cr-Zr-Ag合金凝固组织模拟  

Simulation of Solidified Microstructures of Cu-Cr-Zr-Ag Alloy Based on CA-FE Method

作　　者：王松[1] 谢明[1] 王塞北[1] 付作鑫[1] 沈月[1] 杜文佳[1] 溥存继[1] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,昆明650106

出　　处：《贵金属》2013年第3期50-54,共5页Precious Metals

基　　金：国家自然科学基金(51164015);云南省应用基础研究重点基金(2011FA026);云南省院所技术开发专项基金(2011CF012)资助

摘　　要：Cu-Cr系合金因其具有高强度、高导电以及优异的耐磨损性能,被广泛应用于电气化铁路接触导线、连续铸造结晶器内衬、异步牵引电动机转子以及耐磨电触头等。应用ProCAST软件中的CA-FE法对Cu-0.1Cr-0.08Zr-0.08Ag合金的凝固过程进行了模拟。结果表明:Cu-Cr-Zr-Ag合金凝固时,铸坯外表面沿模壁产生细晶薄层后,随之形成几何取向一致的柱状晶,而铸坯的心部则是由许多粗大的等轴晶所组成。随着冷却速度的加大,合金铸坯晶粒变得更为细小。模拟结果与实验结果基本吻合,检验了模型的正确性。Due to high strength, high conductivity and excellent wear resistance, Cu-Cr alloys are widely used in electrified railway contact wire, continuous casting crystallization lining, asynchronous traction motor rotor and wear-resistant electrical contacts. The simulation of the solidification structures in the solidification process of Cu-0.1Cr-0.08Zr-0.08Ag alloy was carried out by CA-FE method in ProCAST. The results show that, during solidification process, along the outer surface of the mold wall, the thin layer of fine grains is produced, and then the columnar grains with consistent geometric orientation are formed, while the core of the casting billet is composed of many equiaxed grains. With the increasing of cooling rate, the grains become smaller. The calculation results fit the experimental ones well, and then the validity of the model is tested.

关 键 词：金属材料 Cu-Cr-Zr—Ag合金 凝固模拟 CA-FE法 显微组织 

分 类 号：TG146.1[一般工业技术—材料科学与工程]