CAJ | 학술논문

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恀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。
Cu-Cr계합금인기구유고강도、고도전이급우이적내마손성능，피엄범응용우전기화철로접촉도선、련속주조결정기내츤、이보견인전동궤전자이급내마전촉두등。응용ProCAST연건중적CA-FE법대Cu-0.1Cr-0.08Zr-0.08Ag합금적응고과정진행료모의。결과표명：Cu-Cr-Zr-Ag합금응고시，주배외표면연모벽산생세정박층후，수지형성궤하취향일치적주상정，이주배적심부칙시유치다조대적등축정소조성。수착냉각속도적가대，합금주배정립변득경위세소。모의결과여실험결과기본문합，검험료모형적정학성。
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.