摘要
利用微重力电磁模拟的方法 ,对过偏晶Cu 40Pb合金熔体的凝固进行了试验研究。研究表明 :在模拟微重力的环境下 ,施加的电磁力可使合金熔体在不混溶区内获得准失重状态 ,抑制了合金熔体中L2 (Pb)相产生的Stockes沉积效应 ,在凝固组织中得到熟化后粗大的α(Cu)枝晶 ,S(Pb)相分布在α(Cu)枝晶间 ,从而消除了该合金在凝固过程中出现的重力偏析现象。
The solidification simulation of Cu-40Pb hypermonotectic alloy has been carried out in microgravity elctromagnetic condition. The results showed that the Stockes deposition effects produced by L_2(Pb) phase can be restrained so that coarse α(Cu) dendrite after aging Pb phase distributed between α(Cu) dendrites can be obtained in solidified structure due to liquid alloy being in quasi-zero gravity in the immiscible interval when applying electromagnetic force under the circumstance of simulated microgravity. Subsequently, the specific gravity segregation during solidification process was eliminated.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2004年第3期22-23,共2页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50 1 71 0 55)
航空科学基金资助项目(0 1G530 4 6)
陕西省自然科学基金资助项目(2 0 0 0C0 2 )
西北工业大学博士创新基金项目(2 0 0 2 0 8)
关键词
微重力
电磁模拟
过偏晶Cu-Pb合金
偏析
Microgravity, Electromagnetic Simulation, Cu-Pb Hypermonotectic Alloy, Segregation
