外场对水平连铸Al-1Si合金组织细化的影响  

Effect of Outfield Treatment on Structure Refinement of Horizontal Continuous Casting Al-1Si Alloy

作　　者：李捷[1] 郄喜望[2] 李廷举[1,2] 

机构地区：[1]大连理工大学三束材料改性国家重点实验室及材料科学与工程学院 [2]大连理工大学原材料制备重点实验室

出　　处：《特种铸造及有色合金》2008年第S1期143-145,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金项目(50474055、50674018)

摘　　要：研究了电磁场和超声场对Al-1Si合金晶粒细化的影响。研究结果表明在结晶器外部施加电磁场,随着电流强度的增加,合金的晶粒得到了细化,但当电流增大到120A时,晶粒却发生了粗化;对金属熔体施加超声场以后,晶粒得到了明显的细化,平均晶粒度由94.1μm降为31.2μm。对外场作用下水平连铸Al-1Si合金的组织细化机理进行了探讨。The effect of electromagnetic field and ultrasonic field on the grain refinement of horizontal continuous casting Al-1Si alloy microstructure was investigated. Experimental results show that: with electromagnetic field outside the mold, the solidification structure of the alloy is refined with the increase of current, but when the current increases to 120 A, the microstrucrure becomes coarse; with 1000w power ultrasonic field, the solidification structure is refined and the grain size reduces from 94.1 μm t...

关 键 词：电磁场 超声场 水平连铸 Al-1Si合金 晶粒细化 

分 类 号：TG249.7[金属学及工艺—铸造]