金属凝固组织的脉冲磁场细化技术  

Pulse Magnetic Field Refinement of Solidification Structure of Metals

作　　者：闫猛[1] 宋长江[1] 翟启杰[1] 

机构地区：[1]上海大学上海市现代冶金及材料制备重点实验室,上海200072

出　　处：《现代铸铁》2008年第6期32-36,共5页Modern Cast Iron

基　　金：国家自然科学基金重点项目(50734008);国家重点基础研究发展规划项目(2004CB619107);长江学者和创新团队发展计划(IRT0739)。

摘　　要：介绍了脉冲磁场对纯金属、低熔点合金和高熔点铁基材料凝固组织的影响。认为脉冲磁场细化纯铝、1Cr18Ni9Ti奥氏体不锈钢的凝固组织时,存在一个最佳磁场强度值;而脉冲频率对纯铝凝固组织的细化效果影响较小;随着磁场强度的增大,纯铜的凝固组织逐渐细化;脉冲磁场能使灰铸铁凝固组织细化,石墨片的宽度减少。指出脉冲磁场细化凝固组织的机理尚无统一认识,在一定程度上限制了该技术的工业应用。The influence of pulse magnetic field on the solidification structures of pure metals, alloys with low melting point and Fe-base alloys with high melting point was described. It was considered that, when using the pulse magnetic to refine the solidification structures of the pure aluminium and 1Cr18Ni 9Ti austenite stainless steel, there is an optimum intensity value of the magnetic field; and the influence of the pulse frequency on the refining effect of the solidification structure of the pure aluminium is relatively not obvious; with increasing of the magnetic intensity, the solidification structure of the pure copper gradually becomes finer; the pulse magnetic field can refine the solidification structure of gray irons, and reduce the width of their graphite flakes. It was pointed out that, at present, there is still no consistent viewpoint on the pulse magnetic field refining mechanism of the solidification structure that restricts in some degree the usage of this technique in the industry production.

关 键 词：脉冲磁场 凝固组织 晶粒细化 

分 类 号：TG249.9[金属学及工艺—铸造]