摘要
经等离子重熔的Ａ１－１６Ｓｉ合金与电阻炉重熔的相比，组织有明显的细化效果：初晶Ｓｉ最大长度由１２０μｍ变为１０μｍ，共晶 Ｓｉ最大长度由 ７５ μｍ变为 ８ μｍ，并且这种细化效果随着放电电流和气流量的增大而增强，分析认为，造成组织细化的原因是由于等离子熔炼特殊的加热方式所致，等离子轰击作用能使熔体中保留遗传信息的原子团簇变小，微观结构更加均匀，
The microstructure of Al-16Si alloy is refined after plasma remelting. Primary Si size decreases from 120 μm to 10 μm and eutectic Si from 75 μm to 8 μm. Effect of refinement is more and more evident with increasing in electric current and argon flux. The reason for these phenomena is connected with heating manner of plasma arc: clusters in melt can be broken up by plasma bombardment and resultantly, the melt composition distribution becomes more uniform.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第7期689-692,共4页
Acta Metallurgica Sinica
