摘要
不锈钢经激光表面熔凝处理后，其组织形态发生了显著的变化，在表面熔凝层中分别出现白亮带、细胞晶、胞枝结构以及紊乱枝晶组织，对其形成原因进行了分析．在激光熔池中观察到典型的胞枝转变，对转变的临界条件进行了深入研究，结果表明：实验确定的胞枝转变临界速度与最近提出的ＢＪＴ模型的预言值符合得较好．
The microstructure features of stainless steel have changed remarkably after laser surface remelting and solidification. Light band, fine cell, cell-dendrite structure and disordered dendrite are found in the surface layer, meanwhile, the causes for their formation have been analyzed. The typical cell-to-dendrite transition is observed at the center of laser melt pool, and a detailed investigation on the transition conditions shows that the critical transition velocity determined by experiment agrees well with the prediction of recent BJT model.Correspondent: PAN Qingyue, Lab.403, Northwestern Polylechnical University, Xi'an 710072
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1996年第7期718-722,共5页
Acta Metallurgica Sinica
基金
中国工程物理研究院院外基金
国家自然科学基金
关键词
激光表面熔凝
不锈钢
凝固
组织
laser surface remelting and solidification, stainless steel, cell-to-dendrite transition
