激光熔凝过程中低碳钢组织的形成及熔凝组织加热转变规律  

Law of Microstructural Formation of Low Carbon Steel in Laser Melting Process and Heating Transformation of the Melted Microstructure

作　　者：徐子文[1] 黄正[1] 阮中建[1] 

机构地区：[1]北京航空航天大学材料科学与工程学院

出　　处：《金属热处理》2003年第10期22-25,共4页Heat Treatment of Metals

基　　金：国家自然科学基金 (5 9970 0 4 );航空基础科学基金(0 1H5 10 0 4 )

摘　　要：基于激光熔凝处理的一维热场模型和金相分析 ,研究了低碳钢在激光熔凝过程中的组织形成规律。使用Gleeble15 0 0型热力模拟机实现对激光熔凝处理试样不同保温时间的控温加热 ,研究了激光熔凝组织的加热转变规律。Based on the one dimensional heat transfer model of laser melting process and metallographic analysis,the law of microstructural formation of low carbon steel in the laser melting process was analyzed.The laser melted specimens were heated in different holding time by Gleeble 1500 test simulator.Heating transformation of the laser melted microstructure was discussed.The fine equiaxed grains were obtained by a two step process of laser surface melting and post heat treatment.

关 键 词：激光熔凝 组织 热处理 

分 类 号：TG156.99[金属学及工艺—热处理]