金属材料激光立体成形技术  

Laser Solid Forming of Metal Powder Materials

作　　者：黄卫东[1] 李延民[1] 冯莉萍[1] 陈静[1] 杨海欧[1] 林鑫[1] 

机构地区：[1]西北工业大学凝固技术国家重点实验室,西安710072

出　　处：《材料工程》2002年第3期40-43,27,共5页Journal of Materials Engineering

摘　　要：对激光立体成形技术的基本原理、发展状况以及成形特性、凝固组织形成规律进行了系统深入的研究 ,发现要获得理想的成形效果 ,就必须对单层涂覆厚度、单道涂覆宽度、搭接率等主要参数进行精确控制。在工艺研究的同时 ,对成形件微观组织形成规律进行了研究 ,发现其内部组织主要由外延生长的细长枝晶构成 ,其枝晶一次间距在 10～30 μm之间。在进一步严格控制工艺条件的基础上 ,获得了具有定向乃至单晶组织的试样。结合成形特性方面的研究结果 ,通过总结优化工艺 ,获得了不同合金的激光立体成形件 ,成形件内部致密 ,表面质量良好 。The fundamental principle, development state, solidification microstructure and forming characters of laser solid forming (LSF) were investigated throughly It was found that to acquire idea forming result, the height, width and the overlap rate of the single cladding layer must be accurately controlled The forming principle of the microstructure was also studied during laser solid forming in this paper The microstructure of the sample was made up of thin and long epitaxial growth dendrites, the primary spacing of which is about 10~30μm The directional solidification microstructure or even single crystal was obtained based on the rigid processing characters control Combining the research results of the forming character, the samples with different metal were obtained by using optimized processing characters The inner part of the sample wa dense, the surface quality was fine and was free of defect

关 键 词：金属材料 激光立体成形 工艺特性 显微组织 

分 类 号：TG39[金属学及工艺—金属压力加工] TF124[冶金工程—粉末冶金]