工艺参数对激光快速成型Fe基合金组织与晶化行为的影响  

Influence of Process Parameter on Microstructure and Crystallization Behavior of Fe-Based Alloy Processed by Laser Rapid Forming

作　　者：王刚[1] 刘亚萍 吕云卓 徐海涛 张荣芸[1] 黄仲佳[1] Wang Gang;Liu Yaping;Lu Yunzhuo;Xu Haitao;Zhang Rongyun;Huang Zhongjia(Anhui Key Laboratory of High-Performance Non-Ferrous Metal Materials, Anhui Polytechnic University, Wuhu, Anhui 241000, China;School of Materials Science and Engineering, Dalian Jiaotong University, Dalian, Liaoning 116028, China)

机构地区：[1]安徽工程大学高性能有色金属材料省级重点实验室,安徽芜湖241000 [2]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《激光与光电子学进展》2018年第4期263-268,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51704001);安徽省重点研究与开发计划(1704a0902056)

摘　　要：利用激光成型技术制备了Fe基合金样品,研究了激光扫描速度对成型的Fe基合金组织与晶化行为的影响。结果表明,在一定激光功率下,随着扫描速度的增大,熔化区和热影响区内均发生了大面积的晶化,熔化区内的析出相的形貌和尺寸未发生明显的变化,而热影响区内的析出相的尺寸不断减小。采用Marc有限元软件模拟了激光快速成型过程,得到了各扫描速度下合金的熔化区和热影响区内的热循环曲线,分析了Fe基合金未能获得非晶相的原因。Fe-based alloys are prepared by the laser rapid forming technique, The influence of scanning speed on the microstructure and crystallization behavior of the formed Fe-based alloys is studied. The results show that, under a certain laser power, the large area of crystallization occurs both in the fusion zone and the heat affected zone with the increase of the scanning speed. The morphology and size of the precipitated phase in the fusion zone do not change obviously, however, the size of the precipitated phase in the heat affected zone decreases gradually. The laser rapid forming process is simulated by the Marc finite-element software, the thermal cycling curves in the fusion zone and the heat affected zone under different scanning speeds are obtained, and the reason why non-crystallization phase occurs for Fe-based alloys is analyzed.

关 键 词：激光技术 激光成型 FE基合金 熔化区 热影响区 热循环 

分 类 号：TG456.7[金属学及工艺—焊接]