块体铁基非晶合金的激光粉末床熔融成形工艺研究  

Research on the Laser Powder Bed Fusion Process of Fe-based Bulk Amorphous Alloys

作　　者：何秀麟 杨强 王富[1,2] 李涤尘 封国宝[3] HE Xiulin;YANG Qiang;WANG Fu;LI Dichen;FENG Guobao(School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710049,China;State Key Laboratory for Manufacturing System Engineering,Xi'an Jiaotong University,Xi'an 710054,China;National Key Laboratory of Science and Technology on Space Microwave,China Academy of Space Technology,Xi'an 710100,China)

机构地区：[1]西安交通大学机械工程学院,陕西西安710049 [2]西安交通大学精密微纳制造技术全国重点实验室,陕西西安710054 [3]中国空间技术研究院西安分院,空间微波通信全国重点实验室,陕西西安710100

出　　处：《电加工与模具》2024年第6期40-45,共6页Electromachining & Mould

基　　金：中国博士后科学基金项目(2021M692555);中央高校基本科研业务费专项资金项目(xzy012023145);陕西省秦创原“科学家+工程师”队伍建设项目(2023KXJ-266)。

摘　　要：大块复杂结构铁基非晶合金成形条件较为苛刻。采用正交试验法研究了激光功率、扫描速率及扫描间距等工艺参数对Fe_(55)Cr_(25)Mo_(16)C_(2)B_(2)铁基非晶合金成形质量的影响,获得了优化的工艺参数,探究了激光粉末床熔融成形铁基非晶合金的裂纹产生机制,测试了不同工艺参数成形铁基非晶合金的显微硬度、非晶率、压缩性能及断口微观形貌。结果表明,采用最佳成形工艺参数制备的Fe_(55)Cr_(25)Mo_(16)C_(2)B_(2)非晶合金具有高显微硬度,但仍存在孔隙、裂纹缺陷及晶化现象。There is a serious challenge to fabricate the large and complex Fe-based amorphous alloy,due to the harsh forming conditions of amorphous alloys.The orthogonal experimental method was employed to investigate the effects of process parameters,such as laser power,scanning speed,and scanning spacing on the forming quality of Fe_(55)Cr_(25)Mo_(16)C_(2)B_(2) amorphous alloys in this study.The optimized process parameters were obtained,and the mechanism of crack formation of Fe-based amorphous alloys in the laser powder bed fusion(LPBF)process was studied.The microhardness,amorphous rate,compressive properties,and fracture micromorphology of Fe-based amorphous alloys prepared by different process parameters were tested.It was found that the Fe_(55)Cr_(25)Mo_(16)C_(2)B_(2) amorphous alloys prepared with the optimal process parameters exhibits a high microhardness,however,the defects such as pores and cracks,and the crystallization phenomena still existed.

关 键 词：激光粉末床熔融 铁基非晶合金 非晶率 显微硬度 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]