脉冲激光切丝工艺制备球形钼粉  

Spherical molybdenum powders prepared by pulse laser wire cutting

作　　者：王世泽 赵兴科[2] 赵增磊 吴平 WANG Shi-ze;ZHAO Xing-ke;ZHAO Zeng-lei;WU Ping(Shunde Graduate School,University of Science and Technology Beijing,Foshan 528399,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学顺德研究生院,佛山528399 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《粉末冶金技术》2022年第3期232-238,共7页Powder Metallurgy Technology

摘　　要：为了获得高性能的实心球形颗粒钼粉原料,采用脉冲激光切丝法制备球形钼粉。通过筛分、光学显微镜和扫描电子显微镜等研究了所制备钼粉的粒度、形貌、微观组织等物理性能。结果表明,脉冲激光切丝法制备的钼粉形貌呈球形或近球形,表面光滑,没有卫星颗粒或颗粒粘接聚集现象。在试验工艺参数范围内,90%以上的钼粉颗粒粒径在150μm以上,其中粒径在150~300μm范围的颗粒占比最大,超过60%。粒径400μm以下的钼粉通常是内部致密的,而在一些粒径较大的钼粉颗粒中出现内部孔洞,并初步分析了钼粉颗粒及其内部孔洞的形成机制。To obtain the high performance solid spherical molybdenum powder raw materials,the spherical molybdenum powders were prepared by the pulse laser wire cutting.The particle size,morphology,microstructure,and other physical properties of the molybdenum powders were studied by sieving,optical microscope,and scanning electron microscope,respectively.The results show that the morphology of molybdenum powders prepared by the pulse laser wire cutting is spherical or nearly spherical,and the surface is smooth without the satellite particles or particle aggregation.In the range of the experimental process parameters,more than 90%molybdenum powder particles are over 150μm in size,and the particles in the range of 150~300μm account for the largest proportion,more than 60%.Molybdenum particles with the particle size less than 400μm are usually internally dense,while the internal holes appear in some larger particles.The formation mechanism of molybdenum particles and internal holes is preliminarily analyzed.

关 键 词：金属粉末 脉冲激光切丝 钼丝 球形钼粉 

分 类 号：TF123.1[冶金工程—粉末冶金] TG146.4[冶金工程—冶金物理化学]