不同保护气体对选区激光熔化成形WC-12Co硬质合金组织性能的影响  

Influence of Different Protective Gases on the Microstructure and Performance of WC-12Co Cemented Carbide Formed by Selective Laser Melting

作　　者：贾娜[1] 张纯朴 王春昕 余本军 刘九庆[1] JIA Na;ZHANG Chun-pu;WANG Chun-xin;YU Ben-jun;LIU Jiu-qing(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150001,China;College of Mechanical and Electrical Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学机电工程学院,黑龙江哈尔滨150001

出　　处：《稀有金属与硬质合金》2025年第1期119-124,共6页Rare Metals and Cemented Carbides

基　　金：国家重点研发计划项目(2022YFD2202105)。

摘　　要：采用氮气和氩气两种保护气体通过选区激光熔化成形WC-12Co硬质合金,采用X射线衍射仪、扫描电子显微镜-能谱仪及洛氏硬度计分析了成形WC-12Co硬质合金的物相组成、组织形貌、元素分布及硬度。结果表明,与氮气作为保护气体相比,氩气中成形的WC-12Co硬质合金具有孔洞少、晶粒度小、硬度高的优势。本文为后续选区激光熔化成形WC-12Co硬质合金保护气体的选择提供了参考。WC-12Co cemented carbide was formed by selective laser melting using two protective gases of nitrogen and argon.The phase composition,microstructure,element distribution and hardness of the formed WC-12Co cemented carbide were analyzed by X-ray diffractometer,scanning electron microscopeenergy dispersive spectrometer and Rockwell hardness tester.The results show that compared with nitrogen as the protective gas,WC-12Co cemented carbide formed in argon has the advantages of few pores,small grain size and high hardness.It provides a reference for the selection of protective gas for subsequent selective laser melting forming of WC-12Co cemented carbide.

关 键 词：选区激光熔化 硬质合金 保护气体 硬度 晶粒度 

分 类 号：TG135.5[一般工业技术—材料科学与工程]