选区激光熔化WC-12Co单道成型工艺参数优化  

Optimization of single-pass forming parameters for selective laser melting WC-12Co

作　　者：贾娜[1] 余本军 张纯朴[1] 王春昕 刘九庆[1] JIA Na;YU Benjun;ZHANG Chunpu;WANG Chunxin;LIU Jiuqing(College of Mechanical and Electrical Engineering,Northeast Forestry University,Harbin 150001,China)

机构地区：[1]东北林业大学机电工程学院,哈尔滨150001

出　　处：《激光技术》2025年第1期113-120,共8页Laser Technology

基　　金：国家重点研发计划资助项目(2022YFD2202105)。

摘　　要：为了实现硬质合金WC-12Co金属粉末制品整体成型制造,采用选区激光熔化(SLM)技术对WC-12Co合金粉末单道熔池成形进行了理论分析和实验验证,取得了单道熔池成形的最佳工艺参数。结果表明,激光扫描速率和功率的不同组合影响了单道熔池的连续性和形貌,当激光功率为340 W、扫描速率为600 mm/s、扫描间距为60μm/道、铺粉厚度为40μm/层时,单道熔池形貌达到了最佳状态,呈现出稳定连续的“鱼鳞状”形貌,成形对象单层裂纹最少;在单道成形过程中,单道熔池截面出现了W元素聚集的现象,该现象是导致成形WC-Co块体各向异性的重要原因。该研究结果对硬质合金WC-12Co金属粉末制品的成形起到了决定性的作用。In order to realize the integral forming of tungsten carbide WC-12Co metal powder products,the selective laser melting(SLM)technology was used for the theoretical analysis and experimental verification of the single-pass melting pool forming of WC-12Co alloy powder.The results show that:Different combinations of laser scanning rate and power affect the continuity and morphology of the single pass molten pool.When the laser power is 340 W,the scanning rate is 600 mm/s,the scanning interval is 60μm/pass,and the powder thickness is 40μm/layer,the single pass molten pool morphology reaches the best state,presenting a stable and continuous“fishscale”morphology.The single layer cracks of the forming object are the least.In the process of single pass forming,W element aggregation occurs in the section of single pass melting pool,which is an important reason for the anisotropy of formed WC-Co block.This research result plays a decisive role in the forming of cemented carbide WC-12Co metal powder products.

关 键 词：激光技术 硬质合金单道成形 选区激光熔化 碳化钨粉末 

分 类 号：TG156.99[金属学及工艺—热处理] TG135.5[金属学及工艺—金属学]