17-4PH不锈钢激光熔覆镍基碳化钨涂层数值模拟研究  

Numerical Simulation Study on Laser Cladding Nickel⁃based Tungsten Carbide Coating on 17⁃4PH Stainless Steel

作　　者：胡保珠 杜小妮 曹鹏 苏成明 王彦涛 张少雄 HU Baozhu;DU Xiaoni;CAO Peng;SU Chengming;WANG Yantao;ZHANG Shaoxiong(Xi'an Intelligent Remanufacturing Research Institute Co.,Ltd.,Xi'an 710016,China;Shaanxi Zhongzhan Testing Engineering Co.,Ltd.,Xi'an 710016,China)

机构地区：[1]西安智能再制造研究院有限公司,西安710016 [2]陕西中展检测工程有限公司,西安710016

出　　处：《材料导报》2023年第S02期492-496,共5页Materials Reports

摘　　要：采用双椭球热源,综合考虑了热传导、热对流、粉光相互影响、金属相变、凝固的相互作用,基于随温度变化的热物性参数,建立了17-4PH基体激光熔覆镍基碳化钨粉末的三维温度场流场数值模型,模拟不同激光功率和熔覆速度对温度场流场的影响,计算得出了熔覆过程温度场、速度场的瞬时变化规律。结果表明,随着激光功率的增加,熔池温度的峰值从1 850 K增加到2 210 K,熔池流速峰值从0.12 m/s增加到0.13 m/s。随着熔覆速度增加,熔覆层温度分布变化不大,但熔覆层厚度由649.117μm减小到313.759μm。研究结果为不锈钢激光熔覆镍基碳化钨成型提供相关理论依据。Using a double ellipsoid heat source,comprehensively considering the interaction of heat conduction,thermal convection,powder⁃light interaction,metal phase change,and solidification,based on the thermal physical parameters that change with temperature,a 17⁃4PH substrate laser cladding nickel⁃based tungsten carbide was established.The three⁃dimensional temperature field and flow field numerical model of the powder simulates the influence of different laser powers and cladding speeds on the temperature field and flow field,and the instantaneous change rules of the temperature field and velocity field during the cladding process are calculated.The results show that with the increase of laser power,the peak temperature of the molten pool increases from 1850 K to 2210 K,and the peak flow velocity of the molten pool increases from 0.12 m/s to 0.13 m/s.As the cladding speed increases,the temperature distribution of the cladding layer changes little,but the thickness of the cladding layer decreases from 649.117μm to 313.759μm.The research results provide relevant theoretical basis for the laser cladding of nickel⁃based tungsten carbide forming of stainless steel.

关 键 词：激光熔覆 17-4PH 数值模拟 MARANGONI效应 

分 类 号：TG174.4[金属学及工艺—金属表面处理]