激光熔覆生物陶瓷涂层温度场模拟  

Simulation on Laser Cladding Temperature Field of Bioceramic Coating

作　　者：张冬明[1] 鲍雨梅[1] 高海明[1] 许景顺 

机构地区：[1]特种装备制造与先进加工技术教育部/浙江省重点实验室(浙江工业大学),浙江杭州310014

出　　处：《轻工机械》2014年第2期77-81,共5页Light Industry Machinery

基　　金：国家自然科学基金资助项目(51105339);国家自然科学基金资助项目(51275471)

摘　　要：针对生物陶瓷涂层预置粉末式激光熔覆的特点,综合考虑接触热阻、材料物理性能参数、涂层厚度和激光吸收率等因素,建立了熔覆过程温度场的数值模型,对基体熔池尺寸和形状进行了数值计算,并与实验结果进行对比分析。结果表明,模型能较好地反映激光熔覆过程中的温度场分布。激光熔覆过程中,存在明显的热积累现象,且预置粉末层厚度对温度场影响较大。According to the characteristic of laser cladding with the feed way of pre-placing powder,the numerical simulation of temperature field was conducted in consideration of the thermal resistance,material attribute,coating thickness and laser absorptivity.Comparison of the experimental and calculation results in the way of molten pool depth,width and shape shows that the simulated results obtained by this model agree with the temperature field of laser cladding.The phenomenon of heat accumulation is remarkable during laser cladding.And the effect of pre-placing powders thickness on the temperature field is great.

关 键 词：激光熔覆 数值模拟 温度场 生物陶瓷 

分 类 号：TG156[金属学及工艺—热处理]