钨极电弧熔敷作用下原位陶瓷涂层温度场的数值模拟  

Numerical Simulation of Temperature Filed of In-situ Ceramic Coating under Tungsten Electrode Arc Cladding

作　　者：闫文青[1] 康兆平 余黎杰 彭康 邹太勇 YAN Wenqing;KANG Zhaoping;YU Lijic;PENG Kang;ZOU Taiyong(Key Laboratoty for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China)

机构地区：[1]武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室

出　　处：《热加工工艺》2018年第6期173-176,共4页Hot Working Technology

基　　金：武汉科技大学创新基金项目(16ZRA007)

摘　　要：在钛合金表面原位形成陶瓷复合涂层可以提高其表面耐磨性,钨极氩弧熔敷法由于电弧温度高、钨极的载流能力较低而适合于钛合金表面改性。在钨极氩弧熔敷过程中,熔池温度场的分布对于涂层成分具有重要影响。本文对电弧热、熔化潜热和化学反应热进行叠加构建了热源模型,采用有限元软件MARC对不同时刻的熔池温度场分布和熔池形状进行模拟,并进行了实验验证。结果表明：热源模型和几何模型是有效的,模拟结果可以用于定量和定性分析。The wear resistance of titanium alloy improves by preparing in-situ ceramic coatings on its surface. The method of tungsten arc cladding is fit for the surface modification of titanium alloys due to high arc temperature and lower current carrying capacity of tungsten electrode. During tungsten arc cladding, the distribution of temperature filed of melting pool has important effects on the composition of the coatings. Therefore, the heat resource model was constructed based on the superposition of arc heat, latent heat of fusion and chemical reaction. The distribution of temperature field of melting pool and the shape of melting pool at different time was simulated by using finite element software MARC, and the experiment verification was done. The results show that the resource model and geometric model are valid. The simulation results can be used for quantitative and qualitative analysis.

关 键 词：电弧熔敷 陶瓷涂层 温度场 数值模拟 

分 类 号：TG174[金属学及工艺—金属表面处理]