摘要
利用ANSYS软件建立激光重熔超音速火焰喷涂(HVOF)层的有限元模型,进行温度场的仿真模拟,考察激光重熔工艺参数对温度场分布的影响,结果表明单向匀速扫描过程中引起的热量积聚,通过双向扫面、变速扫描等方式可以解决。通过实验验证了模型的有效性,分析发现激光重熔能有效改善超音速火焰喷涂涂层的质量,根据仿真结果和试验可确定合理的激光重熔工艺参数。最后,讨论了激光工艺参数对涂层组织和性能的影响。
Finite element analysis software ANSYS is used to establish a 3-D finite element model to carry out the thermal analysis of laser re-melting HVOF sprayed Cr3 C2-25 % CrNi coatings on 316L steel substrate. Temperature distributions under different laser processing parameters were studied. The simulation indicated that the unidirectional canning of laser was bond to result in energy accumula- tion, which could be solved by changing scanning modes. Model validation was also verified by experi- ments. The method of laser re-melting was found to be effective in improving the quality of HVOF coatings. Reasonable technological parameters can be gained according to the simulation results and the experiments. Finally, the effects of technological parameters on the microstructure and properties of coatings were discussed.
出处
《电加工与模具》
2011年第5期33-37,共5页
Electromachining & Mould
基金
国家自然科学基金资助项目(50375096)
