摘要
针对激光熔覆的特点,利用APDL参数化设计语言建立合理的三维瞬态温度场数值模型,综合考虑热源模型、相变潜热、材料属性变化、动态边界条件和动态接触热阻等。在镍基高温合金表面激光熔覆NiCoCrAl-Y2O3粉末片,计算结果与实验结果对比表明,该模型激光熔覆瞬态温度场的数值模拟结果和实验结果具有较好的吻合性,验证该模型的可靠性和正确性。
According to the characteristic of laser cladding, a reasonable 3-D thermo finite element （FE） model was built with APDL parametric design language in consideration of the heat source model, latent heat, changes of material attribute, dynamic boundary conditions and dynamic thermal resistance. An experiment of laser cladding was carried out to prepare NiCoCrAl -Y2O3 coatings on Ni-based high-temperature alloy. Comparison of the calculation results and experimental results shows that the numerical results agree well with the experimental ones, which verifies the reliability and validity of the model.
出处
《兵器材料科学与工程》
CAS
CSCD
2011年第4期23-27,共5页
Ordnance Material Science and Engineering
基金
航空科学基金(2010ZE52056)
南京航空航天大学基本科研业务费专项科研项目资助(2010ZE52056)
南京航空航天大学2010年度研究生创新基地(实验室)开放基金资助项目
关键词
激光熔覆
数值模拟
温度场
动态边界条件
动态接触热阻
laser cladding
simulation
temperature field
dynamic boundary conditions
dynamic thermal resistance
