40Cr合金表面等离子熔覆温度场的数值模拟  

Simulation of Temperature Field in the Cladding Coated on 40Cr Alloy by the Plasma Transferred Arc

作　　者：毕晓勤[1] 杨仲磊[2] 

机构地区：[1]河南工业大学材料科学与工程学院,郑州450052 [2]郑州机械研究所,郑州450052

出　　处：《中国表面工程》2009年第3期43-48,共6页China Surface Engineering

基　　金：河南省科技攻关项目(2009A430003)

摘　　要：在40Cr合金钢表面等离子熔覆Ni–Cr合金涂层,应用Ansys进行等离子熔覆温度场的数值模拟。模拟结果表明:模拟所得熔池尺寸与与实测的数据较为接近,表明所建模型具有一定的适用性。随着远离熔池的距离增加,熔池前方温度下降较为剧烈,熔池后方的则较为缓慢,在相等的距离上温度变化的幅度从中心向下部以及从中心向外侧均逐渐变缓。熔覆时温度梯度可高达到5.9×106℃/s,温度场呈现准稳态分布,各节点在滞后一定时间之后均达到最高温度。Ni-Cr cladding was coated on 40Cr alloy by the PTA （plasma transferred arc）. The cladding temperature field was simulated by Ansys. The results show that the simulation size of the weld pool is approximate to the actual size. This indicates that the thermal FEA model has a certain degree of applicability. With the increase of the distance away from the welding pool, the temperature in the front of the welding pool decreases intensely and the temperature at the back of the welding pool decreases slowly. The temperature in the same distance varies slowly from the center to the bottom and the lateral side. The maximum temperature gradient can attain to 5.9×10^6°C/s. The cladding temperature field appears the quasi-steady distribution The temperature of each node attains to the maximum after delaying a period.

关 键 词：等离子 熔覆 温度场 数值模拟 

分 类 号：TG14[一般工业技术—材料科学与工程] TN2[金属学及工艺—金属材料]