论文部分内容阅读
建立了06Cr13Ni4Mo不锈钢热处理过程的三维有限元模型,模拟了试样在1050℃正火+630℃回火条件下的温度场和应力场。结果表明:初始冷却温度越高,冷却过程中心部和表面的温度差越大,产生的热应力越大。随着冷却温度的降低,心部和表面的温度差逐渐降低。试样的表面应力由外到内先减小后增大,呈V型变化规律。实验测量的残余应力与模拟值吻合较好。结果证明了有限元分析过程的有效性。
A three-dimensional finite element model of 06Cr13Ni4Mo stainless steel was established. The temperature field and stress field of the sample were simulated under the condition of 1050 ℃ normalizing and 630 ℃ tempering. The results show that the higher the initial cooling temperature, the greater the temperature difference between the center and the surface during cooling, and the greater the thermal stress is. As the cooling temperature decreases, the temperature difference between the heart and the surface gradually decreases. The surface stress of the sample decreases first and then increases from outside to inside, showing a V-shaped variation. The experimentally measured residual stress is in good agreement with the simulated value. The result proves the validity of finite element analysis.