T92/12Cr1MoV异种钢焊接温度场的数值模拟

重点介绍T92/12Cr1MoV焊接过程的三维有限元分析模型,得到了多层焊温度场的分布规律,同时通过有限元分析中的关键问题判断和检测,得出如下实验结果：距离焊缝越近的点,加热及冷却速度越快;预热温度提高,加热速度及高温停留时间变化不大,但峰值温度升高,且相变温度以上停留时间变长;焊接线能量增加,t8/5延长,而t8/5过长,促进晶粒长大,使韧性降低,t8/5过短,易生成淬硬组织,因此应严格控制焊接线能量。

Numerical simulation of temperature field for T92/12Cr1MoV dissimilar steel welding

Based on 3d finite element analysis model of the welding process for T92/12Cr1MoV,the multilayer welding temperature distribution regularity is got.And through the finite element analysis of key problems,judgment and testing to draw the following experiment results：The results showed that the closer the points from the welding,heating and cooling faster; preheating temperature increase.heating rate and high temperature residence time changed little,but the peak temperature, and the phase transition temperature change over a long residence time; weld line energy increases,t8/5 longer,t8/5 is too long,to promote grain growth,so toughness is decreased,t8/5 is too short and easy to produce hardened tissue,so the welding heat input should be strictly controlled.