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大型钢锭的加热为非线性过程,其心部温度无法直接探测,如何制定合理的大型钢锭加热工艺规范成为大型锻件锻造过程中首要解决的关键技术问题。采用Deform-3D软件对某船用螺旋桨轴锻造用钢锭锻前加热工艺规范进行了数值模拟,对加热过程中的温度场及应力场进行了分析,并对加热过程中安全性进行了评估。在此基础上,对加热工艺规范进行了优化。结果表明,提高保温温度和温度头可以在不增加工时和内应力的情况下提高钢锭加热终了时刻温度场的均匀性。
Large-scale ingot heating is a nonlinear process, the heart of the temperature can not be directly detected, how to develop a reasonable large-scale ingot heating process specifications for large forgings forging the primary solution to the key technical issues. Deform-3D software was used to simulate the heating process specification of forged steel propeller shaft of a ship, the temperature field and stress field during heating process were analyzed, and the safety during heating process was evaluated. On this basis, the heating process specifications were optimized. The results show that increasing the holding temperature and the temperature head can improve the uniformity of the temperature field at the end of ingot heating without increasing working hours and internal stress.