摘要
利用MSC.Marc软件,对直径ф160mm GCr15轴承钢喷水冷却过程的温度场进行模拟分析。利用编写的ufilm和flux子程序,将相变潜热以内热源的方式添加到温度场。通过分析棒材在不同相变潜热取值下沿径向的温度变化情况,理论探讨了相变潜热对控冷工艺的影响。结果表明:相变潜热显著减缓了棒材的冷却速度,且越接近棒材芯部相变潜热引起的温升越大。考虑相变潜热时,原来的控冷方案不满足工艺要求。因此,在模拟研究控冷时,就本文理论探讨的GCr15轴承钢棒材的控冷工艺来看,相变潜热不应忽略。
The temperature field of GCr15 bearing steel with diameter Ф160 mm in water cooling process was simulated by software MS（2. Marc. The latent heat of phase transition was added to the temperature field in the form of inner heat source by using its subprogram ＇ ufilm＇and ＇ flux~. By analyzing the temperature variation of the bar along radial direction under different phase transition enthalpy, the influence of phase transition latent heat during the controlled cooling process was theoretically discussed. The results show that when considering the latent heat, the cooling rate of the bar slows down. As it gets close to the core of the bar, the temperature rises larger. When considering the phase change, the origi- nal control scheme does not meet the technological requirements. Therefore, while using numerical simulation to study controlled cooling process, in terms of the discussion about controlled cooling technological requirements of GCr15 bearing steel bar, the phase transition latent heat shouldn＇t be ignored.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2017年第9期768-772,共5页
Journal of Iron and Steel Research
关键词
GCR15
温度场
数值模拟
相变潜热
控冷工艺
GCr15
temperature field
numerical simulation
phase transition latent heat
controlled cooling technology
作者简介
张少军（1957-），男，大学本科，教授；E-mail：sjzhang@me．ustb．edu．cn；
