摘要
通过显微组织观察实验,对细晶高强IF钢在不同加热温度和保温时间下奥氏体晶粒长大规律进行研究。结果表明:随加热温度升高、保温时间延长,奥氏体晶粒尺寸逐渐增大。由实验结果可知细晶高强IF钢的晶粒粗化温度为1050℃,晶粒粗化时间为40 min。为保证微合金元素充分固溶,同时获得细小的奥氏体晶粒,生产中将加热温度控制在1050~1100℃、保温时间控制在30 min^40 min。通过对实验数据进行非线性回归建立了细晶高强IF钢奥氏体晶粒长大规律的数学模型,模型的计算结果与实验结果基本吻合。
Austenite grain growth behavior of fine-grain and high-strength IF steel at different heating temperature and holding time were investigated by microstructure observation experiments. The results show that with the heating temperature rising and holding time increasing, the austenite grain sizes grow up gradually. It is found that the grain coarsening temperature of fine-grain and high-strength IF steel is 1050 ℃ and the grain coarsening time is 40 min. In the production we should control the heating temperature at 1050 ℃-1100 ℃ and the holding time in 30 min-40 min, in order to guarantee the microalloyed elements solid solution fully and at the same time achieve fine austenite grain size. The austenite grain growth behavior model of fine-grain and high-strength IF steel is established on the basis of non-linear regression of experimental data. The model calculated values are basically consistent with the experimental results.
出处
《热加工工艺》
CSCD
北大核心
2015年第4期56-60,共5页
Hot Working Technology
基金
辽宁省教育厅基金(L2010086)
关键词
细晶高强IF钢
加热温度
保温时间
奥氏体
晶粒长大模型
fine-grain and high-strength IF steel
heating temperature
holding time
austenite
grain growth model
