摘要
纯铁类线材在拉拔过程中出现凹坑和麻点缺陷的根本原因是其表面存在局部粗晶,为探索局部粗晶产生的根本原因,利用电阻恒温加热炉模拟不同加热温度(900~1 200℃)和加热时间(60~360 min)条件下,纯铁类CH1T钢晶粒的演变规律,获得晶粒异常长大的临界条件并加以控制。实验结果表明:当加热温度低于1 200℃时,CH1T钢的晶粒度随加热温度提高和加热时间的延长会经历快速下降、平稳、再下降3个阶段。当加热温度为1 200℃、延长加热时间至360 min时,由于二次再结晶作用会出现局部晶粒细化现象。
The fundamental reason for the occurrence of pits and pitting defects in pure iron wire during the drawing process is the presence of local coarse grains on its surface.To explore the root cause of local coarse grain formation,a resistance constant temperature heating furnace was used to simulate the evolution of pure iron CH1T steel grains under different heating temperatures(900-1200℃)and heating times(60-360 min),and the critical conditions for abnormal grain growth were obtained and controlled.The experimental results show that when the heating temperature is below 1200℃,the grain size of pure iron CH1T steel will undergo three stages of rapid decrease,steady decrease,and further decrease with the increase of heating temperature and heating time.When the heating temperature is 1200℃and the heating time is extended to 360 minutes,local grain refinement will occur due to secondary recrystallization.
作者
张旭
巩延杰
薛正国
崔彦文
王丽虎
ZHANG Xu;GONG Yanjie;XUE Zhengguo;CUI Yanwen;WANG Lihu(Wire Rod Factory of Xingtai Iron and Steel Co.,Ltd.,Xingtai 054027,China)
出处
《轧钢》
北大核心
2024年第6期127-130,135,共5页
Steel Rolling
关键词
纯铁类CH1T钢
加热温度
加热时间
局部粗晶
pure iron CH1T steel
heating temperature
heating time
local coarse grain
