摘要
试验研究了单辊轻压下量(0~14 mm)和压下位置(1#~7#辊)对高碳钢GCr15240 mm×240 mm铸坯低倍组织和屮心碳偏析的影响。结果表明:从1#拉矫辊开始压下,总压下量12 mm,低倍合格比例上升28.6%,碳偏析(0.92~1.08)合格比例上升14.3%;从1#拉矫辊开始压下,总压下量14 mm,中心疏松≤0.5级缩孔比例达到100%,碳偏析(0.92~1.08)合格率达到72.7%。综合分析得出,GCr15钢240 mm×240 mm铸坯在拉速0.75 m/min,轻压下总压下量14 mm铸坯中心碳偏析和低倍组织最佳。
The effect of light pressure(0-14 mm)and pressure position(1#-7#)on 240 mm×240 mm billet macrostructure and core carbon segregation of the GCr15 high carbon steel was studied.The results show that from the start of 1#pull straightening roll with 12 mm total pressure,a 28.6%is increased in the low-magnification ratio;carbon segregation(0.92-1.08)qualified rate is increased by 14.3 per cent.Press down from the 1#pull roller with 14 mm total pressure,center loose≤0.5 grade shrinkage ratio is up to 100%.Carbon segregation(0.92-1.08)qualified rate is reached 72.7%.From a comprehensive analysis,GCr15 Steel 240 mm×240 mm billet at drawing speed 0.75,the carbon segregation and macrostructure in the center of the billet are the best with the total amount of 14 mm under light pressure.
作者
姚亮
晁霞
高云飞
刘燕霞
张志旺
YAO Liang;CHAO Xia;GAO Yunfei;LIU Yanxia;ZHANG Zhiwang(Jiyuan Iron and Steel Company,Jiyuan 454650,China;Department of Material Engineering,Hebei Vocational and Technical College,Shijiazhuang 050091,China)
出处
《山东冶金》
CAS
2021年第2期41-42,共2页
Shandong Metallurgy
基金
河北省高校教育厅资助科研项目(ZD2019043)和重点项目(ZD2018033)。
关键词
GCR15钢
压下量
压下位置
低倍
中心碳偏析
GCr15 Steel
pressing quantity
pressing position
low power
central carbon segregation
