轻压下对GCr15钢铸坯内部质量影响试验研究  

Experimental Study on the Influence of Light Pressure on the Internal Quality of GCr15 Steel Billet

作　　者：姚亮 晁霞[1] 高云飞[2] 刘燕霞[2] 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)

机构地区：[1]济源钢铁公司,河南济源454650 [2]河北工业职业技术学院材料工程系,河北石家庄050091

出　　处：《山东冶金》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)。

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.

关 键 词：GCR15钢 压下量 压下位置 低倍 中心碳偏析 

分 类 号：TF777[冶金工程—钢铁冶金]