电加热冒口铸钢辊凝固过程数值模拟及优化  

Numerical simulation of electric heating riser steel roll during solidification and its optimization

作　　者：姬发 肖志霞 冯建航 张花蕊[2] 陈兴富 刘杰兵 JI Fa;XIAO Zhi-xia;FENG Jian-hang;ZHANG Hua-rui;CHEN Xing-fu;LIU Jie-bing(School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;Research Institute for Frontier Science,Beihang University,Beijing 100191,China;Hebei Roll Green Manufacturing Technology Innovation Center,Xingtai 054000,Hebei,China;Casting and Forging Plant,Xingtai Delong Machinery and Mill Roll Co.,Ltd.,Xingtai 054000,Hebei,China)

机构地区：[1]河北工业大学材料科学与工程学院,天津300130 [2]北京航空航天大学前沿科学技术创新研究院,北京100191 [3]河北省轧辊绿色制造技术创新中心,河北邢台054000 [4]邢台德龙机械轧辊有限公司铸造厂,河北邢台054000

出　　处：《中国冶金》2021年第3期73-81,86,共10页China Metallurgy

基　　金：天津市科学计划资助项目(18YFZCGX00220);河北省钢铁联合基金资助项目(E2019202482)。

摘　　要：为提高某铸钢轧辊的工艺出品率,节约能源消耗,本研究针对该轧辊铸造过程进行数值模拟,依据无损探伤缺陷位置确定合理的换热边界换热条件,再现了缩孔缩松的位置,并评估了冒口降低的可行性。结果表明,在冒口上表面换热系数为2.4W/(m^(2)·K)、发热效率为25%时,该铸钢辊的缺陷模拟结果与实际探伤结果最为接近。基于此,当减小冒口高度低于100mm时,铸件本体内凝固缺陷并未加重;而当冒口减少高度超过150mm时,冒口内部凝固缺陷有进入铸件本体的风险。To improve the yield of the riser of cast steel roll and save energy consumption,the casting process of a steel roll with electric heating riser was simulated,and the reasonable heat transfer boundary heat transfer conditions were determined according to the non-destructive testing.The porosity and shrinkage was predicted,and the possibility of riser reduction was evaluated.The results show that when the heat transfer coefficient at the upper surface of the riser was 2.4W/(m^(2)·K)and the efficiency of the heating transfer was 25%,the defect in the cast steel roller by prediction was closest to that by actual testing.Based on this,when the riser height was lower than 100mm,the solidification defects in the casting body were not aggravated.Whereas,as the riser reduction height exceeded 150mm,the solidification defects may form into the casting.

关 键 词：轧辊 缺陷模拟 缩松缩孔 冒口 PROCAST 

分 类 号：TG244.3[金属学及工艺—铸造] TG333.17