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异型坯连铸二冷工艺优化研究孙维1,汪开忠1,文光华2,徐海伦3,汤寅波1,唐萍1(1.安徽省马鞍山市马鞍山钢铁股份有限公司技术中心2.重庆大学 材料科学与工程学院, 重庆 4000443.重庆大学 材料科学与工程学院,重庆 400044)摘 要:基于二冷区传热的基本原理和异型坯凝固传热特点,建立了异型坯凝固传热模型;通过现场测试铸坯表面温度和坯壳厚度对数学模型进行修正,得到了异型坯连铸过程中表面温度随时间变化的规律;同时,对原有二冷制度进行了评估,提出了合理的二冷改进措施.通过二冷工艺的优化,提高了二次冷却的均......
Cavitation-erosion mechanism of laser cladded SiC particle reinforced metal matrix composite ZHANG Chun-hua(张春华)1, 2, 3, ZHANG Song(张 松)1, YANG Hong-gang(杨洪刚)1, ZHU Sheng-long(朱圣龙)2, MAN Hau... of process parameters investigated, the parameters were optimized to produce the SiCp reinforced metal matrix composites(MMC) modified layer on AA6061 alloy surface. After being treated, the modified layer......
J. Cent. South Univ. (2012) 19: 1353-1358 DOI: 10.1007/s11771-012-1149-4 Liquid film falling behaviour on horizontal circular cylinder CHUNG Han-shik1, K. Wusiman2, KIM Seong-soo2, B. Nasan2, H. Afrianto2, Hafizur Rehman2, CHOI Du-youl3, JEONG Hyo-min1 1. Department of Energy and Mechanical Engineering, The Institute of Marine Industry, GyeongSang National University, TongYoung, GyeongNam 650-160......
J. Cent. South Univ. (2019) 26: 813-823 DOI: https://doi.org/10.1007/s11771-019-4051-5 Adsorption properties of a novel 3D graphene/MgO composite for heavy metal ions ZHOU Ying(周颖)1, LIANG Chun-yan... to characterize the prepared 3D graphene/MgO composite. The adsorption performance of some metal ions on 3D graphene/MgO was investigated. The results showed that the adsorption capacity was greater than 3D......
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; Dynamic optimization of cutoff grade in underground metal mining GU Xiao-wei(顾晓薇), WANG Qing(王青... the overall economic gain from a metal mine operation, selection of cutoff grades must consider two important aspects: the time value of money and the spatial variation of the grade distribution......
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减少连铸异型坯表面纵裂纹的工艺研究吴坚1,许健1,杨应东1(1.安徽省马鞍山市马钢股份有限公司第三钢轧总厂)摘 要:马钢连铸异型坯存在表面纵裂纹,是造成轧后废品的主要原因.对连铸坯表面温度测量,对结晶器传热进行热模拟分析.结果表明,连铸坯表面温度差异很大,由于异型坯形状的特殊性,结晶器传热存在严重的不均匀性,而热应力导致纵裂纹.为了抑制表面总裂纹,必须改善结晶器传热,改进保护渣性能,稳定浇注条件.关键词:异型坯; 表面纵裂纹; 传热......
THE ADAPTIVE FINITE ELEMENT REMESHING IN LARGE DEFORMATION OF METAL FORMING X.X.Guo1,J.S.Liu2 (1.Advanced Manufacturing Technology and Engineering Department, Shenzhen Polytechnic, Shenzhen... it is verified that the remeshing algorithm developed here exhibits good performance and has high accuracy. Key words:adaptive remeshing; quadrilateral elements; metal forming; [全文内容正在添加中] ......