稀土对icdp 轧辊组织及抗热疲劳性能影响的研究 - 钢铁钒钛.pdfVIP

第33卷第6期 钢摇 铁摇 钒摇 钛 Vol郾33,No郾6 2012年12月 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 IRON STEEL VANADIUM TITANIUM 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 摇 December2012 稀土对ICDP 轧辊组织及抗热疲劳性能 影响的研究 王卫国,李忠华 (江苏大学材料科学与工程学院,江苏 镇江212013) 摘摇 要:用稀土在熔炼后期对铁液进行变质处理,并通过金相、热疲劳试验来研究不同稀土含量对轧辊组织及其热 疲劳性能的影响。 试验表明,稀土含量不超过0.1%时,能有效控制轧辊基体组织中碳化物与石墨的形态、分布,进 而改善轧辊的抗热疲劳性能。 但稀土含量超过0.1%后轧辊基体组织中的碳化物形态与分布变化不大,石墨变得 粗大,引起其抗热疲劳性能恶化。 关键词:ICDP轧辊;稀土;抗热疲劳性能;变质处理 中图分类号:TG115郾5摇 摇 文献标识码:A摇 摇 文章编号:1004-7638(2012)06-0080-06 Research on Influence of Rare Earth on ICDP Roll Structure and Thermal Fatigue Resistance Wang Weiguo,Li Zhonghua (College of Materials Science and Engineering,Jiangsu University,Zhenjiang212013,Jiangsu,China) Abstract:Liquid ironwasmodifiedby addingrare earth at later stage of melting,and metallographic and thermal fatigue testswere carried out to investigate the effects of different contents of rare earth on struc鄄 tures and thermal fatigue performance of rolls. The test shows that when the content of rare earth is not more than0.1%,the morphology and distribution of carbide and graphite in the matrix structure can be effectively controlled,thereby thermal fatigue behavior of the rolls can be improved. However,when the rare earth content ismore than0.1%,there islittle change in the morphology and distribution of carbide while graphite grows larger,which leads to unfavorable thermal fatigue behavior of rolls. Key words:ICDP roll;rare earth;thermal fatigue resistance;modification treatment 量的要求越来越高,为满足市场此类需求,各大钢厂 0摇 引言 对ICDP轧辊的抗热疲劳性能及抗热冲击性能的要 摇 摇 ICDP轧辊又称为高镍铬无限冷硬离心复合轧 求越来越高,所以开发高抗热裂性的ICDP 轧辊已