Improvement of wear resistance and ductility of white cast irons with hard carbides for hot rolling rolls

提高热轧辊用硬质碳化物白口铸铁的耐磨性和延展性

• 批准号: 07650836
• 负责人: IKEDA Minoru
• 金额: $ 1.22万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650836/
• 关键词: White cast Irons; Carbide; High speed Cast Irons; Hotrolls; 熱間圧延ロール; 耐摩耗材; 圧延ロール; X線回折

Multicomponet high speed cast irons has recently come to be used as work rolls for hot rolling of steels because it contains hard eutectic carbides and shows high resistance to wear. The mechanical strength and ductility are also required as roll materials. They are strongly dependent on the types, quantities and morphologies of eutectic carbides. In the present work the effects of alloying elements on the formation of eutectic carbides in white cast irons have been investigated.The cast irons with 2.0-2.5 mass%C,3-5 mass%V,2-8 mass%W,2-5 mass%Mo and 2-5 mass%W were melted using an induction furnace and cast into adiabatic molds with a riser. The solidified samples were microscopically observed and area fractions for carbides were evaluated. The chemical composition of each carbide is also analyzed by a scanning electron microscope with an energy dispersion analyzer. The regression relationships between volume fraction of carbides, Fv, and alloying elements are obtained from data. Obtained equations for MC carbide, M2C carbide and M7C3 carbide are Fv (MC)=1.20V-0.62, Fv (M2C)=0.63V+1.09Mo+0.77W-2.75 and Fv (M7C3)=3.18Cr-0.65Mo-7.04, respectively.

Multicomponet高速铸铁最近被用作工作卷，用于钢的热卷，因为它含有坚硬的共晶碳化物，并且表现出较高的耐磨性。机械强度和延展性也需要作为卷材料。它们强烈依赖于共晶碳化物的类型，数量和形态。在目前的工作中，已经研究了合金元素对白色铸铁甲壳虫形成的影响。铸铁具有2.0-2.5质量％C，3-5质量％V，2-8 Mass％W，2-5质量％W，2-5质量％MO和2-5质量％MO和2-5质量％W，使用诱导炉融化，并与Aniabicatic Molds一起使用RISRISERS。观察到固化样品，并评估碳化物的面积分数。还通过扫描电子显微镜和能量分散分析仪分析了每个碳化物的化学成分。碳化物，FV和合金元素的体积分数之间的回归关系是从数据中获得的。获得的MC碳化物，M2C碳化物和M7C3碳化物的方程为FV（MC）= 1.20V-0.62，FV（M2C）= 0.63V+1.09MO+0.77W-2.75和FV（M7C3）= 3.18CR-0.65MO-7..04。