刘杰兵,张海峰,陈兴富,高鹏冲,陈乃录,肖福仁

• 1:邢台德龙轧辊有限公司河北省轧辊绿色制造技术创新中心
• 2:燕山大学河北省金属产品工艺与性能优化实验室
• 3:上海交通大学上海市激光制造与材料改性重点实验室

摘要(Abstract)：

采用光学显微镜、扫描电镜(SEM)、X射线衍射(XRD)、热膨胀等方法等研究了添加和未添加废高铬铸铁耐磨板的两支高铬铸铁轧辊的凝固组织,以及研究了添加废高铬铸铁耐磨板对轧辊经淬火和回火热处理后的组织和硬度的影响。结果表明:添加废高铬铸铁耐磨板的轧辊的共晶M_7C_3碳化物数量高于未添加耐磨板的轧辊,且初生奥氏体中的二次碳化物形态和数量也不同。两支轧辊凝固组织的差异会影响轧辊热处理过程中组织转变及最终的组织和硬度。未添加废高铬铸铁耐磨板轧辊的淬火组织中存在两种尺寸的碳化物;而添加高铬铸铁耐磨板轧辊的淬火组织仅存在一种尺寸碳化物,且硬度略高于未添加废高铬铸铁耐磨板轧辊。在回火过程中,两支轧辊均在450℃出现二次硬化,而且随回火时间延长和回火温度的升高,淬火组织中粗大碳化物转变为细小的碳化物,两支轧辊的碳化物尺寸趋于一致。

关键词(KeyWords)： 轧辊;原料;凝固组织;热处理;硬度

Abstract:

Keywords:

基金项目(Foundation): 上海市激光制造与材料改性重点实验室开放基金(MLPM2019-2);; 河北省自然科学基金-钢铁联合基金(E2019203381)

作者(Author): 刘杰兵,张海峰,陈兴富,高鹏冲,陈乃录,肖福仁

DOI: 10.13289/j.issn.1009-6264.2019-0266

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