元亚莎,王文焱,元莎,李峻岭,谢敬佩

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 3:昆明理工大学材料科学与工程学院
• 4:中信重工机械有限公司

摘要(Abstract)：

运用扫描电子显微镜和洛氏硬度计研究了Cr5支承辊用钢不同热处理状态下的显微组织和洛氏硬度。结果表明,调质处理后Cr5钢组织得到明显改善(回火索氏体),细小弥散分布的碳化物取代尺寸较大不规则的碳化物;淬火后试样组织为马氏体,碳化物几乎全部溶入基体,硬度随淬火温度提高而增加(由51.6 HRC增加到58.1 HRC);回火后,Cr5钢中有细小碳化物析出,且弥散分布,淬火温度较高(1050℃、1025℃)时,组织依然保留马氏体结构(回火马氏体),温度较低(1000℃)时,组织为回火索氏体,其硬度与回火前变化趋势相同(由51.4 HRC增加到54.4 HRC)。在所选定的淬火温度下,随着淬火温度的升高,硬度值增大,磨损量减小,磨损严重程度降低,耐磨性较好。

关键词(KeyWords)： Cr5支承辊用钢;调质处理;差温热处理;显微组织;硬度;摩擦磨损

Abstract:

Keywords:

基金项目(Foundation): 大型铸锻件生产共性技术研究(602009102013-1);; 洛阳市科技支撑计划(1301057A)

作者(Author): 元亚莎,王文焱,元莎,李峻岭,谢敬佩

DOI: 10.13289/j.issn.1009-6264.2015.07.012

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