王汝杰,彭世广,宋仁伯,王威,谭志东,苏耀明,孙伟锐

• 1:鞍钢集团矿业公司设备检修协力中心
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

以自主设计的稀土改性Si-Mn-B系贝氏体-马氏体复相耐磨钢为研究对象,利用正交试验研究了不同淬火温度、淬火保温时间、回火温度、回火时间对材料强度、冲击功的影响,以确定最佳热处理工艺,并利用XRD、OM、SEM、TEM方法对其最佳热处理工艺组织进行分析。结果表明:淬火温度对抗拉强度影响最大,回火温度对屈服强度的影响最大,淬火保温时间对冲击功的影响最大。最优热处理方案为:900℃×1.5 h油淬+300℃×3 h回火处理。按此方案热处理后有较好的强韧配合:抗拉强度为1903 MPa,屈服强度为1591 MPa,洛氏硬度为51.4 HRC,无缺口冲击功为267 J。采用彩色金相-化学腐蚀法,组织为下贝氏体(49.6%)、板条马氏体(43.9%)和少量残留奥氏体(6.5%)。

关键词(KeyWords)： 稀土改性;耐磨钢;热处理工艺

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王汝杰,彭世广,宋仁伯,王威,谭志东,苏耀明,孙伟锐

DOI: 10.13289/j.issn.1009-6264.2016.08.022

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