蒲以松,王宝奇,宋孟超,张连贵

• 1:河北工业大学材料科学与工程学院

摘要(Abstract)：

针对直径在120 mm以上的大直径磨球,设计一种高碳低合金锻造磨球用钢,并对该钢所制磨球进行淬火试验以研究其淬透性。通过热膨胀仪测得该钢的临界点温度(Ac1),采用洛氏硬度计测量磨球的硬度并使用光学显微镜观察磨球心部区域的显微组织。结果表明:末端淬火得到的实验结果与Grossmann方法计算所得淬透性结果相吻合;其中,870℃淬火后的磨球具有良好的淬透性,从表面到心部的硬度分布均匀,最大体积硬度可达61.7 HRC;该磨球组织主要由细小的混合马氏体组成,平均晶粒尺寸为15μm,晶粒度级别为8.4级,满足大直径锻造磨球的使用性能要求。

关键词(KeyWords)： 锻造钢磨球;淬透性;硬度;末端淬火试验;理想临界直径

Abstract:

Keywords:

基金项目(Foundation): 邯郸市2016年科技计划产学研科技合作专项项目(1615104027)

作者(Author): 蒲以松,王宝奇,宋孟超,张连贵

DOI: 10.13289/j.issn.1009-6264.2018-0106

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