杨天宝,沈鹏,陈雯,任英志,黄涛,唐倩,李坤

• 1:重庆大学机械与运载工程学院
• 2:金属增材制造(3D打印)重庆市重点实验室
• 3:郑州大学机械与动力工程学院
• 4:机械传动国家重点实验室

摘要(Abstract)：

采用激光选区熔化(SLM)技术制备了均匀致密的MS1超高强马氏体模具钢，并对其进行了850℃固溶1 h+550℃时效4 h的热处理，采用扫描电镜、显微硬度仪和万能试验机等研究了打印态和热处理态试样的微观组织和力学性能。结果表明：MS1超高强马氏体模具钢SLM打印态的组织主要由板条状马氏体和奥氏体组成，组织均匀细小，但存在少量微小气孔；热处理后，MS1超高强马氏体模具钢的组织为细小的全马氏体板条，微小气孔缺陷消失；与打印态试样相比，热处理态试样的强度显著增加，塑性有所降低，屈服强度提升超过1倍，抗拉强度超过2 GPa,提升70%以上，硬度提升82%以上，伸长率由10.7%降至5.6%。

关键词(KeyWords)： 激光选区熔化;MS1超高强马氏体模具钢;热处理;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(51975073);; 中央高校基本科研业务费(2021CDJQY-024)

作者(Author): 杨天宝,沈鹏,陈雯,任英志,黄涛,唐倩,李坤

DOI: 10.13289/j.issn.1009-6264.2021-0640

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