张光倩,谢康笛,郭慧琦,周海冲,孙明月,郝露菡

• 1:燕山大学国家冷轧板带装备及工艺工程技术研究中心
• 2:中国科学院金属研究所沈阳材料科学国家研究中心

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、电子背散射衍射(EBSD)和X射线衍射(XRD)等研究了不同温度奥氏体化对M54二次硬化钢微观组织及力学性能的影响。结果表明：当奥氏体化温度较低时，试验钢有较多的未溶(Mo, W)_6C碳化物和预处理后的粗大晶粒，使其强度降低，冲击性能恶化。提高奥氏体化温度可减少未溶(Mo, W)_6C碳化物的数量，同时奥氏体再结晶使晶粒细化，试验钢的强度和冲击性能快速上升，当奥氏体化温度为1060℃时，试验钢具有优异的强韧性配合，而进一步提高奥氏体化温度到1100℃将导致晶粒迅速粗化进而降低冲击性能。利用EBSD研究了不同温度奥氏体化后试验钢的马氏体亚结构，发现马氏体板条束、板条块具有与奥氏体晶粒相似的变化规律。

关键词(KeyWords)： 二次硬化钢;微观组织;力学性能;奥氏体化温度;位错密度

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金-青年科学基金项目(E2021203197);; 创新研究群体项目(E2021203011)

作者(Author): 张光倩,谢康笛,郭慧琦,周海冲,孙明月,郝露菡

DOI: 10.13289/j.issn.1009-6264.2022-0150

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