孙晓文,林诗慧,王天生

• 1:燕山大学亚稳材料制备技术与科学国家重点实验室
• 2:燕山大学国家冷轧板带装备及工艺工程技术研究中心

摘要(Abstract)：

高碳高硅钢经300和340℃等温淬火后获得了纳米贝氏体组织,采用扫描电镜、透射电镜、显微硬度仪和拉伸及冲击试验等研究了其经200～600℃回火处理后的显微组织和力学性能。结果表明,在相同回火条件下,与340℃等温淬火试样相比,300℃等温淬火试样的强度、硬度和冲击韧性较高,塑性较低。纳米贝氏体组织在300℃以下具有良好的回火稳定性,450℃回火时薄膜状残留奥氏体开始分解,贝氏体铁素体板条开始合并粗化。低于450℃回火,试验钢的抗拉强度和屈服强度略有增高,伸长率和硬度变化不大。500℃回火,强度开始明显降低,塑性和冲击韧性最低,硬度升到最高而出现二次硬化。300℃回火后试验钢的冲击韧性最高,两种等温淬火试样均在300℃回火时得到最佳的综合力学性能。

关键词(KeyWords)： 高碳高硅钢;等温淬火;纳米贝氏体;回火;组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51471147)

作者(Author): 孙晓文,林诗慧,王天生

DOI: 10.13289/j.issn.1009-6264.2021-0001

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