赵阳悦,熊伟,高俊峰,白云飞,侯渊,高占勇

• 1:内蒙古科技大学材料科学与工程学院
• 2:内蒙古自治区新金属材料重点实验室
• 3:陆军装备部驻包头地区某单位
• 4:内蒙古第一机械集团有限公司

摘要(Abstract)：

对30Si2MnCrMo贝氏体高强钢进行了220～320℃等温处理，分析了贝氏体/马氏体(B/M)体积比与M/A岛核壳协同结构对其力学性能的调控机制。采用膨胀法-纳米压痕联合相区测定方法，定量地表征了30Si2MnCrMo钢中B/M的比例及对其性能的贡献。结果表明：随着等温温度的升高，30Si2MnCrMo钢中的贝氏体含量逐渐增加，马氏体和残留奥氏体含量逐渐降低，硬度和贝氏体板条尺寸先增加后减少，冲击吸收能量逐渐增加；当等温温度为260℃,30Si2MnCrMo钢达到了最佳的强韧性匹配，其B/M比接近1∶1(贝氏体含量为50.3%,马氏体含量为46.6%),贝氏体板条细化至134 nm,硬度达到峰值45.3 HRC,M/A岛包壳结构(其中马氏体核心的纳米硬度为7.04 GPa)与大角度晶界的协同作用显著提高了30Si2MnCrMo钢的韧性，冲击吸收能量提升至77 J。

关键词(KeyWords)： 30Si2MnCrMo贝氏体高强钢;低温贝氏体转变;B/M体积比;M/A岛;板条尺寸;力学性能

Abstract:

Keywords:

基金项目(Foundation): 中央引导地方科技发展资金项目(2024ZY0071);; 鄂尔多斯市重点研发计划(YF20232333)

作者(Author): 赵阳悦,熊伟,高俊峰,白云飞,侯渊,高占勇

DOI: 10.13289/j.issn.1009-6264.2025-0115

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