田磊,敖青,刘玉爱,李胜利

• 1:山东大学材料科学与工程学院
• 2:山东省大规格合金结构钢棒材工程技术中心

摘要(Abstract)：

通过控制热处理参数在G55SiMoV钢中获得了不同贝氏体含量的马氏体/贝氏体复相组织,研究了贝氏体含量对其韧性和回火脆性的影响。结果表明:随等温时间延长贝氏体含量增加,等温淬火5 min、15 min、30 min、60 min可分别获得17%、27%、29%、31%的贝氏体。当贝氏体量较多(大于27%)时,马氏体对贝氏体的应变强化效果降低,韧性提高更加显著。300℃以下回火时组织和硬度基本不变;300℃回火时存在回火脆性,该马氏体/贝氏体复合组织钢的回火脆性温度区间几乎不受贝氏体量的影响,但增加贝氏体量可以提高残留奥氏体稳定性,使韧性降幅减小。

关键词(KeyWords)： 马氏体/贝氏体复相组织;贝氏体含量;回火脆性;残留奥氏体稳定性;韧性

Abstract:

Keywords:

基金项目(Foundation): 2012年济南市高校自主创新项目(201202073)

作者(Author): 田磊,敖青,刘玉爱,李胜利

DOI: 10.13289/j.issn.1009-6264.2014.07.024

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