程振飞,贺俊光,庞庆海,陈学文,殷立涛,徐栋栋

• 1:河南科技大学材料科学与工程学院
• 2:洛阳中重铸锻有限责任公司

摘要(Abstract)：

通过Formastor-F II热膨胀相变仪对HG80钢在连续冷却过程中的热膨胀曲线进行测定，结合微观组织和维氏硬度绘制其连续冷却转变曲线(CCT曲线),分析不同冷却速度对其组织转变的影响。结果表明：在连续冷却过程中，HG80钢发生了奥氏体向铁素体、珠光体、贝氏体和马氏体的相变；当冷却速度小于0.1℃/s时，HG80钢的组织为铁素体和珠光体，此时显微硬度较低，为214 HV2;当冷却速度为0.3～0.5℃/s时，组织为铁素体、珠光体和贝氏体，显微硬度增加到240 HV2;当冷却速度升高到3℃/s时，组织为铁素体和贝氏体，显微硬度为299 HV2;当冷却速度为5～20℃/s时，组织为贝氏体和马氏体，显微硬度快速增加；当冷却速度大于20℃/s时，只发生马氏体转变，显微硬度达到最高，为571 HV2。

关键词(KeyWords)： HG80钢;连续冷却;CCT曲线;微观组织;维氏硬度

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2020YFB2008400);; 河南省重大科技专项(221100230200)

作者(Author): 程振飞,贺俊光,庞庆海,陈学文,殷立涛,徐栋栋

DOI: 10.13289/j.issn.1009-6264.2023-0518

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