王彭涛,徐德超,张博明,赵海峰,韩赟

• 1:首钢集团有限公司技术研究院

摘要(Abstract)：

采用光学显微镜(OM)、电子背散射衍射(EBSD)技术和透射电镜(TEM)等分析了1800 MPa热冲压钢经不同工艺奥氏体化后的显微组织、脱碳层及析出物形貌，利用力学实验机和弯曲夹具研究了奥氏体化工艺对其弯曲性能的影响。结果表明：在较低的奥氏体化温度加热淬火后实验钢基体存在非马氏体组织；随着奥氏体化温度的升高实验钢的最大弯曲力先升高后下降，而弯曲角度呈现下降趋势；延长加热保温时间会使得实验钢的表面脱碳层逐渐加深，弯曲角度升高，最大弯曲力下降。热冲压淬火后实验钢仍然存在一定程度的各向异性，但随着加热温度的升高，横纵向性能差异逐渐减小。采用870℃加热5 min后热冲压，实验钢可以获得抗拉强度和弯曲角度分别达到1883 MPa和54.5°的综合性能。

关键词(KeyWords)： 热冲压;马氏体;拉伸性能;弯曲角度;脱碳层

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王彭涛,徐德超,张博明,赵海峰,韩赟

DOI: 10.13289/j.issn.1009-6264.2022-0519

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