含铝高硼高速钢显微组织的电镜表征

doi:10.13251/j.issn.0254-6051.2022.07.031

金属热处理 ›› 2022, Vol. 47 ›› Issue (7): 177-182.DOI: 10.13251/j.issn.0254-6051.2022.07.031

含铝高硼高速钢显微组织的电镜表征

董彦超¹, 马铁军¹, 金头男¹, 袁乃博², 金头男¹

1.北京工业大学材料科学与工程学院, 北京 100124;
2.邢台德龙机械轧辊有限公司, 河北邢台 054009

收稿日期:2021-12-28 修回日期:2022-04-21 出版日期:2022-07-25 发布日期:2022-08-12
通讯作者: 金头男,教授,E-mail: tnjinkim@ bjut.edu.cn
作者简介:董彦超(1995—),男,硕士研究生,主要研究方向为金属材料的微观组织,E-mail: 118813119384@163.com。
基金资助:
河北省重大科技成果转化专项(21281003Z)

Electron microscopy characterization for microstructure of Al-bearing high-boron high-speed steel

Dong Yanchao¹, Ma Tiejun¹, Fu Hanguang¹, Jin Tounan¹, Yuan Naibo², Jin Tounan¹

1. School of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China;
2. Xingtai Delong Machinery Roll Co., Ltd., Xingtai Hebei 054009, China

Received:2021-12-28 Revised:2022-04-21 Online:2022-07-25 Published:2022-08-12

摘要/Abstract

摘要： 采用扫描电镜(SEM)、X射线衍射(XRD)、能谱(EDS)、背散射电子衍射(EBSD)以及透射电镜(TEM)对含铝高硼高速钢热处理前后的组织及硼碳化物类型进行分析。结果表明,铸态含铝高硼高速钢组织为铁素体和网状硼碳化物,硼碳化物类型为Fe₂B型(富Cr),FeMo₂B₂型(富Mo)和Fe₃C(Cr-Mo)型;热处理后基体组织为马氏体,网状硼碳化合物破碎并球化。硼碳化物为Fe₂B型(富Cr),(Fe, Cr)₂₃C₆型(Cr-Mo)和FeMo₂B₂型(富Mo)。热处理后网状硼碳化物断裂是由于Fe₃C型(Cr-Mo)硼碳化物分解为(Fe, Cr)₂₃C₆型(Cr-Mo)和FeMo₂B₂型(富Mo)硼碳化物。TEM分析所得硼碳化物的晶体结构与EBSD鉴定得出的结论一致。

关键词: 高硼高速钢, 热处理, 显微组织, 电镜, 硼碳化物

Abstract: Microstructure and boron carbide type of Al-bearing high-boron high-speed steel (BHSS) were analyzed by a combination of several microscopy characterization techniques including scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM). The results show that the microstructure of as-cast Al-bearing high-boron high-speed steel is ferrite and network boron carbide, and the type of boron carbide includes Fe₂B (Cr-rich), FeMo₂B₂ (Mo-rich) and Fe₃C (Cr-Mo). After heat treatment, the matrix microstructure is martensite, and the network boron carbide is broken and spheroidized, and the type of boron carbide includes Fe₂B (Cr-rich), (Fe, Cr)₂₃C₆ (Cr-Mo), and FeMo₂B₂ (Mo-rich). The rupture of network boron carbide after heat treatment is due to the decomposition of Fe₃C (Cr-Mo) into (Fe, Cr)₂₃C₆ (Cr-Mo) and FeMo₂B₂(Mo-rich). The crystal structure of boron carbide obtained by TEM analysis is consistent with the conclusion of EBSD.

Key words: high-boron high-speed steel, heat treatment, microstructure, electron microscopy, boron carbide

中图分类号:

TG142.1

董彦超, 马铁军, 金头男, 袁乃博, 金头男. 含铝高硼高速钢显微组织的电镜表征[J]. 金属热处理, 2022, 47(7): 177-182.

Dong Yanchao, Ma Tiejun, Fu Hanguang, Jin Tounan, Yuan Naibo, Jin Tounan. Electron microscopy characterization for microstructure of Al-bearing high-boron high-speed steel[J]. Heat Treatment of Metals, 2022, 47(7): 177-182.

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含铝高硼高速钢显微组织的电镜表征

Electron microscopy characterization for microstructure of Al-bearing high-boron high-speed steel

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