金属热处理 ›› 2021, Vol. 46 ›› Issue (11): 131-136.DOI: 10.13251/j.issn.0254-6051.2021.11.020

• 工艺研究 • 上一篇    下一篇

工艺参数对WC颗粒增强表层复合材料与钢基界面组织的影响

张展展1, 宁家庆1, 左玲立2, 廖海洋1   

  1. 1.湖南工业大学 机械工程学院, 湖南 株洲 412007;
    2.中国机械科学研究总院集团有限公司 北京机科国创轻量化科学研究院有限公司, 北京 100083
  • 收稿日期:2021-08-21 出版日期:2021-11-25 发布日期:2021-12-08
  • 通讯作者: 廖海洋,讲师,博士,E-mail:haiyangliao1990@163.com
  • 作者简介:张展展(1986—),女,讲师,博士,主要研究方向为模具材料和复合材料组织与性能,E-mail:zhangzhanzhan0510@163.com
  • 基金资助:
    湖南省教育厅科学研究项目(18C0485);湖南省自然科学基金(2019JJ50116)

Effect of process parameters on interfacial microstructure of WC particle reinforced surface composite and steel substrate

Zhang Zhanzhan1, Ning Jiaqing1, Zuo Lingli2, Liao Haiyang1   

  1. 1. School of Mechanical Engineering, Hunan University of Technology, Zhuzhou Hunan 412007, China;
    2. Beijing National Innovation Institute of Lightweight Ltd., China Academy of Machinery Science and Technology Group Co., Ltd., Beijing 100083, China
  • Received:2021-08-21 Online:2021-11-25 Published:2021-12-08

摘要: 以45钢为基材,通过放电等离子烧结和铸造工艺成功制备了WC颗粒增强表层复合材料,研究不同浇铸工艺参数对表层WC/Fe复合材料与基材之间的界面结合及微观组织的影响。结果表明:随着浇铸量的增加,锭模的数值模拟温度可达1493 ℃,高温停留时间约734 s,为实现钢液与WC/Fe复合材料冶金结合提供有利条件,但是过高的浇铸量使WC/Fe复合材料的组织发生明显的变化,几乎观察不到WC增强相,组织出现大量鱼骨状碳化物Fe3W3C。当浇铸量控制在锭模体积的2/5时,可得到良好的WC/Fe复合材料与基材的宏观界面,界面反应产物Fe3W3C增加,但是增强颗粒仍保留了浇铸前的原始形貌。

关键词: WC/Fe表层复合材料, 45钢, 界面组织, 铸造, 数值模拟

Abstract: WC particle reinforced surface composite was prepared on 45 steel as substrate material by spark plasma sintering and then casting process. The effects of various casting process parameters on the interface bonding and microstructure between the WC/Fe composite and the steel substrate were studied. The results show that when the casting amount increases, the numerical simulation ingot mold temperature may reach 1493 ℃, and the high temperature residence duration is about 734 s, providing favorable conditions for realizing the metallurgical bonding of molten steel and WC/Fe composite material. However, due to the large casting quantity, the microstructure of the WC/Fe composite material changes noticeably, and the WC strengthened phase is hardly observed, while a lot of fishbone carbide Fe3W3C appears in the microstructure. When the casting quantity is set to 2/5 of the mold volume, a good macroscopic interface between the WC/Fe composite and the steel substrate is formed, and the interface reaction product Fe3W3C increases, but the original morphology of the reinforced particles is still preserved.

Key words: WC/Fe surface composite, 45 steel, interfacial microstructure, casting, numerical simulation

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