表面钨合金化对高铬铸铁组织和硬度的影响

材料导报

2019, Vol. 33

Issue (z1): 362-365

金属与金属基复合材料

表面钨合金化对高铬铸铁组织和硬度的影响

张哲轩, 周再峰, 山泉, 李祖来, 蒋业华, 张飞

昆明理工大学材料科学与工程学院,昆明 650093

Effect of Surface Tungsten Alloying on Microstructure and Hardness of High Chromium Cast Iron

ZHANG Zhexuan, ZHOU Zaifeng, SHAN Quan, LI Zulai, JIANG Yehua, ZHANG Fei

School of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093

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摘要采用真空消失模铸造工艺(V-EPC)制备了高铬铸铁表面钨合金化材料,研究了表面钨合金化对高铬铸铁基体材料组织和硬度的影响。实验结果表明,基体区域的洛氏硬度约为35～40HRC,而表面合金化区域的洛氏硬度达到55～60HRC。其原因在于通过表面钨合金化可以形成硬脆相Fe₃W₃C,对提高基体材料的硬度有显著作用。同时,表面合金化区域内硬度较高的硬脆相Fe₃W₃C与硬度较低的物相Fe-Cr-C相互夹杂,Fe-Cr-C能够有效吸收载荷,防止Fe₃W₃C发生断裂,有利于提高材料的整体性能。

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关键词: 真空消失模铸造高铬铸铁表面钨合金化

Abstract: Surface tungsten alloying high chromium cast iron material was fabricated by vacuum expendable pattern casting (V-EPC) technology, the effect of surface tungsten alloying on microstructure and hardness of high chromium cast iron matrix material was investigated. The results show that the Rockwell hardness of matrix zone was about 35—40HRC, but the surface alloying zone reached about 55—60HRC. The brittle phase Fe₃W₃C had significant effect on increasing the hardness of matrix material. Meanwhile, the high-hardness phase Fe₃W₃C was mixed with the low-hardness phase Fe-Cr-C into surface alloying zone, the Fe-Cr-C effectively absorbed load and prevented Fe₃W₃C from breaking, which had a beneficial effect on improving the overall performance of material.

Key words: vacuum expendable pattern casting (V-EPC) high chromium cast iron surface tungsten alloying

出版日期: 2019-05-25 发布日期: 2019-07-05

ZTFLH:

TG156

基金资助: 国家自然科学基金项目(51871116;51561018;51501079)

作者简介: 张哲轩,2016年7月毕业于合肥工业大学,获得工学学士学位。现为昆明理工大学材料科学与工程学院硕士研究生,在山泉副教授的指导下进行研究。目前主要研究领域为金属基复合材料。山泉,昆明理工大学材料科学与工程学院副教授、硕士研究生导师。2008年7月本科毕业于昆明理工大学机电工程学院,2013年12月在昆明理工大学材料科学与工程学院材料加工工程专业取得博士学位。主要从事有金属材料和金属基复合材料的研究工作。近年来,在相关领域发表SCI/EI论文10余篇,包括Journal of Materials Science & Technology、Journal of Alloys and Compounds、Journal of Rare Earths等。quanshan.ms@gmail.com

引用本文:

张哲轩, 周再峰, 山泉, 李祖来, 蒋业华, 张飞. 表面钨合金化对高铬铸铁组织和硬度的影响[J]. 材料导报, 2019, 33(z1): 362-365.
ZHANG Zhexuan, ZHOU Zaifeng, SHAN Quan, LI Zulai, JIANG Yehua, ZHANG Fei. Effect of Surface Tungsten Alloying on Microstructure and Hardness of High Chromium Cast Iron. Materials Reports, 2019, 33(z1): 362-365.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/Iz1/362

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