渗硼处理对H13钢碳化铬覆层抗铝液侵蚀性能的影响

doi:10.13251/j.issn.0254-6051.2020.10.037

金属热处理 ›› 2020, Vol. 45 ›› Issue (10): 191-193.DOI: 10.13251/j.issn.0254-6051.2020.10.037

渗硼处理对H13钢碳化铬覆层抗铝液侵蚀性能的影响

李科举, 王华君, 高野, 汪学阳, 赵小雨

武汉理工大学材料科学与工程学院, 湖北武汉 430070

收稿日期:2020-03-24 出版日期:2020-10-25 发布日期:2020-12-29
通讯作者: 王华君,副教授,博士,E-mail:wanghuajunhb@163.com
作者简介:李科举(1995—),男,硕士研究生,主要研究方向为模具材料表面改性等,E-mail:1763271593@qq.com。
基金资助:
国家自然科学基金(51475346)

Effect of boronizing on aluminum corrosion resistance of chromium carbide coating on H13 steel

Li Keju, Wang Huajun, Gao Ye, Wang Xueyang, Zhao Xiaoyu

School of Materials Science and Engineering, Wuhan University of Technology, Wuhan Hubei 430070, China

Received:2020-03-24 Online:2020-10-25 Published:2020-12-29

摘要/Abstract

摘要： 将未处理H13钢、热反应扩散(TRD)法渗铬试样及铬硼复合渗(TRD渗铬+TRD渗硼)试样浸入熔融铝液进行热浸铝试验。对渗铝试样截面进行显微观察及渗铝层定点成分分析。结果表明:相同热浸铝条件下,单一碳化铬覆层的浸铝层厚度与未处理H13钢相当,即单独渗铬并不能提升H13钢抗铝液侵蚀能力。而硼铬复合处理试样浸铝层厚度为单一碳化铬覆层的67%,渗硼处理的应用能够有效提高TRD碳化铬覆层抗铝液侵蚀能力。试样经热浸铝后渗铝层Fe-Al金属间化合物成分主要为Fe₂Al₅。

关键词: H13钢, 热反应扩散处理, 硼铬覆层, 热浸铝

Abstract: Specimens of untreated H13 steel, thermo-reactive diffusion (TRD)chromizing only and TRD (chromizing+boronizing) treating were immersed in molten aluminum to carry out hot-dipping aluminizing test.The cross section of the aluminized specimens was observed by microscope and composition of the aluminized layer was analyzedat fixed points. The results show that under the same hot-dipping aluminizing conditions, the thickness of aluminized layer of the chromium carbide coating without boronizing is equivalent to that of untreated H13 steel, showing that chromizing alone cannot improve the corrosion resistance of H13 steel to liquid aluminum. While the thickness of aluminized layer of boron-chromium composite coating specimen is only 67% of that of the chromium carbide coating without boronizing, which depicts that the application of boronizing treatment can effectively improve the aluminum corrosion resistance of the TRD chromium carbide coating. After hot-dipping aluminizing, the composition of Fe-Al intermetallic compound is mainly Fe₂Al₅.

Key words: H13 steel, thermo-reactive diffusion (TRD) treatment, boron-chromium coating, hot-dipping aluminizing

中图分类号:

TG156.8

李科举, 王华君, 高野, 汪学阳, 赵小雨. 渗硼处理对H13钢碳化铬覆层抗铝液侵蚀性能的影响[J]. 金属热处理, 2020, 45(10): 191-193.

Li Keju, Wang Huajun, Gao Ye, Wang Xueyang, Zhao Xiaoyu. Effect of boronizing on aluminum corrosion resistance of chromium carbide coating on H13 steel[J]. Heat Treatment of Metals, 2020, 45(10): 191-193.

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渗硼处理对H13钢碳化铬覆层抗铝液侵蚀性能的影响

Effect of boronizing on aluminum corrosion resistance of chromium carbide coating on H13 steel

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