含Cr量对等离子堆焊Fe-Cr-Ti-C合金组织与性能的影响

doi:10.3969/j.issn.2095-2198.2023.05.010

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为获得高硬度的铁基堆焊合金，设计开发了多种不同Cr质量分数的Fe-Cr-Ti-C合金粉末，采用等离子堆焊技术在碳钢基体上制备相应堆焊层.通过X射线衍射仪、扫描电子显微镜和显微硬度计对不同Cr质量分数Fe-Cr-Ti-C合金的显微组织、物相组成和显微硬度进行分析.结果表明：Fe-Cr-Ti-C合金堆焊层组织由奥氏体(γ)、马氏体（M)、M₇C₃和TiC组成，堆焊层中随着Cr质量分数的提高，马氏体基体组织数量先增大后减小，M₇C₃数量逐渐增多，且形态由断续网状转变为初生六边形，TiC呈开花状或块状；堆焊层侧面显微硬度呈梯度分布，随着Cr质量分数的增加，堆焊层表层的硬度值不断提高，Cr质量分数为15.0%时其硬度达到最佳值，合金堆焊层顶端显微硬度平均值最高，达到HV₀_.₂1 186.

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关键词: 显微硬度')" href="#">

显微硬度 M₇C₃ Fe-Cr-Ti-C系

Abstract:

In order to obtain iron-based surfacing alloy with high hardness,various Fe-Cr-Ti-C alloy powders with different Cr content were designed and developed,and the corresponding surfacing layers were prepared on carbon steel substrate by plasma surfacing technology.The microstructure,phase composition and microhardness of Fe-Cr-Ti-C alloy with different Cr mass fraction were analyzed by X-ray diffraction,scanning electron microscope and microhardness tester.The results show that the surfacing layer of Fe-Cr-Ti-C alloy consists of austenite(γ),martensite(M),M₇C₃ and TiC.With the increase of Cr content,the number of martensite matrix structures in the surfacing layer first increases and then decreases,and the number of M₇C₃ gradually increases.The morphology changes from intermittent network to primary hexagon,and TiC is flowered or blocky.The microhardness on the side of the surfacing layer presents a gradient distribution.With the increase of Cr mass fraction,the hardness of the surfacing layer increases continuously.When the Cr mass fraction is 15.0%,it is the best value,and the average microhardness on the top of the alloy surfacing layer is the highest,reaching HV₀_.₂1 186.

Key words: microhardness')" href="#">

microhardness M₇C₃ Fe-Cr-Ti-C alloy system

出版日期: 2023-10-27 发布日期: 2024-06-06 整期出版日期: 2023-10-27

ZTFLH:

TH117.3

基金资助:

国家自然基金项目(51901141)；辽宁省教育厅青年项目（LQ2017014）

通讯作者: 宗琳

作者简介: 杨洋（1997—），男，四川德阳人，硕士研究生在读，主要从事材料表面强化技术的研究.

引用本文:

杨洋1, 宗琳1, 周建1, 王学昭1, 徐俊尧1, 王明2.

含Cr量对等离子堆焊Fe-Cr-Ti-C合金组织与性能的影响 [J]. 沈阳化工大学学报, 2023, 37(5): 457-456.
YANG Yang1, ZONG Lin1, ZHOU Jian1, WANG Xuezhao1, XU Junyao1, WANG Ming2.

Effect of Cr Content on Microstructure and Properties of Plasma Surfacing Fe-Cr-Ti-C Alloy . Journal of Shenyang University of Chemical Technology, 2023, 37(5): 457-456.

链接本文:

https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2023.05.010 或 https://xuebao.syuct.edu.cn/CN/Y2023/V37/I5/457

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