赵迪,马宁,张柯柯,肖笑,尹丹青

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

以铁基合金粉(G302)和石墨粉(C)为原料,利用氩弧熔覆技术在Q235钢表面原位合成了碳化铬增强铁基复合涂层并对涂层的组织和性能进行了表征。结果表明:涂层和基体结合良好,冶金反应比较充分;当粉末配比为G302∶C=50∶3时,涂层主要由(Cr,Fe)_7C_3、(Cr,Fe,Ni)相组成;随着石墨粉比例的增加,碳化物含量增加,当粉末配比为G302∶C=50∶4和G302∶C=50∶5时,涂层中出现了(Cr,Fe)_(23)C_6相,当G302∶C=50∶5时,初生碳化物呈现U型和刀状形态。涂层中碳化物增强相从底部到顶部不断增多,呈现梯度分布的特征。试样显微硬度从母材到涂层表面呈现梯度增长,粉末配比为G302∶C=50∶5时,涂层显微硬度可达950 HV0.1。

关键词(KeyWords)： 氩弧熔覆;原位合成;碳化铬;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1604132);; 河南省科技攻关计划项目(172102210259)

作者(Author): 赵迪,马宁,张柯柯,肖笑,尹丹青

DOI: 10.13289/j.issn.1009-6264.2017-0198

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