摘要
WC改性钢铁材料兼具硬质相的高强度、高硬度和基体金属良好的塑性与韧性,广泛应用于机械、冶金、化工等领域。为克服传统WC改性钢铁材料应用中存在的溶解析出、成本较高等问题,本研究以钨铁、石墨、还原铁粉和中碳锰铁为原材料,采用氩弧熔覆技术在Q235钢表面原位合成WC颗粒增强铁基涂层材料,研究W含量对WC改性钢铁材料组织与性能的影响。结果表明:熔覆涂层与Q235钢界限分明,无气孔、裂纹等缺陷,冶金结合良好。在W∶C=1∶1.5(摩尔比,下同)的情况下,W含量增加促进原位合成WC颗粒,显著提高基体材料的硬度和耐磨性能。当W含量增加到50%及以上时,WC颗粒数量显著增加,均匀弥散分布于基体表面,涂层材料洛氏硬度达61 HRC及以上,相对耐磨性约为Q235钢的66倍及以上,对钢铁材料组织与性能的改善作用明显。
Using ferrotungsten,graphite,reduced iron powder,and medium-carbon ferromanganese as raw materials,an in-situ synthesized WC particle-reinforced iron-based coating material was fabricated on the surface of Q235 steel via argon arc cladding technology to investigate the effect of tungsten(W)content on the microstructure and properties of carbide-modified steel materials.The results indicate that the cladding coating exhibits a well-defined interface with the Q235 steel substrate,free of pores,cracks,or other defects,and achieves excellent metallurgical bonding.When the molar ratio of W:C is maintained at 1:1.5,an increase in W content promotes the in-situ synthesis of WC particles,significantly enhancing the hardness and wear resistance of the matrix material.As the W content reaches 50%or higher,the number of WC particles increases markedly,forming a uniform and dispersed distribution within the matrix.The Rockwell hardness of the coating material attains 61 HRC or above,and its relative wear resistance reaches approximately 66 times or higher compared to Q235 steel,demonstrating significant improvements in the microstructure and performance of the steel material.
作者
杨燕
唐方
燕盈萍
YANG Yan;TANG Fang;YAN Yingping(Zhangjiajie Aviation Industry Vocational Technical College,Zhangjiajie 427000,Hunan,China;Changsha Tianyi Intelligent Technology Co.,Ltd.,Changsha 410100,Hunan,China)
出处
《中国钨业》
2025年第2期67-73,共7页
China Tungsten Industry
基金
湖南省教育厅科学研究项目(23C1041)。
关键词
钨铁
原位合成
WC
氩弧熔覆
组织
性能
ferrotungsten
in situ synthesis
WC
TIG cladding
microstructure
properties
