王振廷,周晓辉,张显友,郑维

• 1:哈尔滨理工大学材料科学与工程博士后流动站
• 2:黑龙江科技学院材料科学与工程学院

摘要(Abstract)：

以Ti、B4C和Fe粉为原料,利用氩弧熔敷技术在Q235钢基体表面制备出原位自生TiC-TiB2增强Fe基复合涂层。利用扫描电镜(SEM)、X射线衍射仪(XRD)对涂层的显微组织进行了分析。并分析了TiC和TiB2颗粒的形成机理和氩弧熔池的凝固特性。实验结果表明:熔敷层组织为TiC和TiB2弥散分布在α-Fe中,熔敷层与基体呈冶金结合,无裂纹、气孔等缺陷;涂层中TiC和TiB2的体积分数约为68%。形成机理主要是以固态扩散机制为主,TiC以小颗粒状和花瓣状先析出,后析出的TiB2多以六边形、短棒状存在,TiB2的组织比较粗大,TiC颗粒比较细小,TiB2的含量大于TiC含量。

关键词(KeyWords)： 氩弧熔敷;TiC-TiB2;形成机理;凝固特性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50075085);; 黑龙江省教育厅科学技术研究项目(11511353)

作者(Author): 王振廷,周晓辉,张显友,郑维

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