反应钎涂碳化物/铁基合金复合涂层的组织结构  

Microstructures of Carbide/Fe-based Alloy Composite Coatings Prepared by Reactive Braze Coating

作　　者：裴新军[1] 黄继华[1] 张建纲[1] 魏世忠 崔新发[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]河南省耐磨材料工程技术研究中心,河南洛阳471003

出　　处：《材料热处理学报》2005年第6期113-116,共4页Transactions of Materials and Heat Treatment

基　　金：河南省杰出人才创新基金资助项目(0421001000)

摘　　要：以钛粉、钛铁粉、铁粉、胶体石墨、铬铁粉和Cr3C2粉为原料,通过真空反应钎涂在低碳钢基体上制备了碳化物/铁基合金复合涂层。利用X射线衍射(XRD),扫描电镜(SEM)和能谱EDS分析了碳化物/铁基合金复合涂层的组织结构。考察了Ti的不同添加方式对复合涂层中组织结构的影响,并探讨了复合涂层中TiC形成机理。结果表明:碳化物/铁基合金复合涂层由Fe基合金基体相,Cr3C2和TiC组成。Ti的添加方式主要影响涂层中的TiC的形态和分布状况,而对Cr3C2的影响很小。分析认为,在碳化物/铁基合金复合涂层中,Ti与C的反应模式有两种,分别与Ti的添加方式相对应。Using titanium, ferrotitanium, iron, carbon and Cr3C2 powder as the raw materials carbide/Fe-based alloy composite coatings were prepared on soft steel substrate by vacuum reactive braze coating. By means of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrum (EDS) the microstructures of carbide/Fe-based alloy composite coatings were studied. The effects of the method of introducing Ti on the morphology of in-situ synthesized TiC in the carbide/Fe-based alloy composite coatings were investigated, and the formation mechanism of TiC was discussed. The results show that the method of introducing Ti has an important effect on the morphology and distribution of TiC of carbide/Fe-based alloy composite coatings, but little effect on Cr3C2. It is thought that the reaction mode of Ti and C varies with the method of introducing Ti in carbide/Fe-based alloy composite coatings.

关 键 词：反应钎涂 碳化物/铁基合金复合涂层 TiC形态 反应模式 

分 类 号：TG457[金属学及工艺—焊接]