C11300(T_3)基体亚音速火焰喷涂层特性的研究  

Study on characteristics of coatings produced by subsonic speed flame spraying on Cl1300(T_3)

作　　者：郭国林[1] 李亚江[1] 段满意[1] 王娟[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061

出　　处：《焊接技术》2005年第2期14-16,i001,共4页Welding Technology

基　　金：山东省自然科学基金资助项目(Y2003F05)

摘　　要：采用亚音速火焰喷涂技术,在C11300(T3)基体表面分别喷碳化钨弥散型钴基和NiCrBSi2种类型的自熔性合金。采用扫描电镜(SEM)和X射线衍射(XRD)等测试方法研究基体与喷涂层之间的界面结合状况、显微组织和喷涂层的物相结构。试验结果表明,基体与喷涂层界面结合状况良好,且存在相互扩散现象,界面处基体组织细化。喷涂过程中碳化钨发生少量热分解和脱碳反应,生成W2C;涂层NiCrBSi中有大量均匀分布的点状CrB生成。随着合金粉末中碳化钨含量的增加,涂层的硬度和耐高温性能也明显提高。Powders of NiCrBSi-based alloy and Co-based dispersive WC alloy were sprayed to C11300(T3) suface, respectively, by using the subsonic speed oxy-acetylene spraying technology. Combination condition between coating and copper base, coating microstructure were investigated by the scanning election microscopy (SEM) and X-ray diffraction, etc. The test results indicated that the combination is good with some diffusion each other. W2C occurred for the thermal disassemble and decarbenizing reaction of a small quantity of WC during spraying of the Co-based dispersive WC alloy. Some CrB phases even-distributing occurred during spraying of the NiCrBSi-based alloy. The micro-hardness and heat-resistant performance of coating increased remarkably with the increase of WC content in spraying alloy powder.

关 键 词：亚音速火焰喷涂 C11300(T3) 碳化钨耐热合金 

分 类 号：TG174.4[金属学及工艺—金属表面处理]