灰铸铁玻璃模具材料与镍基合金粉末熔覆性能的研究  

The Performance of Composite Materials Between Gray Iron Glass Mould Material and Ni-based Self-fluxing Alloy Powder

作　　者：刘晴[1] 邵文宝[1] 吴春京[1] 

机构地区：[1]北京科技大学材料学院,北京100083

出　　处：《铸造》2006年第7期723-726,共4页Foundry

基　　金：2003年国家级星火计划项目子课题(项目编号:2003EA690034)

摘　　要：用普通电阻炉加石墨保护的方法成功地在铁素体基灰铸铁及珠光体基灰铸铁基体上制备了镍基自熔性合金粉末复合材料。利用光学显微镜、扫描电镜、显微硬度仪、CMT4305型万能测试仪等分别对复合材料的显微组织、成分分布、显微硬度以及结合强度等进行了观察和测试。试验表明,在基体与覆层熔覆的过程中存在着元素的相互扩散,促进了二者之间的冶金结合,且铁素体基灰铸铁与镍基覆层之间的结合好于珠光体基灰铸铁,另外由于元素的扩散使基体与熔覆层组织的显微硬度呈梯度分布。The Ni-based self-fluxing alloy powder coposite coating was produced on the substrate of ferrite and pearite base gray iron by the general electrical resistance furnace with graphite protection successfully. The microstructure, ingredient distribution, microhardness and bonding strength were investigated and tested by optical microscope, scanning electron microscope, microhardness tester and CMT4305 type universaltester, respectively. It has been shown that the interdiffusion existed between substrate and Ni-based coating, which promoted metallurgical bonding. And the combination of ferrite gray iron and Ni-based alloy was better than that of pearite gray iron. Morever the microhardness of substrate and coating had a gradient distribution because of diffusion.

关 键 词：灰铸铁 镍基自熔性合金粉末 扩散 结合强度 显微硬度 

分 类 号：TG251[金属学及工艺—铸造]