M42/45钢双金属复合材料的SPS烧结及其界面研究  

Interface of M42/45 steel bimetal composite sintered by spark plasma sintering

作　　者：游航[1] 王贤瑞[1] 梁翠[1] 徐金富[1,2] 

机构地区：[1]华东理工大学材料科学与工程学院,上海200237 [2]宁波工程学院材料工程研究所,浙江宁波315016

出　　处：《金属热处理》2011年第10期25-28,共4页Heat Treatment of Metals

基　　金：宁波市自然科学基金项目(2010A610152)

摘　　要：利用放电等离子烧结技术(SPS)实现了M42粉末高速钢的制备及与45钢的连接,对其界面的显微组织形貌、元素分布、显微硬度及相界面形成过程进行了测试分析。结果表明,接头过渡层的成分、显微硬度都呈现梯度变化,连接界面没有裂纹及大孔洞出现,界面结合紧密,其过渡层厚度可达10.2μm;界面连接为熔合连接与扩散连接的共同作用,其中烧结初期以熔合连接为主,烧结中后期,扩散连接逐渐成为主导。The fabrication of M42 powder metallurgy high speed steel followed by jointing to 45 steel was accomplished at one step via spark plasma sintering（SPS） technology.Its interface＇s microstructure appearance,element distribution,microhardness and interface forming process were tested and analysed.The results show that the composition of the transition layer and microhardness of M42/45 steel joints exist as a gradient distribution.The joint hasn＇t distortion and microcracks,the thickness of transition layer up to 10.2 μm.The jointing of M42/45 steel interface is a comprehensive synergy both fusion bonding and diffusion bonding mechanism.The former one takes priority at the early sintering process,while the later one becomes dominant over the followed sintering process.

关 键 词：M42粉末高速钢 45钢 放电等离子烧结 双金属复合材料 界面 扩散 

分 类 号：TB331[一般工业技术—材料科学与工程]