热压合成铁基表面涂层的微观结构研究  

Study on Microstructure of Coating on Fe Surface Synthesized by Hot Pressing Technology

作　　者：李新星[1] 杨子润[2] 

机构地区：[1]宿迁学院金属材料教研室,江苏宿迁223800 [2]盐城工学院材料工程学院,江苏盐城224000

出　　处：《热加工工艺》2015年第18期160-163,共4页Hot Working Technology

基　　金：江苏省教育厅自然科学基金资助项目(13KJD430004);2013年宿迁学院科研基金资助项目(2013KY17);江苏省自然科学基金资助项目(BK2012250);江苏省材料摩擦学重点实验室开放研究课题(Kjsmcx201302)

摘　　要：采用真空热压法制备出铁基表面Ni3Al涂层、TiC/Ni3Al涂层及TiC/Ni3Al-Ni3Al双层涂层,研究了不同涂层的微观结构及相组成,并用洛氏硬度计对涂层剖面进行了硬度测试。结果表明:TiC/Ni3Al-Ni3Al双层涂层结合了Ni3Al涂层、TiC/Ni3Al涂层两者的优点。表层涂层的微观组织为TiC颗粒较为均匀的分布在Ni3Al基体上,组织纯净、致密,过渡层Ni3Al相与表层涂层及钢基体之间均为良好的冶金结合。TiC/Ni3Al-Ni3Al双层涂层既维持了TiC/Ni3Al涂层的高硬度,又实现了从表层至基体之间性能的梯度过度。Ni3Al coating,TiC particulates reinforced Ni3Al matrix composite coating as well as TiC particulates reinforced Ni3Al composite and Ni3Al double coatings were fabricated by vacuum hot-pressing technology. The microhardness of the coating profiles was tested by Rockwell hardness tester. Results show that TiC particulates reinforced Ni3Al matrix composite and Ni3Al double coatings combines the advantages of both of the TiC particulates reinforced Ni3Al matrix composite coating and Ni3Al coating. The microsructure of the surface coating is TiC particulates relatively uniformly mounted in Ni3Al matrix,which is pure and dense. The intermediate Ni3Al layer is compactly formed between Fe matrix and TiC particulates reinforced Ni3Al matrix composite with metallurgical bonding interfaces. The TiC particulates reinforced Ni3Al matrix composite and Ni3Al double coatings not only maintaines the high hardness of TiC particulates reinforced Ni3Al matrix composite,but also realizes the gradient variation of the property from surface to matrix.

关 键 词：涂层 TI C/Ni3Al 显微组织 硬度 

分 类 号：TG174.44[金属学及工艺—金属表面处理]