γ-TiAl金属间化合物合金激光熔敷高温自润滑耐磨复合材料涂层  

Laser Cladding for High-Temperature Self - Lubricating Wear-Resistant Composite Coatings on γ-TiAl Intermetallic Alloy Ti - 48Al - 2Cr - 2Nb

作　　者：刘秀波[1] 王春敏[1] 于利根[1] 王华明[1] 

机构地区：[1]北京航空航天大学激光材料加工与表面工程实验室,北京100083

出　　处：《应用激光》1999年第5期221-224,共4页Applied Laser

基　　金：航空基础科学基金资助项目!98H51071

摘　　要：以 Ｎｉ８ＯＣｒ２０、Ｃｒ_３Ｃ_２、Ａｒ、ＣａＦ_２／ＢａＦ_２四元混合粉末为原材料，利用激光熔敷技术在ｒ－ＴｉＡｌ金属间化合物合金Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ表面上制得了以ｒ一ＮｉＣｒ为基体、以初生Ｍ_７Ｃ_３及Ｍ_（２３）Ｃ_６为耐磨相、以弥散分布颗粒Ａｇ、ＣａＦ_２或ＣａＡｇＦ_４为自润滑相的高温自润滑耐磨复合材料涂层，涂层显微硬度大大提高且与基体呈冶金结合。in this paper, laser cladding technology was used to fabricate a new high temperature self - lubricating wear - resistant composite coating on the substrate of a γ- TiAl intermetallic alloy Ti - 48Al - 2Cr - 2Nb. The hybrid composite coating mainly consists of rapidly solidified wear - resistant primary plate M_7C_3, M_(23)C_6 and self -lubricating Ag and CaF_2 or CaAgF_4 particles and the oxidation - resistant γ-NiCr matrix. Microstructure and hardness within the whole laser clad composite coating is homogeneous and the bonding to the substrate is purely metallurgical.

关 键 词：Γ-TIAL 激光熔敷 显微组织 复合材料涂层 

分 类 号：TG174.44[金属学及工艺—金属表面处理] TN249[金属学及工艺—金属学]