一种钴基耐磨材料的高温氧化行为  

Oxidation Behavior of a Cobalt-Based Wear-Resistant Alloy

作　　者：凌晨[1] 李尚平 刘栋 侯杰 梁湘华 骆合力 Ling Chen;Li Shangping;Liu Dong;Hou Jie;Liang Xianghua;Luo Heli(High Temperature Materials Institute,Central Iron and Steel Research Institute,Beijing 100081,China;Gaona Aero Material Co.,Ltd,Beijing 100081,China;AECC Guiyang Aero-Engine Research Institute,Guiyang 550081,China)

机构地区：[1]钢铁研究总院高温材料研究所,北京100081 [2]北京钢研高纳科技股份有限公司,北京100081 [3]中国航发贵阳发动机设计研究所,贵州贵阳550081

出　　处：《稀有金属材料与工程》2023年第5期1708-1716,共9页Rare Metal Materials and Engineering

基　　金：国家军品配套项目。

摘　　要：研究了NbC颗粒增强钴基耐磨材料在950~1050℃空气中的氧化行为。合金在950℃下属于抗氧化级,1000℃下属于次抗氧化级,1050℃下属于弱抗氧化级,氧化动力学曲线基本符合抛物线规律。合金表面形成由CoCr_(2)O_(4)、CoNb_(2)O_(6)、Cr_(2)O_(3)和Al_(2)O_(3)组成的混合氧化物层,基体中块状NbC的优先原位氧化行为造成氧化层厚度不均匀且疏松多孔。经过1050℃,100 h氧化后,氧化层下方基体中形成贫Cr层,导致氧化皮剥落后无法重新形成具有保护作用的连续氧化膜。The oxidation behavior of NbC particle-reinforced cobalt-based wear-resistant alloy in the air from 950 to 1050℃was investigated.The alloy belongs to the oxidation-resistant level below 950℃,the sub-oxidation-resistant level below 1000℃,and the non-oxidation-resistant level below 1050℃.The oxidation kinetic curves basically comply with the parabolic law.A mixed oxide layer consisting of CoCr_(2)O_(4),CoNb_(2)O_(6),Cr_(2)O_(3),and Al_(2)O_(3) is established on the alloy surface.The preferential in-situ oxidation behavior of the blocky NbC phase in the matrix results in the loose porous oxide layer and a non-uniform thickness.After oxidation at 1050℃for 100 h,a Cr-depletion zone is formed in the matrix below the oxide layer,leading to the inability to re-form a continuous and protective oxide film after oxide peeling.

关 键 词：高温耐磨材料 高温氧化 氧化动力学 

分 类 号：TB333[一般工业技术—材料科学与工程]