粉末冶金材料科学与工程
粉末冶金材料科學與工程
분말야금재료과학여공정
POWDER METALLURGY MATERIALS SCIENCE AND ENGINEERING
2013年
5期
735-740
,共6页
Al2CrFeCoxCuNiTi高熵合金%激光熔覆%显微硬度%耐磨性能%耐蚀性能
Al2CrFeCoxCuNiTi高熵閤金%激光鎔覆%顯微硬度%耐磨性能%耐蝕性能
Al2CrFeCoxCuNiTi고적합금%격광용복%현미경도%내마성능%내식성능
Al2CrFeCoxCuNiTi high-entropy alloys%laser cladding%microhardness%wear resistance%corrosion resistance
利用激光熔覆法制备Al2CrFeCoxCuNiTi高熵合金涂层，利用带有能谱的扫描电镜(SEM/EDS)、X射线衍射仪、显微/维氏硬度计、磨料磨损试验机、电化学工作站等对 Al2CrFeCoxCuNiTi 高熵合金组织结构进行分析并测试其硬度、耐磨性、耐蚀性。结果表明：Al2CrFeCoxCuNiTi高熵合金涂层组织主要由等轴晶组成，等轴晶上分布有纳米尺度的球状粒子；高熵合金涂层主要由FCC+BCC1+BCC2+Laves相组成；随Co含量增多，FCC结构增多，BCC结构减少，Al2CrFeCoxCuNiTi高熵合金涂层表面显微硬度及耐磨性降低，硬度最高值为1013 HV，约为基体的5倍；相对耐磨性最高值为3.77。Al2CrFeCoxCuNiTi高熵合金涂层的耐蚀性能优异，Co2.0合金与Q235不锈钢相比，自腐蚀电位正移0.15 V，自腐蚀电流密度降低2个数量级。
利用激光鎔覆法製備Al2CrFeCoxCuNiTi高熵閤金塗層，利用帶有能譜的掃描電鏡(SEM/EDS)、X射線衍射儀、顯微/維氏硬度計、磨料磨損試驗機、電化學工作站等對 Al2CrFeCoxCuNiTi 高熵閤金組織結構進行分析併測試其硬度、耐磨性、耐蝕性。結果錶明：Al2CrFeCoxCuNiTi高熵閤金塗層組織主要由等軸晶組成，等軸晶上分佈有納米呎度的毬狀粒子；高熵閤金塗層主要由FCC+BCC1+BCC2+Laves相組成；隨Co含量增多，FCC結構增多，BCC結構減少，Al2CrFeCoxCuNiTi高熵閤金塗層錶麵顯微硬度及耐磨性降低，硬度最高值為1013 HV，約為基體的5倍；相對耐磨性最高值為3.77。Al2CrFeCoxCuNiTi高熵閤金塗層的耐蝕性能優異，Co2.0閤金與Q235不鏽鋼相比，自腐蝕電位正移0.15 V，自腐蝕電流密度降低2箇數量級。
이용격광용복법제비Al2CrFeCoxCuNiTi고적합금도층，이용대유능보적소묘전경(SEM/EDS)、X사선연사의、현미/유씨경도계、마료마손시험궤、전화학공작참등대 Al2CrFeCoxCuNiTi 고적합금조직결구진행분석병측시기경도、내마성、내식성。결과표명：Al2CrFeCoxCuNiTi고적합금도층조직주요유등축정조성，등축정상분포유납미척도적구상입자；고적합금도층주요유FCC+BCC1+BCC2+Laves상조성；수Co함량증다，FCC결구증다，BCC결구감소，Al2CrFeCoxCuNiTi고적합금도층표면현미경도급내마성강저，경도최고치위1013 HV，약위기체적5배；상대내마성최고치위3.77。Al2CrFeCoxCuNiTi고적합금도층적내식성능우이，Co2.0합금여Q235불수강상비，자부식전위정이0.15 V，자부식전류밀도강저2개수량급。
The Al2CrFeCoxCuNiTi high-entropy alloy coating was prepared by laser cladding. Scanning electron microscopy with spectroscopy (SEM/EDS), X-ray diffraction meter, micro/Vickers hardness tester, wear testing machine, and electrochemical workstation were used to test the structure and hardness, wear resistance and corrosion resistance of Al2CrFeCoxCuNiTi high-entropy alloys. The results show that the main microstructure of Al2CrFeCoxCuNiTi high entropy alloy coating is isometric and nanometer scale globular particles, the coating phase is mainly composed of FCC+BCC1+BCC2+Laves phase;With the increase of the Co content, FCC structure increases, BCC structure decreases, both the coating surface microhardness and relative wear resistance show reducing trend, the value of the highest microhardness and the highest relative wear resistance are of 1 013 HV and 3.77, respectively. The Co2.0 alloy coating shows excellent corrosion resistance, compared with matrix steel Q235, the corrosion potential is shift to positive direction for 0.15 V, the corrosion current density decreases two orders of magnitude.
