激光技术Issue(4)：462-465,4.DOI:10.7510/jgjs.issn.1001-3806.2015.04.007
激光原位合成 TiC－TiB2／Fe复合涂层及其抗氧化性研究
Study on laser in-situ synthesized TiC-TiB2/Fe composite coating and its oxidation resistance
摘要
Abstract
In order to improve the high-temperature oxidation resistance of materials , TiC-TiB2/Fe composite coating was in-situ synthesized by laser cladding .The data of phase , microstructure and oxidation resistance of composite coating were obtained after theoretical analysis and experimental verification .The results indicate that the phases of composite coating are mainly composed of α-Fe, TiC, TiB2 and ( Fe, Cr ) 7 C3 etc.The fine block-shaped TiC particles and strip-shaped TiB2 disperse on the coating substrate uniformly .The continuous and compact oxidation film is formed on the surface of TiC-TiB2/Fe composite coating after being oxidized isothermally at 600℃for 60h.The oxidation film consists of fine and spherical oxides such as Fe2O3, FeCr2O4, ( Cr, Fe)2O3, rutile TiO2 and Al2O3 and so on, arranged closely. Thermodynamic conditions of oxide formation are satisfied .The oxidation kinetic curve of composite coating at constant temperature of 600℃ is parabolic.The rate of oxidation weight gain is much higher during the initial 10h, and then becomes slower gradually .The oxidation weight gain is 0.75mg/cm2 after being oxidized for 60h.The oxidation resistance of composite coating is 15 times higher than that of semi-steel.The results have some guiding significance to improve the high-temperature oxidation resistance of materials .关键词
激光技术/复合涂层/原位合成/抗氧化性Key words
laser technique/composite coating/in-situ synthesis/oxidation resistance分类
通用工业技术引用本文复制引用
周芳,刘其斌,何良华..激光原位合成 TiC－TiB2／Fe复合涂层及其抗氧化性研究[J].激光技术,2015,(4):462-465,4.基金项目
贵州省教育厅自然科学研究资助项目（黔教科（2011）044号） （）
