摘要
为了探讨等离子喷涂制备Al2O3-TiO2-Cr2O3-SiO2层的可行性及其喷涂层的耐磨性,采用等离子喷涂在Q235钢表面分别制备了54%Al2O3-36%TiO2-10%Cr2O3-0.5%SiO2,42%Al2O3-28%TiO2-28.5%Cr2O3-1.5%SiO2和30%Al2O3-20%TiO2-47.5%Cr2O3-2.5%SiO23种陶瓷层,分析了陶瓷涂层的金相显微形貌、显微硬度及耐磨粒磨损性能,并分析了其耐磨粒磨损的机理。结果表明:3种涂层的显微硬度分布均具有梯度分布特性,Al2O3+Cr2O3硬质相含量越高,涂层硬度越大;30%Al2O3-20%TiO2-47.5%Cr2O3-2.5%SiO2喷涂粉制成的涂层的硬度最大,耐磨粒磨损性能最佳。
Three kinds of Al2O3-TiO2-Cr2O3-SiO2 ceramic composite coatings with different compositions(54% A12O3-36% TiO2-10% Cr2O3-0.5% SiO2,42% Al2O3-28% TiO2-28.5% Cr2O3-1.5% SiO2,30% A12O3-20% TiO2-47.5% Cr2O32.5%SiO2) were prepared on the surface of Q235 steel by plasma spraying.The morphology of as-obtained ceramic composite coatings was observed,and their microhardness and abrasive wear resistance were also measured.Moreover,the abrasive wear mechanisms of the ceramic composite coatings were discussed.It was found that the microhardness of all the three kinds of as prepared ceramic composite coatings was dominated by gradient distribution,and the microhardness of the composite coatings rose with increasing content of hard phases(Al2 O3 + Cr2 O3).Parti cularly,the ceramic composite coating 30% A12O3-20% TiO247.5%Cr2O3-2.5%SiO2 had the highest microhardness and the best abrasive wear resistance.
出处
《材料保护》
CAS
CSCD
北大核心
2013年第4期32-34,8,共3页
Materials Protection
