Effect of Thermal Spraying Method on the Microstructure and Wear Behaviour of FeNiCrBSiC-CrB2 Coating
Effect of Thermal Spraying Method on the Microstructure and Wear Behaviour of FeNiCrBSiC-CrB2 Coating
复制标题
热喷涂方法对FeNiCrBSiC-CrB2涂层显微组织和磨损行为的影响
DOI：
10.4028/www.scientific.net/kem.799.37
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
D. Goljandin
中科院分区：
文献类型：
--
作者：
O. Umanskyi;M. Storozhenko;M. Antonov;O. Terentyev;O. Koval;D. Goljandin
研究了等离子喷涂和爆炸喷涂工艺对FeNiCrBSiC-20wt%CrB2涂层组织和磨损性能的影响。结果表明，涂层由（Fe，Cr）2 B、（Ni，Fe，Cr）B、（Cr，Fe，Ni，Mo）B等硼化物相增强的Fe、Ni基固溶体基体组成。等离子喷涂层与爆炸喷涂层的主要显微组织差异在于硬质硼化物颗粒的形貌、尺寸和分布。在20、200和400 °C的干摩擦条件下对涂层与Al 2 O3球的摩擦学行为进行了研究。爆炸喷涂涂层在高温下的磨损量稍低，而等离子喷涂涂层在所有温度下的磨损量相同。磨损表面的研究表明，磨料和氧化磨损机制被证明是占主导地位的FeNiCrBSiC-20 wt.% CrB 2等离子喷涂层的磨损特征为脆性剥落和氧化磨损，爆炸喷涂层的磨损特征为脆性剥落和氧化磨损。在高温下，由于剥落分层，未增强的商业FeNiCrBSiC等离子喷涂涂层的滑动磨损损失比增强（硼化铬）涂层的滑动磨损损失高2-3倍。
In this study, the influence of plasma and detonation spraying techniques on the microstructure and wear behaviour of FeNiCrBSiC-20wt%CrB2 coating was investigated. The obtained coatings were found to comprise of Fe, Ni-based solid solution matrix reinforced with mixed boride phases (Fe,Cr)2B, (Ni,Fe,Cr)B, (Cr,Fe,Ni, Mo)B. The main microstructural differences of the plasma and detonation sprayed coatings are the morphology, the size and the distribution of hard boride particles. The tribological behaviour of coatings was examined under dry sliding conditions against Al2O3 ball at 20, 200 and 400 °C. The wear loss of detonation sprayed coatings was slightly lower at high temperatures while plasma sprayed coating had same wear at all temperatures. The investigation of worn surfaces revealed that abrasive and oxidative wear mechanisms are proved to be dominant for FeNiCrBSiC−20wt.%CrB2 plasma sprayed coatings, while brittle delamination and oxidative wear are characteristic for detonation sprayed coating. The sliding wear loss of the unreinforced commercial FeNiCrBSiC plasma sprayed coating was 2-3 times higher than that of reinforced (with chromium boride) coating at high temperatures due to splat delamination.