喷涂参数对Cr3C2-NiCr爆轰涂层结构和摩擦学性能的影响

IF 1.5 Q3 ENGINEERING, MECHANICAL
B. Rakhadilov, D. Kakimzhanov, M. Dautbekov, Zhuldyz Sagdoldina, M. Adylkanova, R. Abylkalykova
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引用次数: 1

摘要

本文研究了喷射参数对爆轰火焰喷涂涂层的微观结构、相组成和摩擦学性能的影响。实验结果表明,Cr3C2-NiCr涂层在爆轰喷涂过程中的化学成分取决于爆炸气体混合物填充筒体的程度。当爆炸性混合气体填充量为73%时,碳化物含量降低;当爆炸性混合气体填充量为57%时,碳化物含量增加。结果表明:填充度的减小导致Cr3C2-NiCr涂层硬度和耐磨性的提高,57%沉积时涂层的硬度和耐磨性高于65%和73%沉积时;这是由于碳化物相Cr3C2的增加。通过改变喷涂参数,研制了爆轰火焰喷涂Cr3C2-NiCr梯度涂层。结果表明,在梯度涂层中,Cr3C2-NiCr碳化物相从深度到表面逐渐增加。得到的靠近基体的梯度涂层由CrNi3相组成,而涂层表面由CrNi3和Cr3C2相组成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of Spraying Parameters on the Structure and Tribological Properties of Cr3C2-NiCr Detonation Coatings
In this work, the influence of spray parameters on the formation of the microstructure, phase composition, and the tribological properties of detonation flame sprayed coatings was studied. It was determined that the chemical composition of Cr3C2-NiCr coatings during detonation spraying depends on the degree of filling the barrel with an explosive gas mixture. The degree of filling the barrel with an explosive gas mixture at 73% leads to a decrease in the content of carbide phases, and at 57% filling of the barrel, an increase in carbide phases is observed. It is established that the decrease of the filling degree leads to the increase of hardness and wear resistance of the Cr3C2-NiCr coatings since the hardness and wear resistance of the coating material deposited at 57% is higher than at 65% and 73%; this is due to the increase in the carbide phase Cr3C2. Detonation flame sprayed Cr3C2-NiCr gradient coatings have been developed in this study, which is carried out by varying the spray parameters. It was found that in the gradient coating, Cr3C2-NiCr carbide phases gradually increase from the depth to the surface. The obtained gradient coating closer to the substrate consists of the CrNi3 phase, while the coating surface consists of CrNi3 and Cr3C2 phases.
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来源期刊
Advances in Tribology
Advances in Tribology ENGINEERING, MECHANICAL-
CiteScore
5.00
自引率
0.00%
发文量
1
审稿时长
13 weeks
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