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首页> 外文期刊>Journal of Materials Engineering and Performance >Microstructure and Wear Resistance of FeCrBSi Plasma-Sprayed Coating Remelted by Gas Tungsten Arc Welding Process
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Microstructure and Wear Resistance of FeCrBSi Plasma-Sprayed Coating Remelted by Gas Tungsten Arc Welding Process

机译：气体钨弧焊工艺重新熔化FECRBSI等离子体喷涂涂层的组织和耐磨性

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摘要

Herein, an FeCrBSi coating was fabricated via plasma spray on AISI1045 steel, and subsequently, a gas tungsten arc welding (GTA) process was employed to remelt the coating. The microstructure, microhardness, fracture toughness and surface roughness of the coating before and after remelting were investigated, as well as the wear resistance was tested by a UMT-3-type sliding wear apparatus. The results showed that, upon remelting, most defects in the as-sprayed coating were effectively eliminated, the surface roughness decreased by 43%, and the coating-substrate interface bonding changed from mechanical to metallurgical. The phase composition of the as-sprayed coating was primarily alpha-Fe and a small amount of hard Fe3B phase, while the remelted coating consisted of alpha-Fe and (Fe,Cr)(23)C-6 and a small quantity of CrB. In addition, remelting the coating was found to induce a 287.6% increase in the fracture toughness, a 33.4% increase in the average microhardness, and a 47.5% decrease in the wear volume, while the failure mechanism changed from abrasive wear to fatigue wear upon remelting. Therefore, GTA remelting of plasma-sprayed coating was found to be a feasible method to obtain a coating with good wear resistance.
机译：在此，通过等离子体喷雾在AISI1045钢上制造FECRBSI涂层，随后，采用气体钨弧焊（GTA）工艺来重温涂层。研究了涂层前后涂层的微观结构，显微硬度，断裂韧性，以及通过UMT-3型滑动磨损装置测试耐磨性。结果表明，在重熔时，有效地消除了涂抹涂层中大多数缺陷，表面粗糙度降低了43％，涂层基板界面粘合从机械变为冶金。喷涂涂层的相组合物主要是α-Fe和少量的硬质Fe3b相，而重熔涂层由α-Fe和（Fe，Cr）（23）C-6和少量CRB组成。 。此外，发现涂层的重熔诱导裂缝韧性增加287.6％，平均微硬度增加33.4％，磨损体积减少47.5％，而失效机制从磨损磨损变为疲劳磨损重新冻结。因此，发现血浆喷涂涂层的GTA重熔是获得具有良好耐磨性的涂层的可行方法。

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