Effect of Inter-Splat Bonding Quality on the Dependence of Wear Behavior of Plasma-Sprayed Stainless Steel Coating on Applied Load

IF 3.2 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Thermal Spray Technology Pub Date : 2024-05-06 DOI:10.1007/s11666-024-01774-8

Xian-Jin Liao, Li Zhang, Yin-Qiu Sun, Xiao-Tao Luo, Cheng-Xin Li, Guan-Jun Yang, Chang-Jiu Li

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Abstract

304 stainless steel (304SS) powder and novel Mo-cladded 304SS (304SS-Mo) powder were used as feedstocks to prepare metallic coatings with different inter-splat bonding qualities. Wear test was conducted to examine the dependence of wear behavior on the inter-splat bonding quality. The results showed that poor inter-splat bonding leads to much lower wear resistance in conventional 304SS coating relative to that of 304SS bulk, especially at high loading conditions (>75 N), where the wear rate increased to 5.53 × 10⁻³ mm³/(m⋅N) by 3.5 times higher than that at low-load range. However, the novel 304SS-Mo coating with metallurgical inter-splat bonding and minimized oxide inclusions exhibited a low wear rate comparable to that of 304SS bulk. Failure analysis of worn samples suggests that splat delamination contributes to low wear resistance of the 304SS coating; conversely, the absence of splat delamination results in higher wear resistance of the 304SS-Mo coating. Using Mo-cladded powders, significantly enhanced inter-splat bonding enables the use of plasma-sprayed metallic coating under high-load wear conditions. The strong dependence of wear resistance on the load in conventional coating implies that evaluation of wear performance of thermally sprayed metallic coating should consider both the wear rate and critical load.

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板间结合质量对等离子喷涂不锈钢涂层磨损行为与外加载荷关系的影响

以 304 不锈钢（304SS）粉末和新型钼包覆 304SS （304SS-Mo）粉末为原料，制备了具有不同板间结合质量的金属涂层。进行了磨损测试，以检验磨损行为对板间结合质量的依赖性。结果表明，板间结合不良导致传统 304SS 涂层的耐磨性大大低于 304SS 主体涂层，尤其是在高负载条件下（75 N），磨损率增至 5.53 × 10-3 mm3/（m⋅N），是低负载范围的 3.5 倍。然而，新型 304SS-Mo 涂层具有冶金板间结合和最小氧化物夹杂，磨损率低，与 304SS 主体相当。对磨损样品的失效分析表明，飞溅分层是造成 304SS 涂层耐磨性低的原因之一；相反，如果没有飞溅分层，304SS-Mo 涂层的耐磨性会更高。使用钼包覆粉末可显著增强板层间的结合力，从而在高负荷磨损条件下使用等离子喷涂金属涂层。传统涂层的耐磨性与载荷有很大关系，这意味着在评估热喷涂金属涂层的耐磨性能时，应同时考虑磨损率和临界载荷。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.