表面宏观粗糙度对Al2O3 + 13wt .% TiO2厚涂层组织和滑动磨损性能的影响

IF 0.6 4区材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING

Revista De Metalurgia Pub Date : 2022-12-27 DOI:10.3989/revmetalm.232

Sara I. Zesati-Belmontes, E. López-Baltazar, J. J. Ruiz-Mondragón, H. Ruiz-Luna, F. Alvarado-Hernández, V. Baltazar-Hernández

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引用次数: 0

摘要

采用螺旋开槽和金刚石滚花两种宏观粗糙度模式对AISI/SAE 1045圆柱钢筋进行了加工。采用多道焊枪沉积Al2O3 + 13wt .-% TiO2粉末。分析了其显微组织、显微硬度和耐磨性。部分熔化和未熔化的颗粒促进了γ-Al2O3和α-Al2O3的存在;而多道次火炬的再加热影响了α-Al2O3中间层的形成，使其由γ-Al2O3→α-Al2O3转变。滚花模式的试样含有较少的缺陷，这是由于适当的板条调节，从而加强了板条间锚固。滑动磨损性能的提高主要受γ-Al2O3(韧性)相和α-Al2O3(硬度)相结合的影响，并主要受滚花模式试样孔隙率和微裂纹的减少的影响。

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Effect of surface macroroughness on the microstructure and sliding wear properties of Al2O3 + 13 wt.% TiO2 thick coatings

ABSTRACT Two macro-roughness patterns namely spiral grooving and diamond knurling were performed on an AISI/SAE 1045 cylindrical steel bar. Al2O3 + 13 wt.-% TiO2 powder was deposited by utilizing a multi-pass torch. Microstructure, microhardness and wear resistance were analyzed. The presence of both γ-Al2O3 and α-Al2O3 throughout the coating was promoted by partially melted and un-melted particles; however, the formation of interlayers of hard α-Al2O3 was influenced by the re-heating during the multi-pass torch causing transformation from γ-Al2O3→α-Al2O3. Knurling pattern specimens contained less defects owe to a suitable splat accommodation thus strengthening the inter-splat anchorage. The improved sliding wear resistance was influenced by both the combination of γ-Al2O3 (toughness) and α-Al2O3 (hardness) phases and, predominantly by the reduced porosity and micro-cracks in specimens with the knurling pattern.

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来源期刊

Revista De Metalurgia 工程技术-冶金工程

CiteScore

1.30

自引率

25.00%

发文量

审稿时长

>12 weeks

期刊介绍： Revista de Metalurgia is a bimonhly publication. Since 1998 Revista de Metalurgia and Revista Soldadura have been combined in a single publicación that conserves the name Revista de Metalurgia but also includes welding and cutting topics. Revista de Metalurgia is cited since 1997 in the ISI"s Journal of Citation Reports (JCR) Science Edition, and in SCOPUS.