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- W2890178725 abstract "Laser forming repair (LFR) technology has considerable potential in high strength steel structure repair. 34CrNiMo6 steel has been widely used in high-value components, and it is imperative to repair these damaged components. In this study, two different thicknesses of repaired layers are deposited on the 34CrNiMo6 wrought substrate with five layers and 20 layers via LFR technology. The microstructure, phases, microhardness, and tribological properties are analyzed using optical microscopy, scanning electron microscopy, X-ray diffraction, Vickers hardness testing, and dry sliding wear testing. These results show that the 34CrNiMo6 repaired layers were successfully deposited on the substrate. The microstructure of the laser-repaired layers in the five-layer sample included bainite and retained austenite. For the 20-layer sample, the microstructure in the top of the repaired layers was still bainite and retained austenite, whereas that in the bottom of the repaired layers was transformed into ferrite and cementite. The average coefficients of friction of repaired layers is not significantly different from the substrate. The wear rate of the five LFR layers, 20-layer LFR, and substrate samples were 12.89 × 10-6, 15 × 10-6, and 23.87 × 10-6 mm³/N·m, respectively. The laser forming repaired samples had better wear resistance compared to the substrate. The wear mechanism of laser forming repaired samples is abrasive wear; whereas that of the substrate is abrasive wear and fatigue wear." @default.
- W2890178725 created "2018-09-27" @default.
- W2890178725 creator A5013508138 @default.
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- W2890178725 date "2018-09-14" @default.
- W2890178725 modified "2023-09-26" @default.
- W2890178725 title "Microstructure and Tribological Properties of Laser Forming Repaired 34CrNiMo6 Steel" @default.
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- W2890178725 doi "https://doi.org/10.3390/ma11091722" @default.
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