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- W4376287898 abstract "Iron-based alloys have been widely used as high-temperature galling resistant coatings. In this study, we designed and prepared a galling-resistant coating using plasma transferred arc welding with cored wires of varying nitrogen content. Our approach was based on the concept that nitrogen alloying can lead to the formation of hard precipitates and promote strain-induced phase transformations. The coating was primarily composed of austenite, and as the nitrogen content increased, the grain size decreased and the amount of nitride precipitation increased. The threshold galling stress of this cobalt-free coating was found to reach 80% of that of a laser-clad Stellite 21 coating at 300 °C. Following the galling test, the hardness of the worn area increased and a phase transformation from austenite to martensite occurred beneath the worn surface. The improvement in galling resistance under dry heavy load sliding conditions can be attributed to the synergistic effect resulting from multiple strengthening mechanisms, including fine-grain strengthening, second phase strengthening and phase transformation strengthening." @default.
- W4376287898 created "2023-05-13" @default.
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- W4376287898 date "2023-09-01" @default.
- W4376287898 modified "2023-09-25" @default.
- W4376287898 title "Design and performance of nitrogen-alloyed iron-based coating for enhancing galling resistance by plasma transferred arc welding" @default.
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- W4376287898 doi "https://doi.org/10.1016/j.matlet.2023.134535" @default.
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