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Title
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Insight into the corrosion behaviors and mechanism of arc discharge plasma nitrided H13 steel in molten Al-Si
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Type
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JournalPaper
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Keywords
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Arc discharge plasma nitriding, Microstructure, Wear, Molten Al-Si corrosion
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Abstract
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AISI H13 steels were nitrided via arc discharge plasma nitriding (ADPN) with various arc currents (55, 70, 85, and 100 A) at 400 °C. The surface microhardness, wear resistance, and molten Al-Si corrosion resistance of nitrided H13 steel exhibited significant enhancements. The surface microhardness and wear resistance of nitrided H13 steel were significantly improved due to the lubricity property of the ɛ-Fe3N phase formed on the surface and the solid solution strengthening of the αN. Meanwhile, the nitrided layer led to a change in the corrosion mechanism from dissolution to pitting. Compressive internal stresses in the nitrided layer inhibited crack formation and promoted passivation layer formation. The high-efficiency ADPN process not only yields a wear-resistant surface but also provides a potential solution for improving the corrosion resistance against molten alloys.
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Researchers
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Shihong Zhang (Not In First Six Researchers), Dongyang Li (Fifth Researcher), Yang Yang (Fourth Researcher), Gobinda Gyawali (Third Researcher), Panpan Yang (Second Researcher), Shangwu Men (First Researcher)
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