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Vanadium pentoxide, borax, boron carbide and sodium fl uoride were used to grow vanadium carbide coating on surface of Cr12 steel at 950 °C by TD process. The coating of vanadium carbide (VC) extended the serve-life period of Cr12 steel as punching die. Kinetics of vanadium carbide coating growth was brought forward and verified by comparison of the mathematical model with the experimental results...
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