Research on the Carbides of Its Alloying Layer Conducted by W-Mo-Y Surface Alloying and Carburizing Process

Abstract:

Q235 steel was processed by solid carburizing and quenching after conducted by W-Mo-Y double glow-discharge plasma surface alloying process. Finally carbon contents, the morphologies and phases of the samples' surface were analyzed. The results show as follows: Carbon contents of the samples' surface are 1.28 wt%, 1.36 wt%, 1.51 wt% respectively after W-Mo-Y alloying layer (also called co-penetrated layer) was processed by solid carburizing at 960 °C, 980 °C, 1020 °C respectively; The amount of the carbides in W-Mo-Y alloying layer is obviously more than that of the carbides in W-Mo alloying layer; The granular carbides distribute dispersively and uniformly in alloying layer, and the sizes of carbide particle are less than 1 μm; There is no eutectic carbide at the grain boundaries; With temperatures of carburizing and quenching process rising, the carbides increases in number; After W-Mo-Y alloying layer was carburized and quenched at 1020 °C, the phases of alloying layer are Fe2C, W2C, Fe2MoC, MoC, Fe3C, Mo2C and Y2C3; and the types of their carbides are M3C, M2C, and MC, which are different from the types of W-Mo carbides in general metallurgy high-speed steel (HSS). It can be seen from the available, the morphologies, the sizes and the amount of surface HSS's carbides can be adjusted by heat treatment.

• Periodical: Advanced Materials Research (Volumes 472-475)
• Pages: 2891-2895
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.472-475.2891
• Online since: February 2012
• Authors: Hang Wei Cai, Hong Guan Wu, Zhi Kang Ma, Cheng Lei Wang, Lin Yuan, Wei Zhang, Bing Li, Yuan Gao
• Keywords: Solid Carburizing and Quenching, The Double Glow Plasma, W-Mo-Y Alloying

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