Equiatomic replacement of tungsten with molybdenum up to K=0.7 also leads to equiatomic replacement in carbides; with further substitution the percentage of molybdenum in the carbide increases.
The solubility of the carbide in the steel is highest with K=0.7.
The replacement of tungsten with molybdenum in high-speed steel is advisable.
Taking into account the solubility of carbide in austenite, the properties are optimal with K=0.7, which is numerically equal to the same wt. % of tungsten and molybdenum in the steel.
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Gulyaev, A.P., Kupalova, I.K. & Baikov, A.M. Investigation of the carbide phase in W−Mo high-speed steels. Met Sci Heat Treat 14, 680–682 (1972). https://doi.org/10.1007/BF00647908
- Carbide Phase