METHOD FOR INCREASING WEAR RESISTANCE OF ARTICLES FROM HARD ALLOYS Russian patent published in 2016 - IPC C23C12/02 C23C10/26 

FIELD: technological processes.

SUBSTANCE: invention relates to technologies for increasing wear resistance of cutting, punching tools, as well as structural articles from hard alloy due to change composition and structure of their surface layers, and can be used for increasing resistance to mechanical and corrosion-mechanical wear. Method of diffusion saturation of the article from hard alloy in low-melting lead-bismuthic melt involves preliminary short-term high-temperature carbonization products and subsequent diffusion saturation of its surface in low-melting lead-bismuthic melt containing titanium in dissolved state and in which cobalt in powder or a compact form. Said cementation is carried out at temperature of 1,150-1,300°C for 10-20 minutes. Low-melting lead-bismuthic melt for diffusion saturation contains the following ratio, wt%: lead 38-48, bismuth 50-55, titanium 1-5 and cobalt 1-2.

EFFECT: higher wear resistance and operating life of items from hard alloys in conditions of high contact stresses, as well as efficiency of process.

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