FIELD: tool materials, namely tools for plastic working or cutting metals with strengthening coatings.
SUBSTANCE: tool includes hard alloy steel base with strengthening coating. Copper-nickel diffusion layer is used as strengthening coating; said layer is formed by diffusion saturation in melt of eutectic lead-lithium alloy to which copper and nickel are added. In variants of invention diffusion layer is formed in melt of eutectic lead-lithium alloy containing 5 - 10 mass % of copper and 2 - 3 mass % of nickel at temperature of diffusion saturation 1000 - 1200°C.
EFFECT: enhanced strength of tool, improved efficiency of process for plastic working or cutting metals.
2 cl, 2 ex
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