Method for producing edged tools

Details Method for producing edged tools Method for producing edged tools

1982-04-06

1984-06-12

Silverberg, Sam

Metal treatment

Compositions

Heat treating

148 167, 148144, 148 315, 148 611, 3034653, 428626, C21D 148

Patent

active

044539878

ABSTRACT:
A method for producing an edged tool which has an excellent cutting ability and durability, which comprises immersing an edged-tool material in a molten-salt bath containing a carbide-forming element, such as a Va Group element, titanium, chromium or manganese, to form a carbide layer on the surface of the edged-tool material; heating the edged-tool material to a temperature not lower than the austenite-transformation temperature of the material in a non-oxidizing gas atmosphere for a predetermined period of time; and rapidly cooling the heated material to harden it. According to the improved method of the present invention, the edged tool (having an excellent cutting ability and durability) is produced without grinding the formed carbide layer on the surface thereof.

REFERENCES:
patent: 3615908 (1971-10-01), Waterfall

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