Patent ID: 7373857

Claim:
A method of making a composite cutting tool having two dissimilar metals, comprising: (a) providing a metal base comprised of a first metal and having first and second opposing surfaces, said base having at least one longitudinal depression in at least one of said first and second opposing surfaces; (b) introducing a wire comprised of a second metal into said at least one depression of the metal base to form a composite assembly, said second metal comprising a cutting tool grade steel and being harder than the first metal; (c) heating the composite assembly under pressure to urge the adjacent surfaces of the wire and the at least one depression together to form a bonded article and to reduce the thickness of the metal base at least at the wire/base interface; (d) constraining a lateral spread of the composite assembly using a turks head during at least a portion of the step of heating under pressure under conditions to maintain a lateral bonding pressure on the composite assembly; and (e) forming the bonded article into a cutting tool having a cutting edge comprising cutting tool grade steel.