Formation of hard coatings on cutting edges

Details Formation of hard coatings on cutting edges Formation of hard coatings on cutting edges

C - Chemistry, Metallurgy

23

C

204/96.07

C23C 14/34 (2006.01) B26B 21/60 (2006.01) C23C 14/22 (2006.01)

Patent

CA 1313509

ABSTRACT Formation of hard coating on cutting edges A method of making a cutting edge, which comprises coating a substrate cutting edge having a defined cross- sectional geometry, with a material which is harder than the material of the substrate cutting edge by a vapour deposition or sputtering process, if necessary in the presence of gaseous or vaporised molecules of another element or a compound of another element where it is desired to form the coating of a compound, at a pressure of less than 10-2m bar, while simultaneously subjecting the cutting edge to ion bombardment with ions of sufficient mass and energy to cause sputter removal of the deposited material at a rate which is less than the rate of deposition, whereby a cutting edge formed of the deposited material and having a defined cross- sectional geometry and ultimate tip radius, is obtained.

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