Method of increasing useful life of tool steel cutting tools

Details Method of increasing useful life of tool steel cutting tools Method of increasing useful life of tool steel cutting tools

C - Chemistry, Metallurgy

23

C

204/96.05

C23C 14/46 (2006.01) C23C 14/02 (2006.01)

Patent

CA 1330775

12 Abstract of the Disclosure The wear life of a high-speed tool steel cutting bit is increased by (a) cleansing the bit by subjection to an ion beam; (b) while preventing the temperature of the cleansed bit from rising above 350°C, coating the cleansed bit by condensing sputtered atoms of titanium and boron thereonto, the condensation being carried out to provide a coating thickness of 2-6 microns. An argon or krypton beam of ions is accelerated to 1300-1800 volts as a broad-beam ion source to sputter a titanium diboride target arranged as a cathode. The sputtering is carried out for 5-10 minutes while the bit is heated to about 200°C and a soft vacuum of about 4-6 milli-torr is used during the process.

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