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Verschleissbestaendiger, mechanisch hochbelastbarer und reibungsarmer Randschichtaufbau fuer Titan oder seine Legierungen sowie Verfahren zu seiner Herstellung

Surface layer structure for titanium and alloys.
: Brenner, B.; Bonss, S.; Scheibe, H.; Ziegele, H.

Frontpage ()

DE 1997-19751337 A: 19971119
DE 1997-19751337 A: 19971119
EP 1998-965076 AW: 19981110
WO 1998-DE3367 A: 19981110
DE 19751337 A1: 19990527
EP 1032721 B1: 20020213
Patent, Elektronische Publikation
Fraunhofer IWS ()

NOVELTY - Surface layer structure for titanium and its alloys consists of a 200-400 nm thick hard amorphous carbon layer (4), a 5-50 nm thick intermediate layer (3) and a 0.3-2.0 nm thick laser gas alloyed layer (2) having a hardness of 600-1400 HV0.1. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included comprising melting the component surfaces to be protected with a high performance laser. The laser density p of the laser beam is 1 x 104 to 2 x 105 W/cm2. Melting is carried out at an oxygen partial pressure of less than 5 ppm. The reactive atmosphere consists of N2 and Ar, in which a relative nitrogen content of 40-80% is chosen. A degree of overlapping is expressed as: U = (a-c)/a (where a and c are track widths). The component is polished to a surface roughness of not more than 0.2 microns and purified in a high vacuum apparatus. The intermediate layer is applied by a vacuum arc process and the hard amorphous carbon layer also deposited by a vacuum arc process. USE - To pro tect oscillating human implants and for use in air and space travel. ADVANTAGE - The structure is highly wear resistant.