EP 0105835 B1 19871223 - METHOD OF PRODUCING A HARD LAYER ON ARTICLES OF TI OR TI-ALLOYS
Title (en)
METHOD OF PRODUCING A HARD LAYER ON ARTICLES OF TI OR TI-ALLOYS
Publication
Application
Priority
CH 531382 A 19820907
Abstract (en)
[origin: US4511411A] A component of titanium or alloys thereof is placed in an autoclave. Nitrogen gas or ammonia is pumped into the autoclave. The chemically untreated component is exposed in the autoclave for three hours to a pressure of 900 bar and a temperature of 1000 DEG C. The TiN layer thus formed in the surface- and subsurface-zone of the component has a Vickers hardness of 800 0.05 g/sq.mm. with a thickness of 20 microns. With this economical method, an increase in surface hardness from Vickers hardness 0.05=450 with prior art methods to Vickers hardness 0.05=800 is achieved.
IPC 1-7
IPC 8 full level
C23C 8/24 (2006.01); C23C 16/34 (2006.01); C23C 28/00 (2006.01)
CPC (source: EP US)
C23C 8/24 (2013.01 - EP US); C23C 28/044 (2013.01 - EP US); C23C 28/048 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE DE FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0105835 A1 19840418; EP 0105835 B1 19871223; AT E31559 T1 19880115; CA 1214364 A 19861125; CH 650532 A5 19850731; DE 3375027 D1 19880204; IL 69633 A0 19831230; IL 69633 A 19870227; JP S59140372 A 19840811; US 4511411 A 19850416
DOCDB simple family (application)
EP 83810395 A 19830831; AT 83810395 T 19830831; CA 436180 A 19830907; CH 531382 A 19820907; DE 3375027 T 19830831; IL 6963383 A 19830902; JP 16338683 A 19830907; US 52895483 A 19830902