Method of forming a hard surface layer on a metal component
Patent
·
OSTI ID:5229983
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/sup 0/ C. The TiN layer thus formed in the surface- and subsurface-zone of the component has a Vickers hardness of 800 /sub 0.05/ /sub g/sq.mm./ with a thickness of 20 microns. With this economical method, an increase in surface hardness from Vickers hardness /sub 0.05/ =450 with prior art methods to Vickers hardness /sub 0.05/ =800 is achieved.
- Assignee:
- Vereinigte Drahtwerke AG (Switzerland)
- Patent Number(s):
- US 4511411
- OSTI ID:
- 5229983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
AMMONIA
AUTOCLAVES
ELEMENTS
HARD FACING
HARDNESS
HYDRIDES
HYDROGEN COMPOUNDS
MECHANICAL PROPERTIES
METALS
NITRIDES
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
PNICTIDES
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TITANIUM
TITANIUM ALLOYS
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
VICKERS HARDNESS
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
ALLOYS
AMMONIA
AUTOCLAVES
ELEMENTS
HARD FACING
HARDNESS
HYDRIDES
HYDROGEN COMPOUNDS
MECHANICAL PROPERTIES
METALS
NITRIDES
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
PNICTIDES
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TIME DEPENDENCE
TITANIUM
TITANIUM ALLOYS
TITANIUM COMPOUNDS
TITANIUM NITRIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
VERY HIGH TEMPERATURE
VICKERS HARDNESS