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Title: Surface hardening of titanium alloys with melting depth controlled by heat sink

A process for forming a hard surface coating on titanium alloys includes providing a piece of material containing titanium having at least a portion of one surface to be hardened. The piece having a portion of a surface to be hardened is contacted on the backside by a suitable heat sink such that the melting depth of said surface to be hardened may be controlled. A hardening material is then deposited as a slurry. Alternate methods of deposition include flame, arc, or plasma spraying, electrodeposition, vapor deposition, or any other deposition method known by those skilled in the art. The surface to be hardened is then selectively melted to the desired depth, dependent on the desired coating thickness, such that a molten pool is formed of the piece surface and the deposited hardening material. Upon cooling a hardened surface is formed.
Inventors:
 [1];  [1]
  1. (Albany, OR)
Issue Date:
OSTI Identifier:
870092
Assignee:
United States of America as represented by Secretary of (Washington, DC) NETL
Patent Number(s):
US 5455079
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
Country of Publication:
United States
Language:
English
Subject:
surface; hardening; titanium; alloys; melting; depth; controlled; heat; sink; process; forming; hard; coating; providing; piece; material; containing; portion; hardened; contacted; backside; suitable; deposited; slurry; alternate; methods; deposition; flame; plasma; spraying; electrodeposition; vapor; method; skilled; selectively; melted; desired; dependent; thickness; molten; pool; formed; cooling; surface coating; titanium alloy; deposition method; plasma spray; heat sink; vapor deposition; plasma spraying; material containing; titanium alloys; molten pool; suitable heat; desired depth; coating thickness; melting depth; containing titanium; hard surface; /427/148/205/228/