Metal treatment – Process of modifying or maintaining internal physical... – Chemical-heat removing or burning of metal
Patent
1983-03-08
1985-03-19
Skiff, Peter K.
Metal treatment
Process of modifying or maintaining internal physical...
Chemical-heat removing or burning of metal
148421, C22F 118
Patent
active
045057648
ABSTRACT:
The microstructure of titanium is refined by inducing a high temperature transformation from .alpha.+.beta. to .beta. and back to .alpha.+.beta. by diffusing hydrogen into and then out of the metal while maintaining the metal above the temperature of hydride formation. The titanium is heated to a temperature just below the .alpha.+.beta. to .beta. transformation temperature, and hydrogen is diffused into the metal thereby inducing the phase change. The hydrogen is diffused out of the metal again inducing a phase change. When the hydrogen has been removed, the metal is allowed to cool to room temperature.
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Dardi Louis E.
Smickley Robert J.
Howmet Turbine Components Corporation
Skiff Peter K.
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