Metal treatment – Process of modifying or maintaining internal physical... – Heating or cooling of solid metal
Patent
1991-06-26
1993-03-02
Roy, Upendra
Metal treatment
Process of modifying or maintaining internal physical...
Heating or cooling of solid metal
148670, 420418, C22C 1400
Patent
active
051906031
ABSTRACT:
A process for producing a workpiece from an alloy containing dopant and based on titanium aluminide. The process is intended to produce a workpiece of high oxidation and corrosion resistance, good high-temperature strength and adequate ductility. The process steps include melting the alloy, casting the melt to produce a cast body, cooling the cast body to room temperature and removing its casting skin and its scale layer. The descaled cast body is subjected to high-temperature isostatic pressing at a temperature between 1200.degree. and 1300.degree. C. and a pressure between 100 and 150 MPa, and cooling the isostatically pressed cast body. The cooled cast body is heated to temperatures of 1050.degree. to 1200.degree. C., deformed isothermally one or more times at this temperature for the purpose of molding and structure improvement, and cooled to room temperature. The deformed cast body is machined to produce a workpiece by material removal.
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Nazmy Mohamed
Staubli Markus
Asea Brown Boveri Ltd.
Roy Upendra
LandOfFree
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