초록 ▼

A metallic alloy composition is manufactured into products such as press formed or stamped products or rolled products such as sheet, strip, rod, wire or band by one or more cold working steps with intermediate or final flash annealing. The method can include cold rolling an iron, nickel or titanium

A metallic alloy composition is manufactured into products such as press formed or stamped products or rolled products such as sheet, strip, rod, wire or band by one or more cold working steps with intermediate or final flash annealing. The method can include cold rolling an iron, nickel or titanium aluminide alloy and annealing the cold worked product in a furnace by infrared heating. The flash annealing is preferably carried out by rapidly heating the cold worked product to an elevated temperature for less than one minute. The flash annealing is effective to reduce surface hardness of the cold worked product sufficiently to allow further cold working. The product to be cold worked can be prepared by casting the alloy or by a powder metallurgical technique such as tape casting a mixture of metal powder and a binder, roll compacting a mixture of the powder and a binder or plasma spraying the powder onto a substrate. In the case of tape casting or roll compaction, the initial powder product can be heated to a temperature sufficient to remove volatile components. The method can be used to form a cold rolled sheet which is formed into an electrical resistance heating element capable of heating to 900.degree. C. in less than 1 second when a voltage up to 10 volts and up to 6 amps is passed through the heating element.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of manufacturing a sheet from an intermetallic alloy composition, comprising steps of:(a) preparing a sheet from a powder having an intermetallic alloy composition;(b) heat treating the sheet by passing the sheet through a furnace such that the sheet is flash a

[ What is claimed is:] [1.]1. A method of manufacturing a sheet from an intermetallic alloy composition, comprising steps of:(a) preparing a sheet from a powder having an intermetallic alloy composition;(b) heat treating the sheet by passing the sheet through a furnace such that the sheet is flash annealed for less than one minute; and(c) rolling the sheet to final thickness.