Isothermal forging of nickel-base superalloys in air

A superalloy made of a forging nickel-base superalloy such as Rene TM 88DT or ME3 is forged in a forging press (40) having forging dies (52, 54) made of a die nickel-base superalloy. The forging is accomplished by heating a superalloy workpiece (56) to a forging temperature of from about 1700 DEG F...

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Bibliographische Detailangaben
Hauptverfasser:	RAYMOND, EDWARD LEE, SRIVATSA, SHESH KRISHNA
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS FORGE FURNACES FORGING HAMMERING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PRESSING METAL PUNCHING METAL RIVETING TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A superalloy made of a forging nickel-base superalloy such as Rene TM 88DT or ME3 is forged in a forging press (40) having forging dies (52, 54) made of a die nickel-base superalloy. The forging is accomplished by heating a superalloy workpiece (56) to a forging temperature of from about 1700 DEG F to about 1850 DEG F, and forging at that forging temperature and at a nominal strain rate. The die nickel-base superalloy is selected to have a creep strength of not less than a flow stress of the forging nickel-base superalloy at the forging temperature and strain rate.