Patent ID: 6348111
Filing Date: 2002-02-19
Classification: C21D

Abstract:
A method for producing an Feâ€”Ni alloy comprising the steps of:melting an Feâ€”Ni alloy, which consists essentially of, by weight percentage, from 30 to 55% of Ni, not more than 0.8% of Mn, from 0.001 to 0.050% of S, from 0.005 to less than 0.5% of at least one element selected from the group consisting of Ti, Mg, Ce and Ca, the balance being Fe and unavoidable impurities, and in which the product of the total content of said Ti, Mg, Ce and Ca and the content of S is limited to a range of from 0.00005 to 0.010; casting the melted alloy; heating the alloy prior to a hot-working at a temperature (T) under the following equation: 1050&lE;T(Â° C.)&lE;{19500/[8.5âˆ’log[%X][%S]]}âˆ’350, â€ƒin which the S content is denoted by [%S], and the content of the total amount of Ti, Mg, Ce and Ca is denoted by [%X], hot-working the heated Feâ€”Ni alloy; cold-rolling; and annealing.