Manufacturing method of Fe-Ni alloy thin plate and Fe-Ni alloy thin plate

摘要

It provides an Fe-Ni-based alloy thin plate capable of having isotropic mechanical properties even if the width is increased, and a method of manufacturing the same. By mass% Ni+Co: 35.0 to 43.0% (however, Co is 0 to 6.0%), Si: 0.5% or less, Mn: 1.0% or less, the balance is made of Fe and impurities, and a hot-rolled material having a thickness of 2 mm or more Using as a cold rolling material, performing the first cold rolling with a reduction ratio of 85% or more with respect to the cold rolling material, and after the first cold rolling, a temperature of 800°C or more, and a holding time of 0.1 to 1.2 minutes Recrystallization annealing is performed at, and after the recrystallization annealing, final cold rolling with a reduction ratio of 40% or less is performed to obtain an Fe-Ni alloy thin plate having a thickness of 0.25 mm or less, and no heat treatment is performed after the final cold rolling. Method for producing a thin Fe-Ni alloy plate and a thin Fe-Ni alloy plate.