MANUFACTURING METHOD OF FE-NI BASED ALLOY STRIP

摘要

An objective of the present invention is to provide a manufacturing method of a material which greatly improves adhesion by roughening surface roughness of a thin Fe-Ni-based alloy sheet having a thickness of 0.25 mm or thinner. To achieve the objective, the manufacturing method of the Fe-Ni-based alloy sheet includes a cold rolling process of cold-rolling and continuously annealing a material for cold rolling comprising: 35-43 mass% of Ni and Co (0-6 mass% of Co); 0.5 mass% or lower of Si; 1.0 mass% or lower of Mn; and the remainder consisting of Fe and inevitable impurities at least once. Final cold finishing rolling is performed in conditions with a rolling roll roughness (Ra) of 0.15-1 μm; a rolling speed of 6.5 m/s or lower; a kinematic viscosity of rolling oil of 8 mm^2/s or higher; and a rolling oil discharge amount of 35 L/s or lower during the cold rolling process to obtain the Fe-Ni-based alloy sheet having a thickness of 0.25 mm or thinner.