WARM WORKING METHOD FOR STAINLESS STEEL FOIL AND MOLD FOR WARM WORKING

摘要

An austenitic stainless steel foil 2 with a thickness equal to or less than 300 μm is disposed to face a punch 12, and the stainless steel foil 2 is subjected to drawing in a state in which an annular region 2a of the stainless steel foil 2 that is in contact with a shoulder portion 12d of the punch 12 is set to a temperature up to 30° C. and an external region 2b outside the annular region 2a is set to a temperature of from 40° C. to 100° C.

主权项

1. A mold for warm working a stainless steel foil,
the mold comprising: a punch; a blank holder disposed at an outer circumferential position of the punch; and a die disposed to face the blank holder, and where the mold serving to subject an austenitic stainless steel foil with a thickness equal to or less than 300 μm to drawing by pressing the stainless steel foil together with the punch inward of the die in a state in which the stainless steel foil is interposed between the blank holder and the die, wherein the punch is provided with cooling means, the blank holder and the die are provided with heating means, and the stainless steel foil is subjected to drawing in a state in which an annular region of the stainless steel foil that is in contact with a shoulder portion of the punch is set to a temperature equal up to 30° C. and an external region outside the annular region interposed between the blank holder and the die is set to a temperature of from 40° C. to 100° C., wherein a thermally insulating member is provided at an inner circumferential portion of the blank holder facing the outer circumferential surface of the punch.