METAL PLATE EXCELLENT IN PRESS FORMABILITY

Japanese Patent JP2004276064

A

To provide a metal plate in which cracking and galling are restrained from occurring at the time of press forming, for which little change of a plate pressing pressure is required in press forming, and which has excellent press formability.

The metal plate excellent in formability has independent recesses of 100-4,000 pieces/mm2 on the surface thereof. The area of the opening of each recess is ≥70 μm2 and ≤10,000 μm2. A mean depth of the surface except the recesses is ≥1 μm with respect to a filter waviness curve, and is ≤1/5 of the thickness of the plate.

JP6875824	Squeezing blank can
JPS617022	METHOD OF FORMING BOTTOMED CYLINDRICAL BODY MADE OF METAL
JPH0822479	INDUSTRIAL APPLICABILITY: A method for processing a small-process workpiece by a transfer press device.

YUASA KENSHO
SUGIBASHI ATSUSHI
MIYASAKA AKIHIRO

JP2003070319A

October 07, 2004

March 14, 2003

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NIPPON STEEL CORP

B21D22/20; B21D22/02; B21D31/00; B21D37/18; C23C2/02; C23C2/06; C23C2/26; (IPC1-7): B21D22/20; B21D22/02

Takashi Ishida
Jun Tsuruta
Hiroshi Kamematsu
Masaya Nishiyama

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