Kawasaki Steel Corporation

Takeo Ohnishi

Yuji Shimoyama

Fumiya Yanagishima

Hideo Sunami

Yukio Ida

Tsuneyoshi Wakui

Toshio Akizuki

Goji Katsushima

Hideo Kuguminato

Takeo Fukushima

Hironobu Ohno

Tadaaki Yasumi

Fumio Kosumi

Munetoshi Suzuki

An uneven patterned metal strip or plate is formed with an uneven pattern as a surface decorative pattern. The pattern is constituted of one or more pattern unit containing a plurality of uneven dot. Each of the uneven dots has a size D. The uneven dots are arranged in a predetermined density to have given ratio .eta. of occupying area versus plane area in said pattern unit. The size D and area ratio .eta. being in a range of:

Patterned metal plate and production thereof

A steel sheet for DI can having improved DI workability and resistance to die abrasion has such a surface profile that a center-line average surface roughness is within a range of 0.1.about.4.0 .mu.m and a microscopic shape is comprised of mountain portions, groove-like valley portions and middle flat portions satisfying particular dimension relations.

Steel sheets for drawing and ironing worked cans

A steel strip continuous annealing apparatus comprising: a steel strip feeder; a heating-soaking zone for heating and soaking a steel strip at a predetermined temperature; a first cooling zone for rapidly cooling the steel strip at a predetermined cooling rate; a second cooling zone for slowly cooling the steel strip or holding same at a predetermined temperature; a third cooling zone for cooling the steel strip to substantially room temperature; and a steel strip carryout device; wherein the first cooling zone incorporates therein forcible cooling means, the second cooling zone incorporates therein hot-cold change-over means and the third cooling zone incorporates therein forcible cooling means, while said steel strip continuous annealing apparatus further comprises: means for directly bypassing the steel strip from the heating-soaking zone through a first bypass passageway to the second cooling zone; and means for directly bypassing the steel strip from the first cooling zone through a second bypass passageway to the steel strip carry-out device; so that the steel strips different in dimensions and required heat cycle can be efficiently annealed.

Steel strip continuous annealing apparatus

A steel strip continuous annealing apparatus comprising: a steel strip feeder; a heating-soaking zone for heating and soaking the steel strip at a predetermined temperature; a first cooling zone for rapidly cooling the steel strip at a predetermined cooling rate; a second cooling zone for slowly cooling the steel strip or holding same at a predetermined temperature; a third cooling zone for cooling the steel strip to substantially the room temperature; and a steel strip carry-out device; wherein the first cooling zone incorporates therein forcible cooling means, the second cooling zone incorporates therein hot-cold change-over means and said forcible cooling means incorporated in the first cooling zone is provided thereon with self-cooling means; so that steel strips of various grades of steel different in required heat cycle to be applied thereto can be efficiently and stably annealed.

Growing community of inventors

Chiba, Japan

Takeo Ohnishi