Kawasaki Steel Corporation

Hironobu Ohno

Yuji Shimoyama

Yasuhiro Yamaguchi

Tateo Ohnishi

Hideo Kuguminato

Fumiya Yanagishima

Takeo Ohnishi

Hisao Yasunaga

Tadaaki Yasumi

Toshio Akizuki

Isamu Shioda

Tsuneyoshi Wakui

Fumio Kosumi

Satoshi Kasai

Tteo Ohnishi

Yoji Nakazono

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

An improved layout of the hearth rolls in an annealing furnace comprises a plurality of ceramic coated rolls and a plated rolls. The ceramic coated rolls are arranged in a region in the annealing furnace, where the temperature is higher than 450.degree. C. On the other hand, the plated rolls are arranged in a region where the temperature is lower than or equal to 450.degree. C. The hearth roll is provided a wear resistant coating of chrome plate or sprayed on ceramic of a thickness greater than or equal to 1 .mu.m and less than or equal to 100 .mu.m. In addition, according to the invention, the hearth roll is provided a surface roughness Ra in the range of 4.5 .mu.m to 20 .mu.m.

Apparatus for continuously annealing metal strip and hearth roll therefor

An annealing operation is performed with controlling tension force to be exerted on a metal strip depending upon thermal crown of hearth rolls. The thermal crown magnitude is assumed based on various factors influencing for the magnitude of the effective crown.

Method and system for controlling tension to be exerted on metal strip

A method for leveling a metal strip performs a leveling operation by opening leveling rolls at a predetermined position relative to a welded joint and closing at a predetermined position relative to the welded joint. The tension exerted on the metal strip while the leveling rolls are held open is set at a given value in relation to the metal strip length where the leveling rolls are held open. The tension to be exerted on the metal strip while leveling is selected so that the tension may cause a given rate of elongation on the metal strip and thereby levels the metal strip. The leveling device is applicable for implementing the leveling process including a quick open and a quick close upon encountering welded joints of the strips. The leveling device includes features in that the leveling rolls as held open and thus released from the metal strip and self-propelled to rotate.

Method and device for leveling metal strip to be fed into continuous

Growing community of inventors

Chiba, Japan

Hironobu Ohno