Kawasaki Steel Corporation

Takashi Kusaba

Takashi Ehiro

Hideo Abe

Akira Torao

Kusuo Furukawa

Hiroaki Sasaki

Teruyuki Nakanishi

Teruaki Tanaka

Tadaaki Yanazawa

Takayuki Yanagimoto

Hiroshi Okumura

Toshiyuki Akune

Masashi Yamashita

Shinzo Saito

A work roll has a regularly and geometrically patterned uneven dulled section on the roll surface. Eavh uneven dulled section is composed of a crest and concavity and is of crater-like configuration. In order to obtain good performance in temper rolling, the crest is in a form of an annular ring extending around the edge of the concavity. According to the invention, pattern of arrangement of the uneven dulled sections is determined in relation to the diameter of the ring-shaped crests of the uneven dulled section so as to obtain optimum performance in producing good quality, exhibiting substantially high image clarify as coated by paint, enamel or so forth.

Work roll with dulled surface having geometrically patterned uneven

A method of rolling raw materials inclusive of slabs for the manufacture of beam blanks, and a roll to be used therefor, are disclosed. This method includes the steps of (a) subjecting a raw material, whose section consists of a web portion and a flange portion(s) having a width wider than the thickness of the web portion, to such a partial rolling that the web portion is partially rolled at regions inclusive of at least the joints of the flange portion(s), except the remaining central region, among a plurality of regions divided in the widthwise direction of the web portion, and (b) subjecting only the remaining central regions to a rolling. In the practice of this method, there is used a roll consisting of a single cylindrical drum including a first segment and a second segment arranged side by side to each other; the first segment having at least one relief of circumferential grooves facing the web portion; a plurality of rolling collars separated apart from each other through the relief in the axial direction, and serving for the partial rolling of the web portion, and a circumferential groove(s) dividing a side of the rolling collar for the web portion near the joint and enclosing the flange portion; and the second segment having a pair of reliefs each composed of a wider circumferential groove facing the flange portion, and a rolling drum extending between the reliefs and serving for the rolling of only the remaining central region of the web portion.

Method of rolling slabs for the manufacture of beam blanks and a roll to

A method of forming a beam blank, wherein:

Method of forming beam blank

Growing community of inventors

Okayama, Japan

Takashi Kusaba