Sumitomo Metal Industries, Inc.

Yoshiaki Kusaba

Chihiro Hayashi

Hideo Yamamoto

Tsuneo Yamada

Shigeki Azuma

Masaru Izawa

Hiroyuki Matoba

Hideaki Miyuki

Kenji Tsubouchi

Rolling apparatus for producing angle from steel strip and method of

Hot rolling method of steel products and hot rolling roll for steel

A method for improving the resistance to surface roughening of tungsten-containing metallic articles such as cutting tools and hot mill rolls made of a cemented carbide or high-speed steel and extending the lifetime thereof. The method comprises treating a metallic article with an aqueous alkaline solution containing calcium ions and optionally tungstate ions having a pH greater than 8 so as to form a coating of calcium tungstate on the surface of the metallic article. In hot rolling with tungsten-containing rolls, the aqueous solution can be used as at least part of a cooling water to cool the rolls, thereby extending the period before roll replacement becomes necessary due to surface roughening and decreasing the frequency of roll dressing required during hot rolling.

Method for minimizing surface roughening of tungsten-containing rolls

A method and apparatus for rolling parallel-flange steel shapes under hot conditions through reversing rolling in a universal mill group are disclosed. The mill group comprises a first universal mill, an edging mill, and a second universal mill. The web height of the steel shape is finished to a final target size by a final pass in the second universal mill, or the inner web length is finished to a final target size by reducing the web weight by a first pass in the first universal mill before carrying out the reversing rolling.

Method of rolling steel shapes and apparatus therefor

A rolling method for parallel-flange steel shapes is disclosed, which comprises the steps of:

Rolling method for parallel-flange steel shapes

A continuous rolling mill is constructed by arranging driven horizontal rolling mills and undriven vertical rolling mills alternately and determining the values of the thickness of the rolled material between adjacent stands, the interaxial distance between work rolls, and the diameter of the work roll to satisfy predetermined relationships.

Continuous rolling method and continuous rolling mill

A rough rolling process for forming a beam blank for a universal beam from a flat slab, comprises the steps of making a triangular slit of a predetermined apical angle in each of longitudinal side edges of said flat slab and gradually deepening said slit with the apical angle thereof fixed; and widening the slit after the depth of said slit has reached a predetermined value.

Method for producing beam blank for universal beam

A blank for a wide flange beam is produced by feeding a flat slab to a break-down mill in which a box caliber, one or more forming calibers and a sizing caliber are formed by a pair of rolls, and rolling the material in a former stage of the rolling process so that the rectangular ratio of the rolled material is substantially equal to the rectangular ratio of the slab.

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Kobe, Japan

Yoshiaki Kusaba