Fujico Co., Ltd.

Akio Sonoda

Hideaki Nagayoshi

Kenji Kimura

Hiroshi Yoshinaga

Hyo-Gyoung Kang

Hiroaki Furuta

Hiroyuki Miyazaki

[PROBLEM] The invention provides a roll for hot rolling process having various types of more excellent durability performances than conventional rolls, and provides also a method for manufacturing the same. [SOLUTION] A cladding layeris formed on an outer circumference portion of a roll for hot rolling process, where the cladding layercomprises: 0.5 to 0.7% by mass of C, 2.8 to 4.0% by mass of Si, 0.9 to 1.1% by mass of Cu, 1.4 to 1.6% by mass of Mn, 2.7 to 3.3% by mass of Ni, 13.5 to 14.5% by mass of Cr, 0.8 to 1.1% by mass of Mo, 0.9 to 1.1% by mass of Co, and 0.2 to 0.4% by mass of Nb, with a balance being Fe and inevitable impurities, and has a thickness of 5 mm or more.

Roll for hot rolling process and method for manufacturing same

A method for manufacturing a mill roll including a preheating process for joining end portionstoof a roll barrel memberand/or shaft materials, and a friction pressure welding process strongly pressing and joining the shaft materialsto a core materialafter frictionally heating the joining end portionstoby rotating the shaft materialswhile pressing to the core material, and a manufacturing apparatus including first and second holding meansfor the roll barrel memberand the shaft materials, a rotating means rotating the shaft materials, a pressing meanspressing the core materialand the shaft materialsin an axial direction, and a preheating meanspreheating the joining end portionstoof the roll barrel memberand the shaft materials

Method for manufacturing mill roll, mill roll and manufacturing apparatus of mill roll

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Kitakyushu, Japan

Akio Sonoda