Arcelor France

Nippon Steel Corporation

Nippon Steel Sumitomo Metal Corporation

Arcelormittal

Arcelormittal France

Guy Hauret

Shigeru Ogawa

Toshiyuki Shiraishi

Yoshiki Takahama

Luc Vanel

Maxime Laugier

Pascal Masson

Tsuyoshi Inoue

Yoshiki Nippon Steel Corporation Takahama

Shigeru Nippon Steel Corporation Ogawa

Toshiyuki Nippon Steel Corporation Shiraishi

Shigeru c/o Nippon Steel Corporation Ogawa

Yoshiki c/o Nippon Steel Corporation Takahama

Toshiyuki c/o Nippon Steel Corporation Shiraishi

The present invention provides a method for supplying lubricant to various kinds of steel sheets with different qualities in cold rolling without any restrictions, such as lubricant supplying apparatus or lubrication conditions. This method comprises storing two or more kinds of lubricant such as A and B, having different compositions, selecting one lubricant or a mixture lubricant of the above A and B in accordance with the friction coefficient between the steel sheet to be cold rolled and a work-rolls, and supplying an emulsion comprising a mixture of the lubricant A and/or B and heated water.

Method of supplying lubrication oil in cold rolling

The invention relates to a method for feeding lubricant during hot rolling, in which the surfaces of the rolling rolls are fed with a lubricating emulsion, characterized in that said lubricating emulsion, consisting of a lubricating oil having a viscosity between 10 cSt and 400 cSt at 40&#xb0; C., mixed with water, is directed onto the surfaces of the rolling rolls via at least one lubricant feed nozzle, at a temperature above 0&#xb0; C. but below 25&#xb0; C.

Method for feeding lubricant during a hot rolling process

A method of supplying lubricating oil in cold-rolling by emulsion lubrication, characterized by comprising:

Method of supplying lubricating oil in cold-rolling

The present invention provides a method of supplying lubrication oil in cold rolling for stable rolling without heat scratches or slip and achieving high productivity and improvement of the unit consumption of lubrication oil, that is, a method of supplying lubrication oil in cold rolling by supplying a predetermined kind of emulsion lubrication oil comprised of a mixture of rolling oil and water at the rolling stand inlet from nozzles, the method characterized by measuring or estimating the pressure in the lubrication nozzle pipe (lubrication nozzle pressure), controlling the lubrication nozzle pressure of the rolling stand where lubrication is susceptible to become excessive with the predetermined emulsion lubrication oil to 0.5 MPa or more, and, while doing so, supplying the lubrication oil to the roll bite inlet of the stand by direct injection.

Growing community of inventors

Fos-sur-Mer, France

Guy Hauret