PRODUCTION EQUIPMENT LINE FOR HOT-ROLLED STEEL STRIPS AND PRODUCTION METHOD FOR HOT-ROLLED STEEL STRIP

Title:

PRODUCTION EQUIPMENT LINE FOR HOT-ROLLED STEEL STRIPS AND PRODUCTION METHOD FOR HOT-ROLLED STEEL STRIP

Document Type and Number:

WIPO Patent Application WO/2017/130765

Kind Code:

A1

Abstract:

A production equipment line for hot-rolled steel strips, the production equipment line comprising: a roughing mill group 3 that comprises a plurality of roughing mills 31, 32 that hot roll a rolling material 10 that has been heated to a prescribed temperature to a finish rolling starting sheet thickness; and a finishing mill group 6 that comprises a plurality of finishing mills that perform a controlled roll of the rolling material 10 to a finished sheet thickness. At least one of the plurality of roughing mills is a reversible rolling mill 31. On the upstream or downstream side of the reversible rolling mill 31, the production equipment line for hot-rolled steel strips comprises a slow cooling device 42 that slow cools the rolling material at a water volume density of less than 1000 L/min∙m2 and a quenching device 41 that that is arranged next to the slow cooling device 42 in the rolling direction and that quenches the slow-cooled rolling material 10 at a water volume density of 1000 L/min∙m2 or higher.

Inventors:

UEOKA SATOSHI (JP)
TAMURA YUTA (JP)
SHIRASAKI SONOMI (JP)
KATAYAMA YUKAKO (JP)
MATSUMOTO TAKASHI (JP)

Application Number:

PCT/JP2017/001181

Publication Date:

August 03, 2017

Filing Date:

January 16, 2017

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21B45/02; B21B1/26

Domestic Patent References:

WO2008108483A1

2008-09-12

Foreign References:

JP2015217411A	2015-12-07
JP2008246579A	2008-10-16
JP2011143459A	2011-07-28
JP4720250B2	2011-07-13
JPH04274814A	1992-09-30
JPS4946516B1	1974-12-10

Other References: