Hot strip rolling plant and method directly combined with continuous casting

A hot strip rolling method directly combined with continuous casting, comprising the steps of casting a high-temperature slab with a thickness not larger than 80 mm by a continuous casting machine, continuously rolling said slab into a bar with a thickness of 20 to 60 mm by a roughing mill including plural sets of roll assemblies incorporated in one housing and arranged to successively roll said slab, evenly heating said bar to the range of 1050.degree. to 1200.degree. C., and continuously rolling the heated bar into a strip with a thickness not larger than 15 mm by a finishing mill comprised of three or four stands of hot strip rolling mills each including work rolls with a diameter not larger than 500 mm.

A hot strip rolling method directly combined with continuous casting, comprising the steps of casting a high-temperature slab with a thickness not larger than 80 mm by a continuous casting machine, continuously rolling said slab into a bar with a thickness of 20 to 60 mm by a roughing mill, and continuously rolling said bar into a strip with a thickness not larger than 15 mm by a finishing mill comprised of three or four stands of hot strip rolling mills so that the rolling speed on the delivery side of the final stand of said finishing mill is not larger than 500 m/min.

A hot strip rolling method directly combined with continuous casting in which a slab cast by a continuous casting machine and having a thickness not larger than 80 mm is directly passed through a roughing mill and a finishing mill for hot rolling to produce a strip of a desired thickness, wherein:

• a rolling mill including two sets of roll assemblies incorporated in one housing and arranged to successively roll said slab is employed as said roughing mill for rough-rolling said slab into a bar and, thereafter, a rolling mill train of four or less stands each including small-diameter work rolls is employed as said finishing mill for finish-rolling said bar at a high reduction rate and at a low speed.

A hot strip rolling plant directly combined with continuous casting, comprising a roughing mill including plural sets of roll assemblies incorporated in one housing and arranged to successively roll a high-temperature slab cast by a continuous casting machine, and a finishing mill comprised of three or four stands of hot strip rolling mills each including work rolls with a diameter not larger than 500 mm,

• wherein said high-temperature slab cast by said continuous casting machine has a thickness not larger than 80 mm, is directly carried to said roughing mill and said finishing mill, and is successively rolled by said roughing mill and said finishing mill in a continuous manner into a strip with a thickness not larger than 15 mm.

A hot strip rolling plant directly combined with continuous casting, wherein:

• a continuous casting machine for continuously casting a high-temperature slab with a thickness not larger than 80 mm and a roughing mill of one stand including plural sets of roll assemblies incorporated in one housing and arranged to successively roll said slab cast by said continuous casting machine are disposed so that the distance from the installed position of said continuous casting machine to the middle position of said roughing mill is in the range of 10 to 15 m horizontally,
• a finishing mill comprised of three or four stands of 4-high or 6-high hot strip rolling mills each including work rolls with a diameter not larger than 500 mm, and arranged to successively roll a bar rolled by said roughing mill into a strip with a thickness not larger than 15 mm are disposed so that the distance from an inlet of the most upstream stand to an outlet of the final stand of said finishing mill is in the range of 10 to 15 m horizontally, and
• said continuous casting machine, said roughing mill, said finishing mill and a coiler disposed on the delivery side of the final stand of said finishing mill for coiling said strip are disposed so that the distance from said continuous casting machine to said coiler is not longer than 100 m horizontally.

A hot strip rolling plant directly combined with continuous casting in which a slab cast by a continuous casting machine and having a thickness not larger than 80 mm is directly passed through a roughing mill to produce a bar, and the bar is directly passed through a finishing mill for hot rolling to produce a strip of a desired thickness, wherein:

• a rolling mill including two sets of roll assemblies incorporated in one housing and arranged to successively roll said slab is installed as said roughing mill, and a rolling mill train of four or less stands each including small-diameter work rolls is installed as said finishing mill.