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A kind of finish rolling unit and rolling method in ESP endless rolling

A finishing mill and endless rolling technology, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of not being able to fully release production capacity, not having the function and strategy of online roll changing with dynamic rules, and achieving The comprehensive economic benefits of the enterprise are considerable, the production cycle is shortened, and the production cost is reduced.

Active Publication Date: 2020-03-10
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned technology realizes the cooling and cooling of the strip by adding cooling pipes in the F4-F5 stands of the finishing rolling group and adding a cooling channel in front of the finishing rolling group, and then performs ferrite rolling, but the finishing rolling groups are all 5 The rack finishing unit does not have the function and strategy of online roll change with dynamic schedule change. When the rolls of the finishing unit are worn and replaced, the roll replacement needs to be stopped. During the roll change process of the finishing unit, the upstream continuous casting cannot be carried out. , which limits the play of ESP endless rolling technology and cannot fully release the production capacity. Moreover, in the process of conventional austenitic rolling, it is impossible to freely switch ferrite rolling according to the change of regulations. Therefore, there is an urgent need for an ESP endless rolling The finishing rolling unit and rolling method in the process realize continuous non-stop production, and can realize customized production according to needs

Method used

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  • A kind of finish rolling unit and rolling method in ESP endless rolling
  • A kind of finish rolling unit and rolling method in ESP endless rolling
  • A kind of finish rolling unit and rolling method in ESP endless rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like image 3 As shown, in the present invention, when F1 is the standby finishing mill, and F3 is the worn finishing mill, the strip blank at 1500°C after continuous casting, the outlet temperature of the third stand of the rough rolling group is 930°C, and the temperature is 950°C after induction heating. ℃, the microstructure of the billet is austenite, and it is in the austenite zone before entering the finishing rolling unit. After being rolled by the finish rolling mill, the temperature of the last stand of the strip billet is 730°C after passing through the finish rolling mill, and the temperature drops to 610°C after laminar flow cooling.

[0047] When the rolls of the F3 frame need to be replaced, the dynamic variable regulation downstream adjustment strategy is adopted. At this time, the injection header in front of the F1 frame starts to spray cooling water to the strip, and the injection header in front of the F1 frame sprays the strip. After the cooling wa...

Embodiment 2

[0049] like image 3 As shown, in the present invention, when F1 is the standby finishing mill, and F3 is the worn finishing mill, the strip billet at 1500°C after continuous casting passes through the third stand of the rough rolling mill. ℃, the microstructure of the billet is austenite, and it is in the austenite zone before entering the finishing rolling unit. After being rolled by the finish rolling mill, the temperature of the last stand of the final strip is 750°C in the finish rolling mill, and the temperature drops to 630°C in laminar flow cooling.

[0050] When the rolls of the F3 frame need to be replaced, the dynamic variable regulation downstream adjustment strategy is adopted. At this time, the injection header in front of the F1 frame starts to spray cooling water to the strip, and the injection header in front of the F1 frame sprays the strip. After the cooling water, the finish rolling unit starts to change rolls online. At this time, F3 is raised and F1 is p...

Embodiment 3

[0052] like image 3 As shown, in the present invention, when F1 is the standby finishing mill, and F3 is the worn finishing mill, the strip billet at 1500°C after continuous casting passes through the third stand of the rough rolling mill. ℃, the microstructure of the billet is austenite, and it is in the austenite zone before entering the finishing rolling unit. After being rolled by the finish rolling mill, the temperature of the last stand of the strip billet is 770°C after passing through the finish rolling mill, and the temperature drops to 650°C after laminar flow cooling.

[0053] When the rolls of the F3 frame need to be replaced, the dynamic variable regulation downstream adjustment strategy is adopted. At this time, the injection header in front of the F1 frame starts to spray cooling water to the strip, and the injection header in front of the F1 frame sprays the strip. After the cooling water, the finish rolling unit starts to change rolls online. At this time, F...

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Abstract

The invention discloses a finishing rolling unit in ESP endless rolling and a rolling method, and belongs to the field of steel and iron material engineering. The finishing rolling unit in the ESP endless rolling of the invention comprises a plurality of finishing mills arranged in the order of a finishing rolling process, and is characterized in that one of the finishing mills is a standby finishing mill for replacing the worn finishing mill; a spray header is arranged in front of the preceding finishing mill in the standby finishing mill and the worn finishing mill by the order; and the spray header spray cold water to cool a strip plate to complete the transformation process of austenite to ferrite. According to the invention, the full-continuous non-stop flexible rolling technology canbe realized, the productivity drop caused by the forced stop of the production line due to the downtime and roll change of the finishing rolling unit is avoided, and the output is also improved; andthe roll temperature rise can be reduced, so that the fatigue cracking and fracturing of the roll due to the thermal stress are reduced, the wear of the roll is reduced, the surface quality of endlessrolled products is improved, and the production cost is significantly lowered.

Description

technical field [0001] The invention belongs to the field of iron and steel material engineering, and relates to a ferrite rolling method, in particular to a finishing rolling unit in ESP endless rolling, and a ferrite rolling method based on ESP dynamic variable regulation. Background technique [0002] The iron and steel industry is an important industry of the country, among which metal plates and strips play a very important role in the national economy and national defense modernization. Thin Strip Continuous Casting and Rolling (TSCR) means that the molten steel is cast into a strip by a continuous casting machine, and is directly heated by a heater without being cooled to room temperature. Instead of the phase transformation of ferrite → ferrite → austenite, it always keeps rolling in the austenite area. It concentrates the most advanced smelting, continuous casting and continuous rolling technologies in the contemporary era, and is known as the successor to oxygen fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B45/02B21B1/46B21B37/74
CPCB21B1/46B21B37/74B21B45/0218
Inventor 彭艳刘才溢王双檑崔金星
Owner YANSHAN UNIV
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