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Method for producing variational format/constant format ultra-thin hot-rolled strip steel by using semi-headless technique

A hot-rolled strip, semi-endless technology, applied in the field of rolling ultra-thin hot-rolled strip, can solve the unmentioned problems, achieve increased productivity, reduce the number of tail throwing and strip threading, improve stability and The effect of yield

Inactive Publication Date: 2008-10-29
湖南华菱涟源钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Application No. 200710130823.6 "A Method for Thin Slab Continuous Casting to Produce Thin Strip Steel Coil" (its publication number is CN101108394A) discloses only a method of adopting reasonable process layout and precise process parameters in the CSP production line to control the production thickness of 1.2~ 1.5mm, low carbon steel, low alloy steel and IF steel thin strip and coil with a width of 900-1300mm, the production process of thinner specification products is not mentioned

Method used

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  • Method for producing variational format/constant format ultra-thin hot-rolled strip steel by using semi-headless technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: multiple batches of variable specification rolling

[0028] Adopt all three semi-endless variable-size rolling modes, that is, one semi-endless long billet is cut into three finished rolls, the thickness of the finished roll 1 is different from the thickness of the finished roll 2 and the finished roll 3, and the thickness sequence of each finished roll It is 1.8mm~1.6mm~1.6mm, and the width of the finished roll is 1229~1231mm.

[0029] Pour the molten iron from the blast furnace into a 100t oxygen top-bottom compound blowing converter and add scrap steel into the converter for conventional smelting. The molten steel is sent to the LF furnace for refining, and the refined molten steel is sent to the first continuous casting machine 1 and the second continuous casting machine 2 for completion The casting work of refined molten steel becomes continuous casting slab (ie slab). Electromagnetic Vibration Mold Control (EMBR) technology is used to ensure the qua...

Embodiment 2

[0039] Embodiment 2: Multiple batches of constant specification rolling

[0040] All three semi-endless constant specification rolling modes are adopted, that is, one semi-endless long billet is cut into three finished coils, the thickness specifications of each finished coil are in the order of 1.4mm~1.4mm~1.4mm, and the width of the finished coil is 1259~ 1261mm. This semi-endless constant-gauge rolling mode can also be used to roll constant-gauge hot-rolled strip steel with a thickness of 1.2mm, 1.6mm, or 1.8mm, and the width can be controlled within the range of 900-1600mm.

[0041] Pour the molten iron from the blast furnace into a 100t oxygen top-bottom compound blowing converter and add scrap steel into the converter for conventional smelting. The molten steel is sent to the LF furnace for refining, and the refined molten steel is sent to the first continuous casting machine 1 and the second continuous casting machine 2 for completion The casting work of refining molten ...

Embodiment 3

[0047] Embodiment 3: multiple batches of variable specification rolling

[0048] All four semi-endless variable specification rolling modes are adopted, that is, one semi-endless long billet is cut into four finished coils, and the thickness specifications of each finished coil are in the order of 1.3mm~1.2mm~1.0mm~1.0mm, and each finished coil The width is between 1259-1263mm (the width can also be controlled within the range of 900-1600mm), and the thickness distribution is: finished roll 1 is 1.3mm, finished roll 2 is 1.2mm, finished roll 3 is 1.0mm, and finished roll 4 is 1.0 mm.

[0049] Pour the molten iron from the blast furnace into a 100t oxygen top-bottom compound blowing converter and add scrap steel into the converter for conventional smelting. The molten steel from the furnace is sent to the LF furnace for refining. The refined molten steel is completed by the first continuous casting machine 1 and the second continuous casting machine 2 The casting work of refin...

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Abstract

The invention discloses a method for producing ultra-thin hot rolling strip steel with variable / constant specification by adopting a semi-endless technology; qualified molten steel after refining is sent to a first continuous caster and a second continuous caster to be cast into a flat blank; the semi-endless flat blank cast by the first continuous caster enters a first roller-hearth type soaking furnace for being heated at the temperature of 1050-1150 DEG C, which is sent to a high pressure water descaler at a rolling mill area for the removal of iron scale on the surface of the flat blank and is rolled into the ultra-thin hot rolling strip steel with the thickness being 0.8-1.8mm and the width being 1229-1265mm by F1-F7 rolling mills of a fine continuous rolling mill group; the hot rolling strip steel within the final rolling temperature rang of 860 DEG C to 880 DEG C enters a laminar flow cooler for cooling and is quickly cut by a high-speed flying shear according to the weight of each steel coil; the cut strip steel is alternately coiled by a first coiling machine or a second coiling machine into a finished coil with three or four variable / constant specifications. The ultra-thin hot rolling strip steel produced by the method can expand the products of the strip steel, stabilize rolling condition, lower abrasion of rollers, reduce the times of band penetration and whipping, decrease the loss of waste head and crop end of the products and enhance the yield of the products and productivity.

Description

technical field [0001] The invention relates to a method for rolling ultra-thin hot-rolled strip steel, in particular to a method for producing three-coil and four-coil products with variable specifications or constant specifications using semi-endless technology in the continuous casting and rolling (CSP) process of thin plates. Methods such as ultra-thin hot-rolled strip steel. Background technique [0002] With the development of thin slab continuous casting and rolling production line production technology, the product configuration combination and product quality of short-process production lines have been further improved, especially the thin slab continuous casting and rolling technology (ie CSP technology) with the second generation of continuous casting and rolling With the further development of the construction of the production line, the advanced thin-gauge rolling technology has been perfected and applied, and the steel types and product specifications of the ho...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B37/74B21B37/16B21B37/58
Inventor 刘旭辉周明伟吴浩鸿李丹李晓少钟新建张南风
Owner 湖南华菱涟源钢铁有限公司
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