Production process of laminated-rolled wide sheet

A production process and thin plate technology, which is applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of high curvature and large plate protrusion of wide thin plates, and solve the problems of large fluctuations in welding depth, prevent processing deformation, The effect of improving quality

Active Publication Date: 2018-06-22
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the 5m rolling mill CVC technology limits the production of thin plates with a width of less than 6mm on the roll gap, and at the same time solves

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment provides a production process for stacked wide thin plates, which specifically includes the following steps:

[0033] Step 1: Select the billet, select the billet with hydrogen content of 2ppm to open the billet to 75mm, the blank board technology requires that the difference between the same board is 0.18mm, and when the measured length is 1m, its unevenness is 2.5mm, and then the billet board Fire cut to length;

[0034] Step 2: Mill the pre-determined slab, and control the milling depth and speed during the milling process. Specifically, the cutting depth of the milling depth is 2.5mm, the feed rate is 700mm / min, and the milling direction must be reciprocated along the same axis;

[0035] Step 3: Make a groove on the surface of the lower billet with a groove depth of 2mm, spray a release agent in the groove, bake the billet with a 200°C hot billet, and dry the release agent;

[0036] Step 4: Align and combine the baked lower blank and upper blank, an...

Embodiment 2

[0044] A kind of stack rolling wide sheet production process, specifically comprises the following steps:

[0045]Step 1: Select the billet, select the billet with hydrogen content of 2ppm to open the billet to 80mm, the blank board technology requires that the difference between the same board is 0.15mm, and when the measured length is 1m, its unevenness is 2mm, and then the billet board is fired Cut to length;

[0046] Step 2: Mill the pre-measured slab, and control the milling depth and speed during the milling process. Specifically, the cutting depth of the milling depth is 2.2mm, the feed rate is 740mm / min, and the milling direction must be reciprocated along the same axis;

[0047] Step 3: Make a groove on the surface of the blank, the groove depth is 1.5mm, and spray the release agent in the groove, bake the blank with 180°C, and dry the release agent;

[0048] Step 4: Align the baked lower billet with the upper billet, and weld the composite billet by submerged arc we...

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Abstract

The invention discloses a production process of a laminated-rolled wide sheet. The production process specifically comprises the following steps that (1) a blank is selected, the selected blank is bloomed to 70-75 mm, and then a bloomed sheet is subjected to flame cutting and sizing; (2) milling is carried out on the blank sheet subjected to primary sizing; (3) a groove is formed in the surface ofa lower blank, an isolating agent is sprayed in the groove, and the isolating agent is dried; (4) aligning and compounding are carried out on the dried lower blank and upper blank, and welding is carried out; (5) a blank boss is machined; (6) the blank sheet is placed in a stepping type heating furnace for heating; (7) descaling is carried out with high-pressure water; (8) broadening rolling is carried out by a 5000 mm rolling mill; (9) straightening is carried out; and (10) plasma cutting and sheet separating are carried out. According to the production process of the laminated-rolled wide sheet, limitation on a roll gap of a 5m rolling mill in producing wide sheets with the thickness of 6 mm or below by using the CVC technology can be solved, and meanwhile, the problems that a wide sheet with the thickness of 8 mm or below is high in curvature and large in plate projection degree are solved.

Description

technical field [0001] The invention relates to a production process of stack rolling wide thin plates. Background technique [0002] With the development of the steel market, downstream customers have increased demand for thin plates below 10mm. In order to better adapt to the situation of the steel industry, Nangang Wide and Heavy Plate Factory not only produces thick plates, but also develops wide and thin plates; at present, it has successfully developed 6mm wide thin plates, which exceeded the lower limit of the original product outline; but due to the 5m rolling mill CVC technology Due to the limitation of conventional blanks, it is not possible to use conventional blanks to produce thin plates with a width of less than 6mm. Using blank composite technology, composite blanks are produced for stacked rolling production. Through heating process, rolling schedule arrangement, plate crown control, temperature model optimization, pre-leveling and straightening The research...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B47/00
CPCB21B1/38B21B47/00B21B2001/386
Inventor 车超廖仕军郑明哲陈富强邓飞翔黄龙孙旭东王剑靳星王光磊胡建军
Owner NANJING IRON & STEEL CO LTD
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