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Method for rolling special thick board by means of vacuum compositing

A technology of compound rolling and extra-thick plate, applied in the field of vacuum compound-rolling extra-thick plate, can solve the problems of high energy consumption, uneven chemical composition and physical properties, and high production cost, and avoid uneven ends and good Application prospect, easy operation effect

Active Publication Date: 2010-07-14
沈阳科安捷材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional methods of manufacturing extra-thick plates mainly include model casting method and electroslag remelting manufacturing method. Among them, the production process efficiency of die casting method is low, and the yield is low, generally around 75%.
In addition, the chemical composition and physical properties of the billet are not uniform, and the defects in the center of the billet are difficult to eliminate
Electroslag remelting method has low production efficiency, large energy consumption and high production cost

Method used

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  • Method for rolling special thick board by means of vacuum compositing
  • Method for rolling special thick board by means of vacuum compositing
  • Method for rolling special thick board by means of vacuum compositing

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Embodiment 1

[0026] A method for vacuum composite rolling of extra-thick plates according to the present invention will be described in combination with embodiments and accompanying drawings.

[0027] Method of the present invention carries out according to the following steps:

[0028] Step 1. Select two continuous casting billets whose material is Q235B and whose size is 270mm×2100mm×2400mm. Weld two support plates on the two sides of one of the billets respectively, and the material of the support plate is Q235. Use a gantry milling machine to process the composite surfaces of the two blanks until the metal surface is exposed, and stack the composite surfaces of the two blanks on the trolley. The blank welded with the support plate is used as the upper blank. For a billet, the lifting speed is 1mm / min, and the lifting height is 1mm;

[0029] The mechanical lifting device such as figure 1 with 2 The shown includes two support plates, four support rods, a motor and a bracket, the suppo...

Embodiment 2

[0035] Step 1. The material of the two continuous casting billets is Q235B, and the size is 270mm×2100mm×2400mm. Two support plates are respectively welded on the two sides of one of the billets, and the material of the support plate is Q235. Use a gantry milling machine to process the composite surfaces of the two blanks until the metal surface is exposed, and stack the composite surfaces of the two blanks on the trolley. The blank welded with the support plate is used as the upper blank. For each billet, the lifting speed is 30mm / min, and the lifting height is 1.5mm;

[0036] Step 2. Use the mechanical lifting device to raise the upper blank, and then start vacuuming, vacuum degree = 0.5×10 -2 Pa, use the billet lifting mechanism to lower the upper layer of the superimposed two blanks, so that the two blanks are re-stacked together, and carry out electron beam welding around the joint surface of the blanks. The welding voltage is 80kV, the current is 100mA, and the welding s...

Embodiment 3

[0039] Step 1. The material of the two continuous casting billets is Q235B, and the size is 270mm×2100mm×2400mm. Two support plates are respectively welded on the two sides of one of the billets, and the material of the support plate is Q235. Use a gantry milling machine to process the composite surfaces of the two blanks until the metal surface is exposed, and stack the composite surfaces of the two blanks on the trolley. The blank welded with the support plate is used as the upper blank. For a billet, the lifting speed is 60mm / min, and the lifting height is 2mm;

[0040] Step 2. Use the mechanical lifting device to raise the upper blank, and then start vacuuming, vacuum degree = 0.75×10 -2 Pa, use the billet lifting mechanism to lower the upper blank of the superimposed two blanks, so that the two blanks are stacked again, and carry out electron beam welding around the joint surface of the blanks. The welding voltage is 150kV, the current is 200mA, and the welding speed is 5...

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Abstract

The invention relates to a method for rolling special thick board by means of vacuum compositing, belonging to the technical field of metallurgy, which comprises the following steps of: 1. leading the faces to be composited of blanks on the horizontal direction to be opposite to each other and completely overlapped with each other, and lifting up the blanks with a mechanical lifting device; 2. welding the periphery of the joint face of the two blanks by means of vacuum electron beam in vacuum; and 3. rolling the welded blanks. The method has the advantages that the composite faces of the special thick board has no impurity, and the separation distance is previously set on the faces to be composited of the blanks before vacuumizing to prevent some air from being sealed in the composite faces before welding and prevent the composite faces from being oxidized; and by moving the blanks, the two faces to be composited are parallel with each other when jointing not to influence the electron beam welding caused by the irregular of the end part. The method is simple and convenient in operation, has obvious effect, and has good application foreground.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for vacuum composite rolling extra-thick plates. Background technique [0002] In the production of steel plates, extra-thick plates are widely used in heavy machinery, boilers, nuclear power, shipbuilding, offshore platforms, bridges, airports, etc. The traditional methods of manufacturing extra-thick plates mainly include model casting method and electroslag remelting manufacturing method. Among them, the production process efficiency of die casting method is low, and the yield is low, generally around 75%. In addition, the chemical composition and physical properties of the billet are not uniform, and the defects in the center of the billet are difficult to eliminate. Electroslag remelting method has low production efficiency, large energy consumption and high production cost. The vacuum compound rolling method uses common continuous casting billets a...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B47/02B23K15/06
Inventor 骆宗安谢广明王国栋王黎筠吴庆林
Owner 沈阳科安捷材料技术有限公司
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