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Method for producing extra-thick steel plates by vacuum electron beam horizontal hybrid welding

A vacuum electron beam and composite welding technology, which is applied to electron beam welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of poor welding continuity, difficulty in clamping components, and low welding efficiency, so as to improve the quality of composite rolled products. efficiency, improving welding efficiency and welding success rate

Inactive Publication Date: 2016-08-17
ANGANG STEEL CO LTD
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The vacuum electron beam vertical welding method is equivalent to a group of composite billets that need to enter the vacuum chamber twice to complete the welding. The welding continuity is poor, the welding efficiency is very low, and the clamping components are difficult.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] Example 1: Using AGMJ45 high-carbon steel with a single billet specification of 4070×2100×300mm (length×width×thickness) as raw material, the production of a 600mm thick double-layer composite slab and a final steel plate with a specification of 9100×2100×260mm .

[0014] (1) Surface cleaning of slabs: the upper surface and surrounding sides of the slabs to be composited are milled by a milling machine to remove the surface oxide layer, and the dimensional deviation of the two slabs after milling must be ≤ 2mm. The processed surface of the slab after milling is wiped and cleaned with industrial alcohol and blown with clean compressed air.

[0015] (2) Blank assembly: lift one of the processed slabs to the slab turning device for slab turning operation so that the processing surface is downward; lift the slabs to the alignment device in turn to ensure that the turned slab Placed on the uppermost layer, the slabs to be composited are aligned by the alignment device.

[...

example 2

[0019] Example 2: Using Q345B steel with a single billet specification of 3840×2180×300mm (length×width×thickness) as raw material, a 900mm thick three-layer composite slab and a final steel plate with a specification of 3450×2410×440mm were produced.

[0020] (1) Slab surface cleaning: the upper surface and surrounding sides of the slab to be compounded are all milled by a milling machine to remove the surface oxide layer, and the two surfaces of the middle slab need to be milled completely, and the The dimensional deviation of a slab after milling must be ≤ 2mm. The processed surface of the slab after milling is wiped and cleaned with industrial alcohol and blown with clean compressed air.

[0021] (2) Blank assembly: lift one of the processed slabs to the slab turning device for slab turning operation so that the processing surface is downward; lift the slabs to the alignment device in turn to ensure that the turned slab Placed on the uppermost layer, the slabs to be compo...

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Abstract

The invention relates to a method for producing extra-thick steel plates by vacuum electron beam horizontal hybrid welding. The method comprises the steps that cleaned plate blanks are horizontally combined and aligned and are integrally and horizontally hoisted and conveyed to a service wagon; the service wagon is moved into a vacuum chamber of an electron beam welding machine, and the contact faces of electron beams and the combined blanks are placed in the same horizontal plane having the included angle of 2-4 degrees with respect to the perpendicular direction of the plate blanks; a welding starting point is located in the position 10 mm away from the side portion of the adjacent side of a to-be-welded side; the vacuum chamber is subjected to deep vacuum pumping until the pressure is smaller than or equal to 3*10<-3> Pa; a workbench is rotated by 90 degrees or 180 degrees to sequentially weld the periphery of the contact faces of the combined blanks at a time, and the effects that weld joints are even and the fusion depth is larger than 50 mm are guaranteed; the compound interface between the combined blanks is made to be in a deep vacuum state; and the welded combined plate blanks are subjected to heating, rolling, flaw detection and thermal treatment and finally the extra-thick steel plates are produced. The method achieves deep vacuum electron beam horizontal hybrid welding production of the combined plate blanks, improves the welding efficiency and welding success rate and greatly improves the clad rolling yield of the combined blanks.

Description

technical field [0001] The invention relates to the production of extra-thick steel plates, in particular to a method for producing extra-thick plates by vacuum electron beam horizontal composite welding. Background technique [0002] With the rapid development of modern industry, heavy (>20t) and extra-thick (>200mm) steel plates are increasingly used in steel fields such as high-end equipment manufacturing, offshore platforms, drilling platforms, building structures, and large carrier-based aircraft runways. More demand and wide application. At present, the production methods of extra thick plates mainly include die casting method and electroslag remelting method. Among them, the process of directly rolling extra-thick plate by die-casting steel ingot has low production efficiency, high cost, long cycle time, low yield, and complicated production process, which can no longer meet the needs of the rapid development of modern industry. It is mainly used for special pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K15/06
Inventor 于海岐李超费鹏赵雷殷东明龙山
Owner ANGANG STEEL CO LTD
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