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
  • Abstract
  • 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 plates by horizontal compound welding of vacuum electron beams. The cleaned slabs are horizontally combined and aligned, and the whole is horizontally hoisted to the work trolley, and the work trolley is moved to the vacuum chamber of the electron beam welding machine. The contact surface of the beam and the combined billet is on the same horizontal plane, forming an angle of 2 to 4° with the vertical direction of the slab, and the starting point of welding is located at 10mm adjacent to the edge to be welded, and the vacuum chamber is evacuated until the air pressure is ≤3 ×10 -3 Pa, by rotating the table 90 degrees or 180 degrees, one-time welding of the four sides of the contact surface of the combined billet is completed in sequence to ensure that the weld seam is uniform and the penetration depth is greater than 50mm, so that the composite interface between the combined billets is in a deep vacuum state, and the welding The completed composite slab is heated, rolled, flaw detected and heat treated to finally produce extra-thick steel plates. The deep vacuum electron beam horizontal composite welding production of composite slabs has been realized, the welding efficiency and welding success rate have been improved, and the composite rolling production rate of composite blanks has been greatly improved.

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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