Thick steel plate vertical welding method

A welding method, thick steel plate technology, applied in the direction of welding equipment, welding equipment, welding accessories, etc., to achieve the effect of smooth and beautiful forming

Inactive Publication Date: 2015-10-28
SUZHOU HUARI JINLING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a thick steel plate vertical seam welding method for the vertical seam welding of thick steel plate steel structures. Difficulty in welding

Method used

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Embodiment Construction

[0023] In order to make the purpose and technical solution of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with the embodiments of the present application. Apparently, the described embodiments are some of the embodiments of the present application, but not all of them. Based on the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0024] The double-wire gas-electric vertical welding machine includes two welding power sources, two wire feeders, a double-wire water-cooled torch, a welding trolley, a water-cooling system, a carbon dioxide gas supply system and a An electrically connected welding operation box, a welding power supply is connected to a wire feeder, the wire feeder, the water cooling system and the carbon...

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Abstract

The invention discloses a thick steel plate vertical welding method which comprises the following steps of welding preparation, welding, and postweld heat treatment, wherein in the step of postweld heat treatment, a workpiece enters a furnace wholly and subjected to postwelding stress relieving annealing treatment, and a method of the postweld heat treatment comprises the steps that the workpiece is arranged in the furnace with the furnace temperature not great than 300 DEG, heated to 625 DEG plus-minus 20 DEG at a rate of 65 DEG/h and kept for 6h, then cooled to below 300 DEG at a rate of 65 DEG/h, discharged out of the furnace and cooled in still air. Macrocosmically, no arc breaking occurs in a welding process; the surface of a welding seam is shaped smoothly and attractively; except lack of fusion at an arc end, no defect is found in fusion and transition between welding deposits of subsequent welding seams and wood. A cutting sampling analysis on the welding seams of a test piece for welding indicates that the mechanical properties of the welding seams are higher than those of parent metal; the rigidity of the parent metal in a heat-affected zone is lower than the rigidity of the welding seams, and is lightly higher than the rigidity of the parent metal outside the heat-affected zone; and the forming widths of the welding seams at the front and back are consistent.

Description

technical field [0001] The invention belongs to the technical field of welding, and in particular relates to a vertical seam welding method for thick steel plates. Background technique [0002] With the rapid development of my country's economic construction, thick steel plate steel structure welding has appeared in large numbers in metallurgy, shipbuilding, petrochemical, water conservancy and other industries. For the vertical seam welding of steel plates with a thickness of 60-100 mm (or even thicker), there is no high-quality and efficient welding method and related equipment. It is difficult to solve this problem with electrode arc welding, although electroslag welding can solve this problem. , for example, the application number is 201010180014.8, and the invention name is the patent of the welding method of the thick plate butt joint. One step, pre-welding preparation: add a variety of iron alloy elements to the tube coating formula to obtain powder; mix the powder e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/02B23K33/00B23K9/32B23K103/04B23K101/18
CPCB23K9/173B23K9/02B23K33/00B23K37/003B23K2101/185B23K2103/04
Inventor 向延海
Owner SUZHOU HUARI JINLING MACHINERY
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