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Method for synchronously welding two surfaces of stainless steel thick plate

A welding method and stainless steel technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as easy leakage points

Active Publication Date: 2012-08-01
JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The welding of stainless steel thick plates is different from ordinary steel plates. Due to the thickness of the plate, when welding from one side, the shrinkage rate of the two sides is different, and it is easy to produce leakage points. For pressure vessels, this is absolutely not allowed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] The construction of the air separation tower for the Oxygen Station project of a steelmaking plant in China, the air separation tower is made of 25mm stainless steel plate.

[0011] Welding equipment is purchased from the market, and supporting equipment includes: welding power supply, welding machine, welding wire reel, control device, cable equipment, etc.

[0012] (1) The welding power supply is 1 set of CR-H800 type DC flat characteristic power supply; input voltage: 3 phases, 380 volts, 50 / Hz; rated input capacity: 60kVA; rated output current: 800A; output voltage range: 24-42V; No-load voltage 75V; rated duty cycle: 100%, the output adopts silicon controlled rectifier control mode;

[0013] (2) The welding machine has 1 set of TM-90-7.2 lifting device, 1 set of WF-100-6.5 wire feeding device, 1 set of suspension rod and 1 set of T825 welding contact tip; the lifting motor is a DC 90W electromagnetic motor , Rising speed: 12-120 mm / min, the rising speed is control...

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Abstract

The invention discloses a method for synchronously welding two surfaces of a stainless steel thick plate, which is mainly used for welded connection of stainless thick plate equipment in the industries of metallurgy, chemical engineering and the like. The method mainly comprises the following steps of: synchronously welding the same welding seam from two surfaces by adopting a filament argon arc welding method under the condition of the same welding equipment, environment and welding condition to ensure that the welding seam is qualified by one step; and forming a method for synchronously welding the two surfaces of the stainless steel thick plate through filament argon arc welding to ensure that the welding seam is qualified by one step. The method has the advantages that: the same welding seam is welded from two surfaces synchronously, the contraction percentages of the two surfaces are the same, leakage points cannot be generated, and the welding seam can be qualified by one step, so that the method is particularly suitable for welding pressure containers.

Description

technical field [0001] The invention relates to a stainless steel thick plate welding method, which is mainly used for welding stainless steel thick plate equipment with a thickness of 25.0-100 mm in metallurgy, chemical industry and other industries; excluding stainless steel thin plates with a thickness of less than 25 mm and extra-thick stainless steel with a thickness greater than 100 mm plate. Background technique [0002] In metallurgical, chemical and other industries, due to the need for corrosion resistance, stainless steel plates with a thickness of 25-100 mm are often used to make equipment, and stainless steel needs to be welded during equipment installation. The current welding method is to weld from one side, or weld one side first and then face welding from the other side. The welding of thick stainless steel plates is different from that of ordinary steel plates. Due to the thickness of the plate, when welding from one side, the shrinkage rate of the two sid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/02
Inventor 宋功业
Owner JIANGSU VOCATIONAL INST OF ARCHITECTURAL TECH
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