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CO2 gas shielded welding method

A technology of gas shielded welding and welding methods, which is applied in welding equipment, arc welding equipment, manufacturing tools, etc., and can solve problems such as poor formation of gas shielded welding seams, unreasonable angles between welding wire and weld bead, etc.

Active Publication Date: 2011-07-27
CHINA 19TH METALLURGICAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Third, the angle between the welding wire and the weld bead is unreasonable, etc.
[0005] 3. CO 2 Poor weld seam formation in gas shielded welding: from CO 2 Since the use of gas shielded welding, the poor forming has not been fundamentally solved

Method used

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] During operation, use ordinary flat outer characteristic welding power supply, connect the contact tip, welding wire and the positive pole of the welding power supply through the cable and the conductive mechanism of the welding torch, and connect the workpiece and the negative pole of the welding power supply through the cable (that is, the polarity of the power supply adopts DC Reverse connection). The welding wire is arranged in the middle of the groove through the welding torch adjustment mechanism installed on the welding trolley, the height of the contact tip from the workpiece is adjusted through the welding torch height adjustment mechanism, and the welding speed is adjusted by adjusting the walking speed of the welding trolley. Also, avoid welding on rainy, snowy, windy or humid cloudy days, or not welding important welds.

[0...

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Abstract

The invention discloses a welding method for CO2 gas shielded welding, which selects a flux-cored wire with a deoxidizing agent component for welding, and comprises: before welding, removing moisture in the CO2 gas and cleaning impurities on a workpiece; and in the welding process, selecting reasonable welding conditions, current, voltage, electric arc and wire extending length, and controlling temperature and humidity of operating environment, wherein workpieces of which the thickness is less than 6mm are provided with I-shaped bevels; and workpieces of which the thickness is more than 6mm are provided with V-shaped bevels between 40.5 and 41.5 degrees. The method solves the problems that the oxidability of the CO2 gas shielded welding and the size of air holes and bevels influence material using amount, the formation of weld of the CO2 gas shielded welding is poor, and the like by the prior welding method.

Description

technical field [0001] The invention relates to a welding method, in particular to a CO 2 Welding method of gas shielded welding. Background technique [0002] In prior art CO 2 Gas shielded welding is widely used, but the following problems exist in the existing process: [0003] 1. CO 2 Oxidation of gas shielded welding: in CO 2 In gas shielded welding, shielding gas CO 2 During high-temperature welding, CO and O2 are decomposed, which have a strong oxidation effect and cause alloy elements to burn out, and the oxidation property is also CO 2 An important reason for the generation of pores and spatter in gas shielded welding. The iron oxide generated by oxidation can be melted in a large amount in the molten pool metal, which will cause defects such as pores and slag inclusions in the weld metal. [0004] 2. Stomata: The generation of pores is mainly due to the generation of hydrogen pores. The main reason for the generation of hydrogen pores is that impurities and h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K9/12B23K33/00
Inventor 曹家康
Owner CHINA 19TH METALLURGICAL CORP
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