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.
CN101508050AActive Publication Date: 2009-08-19CHINA 19TH METALLURGICAL CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA 19TH METALLURGICAL CORP
Publication Date
2009-08-19

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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 bevels between 40.5 and 41.5 DEG. 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.
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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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