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Argon-rich carbon dioxide arc welding method

A technology of gas shielded welding and carbon dioxide, which is applied in welding equipment, arc welding equipment, and the edge of workpieces, etc., can solve the problems of weld metal impact energy and fusion zone performance that are not easy to control, and pressure vessels that have not been industrialized. To achieve the effect of improving the deposition efficiency

Active Publication Date: 2014-12-03
CHINA NAT CHEM ENG NO 14 CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the impact energy of the weld metal and the performance of the fusion zone are not easy to control, it has not been industrialized in the pressure vessel industry.

Method used

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  • Argon-rich carbon dioxide arc welding method

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Embodiment Construction

[0029] Below in conjunction with specific embodiment the technical scheme is further described as follows:

[0030] A welding method for argon-rich carbon dioxide gas shielded welding, the steps comprising:

[0031] 1) Process the welded joint groove of the weldment;

[0032] 2) Determine the protective gas ratio;

[0033] 3) Weld according to the welding process specification;

[0034] In the step 3), the welding process requirements include:

[0035] a) The protective gas is a mixture of argon and carbon dioxide gas, of which: at room temperature, the volume percentage is Ar, that is, argon is 79-80% and CO 2 That is, carbon dioxide gas is 21 to 20% CO 2 ;

[0036] b) During the welding process, ensure that the droplet transfer is a jet transfer (when the welding current increases to a certain extent, the droplet transfer form will become a jet transfer. Due to the different welding machine performance and welder's operation methods, choose different machines from diffe...

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Abstract

The invention discloses an argon-rich carbon dioxide arc welding method. The method comprises the following steps of: 1) machining a welded joint groove of a welded member; 2) determining the proportion of an shielding gas; 3) welding according to a welding process standard, and the welding process requirement includes: a) the shielding gas is a mixed gas of argon and carbon dioxide, wherein the volume percentage is as follows: under the normal temperature, Ar (argon) is 79%-80%, and CO2 (carbon dioxide) is 21%-20%; b) ensuring that the droplet transfer in the welding process is the spray transfer. The technical scheme has the following effects that the mechanical property of the welded joint is improved; the fusion zone performance is further improved; and the melting efficiency is improved, so that the impurity and the gas can overflow conveniently.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a mixed gas shielded welding welding method. Background technique [0002] Compared with traditional manual arc welding, carbon dioxide gas shielded welding has great advantages in work efficiency and economic benefits, and was popularized and applied in China in the 1980s. However, because the impact energy of the weld metal and the performance of the fusion zone are not easy to control, it has not been industrialized in the pressure vessel industry. Contents of the invention [0003] In order to solve the above-mentioned problems existing in the prior art, the present invention proposes a new ordinary carbon steel gas shielded welding welding method by changing the type of shielding gas, reducing the groove angle, improving the welding process and other measures. The specific technical scheme is as follows: [0004] A welding method for argon-rich carbon dioxide gas shielde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/16B23K33/00
Inventor 胡秋英崔定龙黄小刚章青蔡文生徐越兰
Owner CHINA NAT CHEM ENG NO 14 CONSTR