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A double-sided double-arc gas-shielded welding process for ultra-high-strength steel

A gas shielded welding and ultra-high strength steel technology, applied in welding equipment, welding medium, welding equipment, etc., can solve the problems of magnetic bias blowing and low welding efficiency, reduce the filling amount, improve welding quality, and improve welding efficiency Effect

Active Publication Date: 2022-01-11
WUHAN WUCHUAN MEASUREMENT & TEST
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Problems solved by technology

[0009] The invention provides a double-sided double-arc gas shielded welding process for ultra-high-strength steel to solve the problems of severe magnetic deflection and low welding efficiency in the existing domestic ultra-high-strength steel welding method

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  • A double-sided double-arc gas-shielded welding process for ultra-high-strength steel
  • A double-sided double-arc gas-shielded welding process for ultra-high-strength steel
  • A double-sided double-arc gas-shielded welding process for ultra-high-strength steel

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] see figure 1 and figure 2 As shown, in Embodiment 1 of the present invention, the ultra-high-strength steel plate 10 with a thickness of 34 mm is welded by double-sided double-arc gas shielded welding, including the following steps:

[0028] (1) Sampling re-inspection of the test steel plate and welding consumables. The re-inspection content includes chemical composition and mechanical properties. The re-inspection result of the steel plate must meet the requirements of "GJB 7786-2012", and the re-inspection result of the welding wire must meet the "JS80 welding wire supply acceptance "Technical Conditions", the chemical composition of ultra-high-strength steel i...

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Abstract

A double-sided double-arc gas-shielded welding process for ultra-high-strength steel of the present invention adopts pre-weld preheating and post-weld heat treatment processes in the welding process, and strictly controls the interpass temperature and welding heat input to avoid weld grains Coarse, low performance; and the double-sided simultaneous symmetrical MIG welding method eliminates the need for back gouging and grinding processes, greatly reduces the influence of magnetic deflection blowing, and effectively avoids welding defects in the bottom weld bead The probability of welding is improved, and the welding quality is improved; compared with the traditional welding process, because the back gouging is eliminated, the welding filling amount is reduced, and the filling amount is reduced by about 10%, which improves the welding efficiency; double-sided symmetrical welding , The layout of the front and back weld beads of the joint is completely symmetrical, which reduces welding deformation, improves the stress state of the joint, and effectively avoids the occurrence of welding cold cracks.

Description

technical field [0001] The invention relates to the technical field of special steel welding, and more specifically relates to a double-sided double-arc gas-shielded welding process for ultra-high-strength steel. Background technique [0002] Ultra-high-strength steel is a weldable pressure-resistant shell steel with a yield strength of not less than 785MPa. It not only has high strength, high toughness, corrosion resistance, but also has a large thickness span (16-80mm), and has good welding process adaptability. Among them, the chemical composition of ultra-high-strength steel is shown in Table 1, and the mechanical properties meet the requirements in Table 2. [0003] Table 1 Chemical composition of ultra-high strength steel [0004] [0005] Table 2 Mechanical properties of ultra-high strength steel [0006] [0007] At present, traditional manual arc welding and gas shielded welding are mainly used for ultra-high-strength steel welding. After the front side wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/173B23K9/235B23K9/32B23K35/30B23K103/04
CPCB23K9/173B23K9/235B23K9/32B23K35/3066B23K2103/04
Inventor 谢雪新尹克明陈齐
Owner WUHAN WUCHUAN MEASUREMENT & TEST
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