Double-faced double-arc gas shielded welding technology for ultrahigh-strength steel

A technology of gas shielded welding and ultra-high-strength steel, which is applied in welding equipment, welding medium, welding equipment, etc., can solve the problems of magnetic deflection blowing and low welding efficiency, reduce filling amount, improve welding quality, and improve joint stress status effect

Active Publication Date: 2020-04-28
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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  • Double-faced double-arc gas shielded welding technology for ultrahigh-strength steel
  • Double-faced double-arc gas shielded welding technology for ultrahigh-strength steel
  • Double-faced double-arc gas shielded welding technology for ultrahigh-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 with 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 ...

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Abstract

The invention discloses a double-faced double-arc gas shielded welding technology for ultrahigh-strength steel. The process of preheating before welding and the process of heat treatment after weldingare adopted in the welding process, the interpass temperature and welding heat input are strictly controlled, and therefore weld joint grain thickening and performance reducing are avoided; and in addition, a double-faced simultaneous symmetrical MIG welding mode is adopted, therefore, the back gouging and grinding process is omitted, influences of magnetic blow are greatly reduced, the probability that backing weld beads have welding defects is effectively reduced, and the welding quality is improved. Compared with a traditional welding technology, back gouging is omitted, therefore, the welding filling amount is decreased by about 10%, and the welding efficiency is improved; and double-faced symmetrical welding is adopted, weld beads on the front face and the back face of a joint are fully symmetrically arranged, welding deformation is reduced, the stress state of the joint is improved, and welding cold cracks are effectively avoided.

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 Applications(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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