Flux-cored wire special for maritime work low-temperature high-strength steel

A technology of flux-cored welding wire and high-strength steel, applied in welding medium, manufacturing tools, welding equipment, etc., can solve the problems of unsatisfactory low-temperature impact toughness and poor crack resistance, and achieve good cold crack resistance and excellent welding process performance effect

Inactive Publication Date: 2015-10-07
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a kind of non-additional boron (B) element whose mechanical properties can meet the impact toughness requirements of -60°C in view of the po

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  • Flux-cored wire special for maritime work low-temperature high-strength steel
  • Flux-cored wire special for maritime work low-temperature high-strength steel
  • Flux-cored wire special for maritime work low-temperature high-strength steel

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with specific examples, so that those skilled in the art can better understand the present invention and implement it, but the given examples are not intended to limit the present invention.

[0031] Examples The formula of the flux-cored welding wire is shown in Table 1, the steel skin is SPCC steel strip, and the conventional flux-cored welding wire manufacturing process is adopted.

[0032] Among them, the metal oxides in Examples 1 and 3 are ordinary magnesia, and the rare earth oxides are yttrium oxide. Example 2 is fused magnesia, and the rare earth oxide is yttrium oxide. The metal oxide of embodiment 4 is calcium oxide, and the rare earth oxide is lanthanum oxide, and the metal oxide of embodiment 5~9 is the mixture of magnesium oxide and calcium oxide, and rare earth oxide is mixed rare earth; Wherein embodiment 5,7 and Magnesium oxide in 9 is capacitor magnesia. The particle size of zircon ...

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Abstract

The invention discloses a flux-cored wire special for maritime work low-temperature high-strength steel. The flux-cored wire is composed of carbon steel skin and a flux core. The flux-cored wire comprises, by mass, 35%-40% of rutile, 2%-5% of magnesium oxide and/or calcium oxide, 0.5%-2% of zircon sand, 15%-25% of low-carbon ferromanganese, 4%-6% of magnesium fluoride, 2%-4% of aluminum magnesium alloy, 7%-10% of ferrosilicon, 5%-8% of ferrotitanium, 0.5%-2% of rare earth oxide, 9%-11% of nickel powder and the balance iron powder and inevitable impurities. The flux-cored wire does not contain boron (B) and has excellent welding technological performance. The comprehensive performance of deposited metal and welded joints is that the yield strength is larger than or equal to 470 MPa, the tensile strength is larger than or equal to 550 MPa, the elongation is larger than or equal to 22%, and KV2 is larger than or equal to 50 J when the temperature is -60DEG C.

Description

technical field [0001] The invention relates to a special flux-cored welding wire for marine low-temperature high-strength steel. Background technique [0002] Flux-cored welding wire has good welding process performance and welding efficiency, and has been used more and more in shipbuilding, marine engineering and other industries. In the construction of offshore oil drilling platforms, a large number of low-temperature high-strength steel welding materials are required, especially good low-temperature impact toughness. flux cored wire. At the same time, since many large and thick plates are used in offshore oil drilling platforms, good crack resistance is also required for welding materials. [0003] At present, high-strength steel plates commonly used in drilling platforms and offshore projects mainly include A514, A517, EQ70, WELDOX700, EQ51, EQ63, etc., and the corresponding welding materials are all products from the United States and Italy. [0004] CN101450426B dis...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3053B23K35/368
Inventor 吴光辉张少健王天虎
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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