A high-strength and high-toughness basic flux-cored welding wire
A technology of flux-cored welding wire with high toughness, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of difficult slag removal, poor process performance, large spatter, etc., and achieve excellent welding process performance, excellent Low temperature toughness, high strength effect
Active Publication Date: 2016-11-02
上海焊接器材有限公司
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Problems solved by technology
However, the shortcomings of basic flux-cored wire welding, such as large spatter, difficult slag removal, thick smoke, and poor vertical welding and horizontal welding process performance, limit the application.
Method used
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[0025] The high-strength and high-toughness basic flux-cored welding wires of Examples 1 to 3 include a sheath and a basic flux core filled in the sheath, and the sheath is made of low-carbon steel strip, which undergoes three processes of rolling-closing-drawing Make welding wire with a diameter of Φ1.2mm, and finally divide into rolls for use.
[0026] See Table 1 and Table 2 for the distribution ratio of each component of the basic flux core in the high-strength and high-toughness basic flux-cored welding wire of Examples 1 to 3, the filling rate of the basic flux core, and the pH. Each component of the alkaline drug core is a commercially available material. where ZrO 2 、Na 2 SiF 6 、KAlSi 3 o 8 Purchased from Hengyun Mining Company, TiO 2 Purchased from a company in Australia, CaF 2 Purchased from Guangfeng Company, CaCO 3 Purchased from Gaozi Company, Al-Mg alloy was purchased from Shanghai Jiuding, iron powder was purchased from Zhengzhou Welding Material Company...
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Abstract
The invention discloses a high-strength and high-tenacity basic flux cored wire. The high-strength and high-tenacity basic flux cored wire comprises a sheath and a basic flux core with which the sheath is filled. The sheath adopts a mild-carbon steel strip and is obtained through the three working procedures of rolling, folding and drawing. The pH value of the basic flux core ranges from 2.1 to 3.5. The basic flux core comprises, by weight, 3%-7% of ZrO2, 1%-5% of Na2SiF6, 1.5%-6% of KAlSi3O8, 2%-5% of TiO2, 12%-25% of CaF2, 2%-6% of CaCO3, 1%-3% of Al-Mg alloy, 25%-35% of metal powder, and the balance iron powder. During welding of the high-strength and high-tenacity basic flux cored wire, CO2 gas is adopted as protective gas, the welding arc is stable, the amount of spatter and smog is small, deslagging is easy, welding joints are attractive in appearance, the strength of the welding joints can reach more than 830 MPa, the good low-temperature toughness is achieved, and the high-strength and high-tenacity basic flux cored wire is applicable to all-position welding of 830 Mpa grade high-strength steel.
Description
Technical field: [0001] The invention belongs to the technical field of welding materials, and provides a high-strength and high-toughness basic flux-cored welding wire. Background technique: [0002] With the development of social economy, industries that use large-scale steel structures, such as construction, shipbuilding, and automobile industries, are booming. Its requirements for steel strength are getting higher and higher, among which 800-1500MPa high-strength steel is widely used. While high strength is required, higher requirements are also put forward for its toughness, especially low temperature toughness. Therefore, the welding of high-strength steel, especially the research on matching welding materials, has attracted the attention of welding workers. At present, the flux-cored welding wire used in China is mainly based on acid slag system. When welding with acid flux-cored wire, there is less spatter, easy slag removal, and stable arc, but the hydrogen diffus...
Claims
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IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3053B23K35/368
Inventor 古丽平吴伦发俞华琴罗茜
Owner 上海焊接器材有限公司