High-strength high-tenacity sintered flux for afterheat-free welding

A sintered flux, high toughness technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve problems such as no requirements, achieve good weld surface quality, improve forming and slag removal, welding Beautifully stitched

Inactive Publication Date: 2015-06-24
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Through the search of about 50 existing flux patents, no sintered flux with weld metal yield strength above 600MPa was found
And in the above-mentioned patents, most of the flux content of sulfur and phosphorus are not required, only CN1326838A "fluorine-alkali type high-toughness sintered flux", CN1788920A "high-speed welding high-toughness fluorine-alkali type sintered flux", CN102085603A "reducing the sulfur and phosphorus content of welds Fluorine-alkali sintered flux for submerged arc wear-resistant surfacing" respectively proposed "S<0.04%; P<0.05%", "S<0.04%; P<0.05%", "S<0.03%; P<0.05%" 0.04%" technical requirements

Method used

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  • High-strength high-tenacity sintered flux for afterheat-free welding
  • High-strength high-tenacity sintered flux for afterheat-free welding

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Embodiment Construction

[0034] Below in conjunction with embodiment further specifically illustrate this patent. But the scope of protection of this patent is not limited to specific implementation manners.

[0035] 1) Components: See Table 1 for the components of Example 1 to Example 4. In the formula, the content of molybdenum in ferromolybdenum is 55~58%; the content of silicon in ferrosilicon is 43~46%; the specific composition of manganese ore is manganese compound, including Mn 2 o 3 , Mn 3 o 4 etc., the total content of Mn in the compound is 53~56%, and the specification is ≤80 mesh; the specific composition of magnesia is MgO≥99%, and the specification is ≤40 mesh; the specific technical index requirements for rare earth fluoride are: REO≥83%, Fluorine ≥ 26%, particle size ≤ 100 mesh.

[0036] component name Embodiment one Embodiment two Embodiment Three Embodiment Four fluorite 18 18 19 23 Magnesia 37 34 34 33 Bauxite 16 14 17 14 quartz ...

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Abstract

The invention discloses a high-strength high-tenacity sintered flux for afterheat-free welding. The sintered flux is mixed sinter composed of dry powder and pure sodium water glass with the modulus of 2.8-3.2, and the addition amount of the water glass is 18-20% of the weight of the dry powder. The dry powder is composed of, by weight percent, 18-23% of fluorite, 33-37% of magnesia, 14-17% of bauxite, 3-5% of quartz, 7-12% of marble, 9-13% of wollastonite, 0-1.5% of ferromolybdenum, 1-3% of rare earth fluoride, 1-2% of silicon iron, 1-3% of manganese ore, and 0-3% of borax. Compared with the prior art, the sintered flux can form welding slag with an appropriate melting point and good viscosity and surface tension. In the welding process, arc combustion is stable, welding line transition is smooth, spreading is good, and appearance of welding lines is attractive. The oxygen content in the welding lines is lowered. The sintered flux can be matched with the WS80S welding wire for welding 10CrNi5MoV steel, yield strength of metal of the welding lines can reach more than 735MPa, the metal of the welding lines is -50 DEG C, impact energy can reach more than 50J, and the metal of the welding lines of afterheat-free welding can be crack-free.

Description

technical field [0001] The invention relates to a welding material technology, in particular to a high-strength, high-toughness sintered flux for non-post-heat welding. Background technique [0002] Flux is a material used for submerged arc welding, and its main function is to protect the arc, so that the properties of the weld metal meet the relevant technical requirements. Flux is divided into smelting flux and sintering flux according to the production process. Compared with smelting flux, sintering flux has continuous production, no pollution, and high alkalinity, which is suitable for welding ultra-high-strength steel. While meeting high-strength requirements , to obtain higher plasticity and toughness. Sintered flux is widely used in shipbuilding, bridges, pressure vessels, metal structures and other welding manufacturing. [0003] With the improvement of my country's ship technical requirements, the steel used for ships is constantly developing, the application of u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362
Inventor 付学满朱丙坤
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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