Submerged-arc welding high-manganese high-silicon low-fluorine smelting type welding flux and preparing method and application thereof
A submerged arc welding and smelting type technology is applied in the field of submerged arc welding high manganese, high silicon and low fluorine smelting flux and its preparation. Excellent technical indicators, reducing toxic and harmful elements, and outstanding low temperature impact toughness
Inactive Publication Date: 2018-08-03
永州市产商品质量监督检验所
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Problems solved by technology
To sum up, domestic smelting flux manufacturing has problems such as serious resource consumption, high cost, serious pollution, relatively unstable process and mechanical properties of products, and cannot meet the increasing demand of the market
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[0029] Below in conjunction with embodiment the present invention is described in further detail.
[0030] A high-manganese, high-silicon, low-fluorine melting flux for submerged arc welding is characterized in that it consists of the following effective components and their mass percentages: SiO 2 40-44%, MnO 30-32%, Al 2 o 3 8~12%, CaF 2 6-8%, MgO 5-8%, CaO 1-3%, FeO 1.5-2.0%, S≤0.02%, P≤0.02%.
[0031] The preparation method of the above-mentioned high-manganese-high-silicon-low-fluorine smelting flux for submerged arc welding comprises the following steps:
[0032] (1) According to the formula design requirements, the raw materials are weighed in proportion, mixed and stirred evenly to obtain a uniformly mixed powder;
[0033] (2) Melting the uniformly mixed powder flux solid charge obtained in step (1) in an electric arc furnace with a reducing atmosphere, the melting temperature is 1400-1600° C., and kept for 30 minutes;
[0034] (3) water-quenching the product obt...
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Abstract
The invention relates to a submerged-arc welding high-manganese high-silicon low-fluorine smelting type welding flux and a preparing method and application thereof. The submerged-arc welding high-manganese high-silicon low-fluorine smelting type welding flux is composed of effective components including, by mass percent, 40 to 44% of SiO2, 30 to 32% of MnO, 8 to 12% of Al2O3, 6 to 8% of CaF2, 5 to8% of MgO, 1 to 3% of CaO, 1.5 to 2.0% of FeO, not larger than 0.02% of S and not larger than 0.02% of P. Compared with the prior art, the welding flux has the beneficial effects that according to the formula and the preparing method, the obtained submerged-arc welding high-manganese high-silicon low-fluorine smelting type welding flux can effectively save high-grade manganese mine resources, poisonous and harmful elements in a finished product welding flux can be reduced, the quality technical indexes are excellent, the low-temperature impact toughness is prominent, and the welding flux canbe effectively applied to welding of low-carbon steel and low-alloy structure steel.
Description
technical field [0001] The invention relates to the field of welding technology, in particular to a high-manganese-high-silicon-low-fluorine smelting flux for submerged arc welding and its preparation method and application. Background technique [0002] Flux is a kind of filler for automatic welding of submerged arc welding. As an automatic welding method developed in the 1940s, submerged arc welding has been widely used in boilers, pressure vessels, shipbuilding, petrochemicals, heavy machinery, Bridge, construction and other industries. Flux for submerged arc welding is one of the main consumable materials for submerged arc welding. Its welding process performance and chemical metallurgical performance are important factors that determine welding quality. According to the preparation method, flux can be divided into melting flux, sintering flux and ceramic flux. Ceramic flux is similar to sintered flux except that the sintering temperature is lower. The smelting flux i...
Claims
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IPC IPC(8): B23K35/30B23K35/40B23K9/18
CPCB23K9/186B23K35/3026B23K35/40
Inventor 谢先娇李勇贾友禄
Owner 永州市产商品质量监督检验所