Sintered flux for welding of high-strength steel for ocean engineering and preparation method of sintered flux

A technology of sintering flux and marine engineering, which is applied in welding equipment, welding medium, metal processing equipment, etc., can solve the problems of limited application range and imperfection, and achieve the effects of stable arc, uniform flux particle size, and beautiful weld bead formation

Active Publication Date: 2017-01-04
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Problems solved by technology

So far, domestic and foreign technologies related to submerged arc welding flux for high-strength steel on offshore engineering platforms are not perfect. A high-toughness and low-hydrogen type sintered flux for marine engineering and its manufacturing method (application number 201510577473.2), the patent invention is m...

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  • Sintered flux for welding of high-strength steel for ocean engineering and preparation method of sintered flux
  • Sintered flux for welding of high-strength steel for ocean engineering and preparation method of sintered flux
  • Sintered flux for welding of high-strength steel for ocean engineering and preparation method of sintered flux

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Embodiment Construction

[0019] In order to make the content of the present invention more obvious and understandable, the present invention will be described in detail below in conjunction with specific embodiments.

[0020] A sintered flux used for welding high-strength steel in marine engineering. It belongs to the fluorine-alkali type sintered flux. It is composed of the following components in parts by weight: MgO 19-24 parts, CaF 2 20-25 copies, Al 2 O 3 12~16 parts, SiO 2 4~8 parts, CaO8~10 parts, BaO2~4 parts, NaF1~3 parts, LiF 1-3 parts, ZrO 2 1-2 parts, Fe 2 O 3 2-3 parts, 0.5~1.5 parts of alloy and 14-16 parts of water glass. The sintered flux, flux slag is mainly composed of MgO-CaO-BaO-CaF 2 -Al 2 O 3 -SiO 2 Department of composition.

[0021] The method of adding each component of the flux of the present invention is as follows: MgO is in the form of magnesia; CaF2 is in the form of fluorite, Al 2 O 3 In the form of α-alumina, SiO 2 In the form of wollastonite, CaO in the form of wollastonit...

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Abstract

The invention discloses sintered flux for welding of high-strength steel for ocean engineering and a preparation method of the sintered flux. The sintered flux belongs to fluoride-basic type sintered flux and is prepared from components in parts by weight as follows: 19-24 parts of MgO, 20-25 parts of CaF2, 12-16 parts of Al2O3, 4-8 parts of SiO2, 8-10 parts of CaO, 2-4 parts of BaO, 1-3 parts of NaF, 1-3 parts of LiF, 1-2 parts of ZrO2, 2-3 parts of Fe2O3, 0.5-1.5 parts of an alloy and 14-16 parts of water glass. The sintered flux has good manufacturability, has arc stability under broader process specification, can meet requirements for welding of E550 steel plates with yield strength higher than 550 MPa and E690 steel plates with yield strength higher than 690 MPa and has lower diffusible hydrogen, slag removal is easy, and welding bead forming is attractive.

Description

Technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a sintered flux for welding high-strength steel in marine engineering and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the demand for oil is also increasing. Due to the rapid decline of my country's onshore oil resources, offshore oil and gas development has become a hot spot in my country's energy development. Since my country entered the field of offshore oil platform drilling in the 1950s, after half a century of hard work, my country has made great progress in the fields of offshore drilling and marine equipment manufacturing. Due to the harsh working environment of marine equipment, the requirements for marine engineering steel and its matching welding consumables are relatively high. At present, steel plates with a yield strength of 550MPa and 690MPa have been domestically produced, but the...

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Application Information

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IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/362B23K35/40
Inventor 亢天佑孔红雨黄健成聂建航
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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