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A kind of ultra-low hydrogen high toughness welding rod for cryogenic spherical tank

An ultra-low hydrogen, high toughness technology, applied in welding equipment, welding media, welding/cutting media/materials, etc., can solve the problems of high manufacturing cost and high price of ethylene (propylene) spherical tanks, and achieve easy procurement. , The effect of low production cost and high purity

Active Publication Date: 2018-10-02
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the welding rods for the existing low-temperature ethylene (propylene) spherical tanks with 610MPa grade high-strength steel generally use imported welding materials. Due to the brand effect, the price of such foreign corresponding welding materials remains high, which leads to the manufacture of ethylene ( Propylene) spherical tanks have high manufacturing costs, so it is necessary to develop a matching welding material to replace imported materials and reduce manufacturing costs

Method used

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  • A kind of ultra-low hydrogen high toughness welding rod for cryogenic spherical tank
  • A kind of ultra-low hydrogen high toughness welding rod for cryogenic spherical tank

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Effect test

Embodiment 1

[0034] This embodiment provides an ultra-low hydrogen high-toughness electrode for low-temperature spherical tanks, which is composed of a steel core and a coating. The steel core is H08GX steel wire, and the steel core and coating are low-modulus pure sodium with a modulus of 2.8 to 3.0. Water glass is used as a binder for bonding, and the coating accounts for 33-38% of the total weight of the electrode. The composition of the coating is as follows: CaCO 3 : 37%, CaF 2 : 20%, TiO 2 : 10%, SiO 2 : 9.0%, Si-Fe: 5.0%, Mn: 4.0%, Mo: 0.7%, Mg: 1.0%, Ni: 4.0%, CMC: 1.0%, seaweed: 0.5%, light rare earth oxide: 2.0%, carbonic acid Lithium: 0.6%, graphite: 1.0%, and the balance is iron powder.

Embodiment 2

[0036] This embodiment provides an ultra-low hydrogen high-toughness electrode for low-temperature spherical tanks, which is composed of a steel core and a coating. The steel core is H08GX steel wire, and the steel core and coating are low-modulus pure sodium with a modulus of 2.8 to 3.0. Water glass is used as a binder for bonding, and the coating accounts for 33-38% of the total weight of the electrode. The composition of the coating is as follows: CaCO 3 : 44%, CaF 2 : 20%, TiO 2 : 6.0%, SiO 2 : 4.0%, Si-Fe: 5.0%, Mn: 6.0%, Mo: 1.2%, Mg: 1.0%, Ni: 2.0%, CMC: 1.5%, seaweed: 1.0%, light rare earth oxide: 4.0%, carbonic acid Lithium: 1.0%, graphite: 0.5%, and the balance is iron powder.

Embodiment 3

[0038] This embodiment provides an ultra-low hydrogen high-toughness electrode for low-temperature spherical tanks, which is composed of a steel core and a coating. The steel core is H08GX steel wire, and the steel core and coating are low-modulus pure sodium with a modulus of 2.8 to 3.0. Water glass is used as a binder for bonding, and the coating accounts for 33-38% of the total weight of the electrode. The composition of the coating is as follows: CaCO 3 : 40%, CaF 2 : 20%, TiO 2 : 6.0%, SiO 2 : 6.0%, Si-Fe: 8.0%, Mn: 5.0%, Mo: 1.0%, Mg: 2.0%, Ni: 3.0%, CMC: 1.0%, seaweed: 0.8%, light rare earth oxide: 3.0%, carbonic acid Lithium: 0.8%, graphite: 0.8%, and the balance is iron powder.

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Abstract

The invention provides an ultralow-hydrogen high-tenacity welding rod for a low-temperature spherical tank. The ultralow-hydrogen high-tenacity welding rod comprises a steel core and a cover. The cover is composed of, by mass, 37%-44% of CaCO3, 20%-29% of CaF2, 6.0%-10% of TiO2, 4.0%-9.0% of SiO2, 5.0%-8.0% of Si-Fe, 4.0%-6.0% of Mn, 0.7%-1.2% of Mo, 1.0%-3.0% of Mg, 2.0%-4.0% of Ni, 1.0%-1.5% of CMC, 0.5%-1.0% of seaweed, 2.0%-4.0% of light rare earth oxide, 0.6%-1.0% of lithium carbonate, 0.5%-1.0% of graphite, and the balance iron powder. The ultralow-hydrogen high-tenacity welding rod for the low-temperature spherical tank is small in welding spattering, attractive in appearance, capable of achieving slag removal easily, high in deposition rate, excellent in welding performance, stable in electric arc, free of arc bias, and high in impact toughness at the lower temperature of minus 50 DEG C; the diffusible hydrogen [H] content of deposited metal is lower than 4 mL per 100 g, and the index requirement of ultralow hydrogen is met; and the materials of the welding rod are easy to purchase, and the welding rod is low in production cost, wide in application range and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and specifically relates to an ultra-low hydrogen high-toughness welding rod for low-temperature spherical tanks, which is an ultra-low-hydrogen high-toughness welding rod for low-temperature spherical tanks with a low-hydrogen sodium coating, and is mainly used for large-scale oil refining, ethylene ( Acrylic) welding of important structures such as spherical tanks. Background technique [0002] The ethylene industry is an important basic raw material industry for the national economy. The metal materials selected are mainly carbon steel, alloy steel and stainless steel. The ethylene (propylene) spherical tank is one of the key equipment, and the metal material used requires a high-strength steel plate that can withstand low temperatures of -50°C. Before 2007, the ethylene and propylene spherical tanks used in domestic large-scale oil refining and ethylene projects were mainly made o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K35/24
CPCB23K35/24B23K35/362
Inventor 刘东杨恒闯张亚平程伟平
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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