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An ultra-low hydrogen seamless submerged arc flux-cored welding wire for steel with a yield strength of 690mpa

A flux-cored wire, yield strength technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., to achieve sufficient deoxidation, reduce the content of inclusions, and reduce the effect of diffusible hydrogen

Active Publication Date: 2018-07-24
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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At present, there are no patents and documents related to the seamless submerged arc flux-cored welding wire that can be used for welding steel with a yield strength of 690MPa

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  • An ultra-low hydrogen seamless submerged arc flux-cored welding wire for steel with a yield strength of 690mpa
  • An ultra-low hydrogen seamless submerged arc flux-cored welding wire for steel with a yield strength of 690mpa
  • An ultra-low hydrogen seamless submerged arc flux-cored welding wire for steel with a yield strength of 690mpa

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Embodiment Construction

[0015] 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 examples.

[0016] An ultra-low hydrogen seamless submerged arc flux-cored wire for steel with a yield strength of 690MPa, consisting of a sheath and a core powder, the sheath is made of a low-carbon steel strip, and the filling rate of the core powder in the flux-cored wire is 10- 15%, the drug core powder is composed of the following raw materials according to the mass percentage: marble 8-12%, fluorite 4-8%, metal nickel 25-30%, metal chromium 2-4%, molybdenum iron 7-9%, electrolytic manganese 12-16%, ferrosilicon 1-3%, ferro-titanium 3-5%, ferro-boron 2-4%, potassium titanate 2-3%, potassium fluoride 1-3%, sodium fluoride 1-3%, The balance is iron powder.

[0017] The design basis of the seamless submerged arc flux-cored welding wire flux core of the present invention is as follows:

[0018] The...

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Abstract

The invention discloses an ultralow hydrogen seamless submerged arc flux-cored wire for steel with yield strength being the 690 MPa level. The submerged arc flux-cored wire is composed of a sheath and flux core powder. The sheath is made of a low-carbon steel strip. The flux core powder is prepared from, by mass percent, 8%-12% of marble, 4%-8% of fluorite, 25%-30% of metal nickel, 2%-4% of metal chromium, 7%-9% of ferromolybdenum, 12%-16% of electrolytic manganese, 1%-3% of ferrosilicon, 3%-5% of ferrotitanium, 2%-4% of ferro-boron, 2%-3% of potassium titanate, 1%-3% of potassium fluoride, 1%-3% of sodium fluoride and the balance ferrous powder. The ultralow hydrogen seamless submerged arc flux-cored wire for the steel with the yield strength being the 690 MPa level is high in moisture absorption resisting property, and excellent in processing property of being matched with fluorine and alkali sintered flux SR-SJ613, diffusible hydrogen is extremely low (smaller than or equal to 4 mL / 100 g), minus 40 DEG C charpy impact energy reaches over 100 J, and the wire can be applied to welding of a steel plate with the yield strength being the 690 MPa level in the ocean engineering field.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to an ultra-low hydrogen seamless submerged arc flux-cored welding wire for steel with a yield strength of 690MPa. Background technique [0002] With the rapid and sharp decline of onshore oil and gas resources, offshore oil and gas resources are gradually expanding from offshore to pelagic and deep sea. At the same time, marine engineering equipment used for oil and gas exploitation is also gradually developing in the direction of large-scale, high-parameterization, and lightweight. Steel plates with a yield strength of 690MPa have been widely used in the field of marine engineering equipment due to their high strength and good low-temperature toughness. The service environment of marine engineering equipment is generally relatively harsh, so the requirements for matching welding consumables for steel plates with a yield strength of 690MPa are relatively high. These wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3066B23K35/368
Inventor 孔红雨亢天佑聂建航王青云
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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