A seamless submerged arc flux-cored welding wire for steel with a yield strength of 550mpa

A technology of flux-cored welding wire and yield strength, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve the problem of no seamless submerged arc flux-cored welding wire, etc., to reduce the content of inclusions and increase the quantity , reducing the effect of diffusing hydrogen

Active Publication Date: 2018-12-25
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

At present, there is no seamless submerged arc flux-cored welding wire and related content available for welding steel with a yield strength of 550MPa

Method used

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  • A seamless submerged arc flux-cored welding wire for steel with a yield strength of 550mpa
  • A seamless submerged arc flux-cored welding wire for steel with a yield strength of 550mpa
  • A seamless submerged arc flux-cored welding wire for steel with a yield strength of 550mpa

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Embodiment Construction

[0014] 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.

[0015] A seamless submerged arc flux-cored welding wire for steel with a yield strength of 550MPa, consisting of a sheath and a core powder, the sheath is a low-carbon steel strip, and the filling rate of the core powder is 10%-15%, and the core powder According to the weight percentage, it is composed of the following components: nickel powder 8%-10%, molybdenum iron 3%-6%, metal manganese 10%-14%, rare earth ferrosilicon 6%-8%, titanium iron 3%-5%, Zirconium iron 1%-2%, boron iron 1%-3%, potassium titanate 1%-2%, sodium fluoride 1%-3%, and the balance is iron powder.

[0016] In the present invention, the main function of the nickel powder is a transition alloy. Nickel is an important element to improve low-temperature toughness. It can refine grains, reduce segregation, and promote the...

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Abstract

The invention discloses a seamless submerged arc flux-cored wire for steel with the yield strength being 550 MPa. The seamless submerged arc flux-cored wire is composed of a casing and flux core powder. The casing is a low-carbon steel strip. The flux core powder is prepared from, by weight, 8%-10% of nickel powder, 3%-6% of ferro-molybdenum, 10%-14% of manganese metal, 6%-8% of rare earth ferrosilicon, 3%-5% of ferrotitanium, 1%-2% of ferrozirconium, 1%-3% of ferro-boron, 1%-2% of potassium titanate, 1%-3% of sodium fluoride, and the balance iron powder. The seamless submerged arc flux-cored wire is extremely high in moisture absorption resistance and is matched with fluoride-basic type sintered flux SR-SJ613, the technical properties are excellent, diffusible hydrogen is smaller than or equal to 5 ml every 100 g (based on a gas chromatographic method), the Charpy impact energy at minus 40 DEG C reaches 100 J or over, and the seamless submerged arc flux-cored wire can be applied to welding of steels plates with the yield strength being 550 MPa in high-end technical fields such as ocean engineering and naval construction.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a seamless submerged arc flux-cored welding wire for steel with a yield strength of 550 MPa. Background technique [0002] Steel plates with a yield strength of 550MPa are widely used in high-end technical fields such as marine engineering, shipbuilding, bridges, construction, and petrochemicals. Structural steel plates in these fields are generally thicker and have relatively harsh service conditions. Therefore, higher requirements are put forward for the corresponding submerged arc welding consumables: (1) have good process performance, especially spreadability, and avoid galling Defects such as edges, unfused and slag inclusions; (2) Good low-temperature toughness, Charpy impact energy greater than 55J at -40°C; (3) Low diffusible hydrogen, due to the thicker plate thickness, the restraint stress during welding is larger , cold crack sensitivity is great...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30
CPCB23K35/3073
Inventor 孔红雨亢天佑黄健成王青云
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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