Metal powder flux-cored wire for 1000 MPa high-strength steel and production process thereof

A technology of flux-cored welding wire and production process, applied in the field of metal powder type flux-cored welding wire for 1000MPa high-strength steel and its production process, can solve the problems of few varieties of high-strength steel flux-cored welding wire, high fatigue strength, high formability, etc. Improve welding efficiency, reduce slag amount, good toughness effect

Active Publication Date: 2016-12-14
ATLANTIC CHINA WELDING CONSUMABLES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because high-strength steel has the advantages of high impact energy, high fatigue strength, and high formability, in recent years, low-alloy high-strength steel with a tensile strength of 850 MPa or more has been widely used in offshore oil production platforms, military industries, and heavy machinery. There are few types of high-strength steel flux-cored wires that are matched with it, and they almost rely on imports

Method used

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  • Metal powder flux-cored wire for 1000 MPa high-strength steel and production process thereof
  • Metal powder flux-cored wire for 1000 MPa high-strength steel and production process thereof
  • Metal powder flux-cored wire for 1000 MPa high-strength steel and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A low-carbon steel strip of (width×thickness) 14mm×0.8mm is used as the steel sheath of the flux-cored wire, and its chemical composition is: C 0.029wt%, Mn 0.24wt%, Si 0.013wt%, S 0.004wt%, P 0.009wt% and the balance Fe and unavoidable impurities.

[0040] Taking the preparation and production of 100Kg flux-cored wire as an example, the powder core in this embodiment accounts for 14.5wt% of the total mass of the entire flux-cored wire, that is, the weight of the powder core is 14.5Kg; wherein, the components in the powder core are: manganese-silicon alloy 0.73kg, ferrosilicon powder 0.58kg, ferrosilicon powder 0.15kg, sodium fluoride 0.029kg, manganese powder 1.74kg, nickel powder 2.03kg, molybdenum iron 1.06kg, chromium powder 0.54kg, and the iron powder of surplus; The components of the medicinal powder core are sieved and mixed uniformly before use.

[0041] Put the low-carbon steel strip in the welding wire forming machine, inject the ready-to-use powder core into...

Embodiment 2

[0043] The steel sheath of the flux-cored wire is the same as in Example 1.

[0044] Taking the preparation and production of 100Kg welding wire as an example, the powder core of this embodiment accounts for 15.5wt% of the total mass of the entire flux-cored wire, that is, the weight of the powder core is 15.5kg; wherein, each component in the powder core is: manganese-silicon alloy 0.78kg, silicon 0.62kg of iron powder, 0.16kg of titanium iron powder, 0.03kg of sodium fluorosilicate, 1.86kg of manganese powder, 2.17kg of nickel powder, 1.09kg of ferromolybdenum, 0.57kg of chromium powder, and the remaining iron powder; All components are sieved and mixed evenly before use.

[0045] Put the low-carbon steel strip in the welding wire forming machine, inject the ready-to-use powder core into the groove of the steel strip bent transversely into a "U" shape, and then roll it into wire and reduce the diameter to Φ1. 6mm to get 1000MPa high-strength steel metal powder cored wire. ...

Embodiment 3

[0047] The steel sheath of the flux-cored wire is the same as in Example 1.

[0048] Taking the preparation and production of 100Kg welding wire as an example, the powder core of this embodiment accounts for 14.5wt% of the total mass of the entire flux-cored wire, that is, the weight of the powder core is 14.5Kg; wherein, the components in the powder core are: manganese-silicon alloy 1.02kg, silicon Iron powder 0.44kg, titanium iron powder 0.15kg, potassium fluoroaluminate 0.03kg, manganese powder 1.60kg, nickel powder 2.03kg, molybdenum iron 1.16kg, chromium powder 0.58kg, and iron powder of the balance; All components are sieved and mixed evenly before use.

[0049] Put the low-carbon steel strip in the welding wire forming machine, inject the ready-to-use powder core into the groove of the steel strip bent transversely into a "U" shape, and then roll it into wire and reduce the diameter to Φ1. 2mm to get 1000MPa high-strength steel metal powder cored wire.

[0050] The fl...

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Abstract

The invention discloses a metal powder flux-cored wire for 1000 MPa high-strength steel and a production process thereof. The flux-cored wire comprises a steel cover and a flux core; the flux core comprises the following components in percentage by mass: 3-6 wt% of silicon manganese alloy, 3-8 wt% of silicon iron powder, 0.5-2.2 wt% of titanium iron powder, 0.01-0.28 wt% of fluoride, 10-19 wt% of manganese powder, 10-18 wt% of nickel powder, 6-10 wt% of molybdenum iron, 3-8 wt% of chromium powder, and the balance of iron powder and inevitable impurities; and the flux core is 12-18 wt% of total mass of the flux-cored wire. The production process comprises the following steps: all the components of the flux core are positioned on the steel core after uniform mixing in proportion, and are wrapped or wound as wires for drawing and diameter reduction to obtain welding wires with predetermined specifications, so that the metal powder flux-cored wire for 1000 MPa high-strength steel is prepared.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and more specifically relates to a metal powder-type flux-cored welding wire for 1000MPa high-strength steel meeting the requirements of E83C-K4 in GB / T 17493 and its production process. Background technique [0002] Because high-strength steel has the advantages of high impact energy, high fatigue strength, and high formability, in recent years, low-alloy high-strength steel with a tensile strength of 850 MPa or more has been widely used in offshore oil production platforms, military industries, and heavy machinery. There are very few types of high-strength steel flux-cored welding wires that match it, and they almost rely on imports. [0003] Metal powder cored wire has the advantages of fast deposition speed, stable arc, beautiful weld shape and less slag. Therefore, there is an urgent need in the industry to develop a metal powder-type flux-cored wire suitable for 1000MPa high-stre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/0266B23K35/3066B23K35/3605B23K35/368B23K35/406
Inventor 郭栖利毛高军谢玉伦蒋勇曹睿陈剑虹
Owner ATLANTIC CHINA WELDING CONSUMABLES
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