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A basic flux-cored welding wire for high-strength weather-resistant and refractory steel welding

A flux-cored welding wire and weather-resistant technology, which is applied in welding equipment, welding medium, welding equipment, etc., can solve the problems that have not been promoted and the poor process performance of alkaline materials, and achieve arc stability, beautiful shape, and good slag fluidity Effect

Inactive Publication Date: 2021-08-06
CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor process performance of alkaline materials, its application has not been promoted, especially the basic flux-cored welding wires of heat-resistant steel and weather-resistant steel with a tensile strength of 550MPa and above are rarely reported in many literatures and markets.

Method used

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  • A basic flux-cored welding wire for high-strength weather-resistant and refractory steel welding
  • A basic flux-cored welding wire for high-strength weather-resistant and refractory steel welding
  • A basic flux-cored welding wire for high-strength weather-resistant and refractory steel welding

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preparation example Construction

[0036] The preparation method of basic flux-cored welding wire of the present invention is as follows:

[0037] Steel strip: Thickness (mm)×width (mm) of steel strip: 0.6-0.9×10 and related strips, weight ratio between 15-30%; welding wire diameter: Φ1.2mm-Φ1.6mm.

[0038] The production of flux-cored welding wire is a mature technology in the industry. Its principle is: purchase low-carbon steel strips for flux-cored welding wires, use special equipment to roll the thin steel strips into semicircular shapes such as U-shaped, etc., add alloy powder to form welding cores, and roll Sealing is made to form a very long and thin metal tube covered with a welding core, and then rolled or cold drawn to form a finished flux-cored wire with a diameter of Φ1.2mm-Φ1.6mm.

Embodiment 1

[0040] The composition of the flux-cored wire powder in this embodiment is: magnesia: 18g; fluorite: 19g; barium fluoride: 4g; zircon sand: 12g; manganese ore: 2g; rutile: 10g; marble: 3.5g; 2.5g; lithium fluoride 1g; high-carbon ferrochrome 4g; micro-carbon ferrochrome 10.5g; nickel powder 0.4g; ferrosilicon: 2.2g; manganese powder 4.2g; : 1.6g; ferroboron: 0.1g; ferroniobium: 0.4g; ferrovanadium: 0.8g; cerium oxide: 0.1g and yttrium oxide 0.3g.

[0041] Common carbon steel strip H08A is used, with a thickness of 0.8mm and a width of 10mm. The steel strip was rolled into a U shape, and the powders in the above examples were added to the steel strip to form welding cores respectively, with a filling rate of 25%. Rolling and sealing to form a very long and thin metal tube covered with a welding core, and then rolling or cold drawing to form a finished flux-cored wire with a diameter of Φ1.6mm.

Embodiment 2

[0043] The composition of the flux-cored wire powder in this embodiment is: magnesia: 33.4g; fluorite: 5g; barium fluoride: 8g; zircon sand: 6.7g; manganese ore: 6g; rutile: 8.5g; marble: 2g; Alloy: 1g; lithium carbonate 1g; high-carbon ferrochrome 2g; micro-carbon ferrochrome 4.5g; graphite 1g; nickel powder 3.2g; ferrosilicon: 3.6g; manganese powder 7.2g; copper powder: 0.8g; molybdenum powder 2.2g Ferro-titanium: 1.2g; Ferro-boron: 0.3g; Tungsten powder: 0.8g; Ferrovanadium: 0.4g; cerium oxide 1g and yttrium oxide 0.2g.

[0044] Common carbon steel strip H08A is used, with a thickness of 0.8mm and a width of 10mm. The steel strip was rolled into a U shape, and the powders in the above embodiments were added to the steel strip to form welding cores respectively, with a filling rate of 20%. Rolling and sealing to form a very long and thin metal tube covered with a welding core, and then rolling or cold drawing to form a finished flux-cored wire with a diameter of Φ1.6mm.

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Abstract

The invention discloses a high-strength, weather-resistant and fire-resistant alkaline flux-cored welding wire for welding steel. The composition of the flux-cored wire powder in terms of weight percentage is: magnesia: 18%-35%; fluorite: 5%-20%; barium fluoride: 3%-8%; zircon sand: 6%-13% ; Manganite: 1%-7%; Rutile: 5%-12%; Marble: 2%-5%; Aluminum-magnesium alloy: 1%-3%; Sodium fluorosilicate 0-2%; Lithium fluoride 0-1 %; lithium carbonate 0‑1%; high carbon ferrochrome 2%‑5%; micro carbon ferrochrome 0‑12%; copper powder: 0.3%‑4%; nickel powder 0.2%‑16%; ferrosilicon: 1.5% ‑4%; manganese powder 1.8%‑8%; molybdenum powder 1.6%‑5%; ferrotitanium: 1%‑3%; ferroboron: 0.1%‑1%; ferroniobium: 0‑0.5%; ferrovanadium: 0 ‑0.8%; tungsten powder: 0‑2%; rare earth oxides 0.2%‑3.2%; graphite: 0‑1%; the balance is iron powder.

Description

technical field [0001] The invention relates to an alkaline flux-cored welding wire for high-strength weather-resistant and refractory steel welding, which belongs to the field of welding materials. Background technique [0002] With the rapid development of the high-rise building industry, based on the requirements of safety, economy, beautiful appearance, and space utilization, the high performance of structural steel (high strength, high toughness, light weight, corrosion resistance, fire prevention, and environmental protection) and application reduction Quantification is the most effective way to achieve energy saving and consumption reduction in metallurgy and construction industries. Since the 21st century, the development of weathering steel with high strength, toughness and high corrosion resistance has become the goal of steel researchers in many countries. At present, foreign weather-resistant steel is developing towards high strength and high weather resistance,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/12B23K9/16
CPCB23K9/16B23K35/0266B23K35/3053
Inventor 王清宝白波眭向荣张赫
Owner CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP
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