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Stranded wire for high-strength steel and preparation process thereof

A preparation process, high-strength steel technology, applied in the direction of manufacturing tools, welding equipment, welding media, etc., can solve the problems of insufficient strength, achieve the effect of not affecting strength and toughness, beautiful shape, and improving impact toughness

Inactive Publication Date: 2020-03-31
河北联之捷焊业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of lightweight technology for car bodies, when the strength of the steel plate is 1000MPa, the heat input to the steel plate during the welding process of the solid welding material is larger than that of the flux-cored wire, and the strength of the steel plate after welding is insufficient. The technology and cost of the flux-cored wire The advantages have been reflected, but the bottleneck restricting the development of flux cored wire is how to improve the toughness and the stability of the welding arc at the same time

Method used

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  • Stranded wire for high-strength steel and preparation process thereof
  • Stranded wire for high-strength steel and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A stranded welding wire for high-strength steel, including a flux core and a sheath covering the outside of the flux core, the weight ratio of the flux core to the sheath is 2.5:10; the flux core includes: graphite powder 4%, nano-titanium dioxide 0.2% , rutile 20%, calcium oxide 2%, tungsten powder 3%, metal chromium 0.8%, sodium fluoride 4.2%, lithium fluoride 0.12%, diyttrium oxide 0.4%, metal manganese 1%, potassium titanate 2%, 4% nickel powder, 2% Ti-Nb-V-Fe alloy, and the balance is iron powder.

[0020] Among them, in the Ti-Nb-V-Fe alloy, the titanium element accounts for 2% by mass, the niobium element accounts for 18% by mass, and the vanadium element accounts for 8% by mass.

[0021] The above-mentioned preparation process of stranded welding wire for high-strength steel is to roll the outer skin into a U-shaped groove, place the drug core in the U-shaped groove, and extrude and roll it into an O-shaped closed tube containing the drug core; The closed tube ...

Embodiment 2

[0023] A stranded welding wire for high-strength steel, including a flux core and a sheath covering the outside of the flux core, the weight ratio of the flux core to the sheath is 3.5:10; the flux core includes: graphite powder 2%, nano-titanium dioxide 1% , rutile 10%, calcium oxide 5%, tungsten powder 1%, metal chromium 1.8%, sodium fluoride 2.5%, lithium fluoride 0.2%, diyttrium oxide 0.1%, metal manganese 2%, potassium titanate 1%, 10% nickel powder, 1.2% Ti-Nb-V-Fe alloy, and the balance is iron powder.

[0024] Among them, in the Ti-Nb-V-Fe alloy, the mass percentage of titanium element is 4%, the mass percentage of niobium element is 14%, and the mass percentage of vanadium element is 12%.

[0025] The above-mentioned preparation process of stranded welding wire for high-strength steel is to roll the outer skin into a U-shaped groove, place the drug core in the U-shaped groove, and extrude and roll it into an O-shaped closed tube containing the drug core; The closed t...

Embodiment 3

[0027] A stranded welding wire for high-strength steel, including a flux core and a sheath covering the outside of the flux core, the weight ratio of the flux core to the sheath is 2.8:10; the flux core includes: graphite powder 3.5%, nano-titanium dioxide 0.4% , rutile 18%, calcium oxide 3%, tungsten powder 2.5%, metal chromium 1%, sodium fluoride 4%, lithium fluoride 0.14%, diyttrium oxide 0.3%, metal manganese 1.3%, potassium titanate 1.6%, 6% nickel powder, 1.8% Ti-Nb-V-Fe alloy, and the balance is iron powder.

[0028] Among them, in the Ti-Nb-V-Fe alloy, the mass percentage of titanium element is 2.5%, the mass percentage of niobium element is 17%, and the mass percentage of vanadium element is 9%.

[0029] The above-mentioned preparation process of stranded welding wire for high-strength steel is to roll the outer skin into a U-shaped groove, place the drug core in the U-shaped groove, and extrude and roll it into an O-shaped closed tube containing the drug core; The c...

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Abstract

The invention discloses a stranded wire for high-strength steel. The stranded wire comprises a medicine core and a sheath coated on the outer side of the medicine core, wherein the medicine core comprises the following components in percentage by weight, 2% to 4% of graphite powder, 0.2% to 1% of nano titanium dioxide, 10% to 20% of Rutile, 2% to 5% of calcium oxide, 1% to 3% of Tungsten Powder, 0.8% to 1.8% of Metal Chromium, 2.5% to 4.2% of sodium fluoride, 0.12% to 0.2% of lithium fluoride, 0.1% to 0.4% of Yttria, 1% to 2% of Metal Manganese, 1% to 2% of potassium titanate, 4% to 10% of Nickel Powder, 1.2% to 2% of Ti-Nb-V-Fe Alloy, and the balance is iron powder. The preparation process comprises the following steps of rolling a sheath into a U-shaped groove, placing the medicine corein the U-shaped groove, and extruding and rolling to form an O-shaped closed tube containing a medicine core; and welding the O-shaped closed tube by contact welding, rolling into a disk, carrying outsurface acidification treatment, carrying out rough drawing, carrying out surface acidification treatment, and carrying out fine drawing, and removing grease to obtain the stranded welding wire for high-strength steel.

Description

technical field [0001] The invention relates to the technical field of flux-cored welding wire, in particular to a stranded welding wire for high-strength steel and a preparation process thereof. Background technique [0002] With the continuous development of my country's heavy-duty vehicle industry, steel is still the main material for the manufacture of heavy-duty vehicles, but its connotation has undergone major changes, from the previous mild steel to high-strength steel plates, combined with advanced steel processing technology , the strength of steel materials continues to increase. While realizing the lightweight of the car body, it also puts forward strict requirements on the matching high-strength and high-toughness welding consumables. [0003] With the development of lightweight technology for the body, when the strength of the steel plate is 1000MPa, the heat input to the steel plate during the welding process of the solid welding consumables is greater than that...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/30B23K35/40
CPCB23K35/0266B23K35/0283B23K35/3053B23K35/40
Inventor 梁裕
Owner 河北联之捷焊业科技有限公司
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