CN103753056B - A kind of low-carbon (LC) gas shield welding wire production technology - Google Patents

A kind of low-carbon (LC) gas shield welding wire production technology Download PDF

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CN103753056B
CN103753056B CN201310731644.3A CN201310731644A CN103753056B CN 103753056 B CN103753056 B CN 103753056B CN 201310731644 A CN201310731644 A CN 201310731644A CN 103753056 B CN103753056 B CN 103753056B
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pickling
phosphating
wire rod
parameter
surface treatment
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CN103753056A (en
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徐典伟
吴波
徐龙庆
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Tianjin Iron and Steel Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/38—Electroplating: Baths therefor from solutions of copper
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/06—Wires; Strips; Foils
    • C25D7/0607—Wires

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

A kind of low-carbon (LC) gas shield welding wire production new technique, comprises the steps: the selection of (1) raw material: wire rod composition is C=0.06～0.010%, Si=0.80～1.00%, Mn=1.40～1.60%, P, S≤0.020%, Ca≤0.0015%; (2) surface treatment procedure: 1. pickling process: pickle proportioning is prewashing concentration of hydrochloric acid 5-10%, washes matrix concentration of hydrochloric acid 15～20%, FeCl2≤ 300g/l, pickling time 10～25min, uses high pressure water washing immediately after pickling; 2. phosphatization operation: Phosphating Solution proportioning is Ta total acidity 50～110pt, Fa free acidity 5～20pt, 70～80 DEG C of phosphatization temperatures, phosphating time 1～3min; (3) drawing procedure; (4) copper facing operation. Wire rod surface treatment of the present invention is chemisorbed film, adopt phosphating process at medium temperature and shorter phosphating time, form the phosphating coat of thin layer on wire rod surface, make surface lubricant absorption more even, fine and close, wire rod by surface treatment after under unannealed state direct drawing to product line, than common process cost 50-80 yuan/ton, wire broken rate reduces by 70%, and production efficiency improves 40%.

Description

A kind of low-carbon (LC) gas shield welding wire production technology
Technical field
The invention belongs to gas shield welding wire technical field of producing, particularly a kind of low-carbon (LC) gas shield welding wire production technology.
Background technology
When gas shield welding wire is produced, the surface treatment of raw material (wire rod) is one very important operation, the quality of its qualityTo directly affect welding wire end product quality, output and production cost. Conventional wire rod surface treatment method have mechanical descaling,Line pickling, off-line pickling etc., the drawing of surface spraying borax or direct drawing afterwards, but above several method dish after treatmentBar exists that iron scale is removed thoroughly, Lubrication carrier adheres to the problems such as inhomogeneous, cannot meet high speed drawing requirement, outstandingIt is in the time producing φ 0.8mm and following specification welding wire, and wire broken rate obviously raises, and greatly reduces production efficiency.
Summary of the invention
The present invention provides one can reduce costs and wire broken rate for solving the technical problem existing in known technology, improvesThe low-carbon (LC) gas shield welding wire production technology of production efficiency.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is:
A kind of low-carbon (LC) gas shield welding wire production technology, comprises the steps:
(1) raw material is selected: wire rod composition is counted C=0.06～0.010% with percentage composition, Si=0.80～1.00%,Mn=1.40～1.60%, P, S≤0.020%, Ca≤0.0015%; Tensile strength 510～550MPa, poker fluctuation 30MPaIn, in crowd fluctuation 40MPa, percentage elongation >=25%, reduction of area >=65%; Dimensional discrepancy ± 0.15mm;
(2) surface treatment procedure: pickling process: pickle proportioning is prewashing concentration of hydrochloric acid 5-10%, washes matrix hydrochloric acidConcentration 15～20%, FeCl2≤ 300g/l, pickling time 10～25min, uses high pressure water washing, water PH immediately after pickling>=6, water pressure >=0.6Mpa; Phosphatization operation: Phosphating Solution proportioning is Ta total acidity 50～110pt, Fa free acidity 5～20pt, 70～80 DEG C of phosphatization temperatures, phosphating time 1～3min;
(3) drawing procedure: pre-drawing, adopt two reel single pass drawings, φ 5.5mm～φ 4.70mm, drawing speed 2～3m/s; Rough pulling out, 5 or 6 passages, draft 70%～85%, drawing speed 7～10m/s; Finishing drawing, 4～8 passages,Draft 50%～85%, drawing speed 12～16m/s; Drawing procedure dimensional discrepancy ± 0.02mm.
(4) copper facing operation: first carry out mechanical degreasing, electrolytic alkaline cleaning, cathodic pickling, centre is cold water, hot water punching repeatedlyWash, activation copper facing, dries polishing drawing, finished size deviation ± 0.01mm, ovality deviation≤0.005mm; ElectrolysisAlkali cleaning parameter N aOH100～180g/L, Na2CO330～80g/L, decomposition voltage 8～12V, temperature >=60 DEG C; ElectrolysisPickling Parameter H2SO4120～200g/L，FeSO4< 180g/L, voltage 6～8V; Activation parameter H2SO440～150g/L， FeSO4< 150g/L; Copper facing Parameter H2SO450～100g/L，CuSO460～120g/L，FeSO4<120g/L。
The invention has the beneficial effects as follows: the present invention is emphatically from raw material quality control, wire rod surface treatment and production process of welding wireThree aspects: is started with, and wire rod surface treatment is coated with plated film by physics and changes chemisorbed film into, adopts lower phosphatization temperature and shorter phosphorusThe change time, can be at the phosphating coat of wire rod surface formation thin layer, this film contributes to adhering to of lubricant effectively to alleviate simultaneouslyPhosphate coating is on copper-plated impact, makes surface lubricant absorption more even, fine and close, and wire rod can be not after by surface treatmentUnder annealed condition, direct drawing is to product line, and than common process cost 50-80 yuan/ton, wire broken rate reduces by 70%, rawProduce efficiency and improve 40%.
Brief description of the drawings
Fig. 1 is flow chart of the present invention.
Detailed description of the invention:
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawingBe described in detail as follows:
A kind of low-carbon (LC) gas shield welding wire production technology, comprises the steps:
(1) raw material is selected: for ensureing that raw material has good stable drawing property and welding performance, has carried out strictly itControl, chemical Composition Control narrow range, wire rod composition is counted C=0.06～0.010% with percentage composition, Si=0.80～1.00%,Mn=1.40～1.60%, P, S≤0.020%, for controlling spatter and weldquality, limit Ca content,Ensure Ca≤0.0015%; Wire rod mechanical property is even, stable, tensile strength 510～550MPa, poker fluctuation 30MPaIn, in crowd fluctuation 40MPa, percentage elongation >=25%, reduction of area >=65%; Dimensional discrepancy ± 0.15mm.
(2) surface treatment procedure: pickling process: adopt automation pickler to carry out pickling, pickle proportioning is pre-Desalinization of soil by flooding or leaching acid concentration 5-10%, washes matrix concentration of hydrochloric acid 15～20%, FeCl2≤ 300g/l, pickling time 10～25min, acidAfter washing, use immediately high pressure water washing, water PH >=6, water pressure >=0.6Mpa; Phosphatization operation: adopt automatic phosphating equipment to enterRow surface treatment, Phosphating Solution proportioning is Ta total acidity 50～110pt, Fa free acidity 5～20pt, phosphatization temperature 70～80 DEG C, phosphating time 1～3min. Adopt lower phosphatization temperature and shorter phosphating time, can form one deck on wire rod surface thinThin phosphating coat, this film contributes to adhering to of lubricant effectively to alleviate phosphate coating to copper-plated impact simultaneously.
This operation has fundamentally changed lubricant body adhering mode, is coated with plated film changes chemisorbed film into by physics, makes surface profitLubrication prescription absorption is more even, fine and close.
(3) drawing procedure: finished product welding wire specification φ 1.6mm, φ 1.2mm, φ 1.0mm, φ 0.8mm; Pre-drawing, adoptsWith the drawing of two reel single pass, φ 5.5mm～φ 4.70mm, drawing speed 2～3m/s; Rough pulling out, 5 or 6 passages,Draft 70%～85%, drawing speed 7～10m/s; Finishing drawing, 4～8 passages, draft 50%～85%, drawing speedDegree 12～16m/s; Drawing procedure dimensional discrepancy ± 0.02mm.
(4) copper facing operation: first carry out mechanical degreasing, electrolytic alkaline cleaning, cathodic pickling, centre is cold water, hot water punching repeatedlyWash, activation copper facing, dries polishing drawing, finished size deviation ± 0.01mm, ovality deviation≤0.005mm. ElectrolysisAlkali cleaning parameter N aOH100～180g/L, Na2CO330～80g/L, decomposition voltage 8～12V, temperature >=60 DEG C; ElectrolysisPickling Parameter H2SO4120～200g/L，FeSO4< 180g/L, voltage 6～8V; Activation parameter H2SO440～150g/L，FeSO4< 150g/L; Copper facing Parameter H2SO450～100g/L，CuSO460～120g/L，FeSO4<120g/L。
Embodiment mono-:
Welding wire specification: φ 1.6mm.
(1) raw material is selected: chemical composition is counted C=0.09% with percentage composition, Si=0.95%, and Mn=1.50%, P=0.013,S=0.005%, Ca=0.0012%; Wire rod tensile strength 540MPa, percentage elongation >=37%, reduction of area >=73%; Dimensional discrepancy0.09mm。
(2) surface treatment procedure: pickling process adopts automation pickler to carry out pickling, and pickle proportioning is the pre-desalinization of soil by flooding or leachingAcid concentration 10%, washes matrix concentration of hydrochloric acid 15%, FeCl2200g/l, pickling time 20min. After pickling, use immediately water under high pressureRinse water PH=6.8, water pressure=0.8Mpa; Phosphatization operation adopts automatic phosphating equipment to carry out surface treatment, and Phosphating Solution is joinedThan being Ta total acidity 78pt, Fa free acidity 11pt, 73 DEG C of phosphatization temperatures, phosphating time 2min.
(3) drawing procedure: pre-drawing, adopts two reel single pass drawings, φ 5.5mm～φ 4.70mm, drawing speed3m/s, size 4.71mm; Rough pulling out, φ 4.71mm～φ 2.40mm, 5 passages, total draft 75.1%, drawing speed7m/s, size 2.41mm; Finishing drawing, φ 2.41mm～φ 1.64mm, 4 passages, total draft 53.7%, drawing speed12m/s, size 1.63mm.
(4) copper facing operation: first carry out mechanical degreasing, electrolytic alkaline cleaning, cathodic pickling, centre is cold water, hot water punching repeatedlyWash, activation copper facing, dries polishing drawing, φ 1.64mm～φ 1.60mm, finished size 1.60mm, ovality deviation0.003mm. Electrolytic alkaline cleaning parameter N aOH160g/L, Na2CO365g/L, decomposition voltage 9V, 80 DEG C of temperature; Electrolysis acidWash Parameter H2SO4168g/L，FeSO495g/L, voltage 6V; Activation parameter H2SO492g/L，FeSO470g/L; Copper facingParameter H2SO480g/L，CuSO493g/L，FeSO472g/L。
Embodiment bis-:
Welding wire specification: φ 1.20mm.
(1) raw material is selected: chemical composition is counted C=0.08% with percentage composition, Si=0.90%, and Mn=1.55%, P=0.014,S=0.005%, Ca=0.0010%; Wire rod tensile strength 532MPa, percentage elongation >=36.5%, reduction of area >=75%; Size is inclined to one sidePoor 0.07mm.
(2) surface treatment procedure: pickling process adopts automation pickler to carry out pickling, and pickle proportioning is the pre-desalinization of soil by flooding or leachingAcid concentration 10%, washes matrix concentration of hydrochloric acid 17%, FeCl2≤ 190g/l, pickling time 19min, uses high pressure immediately after picklingWater rinses, water PH=6.8, water pressure=0.8Mpa;
Phosphatization operation adopts automatic phosphating equipment to carry out surface treatment, and Phosphating Solution proportioning is Ta total acidity 76pt, Fa free acidity10pt, 76 DEG C of phosphatization temperatures, phosphating time 2min.
(3) drawing procedure: pre-drawing, adopts two reel single pass drawings, φ 5.5mm～φ 4.70mm, drawing speed3m/s, size 4.70mm; Rough pulling out, φ 4.70mm～φ 2.40mm, 5 passages, total draft 74%, drawing speed8m/s, size 2.39mm; Finishing drawing, φ 2.40mm～φ 1.25mm, 6 passages, total draft 72.9%, drawing speedDegree 14m/s, size 1.23mm.
(4) copper facing operation: first carry out mechanical degreasing, electrolytic alkaline cleaning, cathodic pickling, centre is cold water, hot water punching repeatedlyWash, activation copper facing, dries polishing drawing, φ 1.25mm～φ 1.20mm, finished size 1.20, ovality deviation 0.002mm;Electrolytic alkaline cleaning parameter N aOH155g/L, Na2CO363g/L, decomposition voltage 10V, 85 DEG C of temperature; Cathodic pickling Parameter H2SO4160g/L，FeSO493g/L, voltage 7V; Activation parameter H2SO490g/L，FeSO472g/L; Copper facing Parameter H2SO483g/L，CuSO490g/L，FeSO474g/L。
Embodiment tri-:
Welding wire specification: φ 0.80mm.
(1) raw material is selected: chemical composition is counted C=0.06% with percentage composition, Si=0.80%, and Mn=1.43%, P=0.012,S=0.004%, Ca=0.0012%; Wire rod tensile strength 520MPa, percentage elongation >=38.0%, reduction of area >=78%; Size is inclined to one sideDifference ± 0.10mm.
(2) surface treatment procedure: pickling process adopts automation pickler to carry out pickling, and pickle proportioning is the pre-desalinization of soil by flooding or leachingAcid concentration 8%, washes matrix concentration of hydrochloric acid 20%, FeCl2≤ 210g/l, pickling time 21min, uses high pressure immediately after picklingWater rinses, water PH=6.8, water pressure=0.8Mpa; Phosphatization operation adopts automatic phosphating equipment to carry out surface treatment, Phosphating SolutionProportioning is Ta total acidity 78pt, Fa free acidity 10pt, 75 DEG C of phosphatization temperatures, phosphating time 3min.
(3) drawing procedure: pre-drawing, φ 5.5mm～φ 4.70mm, drawing speed 3m/s, size 4.70mm; RoughPull out φ 4.70mm～φ 2.10mm, 6 passages, total draft 80%, drawing speed 10m/s, size 2.11mm; EssenceDrawing, φ 2.10mm～φ 0.86mm, 8 passages, total draft 83.2%, drawing speed 16m/s, size 0.86mm.
(4) copper facing operation: first carry out mechanical degreasing, electrolytic alkaline cleaning, cathodic pickling, centre is cold water, hot water repeatedlyRinse, activation copper facing, dries, polishing drawing, and φ 0.86mm～φ 0.80mm, finished size 0.80mm, ovality is inclined to one sidePoor 0.002mm; Electrolytic alkaline cleaning parameter N aOH158g/L, Na2CO362g/L, decomposition voltage 10V, temperature >=82 DEG C; ElectricitySeparate pickling Parameter H2SO4151g/L，FeSO493g/L, voltage 7V; Activation parameter H2SO491g/L，FeSO475g/L；Copper facing Parameter H2SO482g/L，CuSO489g/L，FeSO473g/L。
Above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, those of ordinary skill in the fieldShould be appreciated that still and can modify or part technical characterictic is equal to replacement the detailed description of the invention of invention;And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the technology of request protection of the present invention.

Claims (1)

1. a low-carbon (LC) gas shield welding wire production technology, is characterized in that, comprises the steps:
(1) raw material is selected: wire rod composition is counted C=0.06～0.010% with percentage composition, Si=0.80～1.00%, Mn=1.40～1.60%, P, S≤0.020%, Ca≤0.0015%; Tensile strength 510～550MPa, in poker fluctuation 30MPa, in crowd fluctuation 40MPa, percentage elongation >=25%, reduction of area >=65%; Dimensional discrepancy ± 0.15mm;
(2) surface treatment procedure: 1. pickling process: pickle proportioning is prewashing concentration of hydrochloric acid 5-10%, washes matrix concentration of hydrochloric acid 15～20%, FeCl2≤ 300g/l, pickling time 10～25min, uses high pressure water washing, water PH >=6, water pressure >=0.6Mpa immediately after pickling; 2. phosphatization operation: Phosphating Solution proportioning is Ta total acidity 50～110pt, Fa free acidity 5～20pt, 70～80 DEG C of phosphatization temperatures, phosphating time 1～3min;
(3) drawing procedure: pre-drawing, adopts two reel single pass drawings, φ 5.5mm～φ 4.70mm, drawing speed 2～3m/s; Rough pulling out, 5 or 6 passages, draft 70%～85%, drawing speed 7-10m/s; Finishing drawing, 4～8 passages, draft 50%～85%, drawing speed 12～16m/s; Drawing procedure dimensional discrepancy ± 0.02mm;
(4) copper facing operation: first carry out mechanical degreasing, electrolytic alkaline cleaning, cathodic pickling, centre is cold water, hot water injection repeatedly, and activation copper facing, dries polishing drawing, finished size deviation ± 0.01mm, ovality deviation≤0.005mm; Electrolytic alkaline cleaning parameter N aOH100～180g/L, Na2CO330～80g/L, decomposition voltage 8～12V, temperature >=60 DEG C; Cathodic pickling Parameter H2SO4120～200g/L，FeSO4< 180g/L, voltage 6～8V; Activation parameter H2SO440～150g/L，FeSO4< 150g/L; Copper facing Parameter H2SO450～100g/L，CuSO460～120g/L，FeSO4<120g/L。
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