CN103692108B - A kind of production technology of boron-containing alloy steel welding wire - Google Patents

A kind of production technology of boron-containing alloy steel welding wire Download PDF

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CN103692108B
CN103692108B CN201310701358.2A CN201310701358A CN103692108B CN 103692108 B CN103692108 B CN 103692108B CN 201310701358 A CN201310701358 A CN 201310701358A CN 103692108 B CN103692108 B CN 103692108B
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boron
containing alloy
welding wire
wire
alloy steel
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CN103692108A (en
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叶长青
王辉
刘艳芳
翟福生
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TANGSHAN HONGPENG WELDING Co Ltd
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TANGSHAN HONGPENG WELDING Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261Rods, electrodes, wires
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/30Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3053Fe as the principal constituent
    • B23K35/3073Fe as the principal constituent with Mn as next major constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40Making wire or rods for soldering or welding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)
  • Metal Extraction Processes (AREA)

Abstract

The present invention relates to a kind of production technology of boron-containing alloy steel welding wire, belong to technical field of welding materials.Technical scheme is processed into by boron-containing alloy steel wire rod, adds boron element, add with block boron in refined molten steel process when alloy smelting steel, guarantee that refining uniform composition is dissolved in molten steel, become boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.06-0.10, Si 0.80-1.00, Mn 1.40-1.60, P≤0.025, S≤0.025, Ni≤0.15, Cr≤0.15, Cu≤0.15, B 0.0010-0.0030.The present invention has the following advantages: better than the molten iron flow of silico-manganese steel welding wire in welding process, weld seam is attractive in appearance; Resistant to rust ability is better than silico-manganese steel welding wire; Improve hardness and the tensile strength of weld(ing) deposit; Improve weld strength rank.

Description

A kind of production technology of boron-containing alloy steel welding wire
Technical field
The present invention relates to a kind of production technology of boron-containing alloy steel welding wire, belong to technical field of welding materials.
Background technology
The welding wire (wire drawing) of background technology selects low-carbon (LC) boiling steel wire rod as raw material with wire rod usually, mainly by the feature that it is surrendered and tensile strength is low, steel is soft, drawing property is good, the also wiredrawing wire rod of the low-carbon (LC) killed steel wire rod of useful continuous casting production, Performance Ratio low-carbon (LC) boiling steel is poorer, steel wire is out of shape the heat of generation in drawing process and steel wire fricative heat between die channel makes the temperature of steel wire rise, and produce strain-aging effect, the twisting property of steel wire is caused sharply to worsen, flexural property degenerates, and breaks increase; Common Low Carbon Steel Wire Rod yield strength is generally at below 500MPa, and industrial pipe adopts boron-containing steel tubing, the yield strength of this welding tubing requires to reach 500-550MPa, even higher, therefore, the mild steel wlding of background technology can not meet the welding requirements of this high-strength steel.
Summary of the invention
The object of the invention is to provide a kind of production technology of boron-containing alloy steel welding wire, produces high-strength steel wlding, has excellent toughness and the yield strength of superelevation, solves the problems referred to above existed in background technology.
Technical scheme of the present invention is:
A kind of boron-containing alloy steel welding wire, is processed into by boron-containing alloy steel wire rod, adds boron element when alloy smelting steel, add in refined molten steel process with block boron, guarantee that refining uniform composition is dissolved in molten steel, become boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.06-0.10, Si 0.80-1.00, Mn 1.40-1.60, P≤0.025, S≤0.025, Ni≤0.15, Cr≤0.15, Cu≤0.15, B 0.0010-0.0030.
The mechanical property of described boron-containing alloy steel wire rod: tensile strength≤570MPa, elongation after fracture >=35.0%, the contraction percentage of area >=70%.
A kind of production technology of boron-containing alloy steel welding wire, comprise boron-containing alloy steel wire rod produce and rough, carefully draw, concentrated chemical copper facing, winding, packaging process, boron-containing alloy steel wire rod through rough, carefully draw, concentrated chemical copper facing, winding, packaging process, its chemical composition is constant, and particular content is as follows:
1. boron-containing alloy steel wire rod is produced, and adds boron element, add with block boron in refined molten steel process when alloy smelting steel, guarantee that refining uniform composition is dissolved in molten steel, become boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.06-0.10, Si 0.80-1.00, Mn 1.40-1.60, P≤0.025, S≤0.025, Ni≤0.15, Cr≤0.15, Cu≤0.15, B 0.0010-0.0030; The mechanical property of boron-containing alloy steel wire rod: tensile strength≤570MPa, elongation after fracture >=35.0%, the contraction percentage of area >=70%;
2. rough operation, comprises material loading, pre-treatment, drawing and take-up; First above-mentioned boron-containing alloy steel wire rod material loading, then carries out pre-treatment; Pre-treatment comprises boron-containing alloy steel wire rod through husking box, more successively through degreasing case, descaling bath, cold rinse bank, hot water storgae, painting boron groove, drying baker; The pickling electric current of descaling bath is not less than 350A, and the concentration of sulfuric acid is not less than 300g/l; Be coated with the boron liquid temp more than 100 DEG C of boron groove, the heavy 16-25Be of boron liquor ratio; Carry out drawing after pre-treatment, the boron-containing alloy steel wire rod of diameter 5.5mm pulls into the welding wire of diameter 2.5mm by drawing production line, finally again with sliding hurdle frame take-up;
3. carefully draw operation, by the welding wire of diameter 2.5mm made through rough operation, carry out drawing through wire drawing tank, the temperature of DI can is not higher than 50 DEG C, and prevent from corroding quickening at high operating temperatures containing boron welding wire, the rigidity of welding wire increases, and reduces toughness; Gage of wire pulls into the welding wire of diameter 0.8mm, 0.9mm, 1.0mm, 1.2mm, 1.6mm respectively by 2.5mm, then enters degreasing water tank, washes welding wire, ensure that wire drawing powder no longer brings take-up into, affect the copper facing of next procedure, last spool spooling, take-up requires that arrangement evenly.
Described concentrated chemical copper facing operation, comprises unwrapping wire, pre-treatment, copper facing, polishing, take-up; Pre-treatment comprises thick alkali, smart alkali, activation, electrolysis, neutralization, cold wash, hot water wash, oven dry; Unwrapping wire adopts initiatively unwrapping wire, and the gage of wire deviation caused when preventing speed uneven is large, and can prevent the fracture of welding wire; In order to increase the activity of boron, the bond (BN) being convenient to boron and nitrogen generates, the nitrogen (N) in fixing steel, the thick alkali electric current of pre-treatment is not less than 300A, temperature is not less than 80 degree, and naoh concentration is 90-160g/l, and concentration of sodium carbonate is 20-60g/l, essence alkali electric current is greater than 250A, naoh concentration 80-150g/l, concentration of sodium carbonate is 30-70g/l, and activated acids concentration is 140-190g/l, Faradaic current is greater than 300A, and sulfuric acid concentration is 220-350g/l; Copper-plated concentration of copper sulfate is 45-80g/l, and sulfuric acid concentration is 55-110g/l, and copper facing, without black hair, does not rise clear; Polishing increases the aesthetic property of welding wire, and ensure that welding wire in use can steady wire feed.
Described winding working procedure, comprises take-up and unwrapping wire, and initiatively unwrapping wire and active take-up are regulated the speed by tensioner, and every layer of radical is consistent, within deviation of weight 1%; Adjustment relaxed diameter is about 890mm, and sticking up distance must not higher than 20mm, and the deposited metal mechanical property tests of finished product welding wire reaches yield strength >=420MPa, tensile strength>=530MPa; Described packaging process, packaging process is pipelining, often coils welding wire and places 2 pieces of drier, wrap up in an anti-tarnish paper, ensure the drying property of welding wire, plastic packaging shrink-packaging, then with external packing carton, ensures cleanliness factor and the aridity of carton.
Beneficial effect of the present invention:
1. welding wire with the addition of boron element in raw-material chemical composition, makes it better than the molten iron flow of silico-manganese steel welding wire in welding process, changes the compactness of the weld metal of silico-manganese steel wlding, improve appearance of weld aesthetics.Because add the alloy branch crystal tissue after boron to start refinement, boron element serves the effect of strong alterant in the alloy.Its metamorphic mechanism is boron is surface active element in nickel alloy, is easily adsorbed on solid-state nucleating surface, the rate thus reduction crystal is grown up.
2. boron-containing alloy steel welding wire resistant to rust ability is stronger than silico-manganese steel welding wire.Contrast in sodium chloride test and draw, the steel alloy welding wire of boracic is better than silico-manganese steel welding wire in corrosion resistance.
3. compared with silico-manganese steel welding wire, the interpolation of boron element, makes alloy structure there occurs change, by original ferrite+pearlite, changes ferrite+pearlite+martensite and a small amount of austenite into.The interpolation of boron element, forms carbon-boron compound and a small amount of retained austenite composition.Know according to alloy phase diagram, the maximum solid solution degree of boron in γ phase is 0.02%, makes unnecessary boron atom be enriched in crystal boundary, forms hard phase boride.Due to the formation of boride, make carbon left in the rising of the relative amount in liquid phase, most of eutectic γ phase in version is a-Fe, and the γ phase do not changed then is present in matrix with the form of retained austenite.Thus improve hardness and the tensile strength that deposited metal is met in weldering.
4. boron-containing alloy steel welding wire can weld the welding that silico-manganese steel welding wire does not reach strength levels necessitate.Such as silico-manganese steel welding wire is applicable to the ordinary low-alloy steel of welding low-carbon steel and below 500MPa, and boron-containing alloy steel welding wire can weld ordinary low-alloy steel, steel alloy, the boron-containing alloy steel of 500MPa-550MPa.
Boron-containing alloy steel welding wire, for high-strength steel welding, has not only characteristically been different from silico-manganese steel welding wire, and can have welded the intensity that silico-manganese steel welding wire do not reach.There is the characteristic of other steel alloys.
Detailed description of the invention
The invention will be further described by the following examples.
Embodiment 1
Boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.064, Mn 1.60, Si 0.85, P 0.015, S 0.008, Cu 0.12, Ni 0.03, Cr 0.05, Mo 0.014, V 0.001, B 0.0013.
Yield strength 430MPa, tensile strength 530MPa.
Embodiment 2
Boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.063, Mn 1.61, Si 0.84, P 0.014, S 0.008, Cu 0.11, Ni0.03, Cr 0.05, Mo 0.015, V 0.001, B 0.0012.
Yield strength 430MPa, tensile strength 535MPa.
Embodiment 3
Boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.063, Mn 1.59, Si 0.84, P 0.013, S 0.008, Cu 0.12, Ni 0.03, Cr 0.05, Mo 0.014, V 0.001, B 0.0012.
Yield strength 430MPa, tensile strength 532MPa.
Experiment proves: boron-containing alloy steel welding wire of the present invention has good yield strength and tensile strength, is applicable to the welding of high-strength steel, and steady quality, be applicable to batch production.
Product of the present invention, detect through national welding material Quality Supervision and Inspection Center, on November 6th, 2013 has provided No13T228 " survey report ", conclusion is: boron joins in welding wire as micro alloying element, improve the tensile strength of welding wire, yield strength, in particular improve low-temperature impact toughness and plasticity, the wearability etc. of welding wire, its technical indicator is better than common silico-manganese steel welding wire, and this boron alloyed steel welding wire can be used for important engineering and special occasions welding.

Claims (3)

1. the production technology of a boron-containing alloy steel welding wire, it is characterized in that comprising boron-containing alloy steel wire rod produce and rough, carefully draw, concentrated chemical copper facing, winding, packaging process, boron-containing alloy steel wire rod through rough, carefully draw, concentrated chemical copper facing, winding, packaging process, its chemical composition is constant, and particular content is as follows:
1. boron-containing alloy steel wire rod is produced, and adds boron element, add with block boron in refined molten steel process when alloy smelting steel, guarantee that refining uniform composition is dissolved in molten steel, become boron-containing alloy steel wire rod, each constituent chemical components mass percent is: C 0.06-0.10, Si 0.80-1.00, Mn 1.40-1.60, P≤0.025, S≤0.025, Ni≤0.15, Cr≤0.15, Cu≤0.15, B 0.0010-0.0030; The mechanical property of boron-containing alloy steel wire rod: tensile strength≤570MPa, elongation after fracture >=35.0%, the contraction percentage of area >=70%;
2. rough operation, comprises material loading, pre-treatment, drawing and take-up; First above-mentioned boron-containing alloy steel wire rod material loading, then carries out pre-treatment; Pre-treatment comprises boron-containing alloy steel wire rod through husking box, more successively through degreasing case, descaling bath, cold rinse bank, hot water storgae, painting boron groove, drying baker; The pickling electric current of descaling bath is not less than 350A, and the concentration of sulfuric acid is not less than 300g/l; Be coated with the boron liquid temp more than 100 DEG C of boron groove, the heavy 16-25Be of boron liquor ratio; Carry out drawing after pre-treatment, the boron-containing alloy steel wire rod of diameter 5.5mm pulls into the welding wire of diameter 2.5mm by drawing production line, finally again with sliding hurdle frame take-up;
3. carefully draw operation, by the welding wire of diameter 2.5mm made through rough operation, carry out drawing through wire drawing tank, the temperature of DI can is not higher than 50 DEG C; Gage of wire pulls into the welding wire of diameter 0.8mm, 0.9mm, 1.0mm, 1.2mm, 1.6mm respectively by 2.5mm, then enters degreasing water tank, washes welding wire, ensures that wire drawing powder no longer brings take-up into, last spool spooling.
2. the production technology of a kind of boron-containing alloy steel welding wire according to claim 1, is characterized in that described concentrated chemical copper facing operation, comprises unwrapping wire, pre-treatment, copper facing, polishing, take-up; Pre-treatment comprises thick alkali, smart alkali, activation, electrolysis, neutralization, cold wash, hot water wash, oven dry; Unwrapping wire adopts initiatively unwrapping wire; In order to increase the activity of boron, the bond (BN) being convenient to boron and nitrogen generates, the nitrogen (N) in fixing steel, the thick alkali electric current of pre-treatment is not less than 300A, temperature is not less than 80 degree, and naoh concentration is 90-160g/l, and concentration of sodium carbonate is 20-60g/l, essence alkali electric current is greater than 250A, naoh concentration 80-150g/l, concentration of sodium carbonate is 30-70g/l, and activated acids concentration is 140-190g/l, Faradaic current is greater than 300A, and sulfuric acid concentration is 220-350g/l; Copper-plated concentration of copper sulfate is 45-80g/l, and sulfuric acid concentration is 55-110g/l; Polishing increases the aesthetic property of welding wire, and ensure that welding wire in use can steady wire feed.
3. a kind of production technology of boron-containing alloy steel welding wire according to claim 1 or 2, is characterized in that described winding working procedure, comprises take-up and unwrapping wire, initiatively unwrapping wire and initiatively take-up regulated the speed by tensioner, every layer of radical is consistent, within deviation of weight 1%; Adjustment relaxed diameter is about 890mm, and sticking up distance must not higher than 20mm, and the deposited metal mechanical property tests of finished product welding wire reaches yield strength >=420MPa, tensile strength>=530MPa; Described packaging process, packaging process is pipelining, often coils welding wire and places 2 pieces of drier, wrap up in an anti-tarnish paper, ensure the drying property of welding wire, plastic packaging shrink-packaging, then with external packing carton, ensures cleanliness factor and the aridity of carton.
CN201310701358.2A 2013-12-19 2013-12-19 A kind of production technology of boron-containing alloy steel welding wire Active CN103692108B (en)

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CN104498818B (en) * 2014-12-22 2016-09-14 首钢水城钢铁(集团)有限责任公司 A kind of ER70S-6 gren rod and preparation method thereof
CN109175610B (en) * 2018-10-11 2021-04-20 南京钢铁股份有限公司 Gas shielded welding method for marine thin plate

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EP0058450A1 (en) * 1981-02-11 1982-08-25 Horst Dr. Mühlberger Iron-based alloy for welding spheroidal graphite cast iron workpieces
CN101234457A (en) * 2008-02-28 2008-08-06 武汉钢铁(集团)公司 High-strength high ductility gas protecting welding stick
CN101524797A (en) * 2009-04-13 2009-09-09 金秋生 Dedicated welding wire of a 70kg high-strength steel plate for mining machinery use only
CN101658983A (en) * 2009-09-15 2010-03-03 武汉科技大学 High-toughness gas protective welding wire for large-linear energy welding low-alloy steel
CN102161139A (en) * 2010-12-13 2011-08-24 首钢总公司 Production method for manufacturing steel wire rod for X80 pipe line steel submerged arc welding wire
CN102922171A (en) * 2012-11-30 2013-02-13 江苏天业合金材料有限公司 Non-preheating and non-copper-plating automatic low-alloy-steel welding wire for ships and production technology of wire
CN103331529A (en) * 2013-06-14 2013-10-02 武汉钢铁(集团)公司 Mixed gas protection welding wire with tensile strength of no less than 1100 MPa and using method thereof

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