CN108907505A - Q550MPa high-strength steel special welding wire and preparation method - Google Patents
Q550MPa high-strength steel special welding wire and preparation method Download PDFInfo
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- CN108907505A CN108907505A CN201811036084.9A CN201811036084A CN108907505A CN 108907505 A CN108907505 A CN 108907505A CN 201811036084 A CN201811036084 A CN 201811036084A CN 108907505 A CN108907505 A CN 108907505A
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- welding wire
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Classifications
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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
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
-
- 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
Abstract
The invention discloses a kind of Q550MPa high-strength steel special welding wire and preparation method, which is made of crust steel band and medicine core, and medicine core composition and content are：Fluoride 3-5 parts by weight, ferrosilicon powder 8-15 parts by weight, ferro-aluminum powder 2-5 parts by weight, ferromanganese powder 10-15 parts by weight, nickel powder 8-12 parts by weight, potassium titanate 1-5 parts by weight, fused magnesite 2-10 parts by weight, molybdenum-iron 5-15 parts by weight, feldspar powder 2-5 parts by weight, crome metal 10-20 parts by weight, iron powder 20-30 parts by weight.Compared with the existing, welding technological properties of the present invention is good, and arc stability splashes the purpose of small, appearance of weld is beautiful；It matched in intensity, achieve the purpose that good -40 DEG C of low-temperature impact toughness in performance.
Description
Technical field
The present invention relates to field of welding material technology more particularly to a kind of Q550MPa high-strength steel special welding wires, preparation method
And welding method.
Background technique
Q550 steel refers to that yield strength is the high-strength steel of 550MPa.And electro-gas (enclosed) welding is a kind of Automatic Control rising
System is stood vertical or near vertical to butt welding welding with the special flux-cored wire of electro-gas (enclosed) welding, with CO2 gas shield
The welding point of position.Arc axis direction is vertical with weld penetration direction, sliding using water-cooled copper in the front of weld seam when welding
Block, the back side of weld seam is using water cooling shelves row (or liner), and flux-cored wire is sent into the groove that weldment and link stopper are formed, molten bath four sides
It suffers restraints, realizes that single face welding and double face is once-forming, be a kind of efficient welding technology and equipment.Currently, mother used in electro-gas (enclosed) welding
Material is in the majority with the grade of Q345, wlding not matched with Q550.
CN106475706A discloses one kind and exempts from coating bridge steel weather-proof flux-cored wire and preparation method thereof, by steel outside
Skin and medicinal powder core composition, which includes consisting of ingredient：2~8wt% of ferro-boron, 0.01~2wt% of molybdenum-iron, fluoride 1
~6wt%, 1.5~8wt% of zircon sand, 2~7wt% of magnesium powder, 2~5wt% of quartz sand, 2~8wt% of ferrosilicon, electrolytic manganese 5~
19wt%, 1~5wt% of manganese iron, nickel powder 1~6%, 1~8wt% of crome metal, 1~8wt% of copper powder, 2~9wt% of ferrotianium, feldspar
20~40wt% of 0.1~5wt%, 2~8wt% of sodium titanate and rutile, surplus are iron powder.Although it, which is used in, exempts from coating bridge steel
Arc stability when welding, small, the de- slag that splashes are easy, and appearance of weld is beautiful, are suitable for all-position welding, still, when being used for
Q550 high-strength steel is found the welding point that vertical or near vertical position is welded to butt welding with CO2 gas shield, when welding
Inconvenient, the disadvantages of electric arc is unstable, splashing is big, appearance of weld is poor, -40 DEG C of low-temperature impact toughness of postwelding are poor, deposited metal
Diffusible hydrogen content is greater than in 10mL/100g.
Disclosed in CN102581520A it is a kind of with thin layer slag protection high-strength steel welding medication powder equally exist
Drawbacks described above.
Summary of the invention
An object of the present invention, which is that, provides a kind of Q550MPa high-strength steel special welding wire and preparation method, the welding wire
Welding technological properties is good, and arc stability splashes the purpose of small, appearance of weld is beautiful；It matched in intensity, reach good in performance
- 40 DEG C of low-temperature impact toughness purpose.
Technical solution is：A kind of Q550MPa high-strength steel special welding wire and preparation method, the welding wire is by crust steel band and medicine core
Composition, medicine core composition and content are：Fluoride 3-5 parts by weight, ferrosilicon powder 8-15 parts by weight, ferro-aluminum powder 2-5 parts by weight, manganese iron
Powder 10-15 parts by weight, nickel powder 8-12 parts by weight, potassium titanate 1-5 parts by weight, fused magnesite 2-10 parts by weight, molybdenum-iron 5-15 weight
Part, feldspar powder 2-5 parts by weight, crome metal 10-20 parts by weight, iron powder 20-30 parts by weight.
Preferably, the medicine core weight is the 20-30% of welding wire weight.
Preferably, the crust steel band includes following component：0.02%≤C≤0.06%, 0.15%≤Mn≤
0.40%, 0≤Si≤0.05%, 0≤S≤0.010%, 0≤P≤0.010%, surplus are Fe and inevitable impurity.
Preferably, the crust steel band includes following component：C 0.032%, Mn 0.22%, Si 0.02%, S
0.004%, P 0.08%, surplus are Fe and inevitable impurity.
Preferably, 4 parts by weight of fluoride, 10 parts by weight of ferrosilicon powder, 2 parts by weight of ferro-aluminum powder, 12 weight of ferromanganese powder
Part, 10 parts by weight of nickel powder, 3 parts by weight of potassium titanate, 5 parts by weight of fused magnesite, 10 parts by weight of molybdenum-iron, 3 parts by weight of feldspar powder, metal
12 parts by weight of chromium, 29 parts by weight of iron powder.
Preferably, 3 parts by weight of fluoride, 8 parts by weight of ferrosilicon powder, 2 parts by weight of ferro-aluminum powder, 15 weight of ferromanganese powder
Part, 10 parts by weight of nickel powder, 3 parts by weight of potassium titanate, 5 parts by weight of fused magnesite, 10 parts by weight of molybdenum-iron, 3 parts by weight of feldspar powder, metal
20 parts by weight of chromium, 21 parts by weight of iron powder.
Preferably, the diameter of the flux-cored wire is φ 1.60mm.
Preferably, the fluoride is one or more of fluorides such as calcirm-fluoride, potassium fluotitanate, potassium fluoroaluminate；
For welding, welding deposited metal mechanical property is the flux-cored wire：Tensile strength 670-830Mpa, yield strength >=
550Mpa, elongation percentage >=16%, -40 DEG C of impacts reach 80J, and deposited metal diffusible hydrogen content is less than 10mL/100g.
The second object of the present invention is to provide a kind of preparation method of Q550MPa high-strength steel special welding wire.
Technical solution is：A kind of preparation method of Q550MPa high-strength steel special welding wire, includes the following steps：
1. medicine core each component is stand-by after mixing；
2. crust is placed in welding wire molding machine, stand-by medicine core mixture injection is laterally bent into U-typed successively
In crust groove, and then rolls into silk, is pulled to Φ 1.6mm carefully up to Q550MPa high-strength steel special welding wire.
The third object of the present invention is to provide a kind of welding method of Q550MPa high-strength steel.
Technical solution is：A kind of welding method of Q550MPa high-strength steel, the welding method are welded using above-mentioned special welding wire
Connect the Q550MPa high-strength steel electro-gas (enclosed) welding, welding parameter：I=380-400A, U=38-40V, gas flow 20L/min,
100%CO2, heat input：100-235KJ/cm.
Inventive principle and beneficial effect：
The present invention in order to comply with the development in market, successfully develop it is this can welding buckling strength be 550MPa steel plate
Electro-gas (enclosed) welding flux-cored wire.
In the present invention, iron powder can be improved welding efficiency and provide a small amount of oxygen for stabilising arc, in order to guarantee high deposition effect
Rate, iron powder of the present invention are reduced iron powder or atomized iron powder.
The present invention passes through the organic of drug core component and assembles and cooperate to realize the object of the invention with mild-carbon steel strip crust.
Welding wire of the present invention can be used for the welding of 200KJ/cm or more Q550MPa high strength steel plate, deposited metal after welding：Tension
Intensity 670-830Mpa, yield strength >=550Mpa, elongation percentage >=16%, -40 DEG C of impacts reach 80J, deposited metal diffusible hydrogen
Content is less than 10mL/100g.Weld integrity energy is effectively improved, is solved and Q500MPa strength matching and -40 DEG C of low temperature
Impact flexibility problem.Welding technological properties is good, and arc stability, splashing is small, appearance of weld is beautiful.
Definition and explanation
Unless otherwise instructed, which is mass percent to %-.
Unless otherwise instructed, the article used in the present invention is commercial product.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.
Embodiment 1
Crust using the steel band of (width x thickness) 14 × 0.6mm as welding wire, chemical component are C 0.032wt%, Mn
0.22wt%, Si 0.02wt%, S 0.004wt%, P 0.08wt%, surplus are iron and essential impurity element；
Production 100g medicine core is prepared, each ingredient is in medicine core：Fluoride 4g, ferrosilicon powder 10g, ferro-aluminum powder 2g, ferromanganese powder
12g, nickel powder 10g, potassium titanate 3g, fused magnesite 5g, molybdenum-iron 10g, feldspar powder 3g, crome metal 12g, surplus are iron powder.By medicine core
In each ingredient it is stand-by after mixing；
The present embodiment medicine core accounts for the 20wt% of entire welding wire weight.
Steel band is placed in welding wire molding machine, successively by the stand-by lateral steel for being bent into U-typed of medicine core mixture injection
In band groove, and then rolls into silk, is carefully pulled to ￠ 1.6mm.
The present embodiment is in welding parameter：I=380A, U=38V, gas flow 20L/min, 100%CO2, heat input：
100KJ/cm, welding base metal Q550MPa high-strength steel.Its mechanical property is as follows：
Deposited metal composition：%
| C | Mn | Si | S | P | Ni | Mo | Cr |
| 0.06 | 1.90 | 0.45 | 0.006 | 0.011 | 1.50 | 0.50 | 0.20 |
Surplus is Fe and essential impurity element
Deposited metal mechanical performance (100% carbon dioxide gas)：
Diffusible hydrogen content：3.8.0mL/100g
Embodiment 2
The crust of welding wire is same as Example 1.
Production 100g medicine core is prepared, each ingredient is in medicine core：Fluoride 3g, ferrosilicon powder 8g, ferro-aluminum powder 2g, ferromanganese powder 15g,
Nickel powder 10g, potassium titanate 3g, fused magnesite 5g, molybdenum-iron 10g, feldspar powder 3g, crome metal 20g, surplus are iron powder.Then by medicine core
In each ingredient it is stand-by after mixing.
The present embodiment medicine core accounts for the 20wt% of entire welding wire weight.
Steel band is placed in welding wire molding machine, successively by the stand-by lateral steel for being bent into U-typed of medicine core mixture injection
In band groove, and then rolls into silk, is carefully pulled to ￠ 1.6mm.
The present embodiment is in welding parameter：I=400A, U=40V, gas flow 20L/min, 100%CO2, heat input：
235KJ/cm, welding base metal Q550MPa high-strength steel.Its mechanical property is as follows：
Deposited metal composition (%)
| C | Mn | Si | S | P | Ni | Mo | Cr |
| 0.06 | 2.10 | 0.38 | 0.006 | 0.011 | 1.50 | 0.50 | 0.38 |
Surplus is Fe and essential impurity element
Deposited metal mechanical performance (mixed gas)：
Diffusible hydrogen content：4.2mL/100g
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all according to the present patent application
Equivalent changes and modifications made by the scope of the patents, should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of Q550MPa high-strength steel special welding wire, the welding wire are made of crust steel band and medicine core, it is characterised in that the medicine core group
It is at content：Fluoride 3-5 parts by weight, ferrosilicon powder 8-15 parts by weight, ferro-aluminum powder 2-5 parts by weight, ferromanganese powder 10-15 weight
Part, nickel powder 8-12 parts by weight, potassium titanate 1-5 parts by weight, fused magnesite 2-10 parts by weight, molybdenum-iron 5-15 parts by weight, feldspar powder 2-5
Parts by weight, crome metal 10-20 parts by weight, iron powder 20-30 parts by weight.
2. Q550MPa high-strength steel special welding wire according to claim 1, it is characterised in that：The medicine core weight is welding wire
The 20-30% of weight.
3. Q550MPa high-strength steel special welding wire according to claim 1, it is characterised in that the crust steel band includes following
Ingredient：0.02%≤C≤0.06%, 0.15%≤Mn≤0.40%, 0≤Si≤0.05%, 0≤S≤0.010%, 0≤P≤
0.010%, surplus is Fe and inevitable impurity.
4. Q550MPa high-strength steel special welding wire according to claim 3, it is characterised in that the crust steel band includes following
Ingredient：C 0.032%, Mn 0.22%, Si 0.02%, S 0.004%, P 0.08%, surplus be Fe and inevitably it is miscellaneous
Matter.
5. Q550MPa high-strength steel special welding wire according to claim 1 to 4, it is characterised in that：4 weight of fluoride
Measure part, 10 parts by weight of ferrosilicon powder, 2 parts by weight of ferro-aluminum powder, 12 parts by weight of ferromanganese powder, 10 parts by weight of nickel powder, 3 parts by weight of potassium titanate,
5 parts by weight of fused magnesite, 10 parts by weight of molybdenum-iron, 3 parts by weight of feldspar powder, 12 parts by weight of crome metal, 29 parts by weight of iron powder.
6. Q550MPa high-strength steel special welding wire according to claim 1 to 4, it is characterised in that：3 weight of fluoride
Measure part, 8 parts by weight of ferrosilicon powder, 2 parts by weight of ferro-aluminum powder, 15 parts by weight of ferromanganese powder, 10 parts by weight of nickel powder, 3 parts by weight of potassium titanate, electricity
5 parts by weight of fused magnesia, 10 parts by weight of molybdenum-iron, 3 parts by weight of feldspar powder, 20 parts by weight of crome metal, 21 parts by weight of iron powder.
7. -6 any Q550MPa high-strength steel special welding wire according to claim 1, it is characterised in that：The flux-cored wire
Diameter be φ 1.60mm.
8. -8 any Q550MPa high-strength steel special welding wire according to claim 1, it is characterised in that：The fluoride is
One or more of fluorides such as calcirm-fluoride, potassium fluotitanate, potassium fluoroaluminate；The flux-cored wire welds deposition for welding
Metal Mechanic Property is：Tensile strength 670-830Mpa, yield strength >=550Mpa, elongation percentage >=16%, -40 DEG C of impacts reach
80J, deposited metal diffusible hydrogen content are less than 10mL/100g.
9. the preparation method of Q550MPa high-strength steel special welding wire described in a kind of claim 1 to 8 any claim, including
Following steps：
1. medicine core each component is stand-by after mixing；
2. crust is placed in welding wire molding machine, successively by the stand-by lateral crust for being bent into U-typed of medicine core mixture injection
In groove, and then rolls into silk, is pulled to Φ 1.6mm carefully up to Q550MPa high-strength steel special welding wire.
10. a kind of welding method of Q550MPa high-strength steel, the welding method is using any dedicated weldering of claim 1-8
Wire bond connects the Q550MPa high-strength steel electro-gas (enclosed) welding, I=380-400A, U=38-40V, gas flow 20L/min, 100%CO2,
Heat input：100-235KJ/cm.
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| CN201811036084.9A CN108907505B (en) | 2018-09-06 | 2018-09-06 | Special welding wire for Q550MPa high-strength steel and preparation method thereof |
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Cited By (3)
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| CN110508971A (en) * | 2019-09-12 | 2019-11-29 | 天津市永昌焊丝有限公司 | A kind of high-strength and high-ductility metal powder-cored wire |
| CN112548398A (en) * | 2020-12-08 | 2021-03-26 | 上海焊接器材有限公司 | Ultralow-hydrogen flux-cored wire for 62 Kg-grade weathering steel and manufacturing method thereof |
| CN112719691A (en) * | 2020-12-22 | 2021-04-30 | 四川大西洋焊接材料股份有限公司 | Flux-cored wire, flux-cored wire and preparation method and application thereof |
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| CN112548398A (en) * | 2020-12-08 | 2021-03-26 | 上海焊接器材有限公司 | Ultralow-hydrogen flux-cored wire for 62 Kg-grade weathering steel and manufacturing method thereof |
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Address after: 643000 1 Danyang street, artesian well district, Zigong, Sichuan Applicant after: Sichuan Atlantic China Welding Consumables, Inc. Address before: 643000 No. 2 Machongkou Street, Daan District, Zigong City, Sichuan Province Applicant before: Sichuan Atlantic China Welding Consumables, Inc. |
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