CN103737199A - Ultra supercritical heat-resistant steel welding rod and production method thereof - Google Patents

Ultra supercritical heat-resistant steel welding rod and production method thereof Download PDF

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Publication number
CN103737199A
CN103737199A CN201310672947.2A CN201310672947A CN103737199A CN 103737199 A CN103737199 A CN 103737199A CN 201310672947 A CN201310672947 A CN 201310672947A CN 103737199 A CN103737199 A CN 103737199A
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ferro
welding rod
ultra supercritical
powder
core wire
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Inventor
何秀
陈维富
黄义芳
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SICHUAN ATLANTIC CHINA WELDING CONSUMABLES Inc
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SICHUAN ATLANTIC CHINA WELDING CONSUMABLES Inc
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Priority to CN201310672947.2A priority Critical patent/CN103737199A/en
Publication of CN103737199A publication Critical patent/CN103737199A/en
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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
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0266—Rods, electrodes, wires flux-cored
    • 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
    • B23K35/3073—Fe as the principal constituent with Mn 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
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • 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
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3602—Carbonates, basic oxides or hydroxides
    • 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
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3603—Halide salts
    • B23K35/3605—Fluorides
    • 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
    • B23K35/404—Coated rods; Coated electrodes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses an ultra supercritical heat-resistant steel welding rod which is composed of an H08A core wire and coating wrapping the surface of the core wire, wherein contents of sulfur, phosphorus, arsenic, aluminum and the like in the H08A core wire are low, and the coating comprises components of 30%-39% of marbles, 22%-30% of fluorites, 6%-9% of rutiles, 7.5%-8.6% of ferromolybdenum, 29%-31% of chromium metal, 5%-9% of silica powder, 2%-5% of ferrosilicon, 1%-1.8% of ferrovanadium, 0.4%-0.8% of ferroniobium, 1.8%-2.8% of nickel powder, 0.4%-0.8% of sodium carbonate, 0.4%-0.8% of carboxyl methyl cellulose (CMC), 0.2%-0.6% of amorphous graphite, 0.6%-1.5% of nitrogen-bearing ferrochromium, 1.6%-3% of electrolytic manganese, 3%-3.8% of cobalt powder and 4%-5% of ferroboron.

Description

A kind of ultra supercritical heat resisting steel welding rod and production method thereof
Technical field
The present invention relates to a kind of welding rod, particularly a kind of ultra supercritical heat resisting steel welding rod and production method thereof.
Background technology
In order to improve the thermal efficiency, reduce CO 2discharge capacity, the requirement that conforms protection and save the energy, the various energy-saving and environmental protection products such as ultra-supercritical boiler, recirculating fluidized bed are all being greatly developed in countries in the world, and China is no exception.In developed country, power station unit is substantially to large capacity and high parameter future development, take reduce energy consumption, the raising thermal efficiency is object, the ultra supercritical unit of high capacity highly effective rate is in succession produced and puts into operation; Through constantly improving development, the availability of ultra supercritical unit, flexibility and operational reliability have all reached quite high level.
Ultra supercritical technology Ye Shi China thermoelectricity is realized the inevitable approach of low-carbon (LC) electric power.From 2003, China generating equipment manufacturing enterprise and foreign-made business cooperated, and introduced large and super-critical fired power generating unit technology.Shanghai, Harbin and east San great power group have introduced supercritical technology from Siemens, Mitsubishi and Hitachi, Ltd etc. respectively.By the end of the year 2010, at the 1000MW ultra supercritical unit moving, reached 33, Chinese having become has the country that ultra supercritical unit is maximum in the world, is also that ultra supercritical wlding consumes big country.
The supporting welding rod of ultra supercritical on existing market, on the one hand high from external introduction cost, the cycle is long, exists in various degree arc stability poor during welding rod welding on the other hand, blow force of arc is little, and spatter is large, and welding bead is narrow, the disadvantages such as appearance of weld is poor, and deslag performance is bad.And be difficult to make welding technological properties and mechanical performance to reach best simultaneously.The invention of this welding rod has solved above difficult point, not only has good processing performance, and has good 100,000 hours creep rupture strengths and high temperature creep property.
Summary of the invention
For above-mentioned weak point, one of object of the present invention is just to provide a kind of ultra supercritical heat resisting steel welding rod, this ultra supercritical heat resisting steel welding rod is supporting for welding ultra supercritical heat resisting steel CB2/FB2, arc stability during welding, splash less, good, the full position operation of the removability of slag is good, appearance of weld is attractive in appearance, weld seam wellability is moderate.
Technical scheme is: a kind of ultra supercritical heat resisting steel welding rod, and the H08A core wire low by sulphur phosphorus arsenic aluminium equal size forms with wrapping in the coating on core wire surface, and described coating component is:
Marble: 30～39%;
Fluorite: 22～30%;
Rutile: 6～9%;
Molybdenum-iron: 7.5～8.6%,
Crome metal: 29～31%,
Silicon powder: 5～9%;
Ferrosilicon: 2～5%;
Vanadium iron: 1～1.8%;
Ferro-niobium: 0.4～0.8%;
Nickel powder: 1.8～2.8%;
Soda ash: 0.4～0.8%;
CMC：0.4～0.8%；
Amorphous graphite: 0.2～0.6%;
Nitrided ferro-chromium: 0.6～1.5%;
Electrolytic manganese: 1.6～3%;
Cobalt powder: 3～3.8%;
Ferro-boron: 4～5%.
As preferably, described H08A core wire chemical composition mass percent is:
C:≤0.05%；
Mn:0.30-0.60%；
Si:≤0.15%；
S:≤0.006%；
P:≤0.006%；
Cr:?≤0.20%；
Ni:≤0.20%；
Mo:?≤0.20%；
Nb:≤0.07%；
N:≤0.07%；
Al:≤0.025%；
Cu:≤0.10%；
As:≤0.006%；
Surplus is Fe.
As preferably, described compositions of surfacing metal consists of:
Marble: 30%, fluorite: 30%, rutile: 7%, molybdenum-iron: 8.0%, crome metal: 30%, silicon powder: 5%, ferrosilicon: 4%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.3%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 0.9%, electrolytic manganese: 2.2%, cobalt powder: 3.3%, ferro-boron: 4.5%.
As preferably, described compositions of surfacing metal is:
Marble: 36%, fluorite: 25%, rutile: 6%, molybdenum-iron: 8.0%, crome metal: 29.6%, silicon powder: 5%, ferrosilicon: 4.6%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.2%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 1.0%, electrolytic manganese: 2.2%, cobalt powder: 3.4%, ferro-boron: 4.3%.
As preferably, described compositions of surfacing metal is:
Marble: 40%, fluorite: 22%, rutile: 6%, molybdenum-iron: 7.5%, crome metal: 30%, silicon powder: 5%, ferrosilicon: 4.4%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.3%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 0.8%, electrolytic manganese: 2.2%, cobalt powder: 3.5%, ferro-boron: 4.6%.
Two of object of the present invention is to provide a kind of production method of above-mentioned ultra supercritical heat resisting steel welding rod.
Technical scheme is: a kind of production method of manufacturing above-mentioned ultra supercritical heat resisting steel welding rod, the step adopting is: after each composition of described coating is mixed, adding weight is that 18～25% binding agent of coating weight stirs again, then send in plodder and be wrapped on described core wire, then bake and bank up with earth with 350～380 ℃ of high temperature and bake and bank up with earth through 80～100 ℃ of low temperature.
As preferably, described binding agent is sodium silicate, KP1 or potassium-sodium water glass.
Inventive principle of the present invention:
Binding agent is sodium silicate or KP1 or potassium-sodium water glass.
CaCO 3be marmorean chief component composition, the marble using in welding rod, under the effect of arc heat, resolves into CaO and CO 2gas, plays the effect of slag making and gas making, and CaO is basic anhydride, can improve slag basicity, and stable arc increases interfacial tension and the surface tension of slag and metal surface, improves deslag performance, and has preferably de-S ability, CO 2can reduce the hydrogen dividing potential drop in arc atmosphere, reduce weld hydrogen content.But CaCO 3too many meeting alligatoring molten drop, so be controlled at 28～40% by marble in the present invention.
CaF 2being the Main Ingredients and Appearance of fluorite, is a kind of polygene mineral matter, belongs to alkaline fluoride, is that a kind of slag former, diluent also can play dehydrogenation effect, CaF in welding rod 2under welding arc effect, ionize out F -, can reduce the dividing potential drop of hydrogen in arc atmosphere, have and carbonate facics with effect.CaF 2resolution reduce the content of oxygen in deposited metal, be conducive to improve the low-temperature impact toughness of weld metal, CaF 2fusing point is lower, can effectively reduce cinder high-temperature viscosity, improves slag fluidity, and improves electric conductivity, improves appearance of weld, and to improving welding procedure, improving deposited metal mechanical performance has very large effect, reasonably CaF 2content can play the effect of stable arc, if CaF 2too high arc stability variation, slag hardening.In this invention, evidence CaF 2there is better effects 18～28% time.
Rutile is purer titanium dioxide, TiO 2be acidic oxide, can improve the physical property of slag, long slag is become to short slag, make slag variation with temperature fast, make appearance of weld good, improve the removability of slag, adding fashionable overall control 5～10%.
Cr makes in steel higher containing Cr amount on the one hand, easily forms Cr 2o 3oxide-film, makes material have good anti-normal temperature, high temperature oxidation resistance, improves decay resistance; Can form M on the other hand 23c 6type carbide, in matrix, play good carbide reinforced effect, play solution strengthening effect, increasing Cr content can make creep fracture time lengthen, but delta ferrite is easy to residual, suitably control the content of Cr, make Creq≤10(Creq=Cr+6Si+4Mo+1.5W+11V+5Nb+9Ti+12Al-40C-30N-4Ni-2Mn-1Cu), there will not be δ-Fe, be conducive to obtain single martensitic structure.In order to match with T/P91 mother metal and to obtain good mechanical performance, in the present invention, deposited metal Cr content is controlled to 8.50～10.50%.
Ni adds the impact flexibility that is conducive to improve weld seam, is mainly the Ac that Ni can reduce material 1temperature, improves the extent of reaction of tissue to tempering, reduces the sensitiveness that delta ferrite forms simultaneously.According to data introduction: have a γ-α to change in Fe-Cr-Nb-Ni system, because the matrix containing Ni alloy is to change by γ-α the granular ferrite forming, in temperature, raise until 600 ℃ time, the intensity of alloy depends on the subgrain structure of ferrite matrix strongly, in the situation that Nb content is identical, containing Ni alloy ratio, containing Ni, do not present higher intensity.Yet having surpassed mother metal set upper limit, nickel element and manganese element content can improve significantly its toughness, because they are to Ac 1the impact of temperature, must consider to limit its content again.In the present invention, Ni is controlled to 1～1.8%.
The acting body of N is now both ways: play on the one hand solution strengthening effect, but under normal temperature, the solubility of nitrogen in steel is very little; On the other hand, in heat treatment process, priority is occurred to V (C, N) separates out and play dispersion-strengtherning, greatly improved creep rupture strength value, but can reduce its plasticity and toughness.In the present invention, nitrided ferro-chromium is controlled to 0.6～1.5%.
Mo is mainly solution strengthening, also participates in forming precipitation strength, can significantly improve creep limit and the stress-rupture strength limit of steel, and Mo can also make recrystallization temperature significantly raise, and the recovery temperature after distortion is significantly improved; And the temperature range of 450 ℃～650 ℃, can effectively suppress the gathering of cementite, and promote the alloy carbide of disperse to separate out, but add Mo too much, can strengthen the brittle failure of steel.In the present invention, deposited metal Mo content is controlled to 0.30～0.70%.
Nb is carbide, can form stable carbide NbC, this carbide is very stable, it can improve creep limit and the creep rupture strength of steel, effect that particularly V and Nb are compound while adding is more obvious, and to improve the heat resistance of steel be owing to forming stable carbide NbC and Laves (NbFe to Nb in addition 2), dispersion-strengtherning is better.But along with the increase of Nb content can cause the reduction of percentage elongation, this is due to NbFe 2volume ratio increase and cause, too high Nb content significantly reduces the toughness of weld metal.Take into account creep rupture strength and impact flexibility.In the present invention, Nb-Fe is controlled to 0.4～0.8%.
Even if the carbide that V forms in heat resisting steel under higher operating temperature, is also relatively difficult to assemble, this has just improved the heat resistance of steel, and adding of V can obviously reduce creep speed.The compound V of adding, Nb easily form the stable MX carbide of very thin disperse and produce precipitation strength (the most effective with 0.25%V-0.05%Nb combination), very large on creep rupture strength impact, and welding performance (fire check) and toughness are had to adverse effect, so their content must be controlled in the lower scope of standard permission.In the present invention, V-Fe is controlled to 1～1.8%.
Mn, Si add as deoxidier, and for avoiding again forming austenite at the highest post weld heat treatment temperature, in weld metal, Mn+Si should be controlled at the scope that is limited to 1.5%.When Si and Cr exist simultaneously, can carry heavy alloyed high-temperature oxidation resistance, but the too high toughness that is unfavorable for weld metal of Si.In the present invention, Si-Fe is controlled to 2～5%, electrolytic manganese is controlled to 1.5～3%.
C a kind ofly can effectively control delta ferrite forming element, adds C can make the intensity of steel improve, Plasticity Decreasing in steel.For guaranteeing welding processing, carbon content remains on a lower level.In the present invention, amorphous graphite is controlled to 0.2～0.6%.
In addition, in order to meet the removability of slag, deoxidation, appearance of weld and the good requirements such as mechanical performance of weld seam, the present invention has selected Si, Mn combined deoxidation, and adding of manganese can improve intensity and toughness, also be a kind of good desulfurizing agent, adding of Ca also has good effect to dephosphorization, and in welding rod, each composition Proper Match, has played good effect to the mechanical performance of weld structure and weld seam.
Beneficial effect of the present invention is: the external supporting welding rod of corresponding ultra supercritical heat resisting steel of introducing, exists the disadvantages such as arc stability is poor, and blow force of arc is little, and spatter is large, and welding bead is narrow, and appearance of weld is poor, and deslag performance is bad in various degree during welding.And be difficult to make welding technological properties and mechanical performance to reach best simultaneously.Welding rod of the present invention has solved above difficult point, not only has good processing performance, and has good plasticity and toughness.
The present invention is to each composition Proper Match in welding rod to obtaining full martensitic structure (hardly containing delta ferrite) after being quenched in weld(ing) deposit, through quench-temper, microscopic structure is the tempered sorbite of Mo solution strengthening, and matrix contains the M that tempering is separated out 23c 6the V that metalloid carbide (Fe, the carbide of Cr or Mo) and MX form exist and carbon/nitride of Nb, M 2x and Laves phase, in welding rod, each composition Proper Match has played good action to improving the mechanical performance of weld structure and weld seam, obtains the weld metal of good high temperature creep property and 100,000 hours creep rupture strengths.For the production of its Weld Performance of heat resisting steel be: welding point tensile strength 720～790Mpa, yield strength 560～630Mpa, percentage elongation 17～20%, 20 ℃ of Impact energy Ak v >=40J, and after welding, weld porosity, slag inclusion, crackle, diffusible hydrogen and outward appearance edge etc. all meet the requirement of ultra supercritical heat resisting steel properties of weld completely.
While adopting the welding rod welding CB2/FB2 heat resisting steel of the present invention's protection; by using reasonable welding procedure and Technology for Heating Processing; can make chemical composition and the tissue of weld metal reach best; there is the mechanical performance index such as rational hot strength (764MPa), impact value (51J, 55J, 63J, 51J, 42J), and after welding, weld porosity, slag inclusion, crackle, diffusible hydrogen and outward appearance edge etc. all meet the requirement of ultra supercritical heat resisting steel properties of weld completely.
The specific embodiment
Below in conjunction with the specific embodiment, the present invention is described in further detail:
embodiment 1
The skin of getting it filled, each component of coating and mass fraction thereof are as follows: marble: 30%, fluorite: 30%, rutile: 7%, molybdenum-iron: 8.0%, crome metal: 30%, silicon powder: 5%, ferrosilicon: 4%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.3%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 0.9%, electrolytic manganese: 2.2%, cobalt powder: 3.3%, ferro-boron: 4.5%.
Get core wire, core wire is selected the low H08A core wire of sulphur phosphorus arsenic aluminium equal size, and chemical composition mass percent is: C :≤0.05%; Mn:0.30-0.60%; Si :≤0.15%; S :≤0.006%; P :≤0.006%; Cr :≤0.20%; Ni :≤0.20%; Mo :≤0.20%; Nb :≤0.07%; N :≤0.07%; Al :≤0.025%; Cu :≤0.10%; As :≤0.006%; Surplus is Fe.
After each component of coating raw material is mixed, add 42～44 ° of Be ＂ d potassium-sodium water glasses that account for solid constituent mass content 18～25%, prepare coating lotion, together with core wire, with common process, on welding rod production equipment, carry out welding rod preparation.
According to the welding rod of above-mentioned explained hereafter, smooth surface, yield rate is high, bias is stable, and arc stability during welding, the removability of slag are good, and welding rod operating characteristics is excellent, appearance of weld is attractive in appearance, bead height is moderate, and weld seam wellability is moderate, and deposited metal mechanical property is: Rm=736 MPa, Rp0.2=652 MPa, A4=21%, (20 ℃) KV2=44～58J, intensity, plasticity are moderate.
embodiment 2
The skin of getting it filled, each component of coating and mass fraction thereof are as follows: marble: 36%, fluorite: 25%, rutile: 76%, molybdenum-iron: 8.0%, crome metal: 29.6%, silicon powder: 5%, ferrosilicon: 4.6%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.2%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 1.0%, electrolytic manganese: 2.2%, cobalt powder: 3.4%, ferro-boron: 4.3%.
Get core wire, core wire is selected the low H08A core wire of sulphur phosphorus arsenic aluminium equal size, and chemical composition mass percent is: C :≤0.05%; Mn:0.30-0.60%; Si :≤0.15%; S :≤0.006%; P :≤0.006%; Cr :≤0.20%; Ni :≤0.20%; Mo :≤0.20%; Nb :≤0.07%; N :≤0.07%; Al :≤0.025%; Cu :≤0.10%; As :≤0.006%; Surplus is Fe.
After each component of coating raw material is mixed, add 42～44 ° of Be ＂ d potassium-sodium water glasses that account for solid constituent mass content 18～25%, prepare coating lotion, with together with the core wire of above-mentioned selection, with common process, on welding rod production equipment, carry out welding rod preparation.
According to the welding rod of above-mentioned explained hereafter, smooth surface, yield rate is high, bias is stable, and arc stability during welding, the removability of slag are good, and welding rod operating characteristics is excellent, appearance of weld is attractive in appearance, bead height is moderate, and weld seam wellability is moderate, and deposited metal mechanical property is: Rm=750 MPa, Rp0.2=660 MPa, A4=19%, (20 ℃) KV2=38～56J, intensity, plasticity are moderate.
embodiment 3
The skin of getting it filled, each component of coating and mass fraction thereof are as follows: marble: 40%, fluorite: 22%, rutile: 6%, molybdenum-iron: 7.5%, crome metal: 30%, silicon powder: 5%, ferrosilicon: 4.4%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.3%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 0.8%, electrolytic manganese: 2.2%, cobalt powder: 3.5%, ferro-boron: 4.6%.
Get core wire, core wire is selected the low H08A core wire of sulphur phosphorus arsenic aluminium equal size, and chemical composition mass percent is: C :≤0.05%; Mn:0.30-0.60%; Si :≤0.15%; S :≤0.006%; P :≤0.006%; Cr :≤0.20%; Ni :≤0.20%; Mo :≤0.20%; Nb :≤0.07%; N :≤0.07%; Al :≤0.025%; Cu :≤0.10%; As :≤0.006%; Surplus is Fe.
After each component of coating raw material is mixed, add 42～44 ° of Be ＂ d potassium-sodium water glasses that account for solid constituent mass content 18～25%, prepare coating lotion, with together with the core wire of above-mentioned selection, with common process, on welding rod production equipment, carry out welding rod preparation.
According to the welding rod of above-mentioned explained hereafter, smooth surface, yield rate is high, bias is stable, and arc stability during welding, the removability of slag are good, and welding rod operating characteristics is excellent, appearance of weld is attractive in appearance, bead height is moderate, and weld seam wellability is moderate, and deposited metal mechanical property is: Rm=776 MPa, Rp0.2=672 MPa, A4=19%, (20 ℃) KV2=46～55J, intensity, plasticity are moderate.
In a word, the foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to the covering scope of patent of the present invention.

Claims (7)

1. the novel jessop welding rod of ultra supercritical, by the low H08A core wire of sulphur phosphorus arsenic aluminium equal size with wrap in the coating on core wire surface and form, is characterized in that: described coating component and mass content thereof are:
Marble: 30～39%;
Fluorite: 22～30%;
Rutile: 6～9%;
Molybdenum-iron: 7.5～8.6%,
Crome metal: 29～31%,
Silicon powder: 5～9%;
Ferrosilicon: 2～5%;
Vanadium iron: 1～1.8%;
Ferro-niobium: 0.4～0.8%;
Nickel powder: 1.8～2.8%;
Soda ash: 0.4～0.8%;
CMC：0.4～0.8%；
Amorphous graphite: 0.2～0.6%;
Nitrided ferro-chromium: 0.6～1.5%;
Electrolytic manganese: 1.6～3%;
Cobalt powder: 3～3.8%;
Ferro-boron: 4～5%.
2. the novel jessop welding rod of ultra supercritical according to claim 1, is characterized in that described core wire chemical composition mass percent is:
C:≤0.05%；
Mn:0.30-0.60%；
Si:≤0.15%；
S:≤0.006%；
P:≤0.006%；
Cr:?≤0.20%；
Ni:≤0.20%；
Mo:?≤0.20%；
Nb:≤0.07%；
N:≤0.07%；
Al:≤0.025%；
Cu:≤0.10%；
As:≤0.006%；
Surplus is Fe.
3. the novel jessop welding rod of ultra supercritical according to claim 1 and 2, is characterized in that described compositions of surfacing metal mass ratio is:
Marble: 30%, fluorite: 30%, rutile: 7%, molybdenum-iron: 8.0%, crome metal: 30%, silicon powder: 5%, ferrosilicon: 4%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.3%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 0.9%, electrolytic manganese: 2.2%, cobalt powder: 3.3%, ferro-boron: 4.5%.
4. the novel jessop welding rod of ultra supercritical according to claim 1 and 2, is characterized in that described compositions of surfacing metal mass ratio is:
Marble: 36%, fluorite: 25%, rutile: 6%, molybdenum-iron: 8.0%, crome metal: 29.6%, silicon powder: 5%, ferrosilicon: 4.6%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.2%, soda ash: 0.6%,
CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 1.0%, electrolytic manganese: 2.2%, cobalt powder: 3.4%, ferro-boron: 4.3%.
5. the novel jessop welding rod of ultra supercritical according to claim 1 and 2, is characterized in that described compositions of surfacing metal is:
Marble: 40%, fluorite: 22%, rutile: 6%, molybdenum-iron: 7.5%, crome metal: 30%, silicon powder: 5%, ferrosilicon: 4.4%, vanadium iron: 1.5%, ferro-niobium 0.6%, nickel powder: 2.3%, soda ash: 0.6%, CMC:0.6%, amorphous graphite: 0.3%, nitrided ferro-chromium: 0.8%, electrolytic manganese: 2.2%, cobalt powder: 3.5%, ferro-boron: 4.6%.
6. a production method of manufacturing the novel jessop welding rod of ultra supercritical described in above-mentioned arbitrary claim, it is characterized in that: the step adopting is, after each composition of described coating is mixed, adding weight is that 18～25% binding agent of coating weight stirs again, then send in plodder and be wrapped on described core wire, then bake and bank up with earth with 350～380 ℃ of high temperature and bake and bank up with earth through 80～100 ℃ of low temperature.
7. the production method of the novel jessop welding rod of ultra supercritical according to claim 6, is characterized in that: described binding agent is sodium silicate, KP1 or potassium-sodium water glass.
CN201310672947.2A 2013-12-12 2013-12-12 Ultra supercritical heat-resistant steel welding rod and production method thereof Pending CN103737199A (en)

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CN112496597A (en) * 2021-02-05 2021-03-16 四川西冶新材料股份有限公司 High-strength high-toughness coating of hydrogen-resistant steel, welding rod and preparation method of welding rod
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