CN106624455A - Ultralow hydrogen high-strength steel welding rod used for welding 100 kg class water-electricity pressure steel pipe and preparing method thereof - Google Patents
Ultralow hydrogen high-strength steel welding rod used for welding 100 kg class water-electricity pressure steel pipe and preparing method thereof Download PDFInfo
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- CN106624455A CN106624455A CN201710169917.8A CN201710169917A CN106624455A CN 106624455 A CN106624455 A CN 106624455A CN 201710169917 A CN201710169917 A CN 201710169917A CN 106624455 A CN106624455 A CN 106624455A
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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
- B23K35/36—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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/404—Coated rods; Coated electrodes
Abstract
The invention discloses an ultralow hydrogen high-strength steel welding rod used for welding a 100 kg class water-electricity pressure steel pipe and a preparing method thereof. The ultralow hydrogen high-strength steel welding rod is used for welding the 100 kg class water-electricity pressure steel pipe under the condition that the thermal input is equal to or larger than 40 KJ/cm, and a weld seam metal with excellent crack resistance and impact toughness is obtained under the low temperature condition of minus 60 DEG C. The welding rod is good in all-positional welding performance, and the diffusion hydrogen content of the welding seam metal is 3.5 ml/100 g or below. (mercury method). The welding bar is prepared from 35%-48% of marble, 3%-7% of magnesite, 2%-6% of barium carbonate, 16%-26% of fluorite, 2%-5% of rutile, 2%-5.5% of zircon quartz, 3.2%-6.8% of electrolytic manganese, 7%-12% of low-silicon silicon iron, 5.4%-9.6% of nickel powder, 2.2%-4.5% of ferromolybdenum, 0.3%-0.9% of chromium metal, and the coating component occupancy rate covers 1.2%-33.5% of the total weight of the welding bar.
Description
Technical field
The present invention relates to welding rod and preparation method thereof, and in particular to a kind of to be used to weld 100kg level hydraulic power pressure steel pipes
Ultralow-hydrogen low high-strength steel welding rod and preparation method thereof.
Background technology
In recent years, with the steel construction such as pressure vessel, hydroelectric generation fabrication constantly to lightweight, maximize send out
Exhibition, especially for mitigation earth CO2Discharge, it then follows the environment principle of " energy-saving and emission-reduction ".The design of high-strength steel construction is used
Significant progress is arrived.As high-strength steel fabrication design strength and toughness deposit are improved, the requirement to welding material is constantly
Propose new technical requirement.
At present, with the continuous renewal of design objective, 80kg level hydraulic power pressures steel pipe is progressively for domestic water conservancy power industry
Instead of 60kg level hydraulic power pressure steel pipes.The application of 100kg penstocks has had been enter into the substantial design phase.With water power
The continuous lifting of penstock intensity rank index, while the toughness deposit of Resistance of Weld Metal it is also proposed higher requirement.It is special
It is not due to operating site space narrow during welding procedure, it is desirable in welding process, expand thermal weld stress (≤40KJ/
), cm improve welding productivity.Therefore, in order to improve weld metal toughness deposit, expand thermal weld stress technique in work progress
Window, proposes new technical requirements to designing and developing for 100kg penstock welding rods.
The content of the invention
The technical problem to be solved is to provide a kind of for welding the ultralow of 100kg level hydraulic power pressure steel pipes
Hydrogen high-strength steel welding rod and preparation method thereof, thermal weld stress satisfaction≤40KJ/cm welding conditions, in use environment temperature -60
Under the conditions of DEG C, weld metal has good mechanical property and cracking resistance.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：It is a kind of to be used to weld 100kg level water power pressures
The ultralow-hydrogen low high-strength steel welding rod of power steel pipe, including core wire and wrap core wire surface coating constitute, core wire be H08E welding rods,
The component and mass percent that electrode coating includes be：Marble 35%～48%, magnesite 3%～7%, brium carbonate 2%
～6%, fluorite 16～26%, rutile 2～5%, zircon English 2～5.5%, electrolytic manganese 3.2～6.8%, low silicon ferrosilicon 7～
12%, nikel powder 5.4%～9.6%, 2.2%～4.5%. of molybdenum-iron crome metals 0.3%～0.9%, rare earth oxide 0.4%～
0.8%.
By mass percentage, it is desirable to：
H08E steel：C≤0.060%, Mn 0.35%～0.60%, Si≤0.030%, S≤0.010%, P≤
0.010%, balance of Fe；
Marble：CaCO3>=98.0%, S≤0.010%, P≤0.010%；
Magnesite：MgO >=41%, CaO≤6.0%, SiO2≤ 2.0%, FeO≤0.4%；
Brium carbonate：BaCO3>=98.5%, SO4 -2≤ 0.40%, moisture content≤0.30%；
Fluorite：CaF2>=95.0%, SiO2≤ 1.5%, CaCO3≤ 1.5%, S≤0.03%, P≤0.03%；
Rutile：TiO2>=95.0%, S≤0.03%, P≤0.03%；
Zircon sand：ZrO2>=60.0%, SiO2≤ 32.0%, Al2O3≤ 1.2%, S≤0.03%, P≤0.03%；
Electrolytic manganese：Mn >=99.7%, C≤0.04%, P≤0.005%, S≤0.02%, Si≤0.010%, Fe≤
0.03%；
Low silicon ferrosilicon：Si 42.0%～47.0%, P≤0.03%, S≤0.02%, Mn≤0.7%；
Nikel powder：Ni >=98.0%, C≤0.025%, S≤0.01%, P≤0.01%；
Molybdenum-iron：Mo >=55.0%, Si≤1.0%, S≤0.05%, P≤0.05%, C≤0.20%, Cu≤0.5%；
Crome metal：Cr >=99.0%, C≤0.02%, P≤0.01%, S≤0.02%, Si≤0.020%, Fe≤
0.20%.
The electrode coating quality accounts for the 31.2%～33.4% of welding rod gross mass.
The above-mentioned preparation method for welding the ultralow-hydrogen low high-strength steel welding rod of 100kg level hydraulic power pressure steel pipes, rutile,
Zircon bakes and banks up with earth process through 850 DEG C～950 DEG C high temperature before suppression electrode, then mixes each medicated powder component of coating by proportioning
Close uniform, using lithium-potassium-sodium form waterglass as binding agent, addition is the 18%-26% of coating gross weight, is stirred,
Suppression electrode, finally carries out low temperature, middle temperature, high temperature and bakes and banks up with earth, make welding rod.
The rutile, zircon are bakeed 30 minutes through 850 DEG C～950 DEG C high temperature before suppression electrode.
50-90 DEG C of the low temperature, middle temperature 90-150 DEG C, 350-400 DEG C of high temperature.
Lithium-potassium-sodium form the waterglass, its concentration are 39～410Be', modulus be 2.9～3.3, proportion be 1.8～
2.2, potassium sodium mass ratio is 3: 1.
The invention has the beneficial effects as follows：Below welding rod thermal weld stress 40KJ/mm is welded, and the diffusible hydrogen content of welding rod exists
Below 3.5ml/100g (mercury process).Under -60 DEG C of cryogenic conditions, the excellent weld seam of crack resistance and impact flexibility can be obtained
Metal, it is adaptable to all-position welding technological operation.
Specific embodiment
The present invention is described in further detail with reference to specific embodiment, following percentage ratios are quality percentage
Than：
A kind of ultralow-hydrogen low high-strength steel welding rod for welding 100kg level hydraulic power pressure steel pipes of the present invention, including core wire and
Wrap the coating on core wire surface to constitute, core wire is H08E welding rods, and the component and mass percent that electrode coating includes be：Greatly
Gypsum Fibrosum 35%～48%, magnesite 3%～7%, brium carbonate 2%～6%, fluorite 16～26%, rutile 2～5%, zircon English
2～5.5%, electrolytic manganese 3.2～6.8%, low silicon ferrosilicon 7～12%, nikel powder 5.4%～9.6%, 2.2%～4.5%. of molybdenum-iron
Crome metal 0.3%～0.9%, rare earth oxide 0.4%～0.8%.
By mass percentage, it is desirable to：
H08E steel：C≤0.060%, Mn 0.35%～0.60%, Si≤0.030%, S≤0.010%, P≤
0.010%, balance of Fe；
Marble：CaCO3>=98.0%, S≤0.010%, P≤0.010%；
Magnesite：MgO >=41%, CaO≤6.0%, SiO2≤ 2.0%, FeO≤0.4%；
Brium carbonate：BaCO3>=98.5%, SO4 -2≤ 0.40%, moisture content≤0.30%；
Fluorite：CaF2>=95.0%, SiO2≤ 1.5%, CaCO3≤ 1.5%, S≤0.03%, P≤0.03%；
Rutile：TiO2>=95.0%, S≤0.03%, P≤0.03%；
Zircon sand：ZrO2>=60.0%, SiO2≤ 32.0%, Al2O3≤ 1.2%, S≤0.03%, P≤0.03%；
Electrolytic manganese：Mn >=99.7%, C≤0.04%, P≤0.005%, S≤0.02%, Si≤0.010%, Fe≤
0.03%；
Low silicon ferrosilicon：Si 42.0%～47.0%, P≤0.03%, S≤0.02%, Mn≤0.7%；
Nikel powder：Ni >=98.0%, C≤0.025%, S≤0.01%, P≤0.01%；
Molybdenum-iron：Mo >=55.0%, Si≤1.0%, S≤0.05%, P≤0.05%, C≤0.20%, Cu≤0.5%；
Crome metal：Cr >=99.0%, C≤0.02%, P≤0.01%, S≤0.02%, Si≤0.020%, Fe≤
0.20%.
The electrode coating quality accounts for the 31.2%～33.4% of welding rod gross mass.
The above-mentioned preparation method for welding the ultralow-hydrogen low high-strength steel welding rod of 100kg level hydraulic power pressure steel pipes, rutile,
Zircon bakes and banks up with earth process through 850 DEG C～950 DEG C high temperature before suppression electrode, then mixes each medicated powder component of coating by proportioning
Close uniform, using lithium-potassium-sodium form waterglass as binding agent, addition is the 18%-26% of coating gross weight, is stirred,
Suppression electrode, finally carries out low temperature, middle temperature, high temperature and bakes and banks up with earth, make welding rod.
The rutile, zircon are bakeed 30 minutes through 850 DEG C～950 DEG C high temperature before suppression electrode.
50-90 DEG C of the low temperature, middle temperature 90-150 DEG C, 350-400 DEG C of high temperature.
Lithium-potassium-sodium form the waterglass, its concentration are 39～410Be', modulus be 2.9～3.3, proportion be 1.8～
2.2, potassium sodium mass ratio is 3: 1.
Described steel core is H08E welding rod core wires, wherein below C≤0.060%.
Described hydrogen controlled electrode coating accounts for the 31.2～33.4% of welding rod gross mass.Coating component is CaO-CaF2-
SiO2-TiO2Slag system, using Mn-Si-Ni-Mo-Cr alloy systems.
The present invention improves carbonic acid in coating component to make weld metal diffusible hydrogen content≤3.5ml/100g (mercury process)
The mass fraction of salt.Carbonate decomposes generation CO in arc atmosphere2By molten bath and air insulated, H in air is prevented2、O2、N
Etc. the erosion of harmful gass Resistance of Weld Metal, the partial pressure of each harmful gass composition in arc atmosphere is reduced.In addition, to silicon
The acidic oxides such as hydrochlorate carry out high temperature pretreatment before suppression electrode, and carbonate accuracy by immutable weight is ensured between 43～62%
Weld metal diffusible hydrogen content is at below 3.5ml/100g (mercury process).
Using Mn-Si-Ni-Mo-Cr alloy systems, the mass percent of Ni, Mo in weld metal is improve, and in coating
With the addition of 0.4～0.8% rare earth oxide in component, control the C content in core wire, promote weld metal formed it is tiny under
Bainite and low C martensites, reduce inclusion morphology in weld metal so as in tiny spherical, Dispersed precipitate, Resistance of Weld Metal
Serve purification.By the enforcement of above measure, under the following welding conditions of weld heat input 40KJ/cm, can still obtain
To satisfied weld metal mechanical property.
Hereinafter coating component effect in the present invention is elaborated：
(1) covering of an electrode component of the present invention adopts CaO-CaF2-SiO2-TiO2Slag system, decomposes temperature containing a large amount of in coating
The different carbonate of degree.Which includes marble, magnesite, brium carbonate etc..Carbonate decomposes life under the conditions of high arc temperature
Into CO2, prevent H in air2、O2, the harmful gass Resistance of Weld Metal such as N erosion, reduce H in arc atmosphere2、O2, N etc. has
The partial pressure of evil gas componant.Simultaneously because CO2Presence improve arc stiffness in welding rod vertical position welding operating process, improve
The operating characteristics of all-position welding.The basic anhydride Resistance of Weld Metal such as CaO, MgO, BaO generated in high-temperature reaction process
Desulfurization serves positive effect.
(2) the fluorite in coating component reduces the fusing point of slag, improves slag fluidity.Fluorite is in high arc temperature ring
F is decomposited under border-Weld metal hydrogen content is significantly reduced, realizes weld metal low hydrogenation.Fluorite content is beyond this
The upper limit in invention, causes slag fluidity too strong, is unfavorable for the operability of vertical position of welding, and declines arc stability.
(3) silicate in coating component, titanate Resistance of Weld Metal molding, reduce splashing, improve the slag removability of slag and play
Good conciliation effect.Below the lower limit that the present invention is limited, then arc stability declines its content, and the removability of slag cannot be good
Good improvement.Easily there is glass dregs tendency beyond upper limit segment slag, and the non-metallic inclusion in weld metal increases, drop
The low low-temperature flexibility of weld metal.
(4) C is the important element for improving weld metal intensity, is found in high-strength steel welding process in the present invention, Ying Yan
C content in lattice control weld metal, in weld metal, C is improved more than more than 0.08 weld metal intensity, low-temperature impact toughness
Downward trend, low-temperature cracks sensitivity are significantly improved.
(5) Mn, Si content improves the intensity in weld metal and deoxidation, while weld metal low temperature can be effectively improved
Toughness, when in coating component, si content is less than lower limit, weld metal deoxidation is not enough, causes non-metallic inclusion in weld metal
Quantity increases, and is unfavorable for the improvement of low-temperature flexibility, and easily produces pore；Work as Mn contents in coating component in addition and exceed the upper limit
When, there is weld metal intensity surplus, while there is low-temperature flexibility downward trend.
Ni, Mo in order to improve weld metal low-temperature flexibility and ensure weld metal yield strength and add, when Ni,
When Mo contents are offline less than 6.5%, weld metal low-temperature flexibility sufficiently cannot improve, and yield strength will less than standard
Ask, Ni, Mo are limited more than the upper limit, then weld metal intensity increases, low-temperature flexibility deteriorates, and ni content is too high in weld metal
Increased the danger of fire check.
(7) quenching degree can be improved when Cr elements are together added with Ni elements, meanwhile, Cr elements can improve weld seam heat resistance.
Cr elements can improve the content of acicular ferrite in weld seam, reduce pro-eutectoid ferrite content, fining ferrite grains, so as to
Improve intensity and toughness.Although Cr has stronger solution strengthening effect, but improves can the brittle transition temperature of steel, reduces weldering
Connecing property.Therefore, in the present invention, Cr contents are controlled in 0.3-0.9%.
Preferably, the compositions of surfacing metal weight is consisted of：
Component that electrode coating includes and mass percent are marble 35%～48%, magnesite 3%～7%, carbon
Sour barium 2%～6%, fluorite 16%～26%, rutile 2%～5%, zircon English 2%～5.5%, electrolytic manganese 3.2%～
6.8%, low silicon ferrosilicon 7%～12%, nikel powder 5.4%～9.6%, molybdenum-iron 2.2%～4.5%, crome metal 0.3%～0.9%,
Rare earth oxide 0.4%～0.8%.
Technical scheme is：Medicated powder each component mix homogeneously of the present invention is taken, using potassium sodium mixing waterglass as binding agent, plus
Enter the 18%-26% that amount is coating gross weight, after stirring, using welding rod industry production special equipment, by the welding rod of regulation
Uniform external diameter is coated on core wire, Jing after being ground out bare terminal end and arc end, using welding rod drying stove point 50-90 DEG C of low temperature, middle temperature
90-150 DEG C, 350-400 DEG C of three phases of high temperature dried, that is, obtain low-temperature steel high tensile steel electrode of the present invention.
Pretreatment：Rutile, zircon are being bakeed 30 minutes through 850 DEG C～950 DEG C high temperature.
Embodiment 1
After above-mentioned medicated powder is uniformly mixed, 39～41 are added0Be' moduluses are that 3.0 3: 1 potassium-sodium water glasses are stirred
Mix, being placed in after mix homogeneously in extrusion press makes which be wrapped on core wire, using welding rod drying stove point 50-90 DEG C of low temperature, middle temperature 90-
150 DEG C, 350-400 DEG C of three phases of high temperature are dried.Gained welding rod epidermis is smooth, and eccentric stable, coating intensity is good, to institute
Obtain welding rod to be welded, shape attractive in appearance, little, the arc stability of splashing.
Mechanical property of the 1 welding rod deposited metal of embodiment under as-welded room temperature：Rm=932, Rel=830, A=17.0 ,-
60 DEG C of ballistic work KV2It is not：76J, 78J, 76J, radiographic inspection are qualified.
Embodiment 2
After above-mentioned medicated powder is uniformly mixed, 39～41 are added0Be' moduluses are that 3.0 3: 1 potassium-sodium water glasses are stirred
Mix, being placed in after mix homogeneously in extrusion press makes which be wrapped on core wire, using welding rod drying stove point 50-90 DEG C of low temperature, middle temperature 90-
150 DEG C, 350-400 DEG C of three phases of high temperature are dried.Gained welding rod epidermis is smooth, and eccentric stable, coating intensity is good, to institute
Obtain welding rod to be welded, shape attractive in appearance, little, the arc stability of splashing.
Mechanical property of the 2 welding rod deposited metal of embodiment under as-welded room temperature：Rm=936, Rel=828, A=17.5 ,-
60 DEG C of ballistic work KV2It is not：82J, 80J, 82J, radiographic inspection are qualified.
Embodiment 3
After above-mentioned medicated powder is uniformly mixed, 39～41 are added0Be' moduluses are that 3.0 3: 1 potassium-sodium water glasses are stirred
Mix, being placed in after mix homogeneously in extrusion press makes which be wrapped on core wire, using welding rod drying stove point 50-90 DEG C of low temperature, middle temperature 90-
150 DEG C, 350-400 DEG C of three phases of high temperature are dried.Gained welding rod epidermis is smooth, and eccentric stable, coating intensity is good, to institute
Obtain welding rod to be welded, shape attractive in appearance, little, the arc stability of splashing.
Mechanical property of the 3 welding rod deposited metal of embodiment under as-welded room temperature：Rm=940, Rel=832, A=19.5 ,-
60 DEG C of ballistic work KV2It is not：90J, 88J, 92J, radiographic inspection are qualified.
Embodiment 4
After above-mentioned medicated powder is uniformly mixed, 39～41 are added0Be' moduluses are that 3.0 3: 1 potassium-sodium water glasses are stirred
Mix, being placed in after mix homogeneously in extrusion press makes which be wrapped on core wire, using welding rod drying stove point 50-90 DEG C of low temperature, middle temperature 90-
150 DEG C, 350-400 DEG C of three phases of high temperature are dried.Gained welding rod epidermis is smooth, and eccentric stable, coating intensity is good, to institute
Obtain welding rod to be welded, shape attractive in appearance, little, the arc stability of splashing.
Mechanical property of the 4 welding rod deposited metal of embodiment under as-welded room temperature：Rm=960, Rel=859, A=16.5 ,-
60 DEG C of ballistic work KV2It is not：70J, 70J, 72J, radiographic inspection are qualified.
Embodiment described above is merely to illustrate the technological thought and feature of the present invention, its object is to make in the art
Technical staff it will be appreciated that present disclosure implementing according to this, it is impossible to the patent model of the present invention is limited only with the present embodiment
Enclose, i.e., equal change or modification that all disclosed spirit is made, still fall in the scope of the claims of the present invention.
Claims (7)
1. a kind of ultralow-hydrogen low high-strength steel welding rod for welding 100kg level hydraulic power pressure steel pipes, including core wire is being welded with wrapping
Wicking surface coating composition, it is characterised in that core wire be H08E welding rods, component and mass percent that electrode coating includes
For：Marble 35%～48%, magnesite 3%～7%, brium carbonate 2%～6%, fluorite 16～26%, rutile 2～5%,
Zircon English 2～5.5%, electrolytic manganese 3.2～6.8%, low silicon ferrosilicon 7～12%, nikel powder 5.4%～9.6%, molybdenum-iron 2.2%～
4.5%. crome metal 0.3%～0.9%, rare earth oxide 0.4%～0.8%.
2. it is used for according to claim 1 welding the ultralow-hydrogen low high-strength steel welding rod of 100kg level hydraulic power pressure steel pipes, its feature
It is, by mass percentage, it is desirable to：
H08E steel：C≤0.060%, Mn 0.35%～0.60%, Si≤0.030%, S≤0.010%, P≤0.010% are remaining
Measure as Fe；
Marble：CaCO3>=98.0%, S≤0.010%, P≤0.010%；
Magnesite：MgO >=41%, CaO≤6.0%, SiO2≤ 2.0%, FeO≤0.4%；
Brium carbonate：BaCO3>=98.5%, SO4 -2≤ 0.40%, moisture content≤0.30%；
Fluorite：CaF2>=95.0%, SiO2≤ 1.5%, CaCO3≤ 1.5%, S≤0.03%, P≤0.03%；
Rutile：TiO2>=95.0%, S≤0.03%, P≤0.03%；
Zircon sand：ZrO2>=60.0%, SiO2≤ 32.0%, Al2O3≤ 1.2%, S≤0.03%, P≤0.03%；
Electrolytic manganese：Mn >=99.7%, C≤0.04%, P≤0.005%, S≤0.02%, Si≤0.010%, Fe≤0.03%；
Low silicon ferrosilicon：Si 42.0%～47.0%, P≤0.03%, S≤0.02%, Mn≤0.7%；
Nikel powder：Ni >=98.0%, C≤0.025%, S≤0.01%, P≤0.01%；
Molybdenum-iron：Mo >=55.0%, Si≤1.0%, S≤0.05%, P≤0.05%, C≤0.20%, Cu≤0.5%；
Crome metal：Cr >=99.0%, C≤0.02%, P≤0.01%, S≤0.02%, Si≤0.020%, Fe≤0.20%.
3. it is used for according to claim 1 welding the ultralow-hydrogen low high-strength steel welding rod of 100kg level hydraulic power pressure steel pipes, its feature
It is that the electrode coating quality accounts for the 31.2%～33.4% of welding rod gross mass.
4. the preparation side of the ultralow-hydrogen low high-strength steel welding rod for being used for as claimed in claim 1 welding 100kg level hydraulic power pressure steel pipes
Method, it is characterised in that rutile, zircon bake and bank up with earth process through 850 DEG C～950 DEG C high temperature before suppression electrode, then by matching somebody with somebody
Than by each medicated powder component mix homogeneously of coating, using lithium-potassium-sodium form waterglass as binding agent, addition is coating gross weight
The 18%-26% of amount, is stirred, suppression electrode, finally carries out low temperature, middle temperature, high temperature and bakes and banks up with earth, makes welding rod.
5. according to claim 4 be used for weld 100kg level hydraulic power pressure steel pipes ultralow-hydrogen low high-strength steel welding rod preparation
Method, it is characterised in that the rutile, zircon are bakeed 30 minutes through 850 DEG C～950 DEG C high temperature before suppression electrode.
6. according to claim 4 be used for weld 100kg level hydraulic power pressure steel pipes ultralow-hydrogen low high-strength steel welding rod preparation
Method, it is characterised in that 50-90 DEG C of the low temperature, middle temperature 90-150 DEG C, 350-400 DEG C of high temperature.
7. according to claim 4 be used for weld 100kg level hydraulic power pressure steel pipes ultralow-hydrogen low high-strength steel welding rod preparation
Method, it is characterised in that the lithium-potassium-sodium form waterglass, its concentration are 39～41 ° of Be', and modulus is 2.9～3.3, and proportion is
1.8～2.2, potassium sodium mass ratio is 3: 1.
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| CN108637519A (en) * | 2018-07-27 | 2018-10-12 | 四川西冶新材料股份有限公司 | A kind of water power 1000MPa grades of mating welding rods of steel and preparation method thereof |
| CN111347190A (en) * | 2018-12-20 | 2020-06-30 | 天津大桥焊材集团有限公司 | Ultralow-hydrogen high-strength steel welding electrode for welding refractory structural steel and preparation method thereof |
| CN112475665A (en) * | 2020-11-06 | 2021-03-12 | 哈尔滨威尔焊接有限责任公司 | Special ultralow-hydrogen welding rod for welding E911 steel high-pressure steam pipeline and preparation method thereof |
| CN112570927A (en) * | 2020-12-03 | 2021-03-30 | 天津大桥龙兴焊接材料有限公司 | Ultralow-hydrogen electrode for welding ultrahigh-strength wear-resistant steel and preparation method thereof |
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| CN112958947A (en) * | 2021-02-08 | 2021-06-15 | 天津市金桥焊材集团股份有限公司 | Sintered flux for improving heat strength of 50 kg-grade fine-grained steel weld joint |
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Application publication date: 20170510 |