CN102658442A - Low-alloy steel covered arc welding electrode with Cr control capacity and FAC resisting capacity of weld metal of basic slag system - Google Patents

Low-alloy steel covered arc welding electrode with Cr control capacity and FAC resisting capacity of weld metal of basic slag system Download PDF

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CN102658442A
CN102658442A CN2012101399594A CN201210139959A CN102658442A CN 102658442 A CN102658442 A CN 102658442A CN 2012101399594 A CN2012101399594 A CN 2012101399594A CN 201210139959 A CN201210139959 A CN 201210139959A CN 102658442 A CN102658442 A CN 102658442A
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alloy steel
weld metal
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fac
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CN102658442B (en
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陆伟康
吴峥
邱执中
王尧俊
杨光磊
仇陆弟
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China Electric Power Construction Group Equipment Institute Co Ltd
PowerChina SPEM Co Ltd
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SHANGHAI POWER EQUIPMENT MANUFACTURE CO Ltd
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Abstract

The invention relates to a low-alloy steel covered arc welding electrode with Cr control capacity and FAC resisting capacity of a weld metal of a basic slag system. The low-alloy steel covered arc welding electrode comprises a core wire and a coating, wherein the core wire comprises the following components in percent by mass: 0-0.10 percent of C, 1.00-1.60 percent of Mn, 0-0.50 percent of Si, 0.15-0.35 percent of Cr, 0.60-1.20 percent of Ni, 0.15-0.35 percent of Mo, 0-0.007 percent of Ti, 0-0.010 percent of S and 0-0.015 percent of P. The low-alloy steel covered arc welding electrode has better welding process property in a welding process; and a weld has properties such as better strength, impact flexibility and FAC resistance.

Description

A kind of weld metal control Cr of basic slag system and low-alloy steel electrode with anti-FAC ability
Technical field
The present invention relates to a kind of welding material, in particular, relate to a kind of weld metal control Cr of the supporting basic slag system of nuclear power pipeline WB36CN1 steel and low-alloy steel electrode of being used for anti-FAC ability.
Background technology
Along with the high speed development of China's power industry, nuclear power station becomes the pith of electric power development because of advantages such as it is efficient, economy, cleanings.But the steel of nuclear power construction usefulness and welding material be dependence on import always for a long time, has seriously restricted China's nuclear power industrial expansion.For this reason, when the mountain range Australia second phase, nuclear power station conventional island designed, the problem of steel production domesticization is proposed.The steel that are applicable to nuclear power conventional island main steam, main feed water pipe at present domesticize basically (trade mark is WB36CN1).
Because the WB36CN1 steel mainly is used in feedwater piping, the collection case isostructural welding of nuclear power station below 350 ℃.Relatively nuclear power is with steel pipe and the thermoelectricity difference with steel pipe.Can recognize that nuclear power is lower than thermal power station with the pressure and temperature that steel pipe bears in the nuclear power station running, but the flow velocity of its pipeline internal medium (saturated vapor or little superheated steam), flow-rate ratio thermal power station big (about about 1.5 times)." FAC " that generation causes because of the flowing velocity of delivering vapor and water is higher (corrosion of flowing and quickening); Cause oxide-film that inner surface of pipeline has a defencive function to wash away attenuation down or come off, make the corrosion resistance variation of steel matrix a large amount of, swiftly flowing carbonated drink.
In order to improve the ability of nuclear power with steel pipe anti-" FAC ", the expert of this respect is through research both at home and abroad, thinks to add the ability that a certain amount of " Cr " can improve anti-" FAC " in the steel.FAC can be divided into two continuous processes: the production process of oxide/water termination soluble iron ion and the diffusion process that iron ion passes diffusion boundary layer.Because the dissolving of the protective oxide film on the generation heel spare of FAC surface is relevant; When the oxide-film of parts surface enough fine and close, to such an extent as to when transmission course of material can't carry out, FAC just can not take place yet; And under the same case, the density of chromium oxide is greater than iron oxide.
Owing to the WB36CN1 steel is on the basis of WB36 steel, to control the novel steel grade that " Cr " forms, the purpose of control " Cr " is in order to improve the anti-carbonated drink erosion of steel ability, promptly to resist the ability of " FAC ".Also there is not to be directed against specially the welding material of its composition and performance development at present both at home and abroad.
Therefore, should be close with the WB36CN1 steel chemical composition as far as possible in the selection of alloy system as the supporting welding rod PP-J607CrNiMo of WB36CN1 steel.Selected alloying element must satisfy the needs of weld seam metallographic structure and the characteristics of Welding Metallurgy.Be complementary in anti-" FAC " ability to and WB36CN1 steel simultaneously.Promptly carry out the requirement of control " Cr ".
The specification requirements such as chemical composition, mechanical property that the present invention is directed to the WB36CN1 steel make an experiment, study, and develop the low-alloy steel welding rod that a kind of and WB36CN1 rigidity can reach matched well.
Summary of the invention
The purpose of this invention is to provide a kind of weld metal control Cr of basic slag system and the low-alloy steel electrode with anti-FAC ability, this welding rod has good welding technological properties in welding process, and weld seam has performances such as good intensity, impact flexibility and anti-FAC.
In order to realize the purpose of above-mentioned technical problem, the present invention has adopted following technical scheme:
A kind of weld metal control Cr of basic slag system and low-alloy steel electrode with anti-FAC ability, said low-alloy steel electrode is made up of core wire and coating, it is characterized in that: said core wire contains the composition of following quality percentage composition:
C: 0~0.10%,
Mn: 1.00%~1.60%,
Si: 0~0.50%,
Cr: 0.15%~0.35%,
Ni: 0.60%~1.20%,
Mo: 0.15%~0.35%,
Ti: 0~0.007%,
S: 0~0.010%,
P: 0~0.015%;
Surplus is Fe.
In a preferred embodiment of the present invention, said coating is made up of the component of following quality percentage composition:
Marble: 20 ~ 40%,
Fluorite: 15 ~ 25%,
Quartzy: 2 ~ 8%,
Natural rutile: 2 ~ 6%,
Iron powder: 20 ~ 30%,
Manganese metal: 4 ~ 6%,
Ferrosilicon: 4 ~ 6%,
Ferrochrome: 0.5 ~ 1.5%,
Molybdenum-iron: 1 ~ 2%,
Nickel: 1.5 ~ 3.5%.
In a more preferred embodiment of the present invention, said coating is made up of the component of following quality percentage composition:
Marble: 25%,
Fluorite: 25%,
Quartzy: 4%,
Natural rutile: 4%,
Iron powder: 30%,
Manganese metal: 4%,
Ferrosilicon: 3%,
Ferrochrome: 2%,
Molybdenum-iron: 1%,
Nickel: 2%.
In a preferred embodiment of the present invention, the application of said low-alloy steel electrode in the welding of nuclear power pipeline WB36CN1 steel.
The preparation method of low-alloy steel electrode of the present invention comprises step:
(1) said coating component is mixed;
(2) the pure sodium silicate of adding coating component quality 18% ~ 22% stirs the back extrusion on above-mentioned core wire.
(3) mixture with step (2) stirs the back extrusion on above-mentioned core wire, on the welding rod production equipment, carries out the welding rod preparation.
Core wire design considerations of the present invention is following:
Composition C
The maxima solubility of C in γ-Fe is 1.7%, is 0.035% in α-Fe.Belong to and enlarge the γ p-block element p.Play solution strengthening.Too much C will exist with the form of carbide in weld metal.Form precipitation strength, when improving weld strength, hardness, also increased the crack sensitivity of weld metal.So must adopt low-carbon microalloyed mechanism, like this, not only can satisfy the intensity of weld metal but also can reduce the crack sensitivity of weld metal.Planning C content is controlled at below 0.10%.
Composition Mn
The maxima solubility of Mn in γ-Fe is 100%, is 3% in α-Fe.Belong to and enlarge the γ p-block element p.Mn is when content is low in the low-alloy steel weld metal, and generally the form with solution strengthening exists.When improving ferrite intensity, also can improve toughness.Consider the influence of Mn/Si butt welded seam metal impact flexibility, under the prerequisite that satisfies weld metal intensity, Mn content is controlled in 1.0 ~ 1.6% scopes.
Composition Si
The maxima solubility of Si in γ-Fe is 2%, is 18.5% in α-Fe.Belong to and enlarge the α p-block element p.Si is when content is low in the low-alloy steel weld seam, and generally the form with solution strengthening exists, and improves ferritic intensity.Too much Si content will form intermetallic compound, reduce the impact flexibility of weld metal.Consider the influence of Mn/Si butt welded seam metal impact flexibility, under the prerequisite that satisfies weld metal intensity, Si content is controlled at≤0.5% scope in.
Composition Cr
The maxima solubility of Cr in γ-Fe is 12.8%, is 100% in α-Fe.Belong to and enlarge the α p-block element p.Cr generally plays solution strengthening when content is low in the low-alloy steel weld seam.Form carbide together the time with C.Quantity reduces the impact flexibility of weld metal more for a long time.Proper C r also can improve the toughness of weld metal simultaneously in the ferritic intensity of raising.In order to reach matched well at aspect of performance, improve the ability of anti-" FAC " with the WB36CN1 steel.Confirm that Cr content is consistent with the control range of steel, promptly in 0.15 ~ 0.35% scope.
Composition Ni
The maxima solubility of Ni in γ-Fe is 100%, is 10% in α-Fe.Belong to and enlarge the γ p-block element p.Generally play the solution strengthening effect.The toughness that an amount of Ni can improve ferrite matrix forms with the promotion acicular ferrite, helps improving the weld metal cold-crack resistance and can and improve low-temperature impact toughness.Under the prerequisite that satisfies weld metal intensity, Ni content is controlled in 0.6 ~ 1.2% the scope.
Composition Mo
The maxima solubility of Mo in γ-Fe is 3%, is 37.5% in α-Fe.Belong to and enlarge the α p-block element p.Generally play the precipitation strength effect.When coexisting, form Mo with C 2C, the elevated temperature strength of raising weld metal.Excessive Mo will damage the toughness of weld metal, under the prerequisite that satisfies the weld metal elevated temperature strength, Mo content will be controlled in 0.15 ~ 0.35% the scope.
Composition Ti
The maxima solubility of Ti in γ-Fe is 0.75%, is 6% in α-Fe.Belong to and enlarge the α p-block element p.Generally play the precipitation strength effect.Its tendency that forms carbide, nitride is extremely strong.Comprehensive domestic and international research achievement, the favourable influence of Ti butt welded seam metal impact flexibility is: 1. with weld metal in N combine, reduced the illeffects of solid solution nitrogen; 2. generate TiN as crystallization nuclei, promote that weld seam becomes fine grain structure; 3. play deoxidation, reduced the oxygen content in the weld seam.The adverse effect of Ti butt welded seam metal impact flexibility is: 1. Ti reinforced ferrite matrix, improve hardness; 2. Ti can separate out TiC and TiN more for a long time on crystal boundary; 3. Ti rises γ → α phase transition temperature, as it is more to contain the Ti amount, Mn, when Mo contains quantity not sufficient, is prone to form thick ferrite or desmachyme, also martensitic structure possibly occur.Weigh the advantages and disadvantages, confirm in PP-J607CrNiMo welding rod, not add Ti.Ti content in the weld metal is controlled at≤0.007% scope in.
Composition S
S is the objectionable impurities in the weld metal, and is the most harmful when existing with the FeS form.Therefore because it and iron can infinitely dissolve each other when liquid state, and are dissolved in solid iron seldom (solubility is merely 0.015 ~ 0.02%), FeS separates out when solidifying, and is distributed in crystal boundary with the form of low melting point eutectic film, forms solidification cracking.Reduce the impact flexibility of weld metal simultaneously.So the S content in the weld metal is few more good more.According to welding rod with actual conditions former, auxiliary material, confirm S content is controlled at≤0.010% scope in.
Composition P
P is an objectionable impurities in most low-alloy steel weld metals.With Fe 2P, Fe 3The form of P exists, and they and Fe, Ni form low melting point eutectic and be distributed in crystal boundary, because they are own hard and crisp, when reducing weld metal impact flexibility, the weld metal brittle transition temperature are also raise.So the P content in the weld metal is few more good more.According to welding rod with actual conditions former, auxiliary material, confirm P content is controlled at≤0.015% scope in.
Composition Nb
The maxima solubility of Nb in γ-Fe is 2.2%, is 1.8% in α-Fe.Belong to and enlarge the α p-block element p.Generally play the precipitation strength effect, and strengthening effect is remarkable.But Nb produces adverse influence to the toughness of low-alloy steel weld metal.To cause Mn-Si be the decline significantly of weld metal toughness to the precipitation-hardening of separating out of Nb.Therefore in the PP-J607CrNiMo welding rod, do not add Nb.And substitute the intensity that satisfies weld metal with other alloying element.
Coating of the present invention, employing be the higher low hydrogen type of basicity, this is that the molten bath is clear because the alloy transfer efficiency of the type coating is bigger; Weld seam has good intensity, toughness and cracking resistance, and diffusible hydrogen content is low, and the decontamination ability is strong.Utilize control Cr technology, can make weld metal have good anti-FAC performance, can satisfy the requirement in the nuclear power pipeline welding well on the whole.The main effect of each component is summarized as follows in this electrode coating:
Marble
Marble (CaCO 3) as CaO-SiO 2-CaF 2Slag former that slag system is main and gas-forming agent
Figure BDA00001614190600041
Bigger to the influence of welding metallurgical reaction.Decompose the CO that produces 2Belong to oxidizing gas, can get rid of the air in the arc region, stop nitrogen to be invaded in the liquid metal, and reduce the hydrogen dividing potential drop in the arc atmosphere, help weld metal and fall hydrogen.Decompose the CaO that produces and belong to basic anhydride.Can improve the basicity of slag, strengthen taking off S, taking off the P ability of slag.But with also increasing the surface tension of slag and the interfacial tension between slag and the deposite metal, alligatoring molten drop.At CaO-SO 2-CaF 2In the slag system, along with marmorean content increases, CO in the gas phase 2Dividing potential drop also increase, higher oxidation potential in the gas phase is unfavorable for the transition of alloying element.Too much CaO has then improved the setting temperature of slag, increases the viscosity of slag.Welding technological properties is degenerated.Through overtesting and comprehensive favourable and unfavorable factor, confirm that marmorean addition is in 20 ~ 40% scopes.
Fluorite
Fluorite (CaF 2) at CaO-SiO 2-CaF 2Being mainly used in slag making in the slag system and improving the physical and chemical performance of slag. it can reduce fusing point, viscosity and the table tension force of basic clinker, increases the flowability of slag.Help reducing the gaseous impurity of weld metal, proper C aF 2Can improve the protection effect of slag, thereby also can reduce the hydrogen of liquid metals liquid metals.But at CaCO 3Content one timing, CaF 2When addition is too much,, make the molten drop diameter in the welding process increase the increase of splashing with the stability that influences welding arc.Short circuit duration increases, and the electrode coating meltdown property degenerates, the covering performance variation of slag butt welded seam metal.Therefore according to CaCO 3/ CaF 2Optimum ratio, consider CaF simultaneously 2To the welding technological properties influence factor, the addition of confirming fluorite is in 15 ~ 25% scope.
Quartzy
Quartzy (SiO 2) at CaO-SiO 2-CaF 2A main fluxing effect in the slag system.It can be used for adjusting the physical and chemical performance of slag, reduces the surface tension of slag, improves the weld metal shaping surface, improves arc voltage, and the refinement molten drop improves the welding rod fusing coefficient.But when addition is too much, reduce the basicity of slag, make the Welding Metallurgy performance depreciation, be unfavorable for obtaining the weld metal of good mechanical performance.Through overtesting and comprehensive favourable and unfavorable factor, confirm that quartzy addition is in 2 ~ 8% scopes.
Natural rutile
Natural rutile (TiO 2) have stabilising arc and fluxing effect, can adjust fusing point, viscosity, surface tension and the flowability of slag.An amount of TiO 2Help all-position welding, improve appearance of weld, reduce and splash and undercut, and improve the removability of slag to a great extent.At CaO-SiO 2-CaF 2In the slag system, TiO 2Physical property be similar to CaO.Too much TiO 2With the fusing point that improves slag, dwindle the solidification temperature range of slag.Hinder the mobilization between slag and the liquid metal, influence fully carrying out of metallurgical reaction, internal gas effusion resistance in molten bath is increased, defective such as be prone to the formation pore, be mingled with.Through overtesting and comprehensive favourable and unfavorable factor, the addition of confirming natural rutile is in 2 ~ 6% scopes.
Iron powder
At CaO-SiO 2-CaF 2Add an amount of iron powder (FHT40.30 I) in the welding rod prescription of slag system, have the reduction bath temperature, increase crystallization rate, help obtaining the fine grain seam organization.Simultaneously also can improve the deposition efficiency of welding rod, and improve welding technological properties.Result of the test shows, the addition of iron powder can change in the scope of broad and the welding technological properties of welding rod is not had obvious influence.But the quality of iron powder, especially granularity, pine dress ratio and oxygen content influence very big to the welding technological properties of welding rod and the mechanical property of weld metal.Select improper even the generation weld porosity.Therefore must carry out choose reasonable and use.The addition of iron powder is controlled in 20 ~ 30% scopes.
Manganese metal
Test shows that using mid-carbon fe-mn in the prescription is beneficial to improving welding technological properties than using manganese metal (Mn), but because mid-carbon fe-mn P content too high (about 0.2%).Can not satisfy control to P content.And manganese metal P content low (about 0.05%) helps the control of P in the weld metal.So select manganese metal for use and without mid-carbon fe-mn in the prescription.
Mn is at CaO-SiO 2-CaF 2Main deoxidation and the alloying action of rising in the welding rod prescription of slag system.Product after the Mn deoxidation is MnO, belongs to basic anhydride, and the basicity that it improves slag plays slag making simultaneously.Through overtesting, the addition of manganese metal can satisfy the control requirement of Mn content in the table 1 at 4 ~ 6% o'clock.
Ferrosilicon
In PP-J607CrNiMo low-alloy steel electrode prescription, not adding ferrotianium (Fe-Ti), is because ferrotianium can ooze Ti in weld metal when carrying out deoxidation, is unfavorable for the control of the Ti content in the weld metal.And in prescription, select to add ferrosilicon (Fe-Si), then can effectively control the Ti content in the weld metal.
Ferrosilicon is at CaO-SiO 2-CaF 2Main deoxidation and the alloying action of rising in the welding rod prescription of slag system.Product after the Si deoxidation is SiO 2, belonging to acidic oxide, the activity of FeO plays fluxing effect simultaneously in basicity of its reduction slag and the slag.Through overtesting, the addition of ferrosilicon can satisfy the control requirement of Si content in the table 1 at 4 ~ 6% o'clock.
Ferrochrome
Through overtesting, the addition of ferrochrome (Fe-Cr) can satisfy the control requirement of Cr content in the table 1 at 0.5 ~ 1.5% o'clock.Molybdenum-iron
Through overtesting, the addition of molybdenum-iron (Fe-Mo) can satisfy the control requirement of Mo content in the table 1 at 1 ~ 2% o'clock.
Nickel
Through overtesting, the addition of nickel (Ni) can satisfy the control requirement of Ni content in the table 1 at 1.5 ~ 3.5% o'clock.
Technical scheme principle of the present invention is: whether the welding rod that is related to whether reasonable in design of welding rod coating recipe has good welding technological properties, stable Welding Metallurgy process, satisfied weld metal mechanical property; Weld metal is except having good anti-" FAC " ability; Also must possess good plasticity, toughness, crack resistance and good low-temperature impact toughness, welding rod must possess good all-position welding processing performance simultaneously.In order to satisfy the requirement of weld metal mechanical property and welding technological properties, various welding slags are analyzed, screened, confirm CaO-SiO 2-CaF 2Slag system is a basic slag system of the present invention, and it is the low-alloy high-strength steel covered are welding electrode that is complementary with the WB36CN1 steel.
Through adopting technique scheme, welding technological properties of the present invention is good, arc stability in the welding process, basically do not have splash, the removability of slag is good, the molten bath is clear, appearance of weld is attractive in appearance, the welding rod operating characteristics is good; Have excellent performances such as deposited metal intensity, impact flexibility and anti-FAC.
The specific embodiment
Below in conjunction with embodiment the present invention is done further detailed description.
Embodiment 1
The component of coating and quality percentage composition thereof are following: marble: fluorite 35%: 15%, quartz 4%, natural rutile 4%, iron powder: manganese metal 30%: ferrosilicon 4%: ferrochrome 4%: molybdenum-iron 1%: nickel 1%: 2%.
After above-mentioned coating raw material are mixed; With 40 purpose sieve below 40 orders; Add the pure sodium silicate that accounts for solid constituent mass content 20% after dry powder stirs, after stirring again, its extrusion is prepared welding rod on above-mentioned core wire through conventional welding rod production equipment.The welding rod smooth surface of producing, yield rate be high, without acceptance of persons.The deposited metal composition of welding rod detected: C:0.058%, Mn:1.61%, Si:0.32%, Cr:0.25%, Ni:0.98%, Mo:0.29%, S:0.006%, P:0.010%, Ti≤0.007%.
Ambient temperature mechanical properties R m: 715MPa, R E1: 575MPa;-50 ℃ of average KV 2: 74J.
Embodiment 2
The mass fraction of each component of coating is following: marble: fluorite 30%: 20%, quartz 4%, natural rutile 4%, iron powder: manganese metal 30%: ferrosilicon 4%: ferrochrome 4%: molybdenum-iron 1%: nickel 1%: 2%.
The preparation method of welding rod is identical with embodiment 1, and the welding rod smooth surface of producing, yield rate be high, without acceptance of persons.To the deposited metal composition of welding rod detect C:0.052%, Mn:1.51%, Si:0.31%, Cr:0.26%, Ni:1.04%, Mo:0.29%, S:0.005%, P:0.010%, Ti≤0.007%.
Ambient temperature mechanical properties R m: 680MPa, R E1: 570MPa;-50 ℃ of average KV 2: 80J.
Embodiment 3
The mass fraction of each component of coating is following: marble: fluorite 25%: 25%, quartz 4%, natural rutile 4%, iron powder: manganese metal 30%: ferrosilicon 4%: ferrochrome 3%: molybdenum-iron 2%: nickel 1%: 2%.
The preparation method of welding rod is identical with embodiment 1, and the welding rod smooth surface of producing, yield rate be high, without acceptance of persons.To the deposited metal composition of welding rod detect C:0.057%, Mn:1.54%, Si:0.39%, Cr:0.28%, Ni:0.96%, Mo:0.30%, S:0.008%, P:0.010%, Ti≤0.007%.
Ambient temperature mechanical properties R m: 720MPa, R E1: 575MPa;-50 ℃ of average KV 2: 66J.
The external similar welding rod deposited metal composition of certain import: C:0.056%, Mn:1.48%, Si:0.31%, Cr:0.04%, Ni:0.76%, Mo:0.38%, S:0.007%, P:0.008%, Ti≤0.007%.
Ambient temperature mechanical properties R m: 635MPa, R E1: 525MPa;-50 ℃ of average KV 2: 73J.
Embodiment 2 gained welding rods when welding arc stability, basically do not have splash, deslag performance is good, welding rod operating characteristics excellence; Appearance of weld is attractive in appearance, and the welding bead height is moderate.Compare with external certain similar welding rod, mechanical property is higher, has mobile more excellent characteristic, and has better anti-FAC performance.

Claims (5)

1. the weld metal control Cr low-alloy steel electrode of a basic slag system, said low-alloy steel electrode is by core wire and coating group
Become, it is characterized in that said core wire contains the composition of following quality percentage composition:
C: 0~0.10%,
Mn: 1.00%~1.60%,
Si: 0~0.50%,
Cr: 0.15%~0.35%,
Ni: 0.60%~1.20%,
Mo: 0.15%~0.35%,
Ti: 0~0.007%,
S: 0~0.010%,
P: 0~0.015%;
Surplus is Fe.
2. low-alloy steel electrode according to claim 1 is characterized in that, said coating is made up of the component of following quality percentage composition:
Marble: 20 ~ 40%,
Fluorite: 15 ~ 25%,
Quartzy: 2 ~ 8%,
Natural rutile: 2 ~ 6%,
Iron powder: 20 ~ 30%,
Manganese metal: 4 ~ 6%,
Ferrosilicon: 4 ~ 6%,
Ferrochrome: 0.5 ~ 1.5%,
Molybdenum-iron: 1 ~ 2%,
Nickel: 1.5 ~ 3.5%.
3. low-alloy steel electrode according to claim 2 is characterized in that, said coating is made up of the component of following quality percentage composition:
Marble: 25%,
Fluorite: 25%,
Quartzy: 4%,
Natural rutile: 4%,
Iron powder: 30%,
Manganese metal: 4%,
Ferrosilicon: 3%,
Ferrochrome: 2%,
Molybdenum-iron: 1%,
Nickel: 2%.
4. the application of any described low-alloy steel electrode of claim 1-3 in the welding of nuclear power pipeline WB36CN1 steel.
5. the preparation method of any described low-alloy steel electrode of claim 1-3 is characterized in that the method comprising the steps of:
(1) said coating component is mixed;
(2) the pure sodium silicate of adding coating component mass content 18% ~ 22%,
(3) mixture with step (2) stirs the back extrusion on above-mentioned core wire, on the welding rod production equipment, carries out the welding rod preparation.
CN201210139959.4A 2012-05-08 2012-05-08 Low-alloy steel welding electrode with Cr control capacity and FAC resisting capacity of weld metal of basic slag system Expired - Fee Related CN102658442B (en)

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CN106624444A (en) * 2016-12-06 2017-05-10 攀枝花学院 High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof
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CN111037152A (en) * 2019-12-27 2020-04-21 中国第一重型机械集团大连加氢反应器制造有限公司 Welding rod matched with steel for 3Ni-1.6Cr-0.5Mo nuclear power equipment and preparation method thereof

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CN103170763B (en) * 2013-01-23 2015-06-17 中广核工程有限公司 Welding rod special for nuclear power 20-control chrome steel
CN103170763A (en) * 2013-01-23 2013-06-26 中广核工程有限公司 Welding rod special for nuclear power 20-control chrome steel
CN103878501A (en) * 2013-11-29 2014-06-25 中国船舶重工集团公司第七二五研究所 Metal-cored seamless flux-cored wire for high-strength steel
CN103862201A (en) * 2014-03-04 2014-06-18 中国船舶重工集团公司第七二五研究所 Welding electrode for Ni steel welding
CN105108373B (en) * 2015-06-09 2017-12-29 中广核工程有限公司 Nuclear power station main steam line Site Welding welding rod special for special
CN105108373A (en) * 2015-06-09 2015-12-02 中广核工程有限公司 Special welding rod for on-site welding main steam pipe in nuclear power station
CN104889607A (en) * 2015-06-15 2015-09-09 赵兰 Copper clad welding rod and manufacturing method thereof
CN105290645A (en) * 2015-10-30 2016-02-03 武汉铁锚焊接材料股份有限公司 Electrode for high-strength steel welding and preparation method and application thereof
CN105290645B (en) * 2015-10-30 2018-03-16 武汉铁锚焊接材料股份有限公司 A kind of welding rod for high-strength steel welding and its preparation method and application
CN105689918A (en) * 2016-03-23 2016-06-22 中国电建集团上海能源装备有限公司 Welding core and coating of rare earth treated 830 MPa grade low-alloy, high-strength and high-toughness basic electrode and preparation method thereof
CN106425170A (en) * 2016-12-06 2017-02-22 攀枝花学院 Low-hydrogen type iron-powder electrode and preparation method thereof
CN106624444A (en) * 2016-12-06 2017-05-10 攀枝花学院 High-deposition-rate and low-hydrogen type iron powder electrode and preparation method thereof
CN106624444B (en) * 2016-12-06 2019-02-22 攀枝花学院 High deposition rate low hydrogen type iron powder electrode and preparation method thereof
CN106425170B (en) * 2016-12-06 2019-03-19 攀枝花学院 A kind of low hydrogen type iron powder electrode and preparation method thereof
CN108274149A (en) * 2017-12-15 2018-07-13 武汉铁锚焊接材料股份有限公司 A kind of 20 control chromium steel welding rods of nuclear power
CN111037152A (en) * 2019-12-27 2020-04-21 中国第一重型机械集团大连加氢反应器制造有限公司 Welding rod matched with steel for 3Ni-1.6Cr-0.5Mo nuclear power equipment and preparation method thereof

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