CN106238965B - A kind of 9Ni steel welding sintered flux and preparation method thereof - Google Patents
A kind of 9Ni steel welding sintered flux and preparation method thereof Download PDFInfo
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- CN106238965B CN106238965B CN201610777221.9A CN201610777221A CN106238965B CN 106238965 B CN106238965 B CN 106238965B CN 201610777221 A CN201610777221 A CN 201610777221A CN 106238965 B CN106238965 B CN 106238965B
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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
- B23K35/36—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
- B23K35/40—Making wire or rods for soldering or welding
Abstract
A kind of 9Ni steel welding sintered flux, is related to technical field of welding materials, counts in parts by weight, consisting of：CaF2：20 ~ 28 parts, MgO：23 ~ 33 parts, Al2O3：15 ~ 18 parts, CaO：8 ~ 12 parts, SiO2：4 ~ 10 parts, BaO：0.5 ~ 2 part, TiO：0.5 ~ 2 part, ZrO2：0.5 ~ 2 part, alloy：0.5 ~ 2.5 part, waterglass：15 ~ 20 parts；The alloy is the combination of Antaciron, manganese-silicon or both.Above-mentioned each component is mixed by the present invention according to the ratio, be granulated after, through 300 ~ 400 DEG C of low temperature dryings, then through 660 ~ 750 DEG C of high temperature sinterings, obtain solder flux finished product.The solder flux of the present invention coordinates with solid welding wire ERNiCrMo 4, and welding usability is preferable, and weld properties are good, and deposited metal ultralow-temperature flexibility is stable, excellent, and heat resistanceheat resistant crack sensitivity is good, is suitable for the downhand welding of 9Ni steel submerged arcs, horizontal position welding.
Description
Technical field
The present invention relates to technical field of welding materials, and in particular to a kind of 9Ni steel welding sintered flux and its preparation side
Method.
Background technology
With the rapid economic development in our country, since the rapid of On shore Oil Development falls sharply, offshore and gas development has become
The hot spot of China's energy development.Natural gas is increasingly taken seriously as a kind of clean energy resource, in recent years LNG（Liquefied natural gas）
Project flourishes, currently, domestic planning has multiple LNG projects, 9Ni steel is with its excellent low-temperature flexibility and good weldering
Manufacture the excellent material of low-temperature pressure container when connecing property is considered, the interior tank material of LNG storage tank without exception all use 9Ni
Steel.
Welding for 9Ni steel, domestic correlative study are started late, and have accumulated some experiences at present, but it is still necessary to further
It improves and improves.9Ni steel submerged arc welding welding materials are currently in based on ERNiCrMo-4 all by import, domestic
It breathes out the units such as weldering institute, capital group, Antai Technology and has although carried out correlative study, but without ripe product.And currently, being suitable for
The related patents and few, application number 201010292568.7 of the more demanding mating submerged arc welding flux of low-temperature impact toughness 9Ni steel
Disclose a kind of 9Ni steel sintered flux and its manufacturing method, the patent slag system, mating welding wire, the scope of application and deposited metal
Performance, it is different with this patent.
Invention content
The present invention is intended to provide a kind of match with the Ni-based bare wires of ERNiCrMo-4 that are meeting II SFA-5.14 of ASME, welding
Craftsmanship is preferable, and weld properties are good, and deposited metal ultralow-temperature flexibility is stable, excellent, and heat resistanceheat resistant crack sensitivity is good, fits
Sintered flux for the downhand welding of 9Ni steel submerged arcs, horizontal position welding.
To achieve the above object, the technical scheme is that：A kind of 9Ni steel welding sintered flux, in parts by weight
Meter, consisting of：CaF2：20 ~ 28 parts, MgO：23 ~ 33 parts, Al2O3：15 ~ 18 parts, CaO：8 ~ 12 parts, SiO2：4 ~ 10 parts, BaO：
0.5 ~ 2 part, TiO2 ：0.5 ~ 2 part, ZrO2：0.5 ~ 2 part, alloy：0.5 ~ 2.5 part, waterglass：15 ~ 20 parts；The alloy is silicon
The combination of ferroalloy, manganese-silicon or both.
In specific implementation, the feed postition of solder flux each component of the present invention is as follows：MgO is in the form of magnesia, CaF2With
The form of fluorite, Al2O3In the form of Alpha-alumina, SiO2In the form of wollastonite, CaO by wollastonite and it is marmorean in the form of,
ZrO2In the form of zircon sand, BaO is in the form of barium sulfate, TiO2 In the form of rutile, alloy in the form of alloy powder,
Waterglass is in the form of potassium-sodium silicate.A kind of above-mentioned 9Ni steel welding sintered flux of the present invention, is counted in parts by weight,
Group becomes：23 ~ 33 parts of magnesia, 20 ~ 28 parts of fluorite, 15 ~ 18 parts of Alpha-alumina, 14 ~ 20 parts of wollastonite, 0.5 ~ 3 part of marble, zirconium
1 ~ 3 part of sand, 0.3 ~ 1 part of barium sulfate, 0.1 ~ 0.3 part of rutile, 0.1 ~ 0.5 part of alloy, 15 ~ 20 parts of potassium-sodium silicate；It is described
Alloy is the combination of Antaciron, manganese-silicon or both.
Above-mentioned waterglass be modulus be 2.9, potassium：Sodium is 3:1 potassium-sodium silicate.
A kind of preparation method of 9Ni steel welding sintered flux of the present invention is：Each raw material is taken by the weight proportion, it will
Each powder in addition to waterglass is dry-mixed uniformly, and waterglass wet mixing is then added, after granulation, through 300 ~ 400 DEG C of low temperature dryings, then passes through
660 ~ 750 DEG C of high temperature sinterings are to get solder flux finished product.
The present invention advocates that grain diameter is excessive will to make welding using the flux particle between 10-50 mesh as finished product solder flux
Process is unstable, and grain size is too small, is adversely affected to the welding process under working condition.
Solder flux described in this patent has the characteristics that：
（1）In terms of raw material selection, the lower raw material of impurity contents such as P, S are selected as possible（Including powder and
Waterglass）, to reduce transition of S, P matter into deposited metal, the degree of purity of deposited metal is improved, it is tough to be favorably improved its low temperature
Property.
（2）Using fluorine alkalinity CaF2-MgO- Al2O3-CaO-SiO2Slag system.The characteristics of slag system is basicity height, can be effective
The content of weld metal non-metallic inclusion is reduced, weld metal oxygen content is reduced, improves its low-temperature flexibility.
（3）Contain a certain amount of zircon sand in solder flux.On the one hand zircon sand can improve the removability of slag, on the one hand can be to weldering
A certain amount of Zr of transition in metal is stitched, crystal grain thinning is played the role of, improves weld metal low-temperature flexibility.
（4）Contain higher CaF in solder flux2, fluoride and SiO2Interaction, can play good dehydrogenation effect.
（5）A certain amount of marble, barium sulfate are added in solder flux, the oxidisability of arc atmosphere can be improved, reduces electric arc
The hydrogen partial pressure of atmosphere, to reduce diffusible hydrogen.
The design considerations of component is as follows in solder flux：
MgO is a kind of strong basicity oxide, is slag chief component.In basic slag system, it can improve weld seam
The impact flexibility of metal.Result of study of the present invention shows the content of MgO no more than 33 parts, and excessive MgO can increase slag
Viscosity improves the setting temperature of slag, reduces the mobility of slag, seriously affects the mouldability of weld seam.But content of MgO cannot be low
In 23 parts, on the one hand too low MgO can cause solder flux fusing point too low, cause appearance of weld bad, on the one hand can cause slag alkali
It spends low, the low-temperature flexibility of weld metal is caused to decline.
CaF2It is basic anhydride, is slag chief component, slag former and diluent are belonged in solder flux.Molten
The CaF of state2Mobility is preferable, can reduce viscosity, fusing point and the surface tension of slag, improve the mobility of slag.In addition,
CaF2It is also obvious to the diffusible hydrogen effect for reducing weld metal.The present invention the experimental results showed that, CaF2Content cannot be below
20 parts, too low content, which is be easy to cause, to be sprawled poor, and weld face generates more load mould.In addition, the experiment of the present invention
The result shows that CaF2Content no more than 28 parts, excessively high CaF2Content viscosity coefficient of dross will be made too low, cause welding bead at
Type is bad.
CaO is a kind of strong basicity oxide, is slag chief component.Adjustable slag basicity, and can effectively carry
High solder flux heavy current ability improves slag surface tension and interfacial tension.Result of study of the present invention shows that the content of CaO cannot
More than 12 parts, excessive CaO can reduce the mobility of slag, and weld seam spreadability is made to be deteriorated；But CaO cannot be below 8 parts, too low
CaO causes flux basicity to decline, and can reduce the low-temperature flexibility of weld metal.
Al2O3It is a kind of amphoteric oxide, is the chief component of solder flux.It is a kind of important vitreum in solder flux
Slag making materials, Al2O3It is the conditioning agent of viscosity coefficient of dross, the mobility of slag can be adjusted, there is the work for increasing slag surface tension
With.Result of study of the present invention shows Al2O3Content no more than 18 parts, excessive Al2O3It can make to generate stomata and fiber crops in weld seam
Point, but Al2O315 parts are cannot be below, too low Al2O3Weld seam can be made to show uneven, influence appearance of weld.
SiO2It is a kind of acidic materials, main function is slag making, the viscosity and mobility of liquid slag bath is adjusted, to weld seam
It is molded extremely important.Result of study of the present invention shows SiO2When addition is more than 10 parts, weld metal increasing silicon is more serious, weld seam gold
Belong to non-metallic inclusion to increase, causes weld metal low-temperature flexibility to decline, but SiO2Addition cannot be less than 4 parts, otherwise will
Cause appearance of weld bad.
ZrO2It is a kind of acidic oxide, there is negative linear expansion coefficient.Volume change in cooling procedure, it is suitable to skull
Profit stripping has positive effect, and ZrO2Can adjust slag bath viscosity, improve welding bead molding, at the same can into weld metal mistake
A certain amount of Zr is crossed, the low-temperature flexibility of deposited metal is improved.
Alloy：Predominantly ferrosilicon, manganese-silicon etc. primarily serve the effect of deoxidation.
Waterglass：Main function is cohesive powder.When waterglass addition is less than required minimum flow, solder flux was granulated
Granulating effect is deteriorated in journey；When addition is excessive, more SiO can be introduced into formula2, unfavorable shadow is generated to solder flux craftsmanship
It rings.
Advantageous effect：
This patent develops one kind and the cooperation of corresponding welding wire for submerged-arc welding by innovating slag system, and craftsmanship is preferable, suitable for burying
Arc horizontal position welding, the sintered flux that low-temperature flexibility is good, heat resistanceheat resistant crack sensitivity is good, and cost is relatively low, before there is larger marketing
Scape and good economic benefit.After technical solution of the present invention is implemented, manufactured solder flux has following characteristics：
（1）Solder flux craftsmanship is good, and under wider technological specification, arc stability takes off slag and is easy, welding bead beautiful appearance.
（2）Solder flux production adaptability is good, and flux particle degree is uniform.
（3）Coordinate with solid welding wire ERNiCrMo-4, deposited metal composition is stablized, and yield strength is more than 430MPa, tension
Intensity is more than 430MPa, and elongation percentage is more than 35%, and -196 DEG C of Charpy-V impact powers are more than 100J（Lateral expansion is more than 0.38）, can
Meet the welding of ultralow temperature military service 9Ni steel.
（4）Coordinate with solid welding wire ERNiCrMo-4, deposited metal heat resistanceheat resistant crack sensitivity is excellent.
（5）Applicable and direct current, AC welding, appearance of weld are good.
（6）It is welded suitable for submerged arc downhand welding, horizontal position, good knitting between welding bead is welded in horizontal position, and appearance of weld is good
It is good.
Specific implementation mode
According to design component content of the present invention, three specific embodiments are given, according to preparation process of the present invention
Experiment solder flux is prepared, the specific composition proportion of three embodiments is shown in Table 1, it should be noted that the invention is not limited in these to implement
Example.
The chemical composition of the main raw material(s) of solder flux of the present invention requires such as the following table 2：
Solder flux made of above three embodiments is detected.By solder flux by 320 ~ 350 DEG C of bakings before soldering test
Then roasting 1 hour matches ERNiCrMo-4 welding wire for submerged-arc welding respectively, by taking Φ 2.4mm welding wires as an example, welding condition is：Welding
Power supply DC reverse connection, 320 ~ 350A of welding current, 28 ~ 30V of weldingvoltage, 100 ~ 150 DEG C of temperature between road, test result such as table 3
Shown in table 4.
Solder flux processing performance proposed by the invention is excellent, diffusible hydrogen is low, coordinates with solid welding wire ERNiCrMo-4, can expire
The welding of the downhand welding of 9Ni steel and horizontal position be on active service under the conditions of sufficient low-temperature deep.
Claims (3)
1. a kind of 9Ni steel welding sintered flux, it is characterised in that：It counts in parts by weight, consisting of：CaF2：20 ~ 28 parts,
MgO：23 ~ 33 parts, Al2O3：15 ~ 18 parts, CaO：8 ~ 12 parts, SiO2：4 ~ 10 parts, BaO：0.5 ~ 2 part, TiO2：0.5 ~ 2 part, ZrO2：
0.5 ~ 2 part, alloy：0.5 ~ 2.5 part, waterglass：15 ~ 20 parts；The alloy is the group of Antaciron, manganese-silicon or both
It closes；The sintered flux coordinates with solid welding wire ERNiCrMo-4, to make -196 DEG C of Charpy-V impact powers of deposited metal be more than 100J,
Lateral expansion is more than 0.38, to meet the welding of ultralow temperature military service 9Ni steel.
2. a kind of 9Ni steel welding sintered flux as described in claim 1, it is characterised in that：The waterglass is that modulus is
2.9, potassium：Sodium is 3:1 potassium-sodium silicate.
3. such as a kind of preparation method of 9Ni steel welding sintered flux of claim 1 ~ 2 any one of them, it is characterised in that：
Each raw material is taken by the weight proportion, each powder in addition to waterglass is dry-mixed uniformly, waterglass wet mixing is then added, is granulated
Afterwards, through 300 ~ 400 DEG C of low temperature dryings, then through 660 ~ 750 DEG C of high temperature sinterings to get solder flux finished product.
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| CN201610777221.9A CN106238965B (en) | 2016-08-30 | 2016-08-30 | A kind of 9Ni steel welding sintered flux and preparation method thereof |
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| CN201610777221.9A CN106238965B (en) | 2016-08-30 | 2016-08-30 | A kind of 9Ni steel welding sintered flux and preparation method thereof |
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| CN106238965B true CN106238965B (en) | 2018-07-31 |
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| CN106514055A (en) * | 2016-12-29 | 2017-03-22 | 沪东重机有限公司 | Ship steel submerged-arc horizontal welding flux and preparation method thereof |
| CN107745203A (en) * | 2017-09-29 | 2018-03-02 | 四川西冶新材料股份有限公司 | Large-scale water power 800MPa level high-strength steel submerged arc fluxes and its production method |
| CN108015453A (en) * | 2017-12-05 | 2018-05-11 | 河南科技大学 | A kind of nickel-base alloy submerged-arc welding sintered flux and preparation method and application |
| CN108581270B (en) * | 2018-03-16 | 2020-12-04 | 洛阳双瑞特种合金材料有限公司 | Sintered flux for welding LPG ship and preparation method and application thereof |
| CN109454361A (en) * | 2018-11-28 | 2019-03-12 | 东莞理工学院 | A kind of low-hygroscopicity submerged-arc welding sintered flux and preparation method thereof |
| CN110102933B (en) * | 2019-04-19 | 2021-01-26 | 洛阳双瑞特种合金材料有限公司 | Smelting flux for welding 9Ni steel and preparation method thereof |
| CN110238493B (en) * | 2019-06-25 | 2020-12-18 | 钢铁研究总院 | Submerged arc welding wire, submerged arc welding material and application thereof |
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| CN112059473A (en) * | 2020-09-12 | 2020-12-11 | 北京金威焊材有限公司 | Ultralow-hydrogen type high-alkalinity high-toughness sintered flux |
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| CN113319470A (en) * | 2021-06-21 | 2021-08-31 | 中国船舶重工集团公司第七二五研究所 | Bonding flux capable of transferring alloy elements and used for nickel-based welding wire and preparation method thereof |
| CN114346522B (en) * | 2022-01-24 | 2023-03-10 | 昆山京群焊材科技有限公司 | Stainless steel submerged arc welding wire welding flux capable of using alternating current for hydrogen energy and welding process |
| CN115319331B (en) * | 2022-09-07 | 2024-03-26 | 四川大西洋焊接材料股份有限公司 | Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application |
| CN115533367B (en) * | 2022-11-24 | 2023-03-24 | 东北大学 | Dephosphorizing and desulfurizing sintered flux and preparation method thereof |
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