CN106271218A - A kind of sintered flux for the welding of ocean engineering high-strength steel and preparation method thereof - Google Patents
A kind of sintered flux for the welding of ocean engineering high-strength steel and preparation method thereof Download PDFInfo
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- CN106271218A CN106271218A CN201610651166.9A CN201610651166A CN106271218A CN 106271218 A CN106271218 A CN 106271218A CN 201610651166 A CN201610651166 A CN 201610651166A CN 106271218 A CN106271218 A CN 106271218A
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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
- B23K35/362—Selection of compositions of fluxes
-
- 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
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- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention discloses a kind of sintered flux for the welding of ocean engineering high-strength steel and preparation method thereof, belongs to fluorine alkaline type sintered flux, and described sintered flux is composed of the following components according to parts by weight: MgO 19 ~ 24 parts, CaF220 25 parts, Al2O312 ~ 16 parts, SiO2 4 ~ 8 parts, CaO8 ~ 10 part, BaO 2 ~ 4 parts, NaF1 ~ 3 part, LiF 13 parts, ZrO212 parts, Fe2O3 23 parts, alloy 0.5～1.5 parts and waterglass 14～16 parts.Sintered flux manufacturability disclosed by the invention is good, under wider technological specification, and arc stability, de-slag is easy, and welding bead beautiful appearance both can meet the welding of the yield strength E550 steel plate more than 550MPa, the welding of the yield strength E690 steel plate more than 690MPa can be met again, and diffusible hydrogen is relatively low.
Description
Technical field
The invention belongs to technical field of welding materials, be specifically related to a kind of sintering weldering for the welding of ocean engineering high-strength steel
Agent and preparation method thereof.
Background technology
Along with developing rapidly of China's economy, the most increasing to the demand of oil, due to China's On shore Oil Development
Falling sharply rapidly, offshore and gas development has become the focus of China's energy development.Offshore oil is entered from China's fifties of the upper world
Since platform drilling field, through semicentennial effort, China in fields such as drilling at the sea, marine settings manufactures achieved with
Bigger progress.Due to marine settings work under bad environment, Marine Engineering Steel and the wlding supporting with it are required higher.
At present, the steel plate of yield strength 550MPa rank and 690MPa rank has been realized in domesticizing, but the wlding supporting with it, special
It is not SAW consumable material, is still monopolized by a few countries such as Europe, the United States, day.At present, the domestic solid welding wire for submerged-arc welding of high-strength steel submerged-arc welding
Either the impurity element such as oxygen, nitrogen level or S, P is all little with import welding wire difference, but matched sintered flux
Join and there is also bigger problem.It is mainly manifested in: (1) mates-40 DEG C of ballistic works of deposited metal relatively with corresponding solid welding wire
Low and unstable；(2) diffusible hydrogen content is higher, HD, easily there is cold crack in ＞ 5mL/100g, transports to the safety of ocean platform
Row brings bigger harm.Up to now, the skill that the most supporting to ocean engineering platform high-strength steel submerged arc welding flux is relevant
Art is the most perfect, a kind of ocean engineering high tenacity low hydrogen type sintered flux and manufacture method (application number thereof
201510577473.2), this patented invention is mainly used in the welding of ocean engineering yield strength 460MPa level steel, range
Limitation, the steel plate for yield strength 550MPa rank and 690MPa rank is inapplicable, and therefore Yu Haiyang work is used in research and development
The sintered flux of journey high-strength steel welding is most important.
Summary of the invention
For solve above-mentioned technical problem, the present invention provide a kind of for ocean engineering high-strength steel welding sintered flux and
Preparation method, this sintered flux manufacturability is good, and under wider technological specification, arc stability, de-slag is easy, and welding bead molding is beautiful
See, both can meet the welding of the yield strength E550 steel plate more than 550MPa, yield strength can be met again more than 690MPa's
The welding of E690 steel plate, and diffusible hydrogen is relatively low.
The technical solution adopted in the present invention is: a kind of sintered flux for the welding of ocean engineering high-strength steel, belongs to fluorine
Alkaline type sintered flux, composed of the following components according to parts by weight: MgO 19 ~ 24 parts, CaF220-25 part, Al2O3 12~16
Part, SiO2 4 ~ 8 parts, CaO8 ~ 10 part, BaO 2 ~ 4 parts, NaF1 ~ 3 part, LiF 1-3 part, ZrO21-2 part, Fe2O3 2-3 part, alloy
0.5～1.5 part and waterglass 14～16 parts.
As the further optimization of a kind of sintered flux for the welding of ocean engineering high-strength steel of the present invention, described sintering weldering
Agent is made up of following raw material according to parts by weight: 19 ~ 24 parts of magnesia, fluorite 20-25 part, Alpha-alumina 12 ~ 16 parts, wollastonite 8 ~
15 parts, 4 ~ 7 parts of marble, sodium fluoride 1 ~ 3 part, lithium fluoride 1-3 part, zircon sand 1.5-3 part, bloodstone 2 ~ 3 parts, alloy 0.5-
1.5 parts and pure sodium silicate 14 ~ 16 parts.
The preparation method of the described sintered flux for the welding of ocean engineering high-strength steel, comprises the following steps:
Step (1), take above-mentioned raw material according to parts by weight, then the dry mash in raw material is dry mixed uniformly, is mixed
Siccative, standby；
Step (2), pure sodium silicate poured in the mixed dry material that step (1) obtains and carry out wet mixing, obtaining compound, standby
With；
Step (3), compound step (2) obtained carry out pelletize in granulation disc, standby；
Step (4), step (3) is dried under the conditions of the product of pelletize is placed in 150 ~ 200 DEG C, obtain semi-finished product, standby；
Step (5), semi-finished product step (4) obtained carry out high temperature sintering at a temperature of 650 DEG C ~ 700 DEG C, have sintered cold
But, pack, put in storage, i.e. obtain the sintered flux for the welding of ocean engineering high-strength steel.
As the further optimization of the preparation method of a kind of sintered flux for the welding of ocean engineering high-strength steel of the present invention,
The high temperature sintering time described in step (5) is 1.5-2.5h.
Compared with prior art, the present invention at least has and has the advantage that and beneficial effect:
(1) the solder flux manufacturability that the present invention provides is good, and under wider technological specification, arc stability, de-slag is easy, and welding bead becomes
Type is attractive in appearance.
(2) the production adaptability of solder flux of the present invention is good, and flux particle degree is uniform.
(3) solder flux of the present invention coordinates with solid welding wire H05Mn2Ni2MoA, and deposited metal composition is stable, and yield strength is big
In 550MPa ,-40 DEG C of Charpy-V impact powers, more than 100J, can meet the welding of the yield strength E550 steel plate more than 550MPa.
(4) solder flux of the present invention coordinates with solid welding wire H08Mn2Ni3MoA, and deposited metal composition is stable, and yield strength is big
In 690MPa ,-40 DEG C of Charpy-V impact powers, more than 100J, can meet the welding of the yield strength E690 steel plate more than 690MPa.
(5) solder flux of the present invention coordinates deposited metal diffusible hydrogen relatively low with solid welding wire, can meet HD≤5.0mL/100g
(gas chromatography).
Detailed description of the invention
For making present disclosure become apparent, below in conjunction with specific embodiment, describe the present invention.
A kind of sintered flux for the welding of ocean engineering high-strength steel, belongs to fluorine alkaline type sintered flux, according to parts by weight
Composed of the following components: MgO 19 ~ 24 parts, CaF220-25 part, Al2O312 ~ 16 parts, SiO2 4 ~ 8 parts, CaO8 ~ 10 part, BaO
2 ~ 4 parts, NaF1 ~ 3 part, LiF 1-3 part, ZrO21-2 part, Fe2O3 2-3 part, alloy 0.5～1.5 parts and waterglass 14～16 parts.
Described sintered flux, solder flux slag system is mainly by MgO-CaO-BaO-CaF2-Al2O3-SiO2System's composition.
The feed postition of each component of solder flux of the present invention is as follows: MgO is with the form of magnesia；CaF2 with the form of fluorite,
Al2O3With the form of Alpha-alumina, SiO2With the form of wollastonite, CaO is with wollastonite and marmorean form, ZrO2With zirconium English
The form of sand, NaF is with the form of sodium fluoride, and LiF is with the form of lithium fluoride, and BaO is with the form of brium carbonate, Fe2O3With bloodstone
Form, alloy is with the form of alloy powder, and waterglass is with the form of pure sodium silicate.Described sintered flux according to parts by weight by
Following raw material is made: 19 ~ 24 parts of magnesia, fluorite 20-25 part, Alpha-alumina 12 ~ 16 parts, wollastonite 8 ~ 15 parts, marble 4 ~ 7
Part, sodium fluoride 1 ~ 3 part, lithium fluoride 1-3 part, zircon sand 1.5-3 part, bloodstone 2 ~ 3 parts, alloy 0.5-1.5 part and pure sodium water glass
Glass 14 ~ 16 parts.
The preparation method of the described sintered flux for the welding of ocean engineering high-strength steel, comprises the following steps:
Step (1), take above-mentioned raw material according to parts by weight, then the dry mash in raw material is dry mixed uniformly, is mixed
Siccative, standby；
Step (2), pure sodium silicate poured in the mixed dry material that step (1) obtains and carry out wet mixing, obtaining compound, standby
With；
Step (3), compound step (2) obtained carry out pelletize in granulation disc, standby；
Step (4), step (3) is dried under the conditions of the product of pelletize is placed in 150 ~ 200 DEG C, obtain semi-finished product, standby；
Step (5), semi-finished product step (4) obtained carry out high temperature sintering 1.5-2.5h at a temperature of 650 DEG C ~ 700 DEG C, sintering
Complete cooling, pack, put in storage, i.e. obtain the sintered flux for the welding of ocean engineering high-strength steel.
Solder flux main raw material(s) requires to be shown in Table 1.
The chemical composition requirement of table 1 main raw material(s)
The present invention advocate 10-60 mesh between flux particle as finished product solder flux, grain diameter is excessive will make weld deposit process
Instability, particle diameter is too small, adversely affects the welding process under working condition.
Described in this patent, solder flux has the following characteristics that
(1) in terms of raw material selection, the raw material as far as possible selecting the impurity contents such as P, S relatively low (includes powder and water glass
Glass), to reduce the transition in deposited metal of S, P matter, improve the degree of purity of deposited metal, be favorably improved its low-temperature flexibility.
(2) novel MgO-CaO-BaO-CaF is used2-Al2O3-SiO2Slag system.The feature of this slag system is that basicity is high, can be effective
Reduce the content of weld metal non-metallic inclusion, reduce weld metal oxygen content, improve its low-temperature flexibility.
(3) containing 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 seam metal, plays crystal grain thinning, improves the effect of weld metal low-temperature flexibility.
(4) containing higher CaF in solder flux2And a certain amount of NaF and LiF, three kinds of fluorides and SiO2Interact,
Good dehydrogenation effect can be played.
(5) solder flux adds a certain amount of marble, brium carbonate and bloodstone, the oxidisability of arc atmosphere can be improved,
Reduce the hydrogen dividing potential drop of arc atmosphere, thus reduce diffusible hydrogen.
In solder flux of the present invention, the design considerations of component is as follows:
MgO is a kind of strong basicity oxide, for slag key component.In basic slag system, it can improve weld metal
Impact flexibility.Result of study of the present invention shows that the content of MgO not can exceed that 24 parts, and too much MgO can increase the viscous of slag
Degree, improves the solidification temperature of slag, reduces the mobility of slag, has a strong impact on the mouldability of weld seam.But content of MgO cannot be below
19 parts, too low MgO mono-aspect can cause solder flux fusing point too low, causes appearance of weld bad, on the one hand can cause slag basicity
Too low, cause the low-temperature flexibility of weld metal to decline.
CaF2It is basic anhydride, for slag key component, solder flux belongs to slag former and diluent.Molten
The CaF of state2Mobility is preferable, can reduce the viscosity of slag, fusing point and surface tension, improves the mobility of slag.It addition,
CaF2Diffusible hydrogen effect to reducing weld metal is the most obvious.The present invention test result indicate that, CaF2Content cannot be below
20 parts, too low content easily cause sprawl poor, and weld face produce more load mould.It addition, the experiment of the present invention
Result shows, CaF2Content not can exceed that 25 parts, too high CaF2Content viscosity coefficient of dross will be made too low, cause welding bead to become
Type is bad.
CaO is a kind of strong basicity oxide, for slag key component.Scalable slag basicity, and can effectively carry
High solder flux heavy current ability, improves slag surface tension force and interfacial tension.Result of study of the present invention shows that the content of CaO can not
More than 10 parts, too much CaO can reduce the mobility of slag, makes weld seam spreadability 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, for the key component of solder flux.It solder flux is a kind of important vitreous body
Slag making materials, Al2O3It is the regulator of viscosity coefficient of dross, the mobility of slag can be adjusted, there is the work increasing slag surface tension force
With.Result of study of the present invention shows Al2O3Content not can exceed that 16 parts, too much Al2O3Can make weld seam produces pore and fiber crops
Point, but Al2O3Cannot be below 12 parts, too low Al2O3Weld seam can be made to show uneven, affect appearance of weld.
SiO2Being a kind of acidic materials, Main Function is slag making, adjusts viscosity and the mobility of liquid slag bath, butt welded seam
Molding is extremely important.Result of study of the present invention shows SiO2When addition is more than 8 parts, it is more serious that weld metal increases silicon, weld seam gold
Belong to non-metallic inclusion to increase, cause weld metal low-temperature flexibility to decline, but SiO2Addition can not otherwise will less than 4 parts
Cause appearance of weld bad.
ZrO2It is a kind of acidic oxide, there is negative linear expansion coefficient.Change in volume in cooling procedure, suitable to skull
Profit is peeled off positive effect, and ZrO2Slag bath viscosity can be regulated, improve welding bead molding, simultaneously can in weld metal mistake
Cross a certain amount of Zr, improve the low-temperature flexibility of deposited metal.
NaF, LiF: be low melting point fluoride, Main Function is the diffusible hydrogen reducing weld metal.
Alloy: predominantly ferrosilicon, ferrotianium and manganese metal etc., primarily serves the effect of deoxidation.
Waterglass: Main Function is bonding powder body.When waterglass addition is less than required minimum flow, solder flux pelletize
In journey, granulating effect is deteriorated；When addition is too much, more SiO can be introduced in formula2, solder flux manufacturability is produced unfavorable shadow
Ring.
According to the constituent content in the above-mentioned formula of the present invention, prepare 3 kinds of powders, respectively embodiments 1-3, and according to
Preparation technology of the present invention prepares experiment solder flux, and concrete proportioning is shown in Table 2, it should be noted that the invention is not limited in these
Embodiment.
Table 2 embodiment 1-3 composition proportion (part)
Solder flux said components made detects, by solder flux through 350 ~ 400 DEG C of bakings 2 hours before soldering test, so
Rear coupling H05Mn2Ni2MoA and H08Mn2Ni3MoA welding wire for submerged-arc welding respectively, specifies according to GB GB/T 5118-2012 standard,
Carry out deposited metal composition analysis, deposited metal Mechanics Performance Testing；It is diffused hydrogen content by GB/T 3965-2012
Measure.As a example by Φ 4.0mm welding wire, welding condition is: source of welding current DC reverse connection, welding current 550 ~ 600A, welding
Voltage 28 ~ 32V, temperature 100 ~ 180 DEG C between road, test result is as shown in table 3-8.
Table 3 embodiment solder flux coupling H05Mn2Ni2MoA welding wire deposited metal composition (wt%)
Table 4 embodiment solder flux coupling H08Mn2Ni3MoA welding wire deposited metal composition (wt%)
Table 5 embodiment solder flux coupling H05Mn2Ni2MoA welding wire deposited metal mechanical property
Table 6 embodiment solder flux coupling H08Mn2Ni3MoA welding wire deposited metal mechanical property
Table 7 embodiment solder flux coupling H05Mn2Ni2MoA welding wire deposited metal diffusible hydrogen content (gas chromatography)
Table 8 embodiment solder flux coupling H08Mn2Ni3MoA welding wire deposited metal diffusible hydrogen content (gas chromatography)
From data above, solder flux processing performance proposed by the invention is excellent, and diffusible hydrogen is low, with solid welding wire
H05Mn2Ni2MoA coordinates, and can meet the welding of the yield strength E550 steel plate more than 550MPa；With solid welding wire
H08Mn2Ni3MoA coordinates, and can meet the welding of the yield strength E690 steel plate more than 690MPa.
Claims (4)
1., for a sintered flux for ocean engineering high-strength steel welding, belong to fluorine alkaline type sintered flux, it is characterised in that according to
Parts by weight are composed of the following components: MgO 19 ~ 24 parts, CaF220-25 part, Al2O312 ~ 16 parts, SiO2 4 ~ 8 parts, CaO8 ~
10 parts, BaO 2 ~ 4 parts, NaF1 ~ 3 part, LiF 1-3 part, ZrO21-2 part, Fe2O3 2-3 part, alloy 0.5～1.5 parts and waterglass
14～16 parts.
A kind of sintered flux for the welding of ocean engineering high-strength steel, it is characterised in that described burning
Knot solder flux is made up of following raw material according to parts by weight: 19 ~ 24 parts of magnesia, fluorite 20-25 part, Alpha-alumina 12 ~ 16 parts, silicon ash
8 ~ 15 parts of stone, 4 ~ 7 parts of marble, sodium fluoride 1 ~ 3 part, lithium fluoride 1-3 part, zircon sand 1.5-3 part, bloodstone 2 ~ 3 parts, alloy
0.5-1.5 part and pure sodium silicate 14 ~ 16 parts.
A kind of preparation method of the sintered flux for the welding of ocean engineering high-strength steel, its feature
It is, comprises the following steps:
Step (1), take above-mentioned raw material according to parts by weight, then the dry mash in raw material is dry mixed uniformly, is mixed
Siccative, standby；
Step (2), pure sodium silicate poured in the mixed dry material that step (1) obtains and carry out wet mixing, obtaining compound, standby
With；
Step (3), compound step (2) obtained carry out pelletize in granulation disc, standby；
Step (4), step (3) is dried under the conditions of the product of pelletize is placed in 150 ~ 200 DEG C, obtain semi-finished product, standby；
Step (5), semi-finished product step (4) obtained carry out high temperature sintering at a temperature of 650 DEG C ~ 700 DEG C, have sintered cold
But, pack, put in storage, i.e. obtain the sintered flux for the welding of ocean engineering high-strength steel.
A kind of preparation method of the sintered flux for the welding of ocean engineering high-strength steel, its feature
Being, the high temperature sintering time described in step (5) is 1.5-2.5h.
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| CN108788538A (en) * | 2018-06-30 | 2018-11-13 | 东北大学 | One kind middle high fluorine-type sintered flux of titanium peculiar to vessel and preparation method thereof |
| CN108788523A (en) * | 2018-06-30 | 2018-11-13 | 东北大学 | Fluorine-type sintered flux and preparation method thereof in a kind of high-silicon high-manganese peculiar to vessel |
| CN108465981A (en) * | 2018-06-30 | 2018-08-31 | 东北大学 | A kind of high alkalinity silicomanganese type sintered flux peculiar to vessel and preparation method thereof |
| CN108788522A (en) * | 2018-06-30 | 2018-11-13 | 东北大学 | One kind high high fluorine-type sintered flux of titanium peculiar to vessel and preparation method thereof |
| CN108788526A (en) * | 2018-06-30 | 2018-11-13 | 东北大学 | Low fluorine-type sintered flux of a kind of high-silicon high-manganese peculiar to vessel and preparation method thereof |
| CN108544139A (en) * | 2018-06-30 | 2018-09-18 | 东北大学 | A kind of high fluorine-type sintered flux of low titanium peculiar to vessel and preparation method thereof |
| CN108788529A (en) * | 2018-06-30 | 2018-11-13 | 东北大学 | A kind of high alkalinity fluorine alkaline type sintered flux peculiar to vessel and preparation method thereof |
| CN108465979A (en) * | 2018-06-30 | 2018-08-31 | 东北大学 | A kind of Super-high Manganese high-silicon type sintered flux peculiar to vessel and preparation method thereof |
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| CN110102933A (en) * | 2019-04-19 | 2019-08-09 | 洛阳双瑞特种合金材料有限公司 | A kind of 9Ni steel welding fysed 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 |
| 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 |
| CN114260616A (en) * | 2022-01-11 | 2022-04-01 | 哈尔滨焊接研究院有限公司 | TC4 titanium alloy submerged arc welding flux and preparation method and application thereof |
| WO2023134149A1 (en) * | 2022-01-11 | 2023-07-20 | 哈尔滨焊接研究院有限公司 | Tc4 titanium alloy submerged arc welding flux, a preparation method therefor and application thereof |
| CN116900551A (en) * | 2023-09-12 | 2023-10-20 | 东北大学 | Secondary-utilization light smelting flux and preparation method and application thereof |
| CN116900551B (en) * | 2023-09-12 | 2023-11-24 | 东北大学 | Secondary-utilization light smelting flux and preparation method and application thereof |
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