CN1030293C - Electric slag bead welding flux - Google Patents
Electric slag bead welding flux Download PDFInfo
- Publication number
- CN1030293C CN1030293C CN 94101467 CN94101467A CN1030293C CN 1030293 C CN1030293 C CN 1030293C CN 94101467 CN94101467 CN 94101467 CN 94101467 A CN94101467 A CN 94101467A CN 1030293 C CN1030293 C CN 1030293C
- Authority
- CN
- China
- Prior art keywords
- welding
- slag
- solder flux
- bead
- welding flux
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The present invention belongs to welding material which is mainly suitable for the lining overlaying weld of nuclear reactors, petroleum hydrogenation reactors and chemical fertilizer synthesis tower constant pressure containers. The welding flux has components (weight %) as following: 25 to 55% of CaF2, 10 to 30% of MgF2, 5 to 15% of Na3AlF6, 5 to 25% of Al2O3, 5 to 20% of SiO2, 5 to 25% of MgO, 1 to 10% of Mn, 1 to 10% of Cr2O3 and no more than 15% of ZrO. The welding flux is produced by using a sintering method, and sintering temperature is 500 to 850 DEG C. The present invention has the main advantages of low dilution rate of base material, good shaping performance and slag detachability of a bead, low impurity content and thermal crack prevention.
Description
The invention belongs to electroslag welding flux material field.Mainly be applicable to the liner built-up welding of nuclear-power reactor, oil hydrogenation reactor, chemical fertilizer synthetic tower equal pressure container.
During pressure vessel such as nuclear-power reactor, oil hydrogenation reactor, chemical fertilizer synthetic tower is made, the normal inwall composite stainless steel liner that adopts overlaying method at its low-alloy steel cylindrical shell and end socket, prevent the corrosion of medium, assurance equipment normally moves, and prolongs its service life.In overlaying method, compare advantage such as strip electrode electroslag surfacing has that the mother metal dilution rate is low, deposition efficiency is high, the carbon of welding bead metal and oxygen content are low with other method.Therefore, this welding procedure has obtained using more widely in the world.
In strip electrode electroslag surfacing technology, reasonably selecting or be equipped with solder flux is to be directly connected to the quality of overlay cladding and a key factor of bead-welding technology parameter.
In the prior art, the strip electrode electroslag surfacing solder flux is mainly based on CaF
2-Al
2O
3, CaF
2-TiO
2Two basic slag systems.CaF
2-TiO
2Slag system contains a large amount of TiO
2, if produce solder flux with sintering method, TiO
2Activity big, cause welding bead metal severe oxidation.CaF
2-Al
2O
3Though slag system has the characteristics of self, along with the difference of the concrete composition of solder flux, also there is different shortcomings, for example clear 59-97793 patent specification just provides a kind of CaF
2-Al
2O
3The ESW solder flux of slag system.The main weak point of this solder flux is removability of slag difference or dry slag, and in addition, figuration of bead is poor, and first road is prone to depressed phenomenon when double-deck built-up welding.
The object of the present invention is to provide the good strip electrode electroslag surfacing solder flux of processing performance such as a kind of removability of slag and figuration of bead.
At above-mentioned purpose, strip electrode electroslag surfacing solder flux of the present invention has adopted CaF
2-Al
2O
3Slag system.In order to improve the removability of slag and figuration of bead, add Na in the solder flux
3AlF
6, MgF
2, simultaneously,, also added MgO, SiO in the solder flux for conductance that improves slag and the fusing point that reduces slag
2Deng.Its concrete composition (weight %) is: CaF
225～55%, MgF
210～30%, Na
3AlF
65～15%, Al
2O
35～25%, SiO
25～20%, MgO5～25%, MnO1～10%, Cr
2O
31～10%, ZrO
2≤ 15%.
Now that the action principle division of each component in this solder flux is as follows:
CaF
2As main conductive compositions.
MgF
2Except that as the conductive agent, be mainly used to regulate the interfacial tension of metal-slag, make welding bead level and smooth.
Na
3AlF
6Be mainly used to improve the removability of slag, reduce the fusing point and the interfacial tension of slag, increase the flowability of slag, help the edge fusion of broadband utmost point overlay cladding, improve figuration of bead.
Three kinds of villiaumite content are low excessively, and electric arc, the stability of broken base electroslag process take place during built-up welding; Too high levels, resistance heat reduces, and the influence fusion is so be advisable in right amount.
Al
2O
3Be used for regulating the electrical conductivity and the viscosity of slag.Content is low excessively, the resistance heat deficiency; Too high levels produces electric arc during built-up welding, impair technology stability, and content is controlled at 5～25%.
SiO
2Be used for reducing the fusing point of slag, improve figuration of bead.
MgO is used for composite S iO
2, the weld deposit process instability that holds it back and cause with villiaumite reaction generation gas; It can improve electrical conductivity in addition.
MnO is used for composite S iO
2And preventing the scaling loss of manganese, too high content damages the removability of slag, so be limited in below 10%.
Cr
2O
3Be used for adjusting the viscosity of slag and prevent the scaling loss of chromium, too high levels can be damaged the removability of slag, to be advisable below 10%.
ZrO
2Be used for substituting part Si O
2
The present invention adopts sintering process to produce, and sintering temperature is 500～850 ℃.
Solder flux of the present invention can mate with the stainless steel band utmost point, and the Ultra-low carbon anticorrosion layer of built-up welding corrosion resistance excellent both had been applicable to single-layer surfacing, also was applicable to double-deck built-up welding.
Compared with prior art, the present invention has following advantage:
1, the removability of slag is good, not dry slag.Owing to added Na
3AlF
6, solved the problem of removability of slag difference when containing Nb, the built-up welding of Mo steel band or dry slag effectively.
2, figuration of bead is good.Na
3AlF
6Adding, can reduce the fusing point and the interfacial tension of slag, it is wetting to help welding bead, is prone to the phenomenon of depression in the time of can preventing double-deck built-up welding.
Embodiment.
Composition has been prepared six kinds of solder flux designed according to this invention, is designated as F1～F6; In order to be compared with the prior art, according to the composition shown in 18 examples in example of the F3 in the clear 59-97793 specification table 3 and the clear 60-61195 specification table 1, prepared two kinds of solder flux Comparative Examples, be designated as F7, F8; The one-tenth of above-mentioned eight kinds of solder flux is respectively in table 1.347L, 309L, 310MoL steel band that they are thick with 0.5mm respectively, 60mm is wide are supporting, at the enterprising windrow weldering of the thick 18MnMoNb steel plate (mother metal) of 50mm test process.The chemical composition of the band utmost point and mother metal is listed in table 2, and the bead-welding technology parameter is: electric current 800A, voltage 25V, speed of welding are 150mm/min, and the bead-welding technology assay is listed in table 3.
On this basis, carried out the chemical composition check of overlay cladding.Selected two kinds of representational solder flux F4 and F8, the two kinds of steel bands of 309L, 347L with above-mentioned specification are complementary respectively, carry out double-deck built-up welding on 2 1/4 Cr-1Mo steel plates; Supporting with the 310MoL steel band of same size respectively again, on the 18MnMoNb steel plate, carry out single-layer surfacing, technological parameter sees Table 4, takes a sample from overlay cladding according to the regulation of related standards, and its chemical composition analysis the results are shown in table 5.As seen, the F4 solder flux has less silicon, the carburetting tendency of increasing.
The composition (weight %) of table 1 embodiment solder flux
Lot number CaF
2Na
3AlF
6MgF
2Al
2O
3SiO
2ZrO
2MgO Cr
2O
3MnO CaO
This F1 25 5 28 25 8071 1-
F2 30 15 10 5 10 13 8 8 1 -
Send out F3 54 5 10 15 8061 1-
F4 30 10 20 15 9 0 11 2 3 -
Bright F5 28 10 10 8 18 1 15 1 9-
F6 35 5 10 10 13 0 24 2 1 -
Than F7 48 00582 20 20 15
{。##.##1},
Example F8 49.5 05 20 90 13.5 003
The chemical composition of table 2 embodiment mother metal and steel band (weight %)
Elements C Si Mn Cr Ni Mo Nb N Fe
Material
18MnMoNb B1 0.20 0.35 1.46--0.56 0.05-surplus
2 1/4 Cr-1Mo B2 0.13 0.40 0.51 2.20-1.04--surplus
309L D1 0.016 0.34 1.65 23.74 13.23---surplus
347L D2 0.017 0.32 1.70 20.21 10.30-0.67-surplus
Surplus the 310MoL D3 0.015 0.18 5.35 24.92 22.14 2.51-0.15
The bead-welding technology performance of table 3 solder flux
Performance weld pool stability removability of slag figuration of bead
Steel band 347L 309L 310MoL 347L 309L 310MoL 347L 309L 310MoL
Solder flux
F1 - - × + √ + - - -
F2 √ √ + × - - + + +
F3 √ √ √ + + + + + -
F4 √ √ √ √ √ √ √ √ √
F5 + + - × + - + + +
F6 + + - - - - - - ×
F7 √ √ √ × × × × × ×
F8 + + + - + - - - -
Annotating: √ is fabulous+: better-: reluctantly *: bad
Table 4 embodiment bead-welding technology parameter
Parameter electric current and voltage speed of welding stem elongation degree preheating surfacing thickness
V A mm/min mm ℃
Built-up welding
Every layer of double-deck built-up welding 25 800 150 35 100～120 3()
Single-layer surfacing 25 1,200 150 35 100～120 6
The chemical composition (weight %) of table 5 embodiment overlay cladding
Composition C Si Mn Cr Ni Mo Nb N Fe
The solder flux welding
F4 joins D1, D2 0.018 0.31 1.40 20.43 10.46-0.36-surplus
F4 joins surplus the D3 0.026 0.16 4.62 22.94 20.23 2.16-0.14
F8 joins D1, D2 0.022 0.54 1.28 19.36 10.34-0.43-surplus
F8 joins surplus the D3 0.034 0.46 4.37 21.38 19.83 2.23-0.15
Claims (2)
1, a kind of strip electrode electroslag surfacing solder flux contains CaF
2, Al
2O
3, SiO
2, it is characterized in that the composition (weight %) of this solder flux is: CaF
225～55%, MgF
210～30%, Na
3AlF
65～15%, Al
2O
35～25%, SiO
25～20%, MgO5～25%, MnO1～10%, Cr
2O
31～10%.
2, solder flux according to claim 1 is characterized in that also containing ZrO in the composition of this solder flux
2≤ 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94101467 CN1030293C (en) | 1994-02-28 | 1994-02-28 | Electric slag bead welding flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94101467 CN1030293C (en) | 1994-02-28 | 1994-02-28 | Electric slag bead welding flux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1093311A CN1093311A (en) | 1994-10-12 |
| CN1030293C true CN1030293C (en) | 1995-11-22 |
Family
ID=5030177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94101467 Expired - Lifetime CN1030293C (en) | 1994-02-28 | 1994-02-28 | Electric slag bead welding flux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030293C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396427C (en) * | 2005-12-20 | 2008-06-25 | 宝鸡石油钢管有限责任公司 | High welding rate, high ductility fluorine alkaline type sintered flux |
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|---|---|---|---|---|
| CN101219509B (en) * | 2008-01-30 | 2010-11-03 | 李涛 | High-carbon high-alloy buried arc automatic weld deposit welding flux |
| CN101985194A (en) * | 2010-11-19 | 2011-03-16 | 天津市永昌焊丝有限公司 | Surfacing flux special for alloy powder transition strip surfacing |
| CN102416533B (en) * | 2011-04-27 | 2013-06-26 | 杜荣臻 | Sintered flux for filament swinging submerged arc surfacing of continuous casting roller and preparation method for sintered flux |
| CN102152029A (en) * | 2011-05-05 | 2011-08-17 | 河海大学常州校区 | Sintered flux for nitrogen alloying of surfacing metal of stainless-steel band electrode electroslag |
| CN102554515A (en) * | 2012-01-18 | 2012-07-11 | 上海金刚冶金材料有限公司 | Auxiliary fused flux of high alloy pipe screw for coal milling roll build up welding and preparation method thereof |
| CN102941421B (en) * | 2012-11-22 | 2015-02-18 | 天津市永昌焊丝有限公司 | High-alkalinity band electrode electroslag surfacing flux |
| US20150027993A1 (en) * | 2013-07-29 | 2015-01-29 | Siemens Energy, Inc. | Flux for laser welding |
| CN105215576A (en) * | 2015-09-22 | 2016-01-06 | 机械科学研究院哈尔滨焊接研究所 | A kind of nickel-base strip pole submerged arc overlay welding sintered flux and manufacture method |
| CN107900557B (en) * | 2017-11-27 | 2020-07-28 | 四川大西洋焊接材料股份有限公司 | Sintered flux matched with EQNiCrFe-7 strip surfacing and preparation method thereof |
| CN109530966B (en) * | 2018-12-25 | 2021-06-08 | 四川大西洋焊接材料股份有限公司 | Ti-containing austenitic stainless steel submerged arc sintered flux and preparation method thereof |
| CN113714684B (en) * | 2021-10-29 | 2022-02-22 | 东北大学 | Smelting flux for welding HSLA steel and preparation method thereof |
| CN116944734B (en) * | 2023-09-20 | 2023-12-01 | 东北大学 | Sintered flux for submerged arc welding of heat-resistant steel, and preparation method and application thereof |
-
1994
- 1994-02-28 CN CN 94101467 patent/CN1030293C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396427C (en) * | 2005-12-20 | 2008-06-25 | 宝鸡石油钢管有限责任公司 | High welding rate, high ductility fluorine alkaline type sintered flux |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1093311A (en) | 1994-10-12 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: GENERAL RESEARCH INST. OF IRON AND STEEL, MINISTRY OF METALLURGICAL INDUSTRY TO: ANTAI SCIENCE AND TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Antai Science and Technology Co., Ltd. Patentee before: Iron and Steel Central Research Institute of Ministry of Metallurgical Industry |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140228 Granted publication date: 19951122 |