CN1107770A - Ultra-low-hydrogen and high-basicity sintered flux - Google Patents
Ultra-low-hydrogen and high-basicity sintered flux Download PDFInfo
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- CN1107770A CN1107770A CN94106381A CN94106381A CN1107770A CN 1107770 A CN1107770 A CN 1107770A CN 94106381 A CN94106381 A CN 94106381A CN 94106381 A CN94106381 A CN 94106381A CN 1107770 A CN1107770 A CN 1107770A
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- solder flux
- low
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- flux
- hydrogen
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Abstract
The sintered flux for welding pressure container used in nuclear reactor or other important fields contains such chemical components (Wt.%) as CaCO3 (15-25), MgO (22-30), SiO2(10-15), Al2O3 (15-20), CaF2 (12-18), BaCO3 (4-9), Li2O (1-2.5), K2O (0.5-3), Na2O (0.5-3) and REMg (0.2-5%) and features obvious dephosphorizing effect and excellent welded seam performance including high strength, excellent low-temp. plasticity and toughness, and better antiradiating brittleness.
Description
The invention belongs to welding material.Mainly be applicable to the welding of nuclear reactor pressure container and other important pressure vessel.
Nuclear reactor pressure container is the equipment of most criticals such as nuclear power station, and it is maintaining the safety of whole nuclear power station and other critical facility.Welding is a topmost manufacturing process of making nuclear reactor pressure container, and welding point weakest link in this class bearing device often.In the operation process of nuclear reactor, welding point is the same with the pressure-bearing shell that it is welded, and every square centimeter will be born 1 * 10
19Therefore the impact of neutron current, not only requires welding point to have good plasticity toughness and higher intensity, but also requires to have excellent anti-radiation embrittlement performance.
In metal material and weld metal thereof, P is the element the most responsive to neutron-irradiation-induced embrittlement, not only reduces the low-temperature flexibility of weld metal, and the radiation embrittlement temperature is improved greatly, the safe operation of serious power nuclear reactor.Therefore, the solder flux as the usefulness of welding such as nuclear reactor pressure container not only requires the phosphorus content of solder flux itself low, but also requires the butt welded seam metal to have dephosphorization effect.In addition, nuclear reactor pressure container mostly is thick-walled vessel, adopts narrow-clearance submerged arc welding usually, therefore, the processing performance of solder flux, particularly deslag performance and figuration of bead is all had higher requirement.
In the solder flux of existing nuclear reactor pressure container welding usefulness, mainly contain two types of fysed flux and sintered flux, as MF-27x solder flux and clear 5395145 solder flux of being introduced Japanese " welding of atomic force generating project " (clear and in June, 60) that provided of Japan Patent, though weld metal is all had good low-temperature plasticity and toughness, but solder flux itself does not possess dephosphorizing, causes the P content of weld metal still not low.
The object of the present invention is to provide a kind of low temperature plasticity and toughness energy and narrow-clearance submerged arc welding processing performance that not only has excellence, and have significant dephosphorization effect and the good sintering flux with ultra-low hydrogen and high alkaline sintered by high temp of anti-radiation embrittlement performance.
According to above-mentioned purpose, the present invention has adopted MgO-CaO-SiO
2-Al
2O
3High basicity slag system has the dephosphorization performance in order to make solder flux, and the present invention has taked following measure:
1). improve the basicity of slag, basicity factor is that Brrw is 2.5～3.0
2). under the prerequisite that does not influence weld metal toughness, suitably increase the oxidisability of solder flux, the concrete measure that increases the solder flux oxidisability is: adopt marble, do not adopt wollastonite, marble to decompose many sintered fluxes to emit oxidizing atmosphere, realize dephosphorization under oxidizing atmosphere and do not resemble:
[P]+ 5/4 O
2＝PO
2.5
Suitably increase the oxidation rerum natura, not only help dephosphorization, but also help to reduce diffusible hydrogen content.
3). by adding CaF
2, the slag fusing point is suitably reduced, help dephosphorization.
4). partly replace CaO with BaO, thereby improve dephosphorization effect.
Simultaneously, in order to improve the processing performance of solder flux, the removability of slag of particularly narrow gap root does not add ice crystal (Na in the solder flux
3AlF
6), and add a spot of rare earth magnesium (REMg).
Based on above-mentioned consideration, concrete component of the present invention (weight %) is:
CaCO
315～25%，MgO22～30%，SiO
210～15%，AL
2O
315～20%，CaF
212～18%，BaCO
34～9%，Li
2O1～2.5%，K
2O0.5～3%，Na
2O0.5～3%，REMg0.2～5%。
On the production method of solder flux, in order to improve the processing performance of solder flux, the removability of slag of particularly narrow gap root is also brought up to sintering temperature 780～890 ℃, in addition, the final size of solder flux is controlled at 14～60 orders, is beneficial to the external waviness of refinement welding bead.
Production technology of the present invention is as follows: at first press the chemical composition batching, subsequently batch mixing; After mixing, sieve,, remove field trash in the material simultaneously by 40 mesh sieves; The powder that the sieves accent that wets, it is even to do the binding agent damping with waterglass; Then granulation, and under 100～150 ℃ of temperature, cure, be shaped at 780～890 ℃ of following high temperature sinterings of temperature at last, after sieve, promptly become finished product.
Compared with prior art, the present invention has following advantage:
(1) have significant dephosphorization effect, can make the phosphorus content of weld metal reduce by 0.02～0.03%, the phosphorus content of weld metal is lower than the welding wire phosphorus content.
(2) diffusible hydrogen content of weld metal is low, generally below 2.8ml/100g (mercury process).
(3) removability of slag is good, and figuration of bead is attractive in appearance.
Embodiment
The chemical composition of sintering flux with ultra-low hydrogen and high alkaline sintered by high temp according to the present invention has been prepared three batches of solder flux, and promptly A, B, three lot numbers of C in order to contrast, also compare test with Japanese solder flux MF-27x and Chinese solder flux HJ153, and its concrete component is as shown in table 1.Adopt A of the present invention, B, three batches of solder flux of C and Comparative Examples MF-27x solder flux, HJ153 solder flux, with corresponding welding wire 1
#, 2
#, 3
#Be complementary, the A508-3 steel plate thick to 50mm carries out narrow-clearance submerged arc welding.The chemical composition of welding wire is as shown in table 2.
Postwelding is dissected test plate (panel), chemical composition (comprising phosphorus content), tensile property, the impact flexibility of weld metal have been measured, and carried out irradiation test, and having measured the brittle transition temperature behind the predose, its result lists table 3, table 4, table 5 and table 6 respectively in.
Table 1 embodiment solder flux component (weight %)
The be complementary chemical composition (weight %) of welding wire of table 2 embodiment and Comparative Examples solder flux
The chemical composition of table 3 embodiment and Comparative Examples weld metal (weight %)
The mechanical property of table 4 embodiment and Comparative Examples weld metal
The impact flexibility KCV(J of table 5 embodiment and Comparative Examples weld metal)
41J transition temperature before and after table 6 embodiment and the Comparative Examples weld metal irradiation test
Claims (1)
1, a kind of sintering flux with ultra-low hydrogen and high alkaline sintered by high temp contains MgO, Al
2O
3, CaF
2, SiO
2, LiO
2, K
2O, Na
2O is characterized in that the component (weight %) of solder flux is: CaCO
315～25%, MgO22～30%, SiO
210～15%, Al2O
315～20%, CaF
212～18%, BaCO
34～9%, Li
2O1～2.5%, K
2O0.5～3%, Na
2O0.5～3%, REMg0.2～5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94106381A CN1034265C (en) | 1994-06-14 | 1994-06-14 | ultra-low-hydrogen and high-basicity sintered flux |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94106381A CN1034265C (en) | 1994-06-14 | 1994-06-14 | ultra-low-hydrogen and high-basicity sintered flux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1107770A true CN1107770A (en) | 1995-09-06 |
| CN1034265C CN1034265C (en) | 1997-03-19 |
Family
ID=5032525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94106381A Expired - Lifetime CN1034265C (en) | 1994-06-14 | 1994-06-14 | ultra-low-hydrogen and high-basicity sintered flux |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1034265C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722377B (en) * | 2008-10-29 | 2011-12-28 | 中冶集团建筑研究总院 | High-basicity sintered flux suitable for high-hardness submerged arc welding wire |
| CN102601544A (en) * | 2012-03-21 | 2012-07-25 | 宝鸡市宇生焊接材料有限公司 | High-alkalinity high-tenacity low-hydrogen agglomerated flux and preparation method thereof |
| CN103753046A (en) * | 2014-01-15 | 2014-04-30 | 四川大西洋焊接材料股份有限公司 | Welding flux for carbon steel submerged arc strip surfacing and preparation method for welding flux |
| CN106624460A (en) * | 2017-01-06 | 2017-05-10 | 招商局重工（江苏）有限公司 | Low-temperature steel saw sintered flux used for ships |
| CN108581271A (en) * | 2018-03-30 | 2018-09-28 | 锦州公略焊接技术有限公司 | Ocean engineering high performance sintered solder flux and its production technology |
| CN110430969A (en) * | 2017-03-31 | 2019-11-08 | 株式会社神户制钢所 | Solder flux used for submerged arc welding |
| 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 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100374238C (en) * | 2004-12-17 | 2008-03-12 | 中国船舶重工集团公司第七二五研究所 | High alkalinity, low activity, superlow hydrogen sintering type solder |
| US7727339B2 (en) * | 2005-06-06 | 2010-06-01 | Lincoln Global, Inc. | Submerged arc flux |
| CN100374239C (en) * | 2005-10-22 | 2008-03-12 | 陈娟娟 | Sintering welding agent for repairing tube mould, and its mfg. method |
| 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 |
-
1994
- 1994-06-14 CN CN94106381A patent/CN1034265C/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101722377B (en) * | 2008-10-29 | 2011-12-28 | 中冶集团建筑研究总院 | High-basicity sintered flux suitable for high-hardness submerged arc welding wire |
| CN102601544A (en) * | 2012-03-21 | 2012-07-25 | 宝鸡市宇生焊接材料有限公司 | High-alkalinity high-tenacity low-hydrogen agglomerated flux and preparation method thereof |
| CN103753046A (en) * | 2014-01-15 | 2014-04-30 | 四川大西洋焊接材料股份有限公司 | Welding flux for carbon steel submerged arc strip surfacing and preparation method for welding flux |
| CN106624460A (en) * | 2017-01-06 | 2017-05-10 | 招商局重工（江苏）有限公司 | Low-temperature steel saw sintered flux used for ships |
| CN106624460B (en) * | 2017-01-06 | 2021-06-04 | 招商局重工（江苏）有限公司 | Marine low-temperature steel submerged-arc welding sintered flux |
| CN110430969A (en) * | 2017-03-31 | 2019-11-08 | 株式会社神户制钢所 | Solder flux used for submerged arc welding |
| CN108581271A (en) * | 2018-03-30 | 2018-09-28 | 锦州公略焊接技术有限公司 | Ocean engineering high performance sintered solder flux and its production technology |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1034265C (en) | 1997-03-19 |
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Free format text: CORRECT: PATENTEE; FROM: GENERAL RESEARCH INST. OF IRON AND STEEL, MINISTRY OF METALLURGICAL INDUSTRY TO: ANTAI SCIENCE AND TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Patentee after: Antai Science and Technology Co., Ltd. Patentee before: Iron and Steel Central Research Institute of Ministry of Metallurgical Industry |
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| CX01 | Expiry of patent term |
Expiration termination date: 20140614 Granted publication date: 19970319 |