CN1133523C - Chromium-molybdenum-seel flux welding wire - Google Patents
Chromium-molybdenum-seel flux welding wire Download PDFInfo
- Publication number
- CN1133523C CN1133523C CNB011397454A CN01139745A CN1133523C CN 1133523 C CN1133523 C CN 1133523C CN B011397454 A CNB011397454 A CN B011397454A CN 01139745 A CN01139745 A CN 01139745A CN 1133523 C CN1133523 C CN 1133523C
- Authority
- CN
- China
- Prior art keywords
- flux
- welding wire
- molybdenum
- mgo
- chromium
- 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 - Fee Related
Links
Abstract
The present invention belongs to the field of weld material and relates to a flux welding wire, particularly to a chromium-molybdenum-steel flux welding wire which has a casing made of low carbon steel. The filling ratio of flux is from 10 to 20%. The flux has chemical components (weight %) as following: O3 to 6% of Ca, 6 to 10% of MgO, 4 to 7% of SiO, 0.5 to 6% of CaF2, 0.5 to 6% of NaF2, 0.5 to 6% of NaF, 0.5 to 6% of K2SiF6, 3 to 12% of CaF2 +NaF+K2 SiF6, 2.4 to 4.5% of Mo and balancing Fe, wherein CaO/MgO is from 0.1 to 1. The content of one of or the content sum of at least two of Al2O3, TiO2, ZrO2FeO, K2O and Na2O is no more than 6%. The content of one of or the content sum of at least two of Si, Mn, Ti, Al and Mg is from 11 to 22%. The present invention has good welding technological performance and excellent toughness of weld metal.
Description
Technical field
The invention belongs to welding material.Relate generally to flux-cored wire.
Background technology
Flux-cored wire can be divided into solder wire with acidity core and alkaline flux-cored wire.Solder wire with acidity core owing to have advantages such as welding procedure is good, has been widely used in the welding of carbon steel, low-alloy steel and high-alloy steel, but because weld metal toughness is low, particularly low-temperature flexibility is lower, makes its range of application be subjected to bigger restriction.And the product that alkaline flux-cored wire welded, its weld metal toughness is better, but welding procedure is relatively poor, and for this reason, applying of this class welding wire is affected.
As can be seen, in the flux-cored wire of exploitation chrome-molybdenum steel welding usefulness, people mainly concentrate the developmental research solder wire with acidity core, as clear 56-148493 of the day disclosure and the disclosed TiO that just belongs to of 57-4397 from prior art
2The type solder wire with acidity core, but also be because the toughness of weld metal is lower, be not suitable in many instances using.In order to improve the weld metal toughness of such flux-cored wire, in the research that has, also taked some measures, as disclose clear 60-68189 and 63-2592 with ZrO
2As main slag former, also use microelement Ti, Zr, N refinement weld metal crystal grain simultaneously, or in crust, add the method for alloying element Si, Mn, Cr, Mo, reduce thick ferrite crystal grain in the weld seam, improve the toughness of weld metal.But effect is not remarkable, and the toughness that promptly improves weld metal is limited.In addition, disclose flat 04-300092 and 05-77086, also adopt TiO
2As main slag former, and add micro-Nb, V in the medicine core or in the crust, or hold concurrently adding trace alloying element Ti, B, N, in the hope of refinement weld metal crystal grain, improve the toughness of weld seam.But effect is not remarkable yet, and weld metal toughness improves also limited.Flux-cored wire that Chinese patent application CN1234313 provides is a kind of tungsten argon arc welding wire of the 9CrlMoNbV of being exclusively used in steel, should not be used for the welding of conventional chrome-molybdenum steel, and the scope of application is narrower, and welding cost is also high.
Summary of the invention
The object of the present invention is to provide a kind of welding technological properties excellence, and the good chromium-molybdenum-seel flux welding wire of weld metal toughness.
At above-mentioned purpose, the medicine core chemical composition (weight %) of flux-cored wire of the present invention is:
CaO 3-6%, MgO 6-10%, and CaO/MgO 0.1-1, SiO
24-7%, CaF
20.5-6%, NaF 0.5-6%, K
2SiF
60.5-6%, and CaF
2+ NaF+K
2SiF
6Be 3-12%, Al
2O
3, TiO
2, ZrO
2, FeO, Na
2O, K
2Any or any two above sum≤6% among the O, Cr 9-12%, Mo2.4-4.5%, any or any two above sum is 11-22% among Si, Mn, Ti, Al, the Mg, surplus is Fe.
The crust of flux-cored wire is a mild steel, and the filling rate of medicine core is the 10-20% of welding wire.
Medicine core design of chemical composition is according to being described below:
CaO, MgO belong to main slag former, improve the basicity of slag, help reducing the oxygen content of weld seam, improve the toughness of weld metal; Simultaneously, CaO, MgO can obviously improve the welding technological properties of welding wire, when CaO/MgO is in certain proportion, can obtain best effect, and it is few to splash, and moulding is attractive in appearance.
SiO
2Belong to slag former, be used to regulate the fusing point and the viscosity of slag, improve the moulding of weld seam, weld seam is to wlding transition slyness.
Al
2O
3, TiO
2, ZrO
2, slag former such as FeO, can suitably add, be used to adjust the fusing point and the viscosity of slag.Na
2O, K
2Arc stabilizers such as O can suitably add, and are used for the stable arc minimizing and splash.But these composition total amounts do not answer 〉=8%.
The main deoxidier of Si, Mn reduces the oxygen content in the weld seam, improves the toughness of weld seam.Mn also is an alloying constituent simultaneously, guarantees that weld seam has high intensity and toughness.When Si, Mn too high levels, the toughness of butt welded seam is unfavorable.
Al, Mg, Ti belong to strong deoxidier, play an important role for the oxygen content that reduces weld seam.While also helps stable arc and minimizing is splashed.When their too high levels, owing to remaining too high levels in weld seam, can make weld metal intensity too high, also be unfavorable for the toughness of weld metal.
Flux-cored wire of the present invention, manufacture method is not limit, and can adopt the coiling method manufacturing, can adopt the manufacturing of seamless pipe loading method yet.The crust of welding wire adopts mild steel, and composition is not limit in principle, but from being convenient to the drawing manufacturing, is advisable less than 0.05% with C content.
Flux-cored wire of the present invention is suitable for CO
2Protection is welding Cr-Mo steel down.
Compared with prior art, major advantage of the present invention is a welding technological properties excellence, stable, and the toughness height of weld metal, and special low-temperature flexibility is good, and under-30 ℃ situation, the ballistic work Akv of weld metal is still more than 100 joules.
The specific embodiment
According to the medicine core chemical composition scope of flux-cored wire of the present invention, and to adopt mild steel be crust, and adopting method that steel band curls to prepare three batches has seam zero type φ 1.2mm flux-cored wire.The chemical composition of steel band (weight %): C 0.04%, and Si 0.01%, and Mn 0.31%, and P 0.016%, and S 0.010%, and surplus is Fe, medicinal powder filling rate 16%.The medicine core chemical composition of welding wire is as shown in table 1.
Adopting three batches of flux-cored wires, is mother metal with the Cr-Mo steel plate, has carried out soldering test.Test plate (panel) is of a size of 20 * 120 * 300mm, and the surface removal rust is dirty.
Adopt DC (-) polarity, 280A, 30V welds fast 300mm/min, CO
2, 20l/min, stem elongation 20mm welds, and observes welding process.The result shows, appearance of weld, to take off slag good, and welding process is stable, and it is few to splash.Postwelding, the sampling of butt welded seam metal, the chemical composition of check weld metal the results are shown in table 2.Another Lot sample is checked the weld metal mechanical property in accordance with regulations after 690 ℃ of heat treatment in 1 hour, the result lists table 3 in.
Welding wire drug core component (weight %) the numbering CaO MgO CaF of table 1 embodiment
2NaF K
2SiF
6SiO
2Al
2O
3TiO
2ZrO
2Surplus the FeO KO NaO Si Mn Al Mg Cr Mo Fe 1 3.5 9 3.5 0.6 4 5-2.0 1.8 0.8 1.5 12 0.2 0.4 10 3.5 surplus in the of 256 5.2 3.0 1.5 4.5 1.5-1.5 1.0 0.5 1.5 12 0.3 0.3 10 3.5 surplus 3 4.5 7.5 2.0 4.5 0.7 6.5-2.5 1.6 0.6 1.5 12 0.4 0.2 10 3.5
Table 2 embodiment metal chemical composition (weight %) numbering C Si Mn P S Cr Mo 1 0.065 0.42 1.00 0.012 0.010 1.28 0.51 2 0.060 0.42 0.98 0.014 0.009 1.28 0.52 3 0.060 0.44 0.95 0.013 0.011 1.30 0.50
The mechanical property numbering σ of the weld metal of table 3 embodiment
bσ
0.2δ
5Akv J
MPa MPa ％ 0℃ -30℃?1 650 580 26 160 120?2 660 560 25 155 105?3 680 600 26 170 100
Note: ballistic work Akv is the arithmetic mean of instantaneous value of five samples in the table.
Claims (1)
1. chromium-molybdenum-seel flux welding wire, crust is a mild steel, the filling rate of medicine core is 10-20%, it is characterized in that the chemical composition of medicine core, by its percentage by weight is:
CaO 3-6%, MgO 6-10%, and CaO/MgO is 0.1-1, SiO
24-7%, CaF
20.5-6%, NaF 0.5-6%, K
2SiF
60.5-6%, and CaF
2+ NaF+K
2SiF
6Be 3-12%, Al
2O
3, TiO
2, ZrO
2, FeO, K
2O, Na
2Any or any two above sum≤6% among the O, Cr 9-12%, Mo 2.4-4.5%, any or any two above sum is 11-22% among Si, Mn, Ti, Al, the Mg, surplus is Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011397454A CN1133523C (en) | 2001-11-30 | 2001-11-30 | Chromium-molybdenum-seel flux welding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011397454A CN1133523C (en) | 2001-11-30 | 2001-11-30 | Chromium-molybdenum-seel flux welding wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1358605A CN1358605A (en) | 2002-07-17 |
| CN1133523C true CN1133523C (en) | 2004-01-07 |
Family
ID=4675380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011397454A Expired - Fee Related CN1133523C (en) | 2001-11-30 | 2001-11-30 | Chromium-molybdenum-seel flux welding wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1133523C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5236309B2 (en) * | 2007-03-29 | 2013-07-17 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding |
| CN101518860B (en) * | 2008-02-26 | 2011-09-28 | 中国船舶重工集团公司第七二五研究所 | Agglomerated flux for strip submerged arc surfacing |
| WO2011048558A2 (en) * | 2009-10-21 | 2011-04-28 | Illinois Tool Works Inc. | Weld wire, the usage of the weld wire and a method of manufacturing electricity power tower |
| CN102642103B (en) * | 2012-04-13 | 2014-10-01 | 武汉铁锚焊接材料股份有限公司 | Metal powder core type flux-cored wire for welding chromium-molybdenum steel, preparation and application of metal powder core type flux-cored wire |
| CN105014261B (en) * | 2015-07-30 | 2017-08-04 | 武汉铁锚焊接材料股份有限公司 | A kind of chrome-molybdenum steel seamless metal powder core type flux-cored wire |
| CN105057916A (en) * | 2015-07-30 | 2015-11-18 | 洛阳双瑞特种合金材料有限公司 | Stainless steel flux-cored wire capable of receiving postweld heat treatment |
-
2001
- 2001-11-30 CN CNB011397454A patent/CN1133523C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1358605A (en) | 2002-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101450425B (en) | Heat-resisting steel flux-cored wire | |
| US4465921A (en) | Flux-cored wire for gas-shielded arc welding | |
| CN101658987B (en) | Flux-cored wire | |
| WO2011074689A1 (en) | Wire containing flux for gas-sealed arc welding, allowing all-position welding | |
| CN102430877A (en) | Metal powder type flux-cored wire and preparation and application thereof | |
| US4843212A (en) | Composition of welding wire | |
| CN103223562A (en) | Solder for single-surface submerged-arc welding | |
| KR20030021397A (en) | Basic flux cored wire | |
| CN103223563A (en) | Solder for single-surface submerged-arc welding | |
| CN106736020A (en) | Heat-resistant steel flux-cored wire | |
| CN101041215A (en) | High-alloy martensite type refractory steel air-protecting flux-cored wire | |
| CN1133523C (en) | Chromium-molybdenum-seel flux welding wire | |
| JP6502887B2 (en) | Flux-cored wire for gas shielded arc welding | |
| CN101041213A (en) | Metal powder core filler metal for welding of high-tensile steel | |
| CN104785954B (en) | A kind of high-intensity high-tenacity alkaline flux-cored wire | |
| CN1117902A (en) | Titanium-type gas shielded flux-cored welding stick | |
| CN100457372C (en) | Refractory steel alkaline flux-cored wire with excellent removability of slag | |
| EP0798070B1 (en) | Flux cored wire electrode for arc welding | |
| JPH08257791A (en) | Low hydrogen covered electrode | |
| JPS632592A (en) | Flux cored wire for low alloy heat resistant steel welding | |
| JP2021109200A (en) | Iron powder low hydrogen type coated arc welding electrode | |
| JPH0378197B2 (en) | ||
| JPH03291192A (en) | Flux cored wire for gas shielded arc welding | |
| JPH05269592A (en) | Flux cored wire for gas shielded arc welding | |
| CN102267018A (en) | Flux-cored wire for gas shielded welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| ASS | Succession or assignment of patent right |
Owner name: ANTAI SCIENCE AND TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: ANTAI SCIENCE AND TECHNOLOGY CO., LTD.; IRON AND STEEL RESEARCH GEUERAL INST. Effective date: 20070914 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070914 Address after: 100081 No. 76 South College Road, Beijing Patentee after: Antai Science and Technology Co., Ltd. Address before: 100081 No. 76 South College Road, Beijing Co-patentee before: Central Iron & Steel Research Institute Patentee before: Antai Science and Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040107 Termination date: 20161130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |