CN102728969A - Welding rod special for repair of bainitic steel composite frog of high-cold area railway - Google Patents
Welding rod special for repair of bainitic steel composite frog of high-cold area railway Download PDFInfo
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- CN102728969A CN102728969A CN2012102551175A CN201210255117A CN102728969A CN 102728969 A CN102728969 A CN 102728969A CN 2012102551175 A CN2012102551175 A CN 2012102551175A CN 201210255117 A CN201210255117 A CN 201210255117A CN 102728969 A CN102728969 A CN 102728969A
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Abstract
A welding rod special for repair of a bainitic steel composite frog of a high-cold area railway is provided. A welding core can adopt an H08A or H08Mn or H08MnA welding wire and the electrode covering is prepared from (by weight) 15-50% of marble, 5-20% of fluorite, 5-20% of quartz, 1-10% of titanium pigment, 2-10% of rare earth ferrosilicon, 5-20% of ferrotitanium, 1-10% of ferrosilicon, 1-8% of ferrochromium, 0.1-5% of ferromolybdenum, 0.1-5% of metal nickel, a small amount of ferrotitanium and ferrovanadium (0.05-0.3%), and 10-30% of water glass. The overlay-welded melt coated layer is made from a material which is prepared from 0.5-2% of Cr, 1-3% of Si, 0.1-2% of Mo, 0.1-2% of Ni, 0.1-0.3% of C, a trace amount of Ti, V and rare earth, and Fe and impurity with total content smaller than 0.5%. The obtained repaired melt coated layer has a bainite structure with good impact toughness and wear resistance, is good in welding property and low-temperature availability, and remarkably prolongs the service life of bainitic steel rail and composite frog repaired. The inventive welding rod simplifies welding process and can be directly used for welding on field without preheating.
Description
Technical field
The invention belongs to welding technology field, particularly relate to a kind of extremely frigid zones railway novel combination railway frog and repair welding rod special for special.And can directly repair, the intensity, toughness, hardness, wearability that make repair layer are in extremely frigid zones and novel combination railway frog Performance Match.
Background technology
Along with China railways is fast-developing; In recent years; Developed and used high-performance, long-life bainite assembled frog and bainite rail at railway track and railroad frog; Its main failure mode is central body of frog and rail under the repeated stock of train wheel track and pressure, flecition, and fatigue flake and wearing and tearing appear in working face, and its reparation way is that repair welding is carried out at the scene.Mainly be potassium steel series surfacing weldings such as KD286 in the railroad frog repair welding with repairing the surfacing welding that uses at present; And Chinese patent 89209854.6,94112743.5,95110760.7 all belongs to potassium steel series surfacing welding, all develops in order to satisfy high manganese steel frog.While traditional U 71Mn rail; No matter be full quench steel rail or sensitive surface quenched rail, its repair welding mainly is J306 with repairing welding rod, and needs preheating and after welding treatment during soldering; For site operation and reparation bring very big inconvenience; Increase cost, research is badly in need of under preheating condition not in the railway system at present, can field repair and the new type of electrode of repair welding rail.To high-performance bainite assembled frog; Existing patent ZL200610020694.0 (railway track and assembled frog bainite welding rod dedicated for repairing) begins to use reparation, and this welding rod is relatively good at general regional effect at present, uses at extremely frigid zones; Fragility is big, and serviceability is poor; Need one type of railway novel combination railway frog of using at extremely frigid zones of invention to repair welding rod special for special.
Summary of the invention
In order to satisfy the needs of novel high-performance, long-life bainite assembled frog and bainite rail repair welding and reparation that extremely frigid zones uses; And the deficiency that overcomes existing railway track repair welding and repair the surfacing welding that uses, the railway assembled frog that the present invention provides a kind of extremely frigid zones to use is bainite welding rod dedicated, and this surfacing welding weldering is preceding without preheating; Postwelding is without heat treatment; Arc stability, welding performance is better, and cryogenic property is good.
The railway assembled frog that the invention provides a kind of extremely frigid zones application is bainite welding rod dedicated, and its technical scheme is: the ⑴ core wire is HO8A or HO8Mn or HO8MnA welding wire.
⑵ the composition and the percentage by weight of electrode coating are respectively: the weight percent proportioning of each component of coating is: marble: 15 ~ 50%, and fluorite: 5 ~ 20%, quartz: 5 ~ 20%; Titanium white powder: 1-10%, rare earth ferrosilicon: 2 ~ 10%, ferrotianium: 5 ~ 20%; Ferrosilicon: 1 ~ 10%, ferrochrome: 1 ~ 8%, molybdenum-iron: 0.1 ~ 5%; Metallic nickel: 0.1 ~ 5%, a spot of ferrotianium, vanadium iron (0.05-0.3%).On the basis of above-mentioned prescription, add 10 ~ 30% waterglass (potassium sodium mixing water glass), the ratio of potassium-sodium water glass is 1:3, and modulus (M) is 2.8 ~ 3.2, and concentration is about 45 ~ 47 ° of Be.
⑶ composition and percentage by weight that cladding layer is repaired in built-up welding are respectively: Cr:0.5 ~ 2%, and Si:1 ~ 3%, Mo:0.1 ~ 2%, Ni:0.1 ~ 2%, C:0.1 ~ 0.3%, trace rare-earth, all the other are the impurity of iron and total amount＜0.5%.The weight ratio of above-mentioned coating and core wire is 0.4 ~ 1.0.Also can also contain ferrotianium: 0.05-0.3% in the above-mentioned coating, vanadium iron: 0.05-0.3%, its percentage are percetage by weight.
The present invention is directed to the reparation of extremely frigid zones railway novel combination railway frog, needs are wear-resisting, low-temperature flexibility good, the repair layer long service life.Have the following advantages:, thereby can mate fully with the tissue morphology of quilt weldering object 1, because welding rod provided by the invention can be in the repair welding and reparation of bainite rail and bainite assembled frog, and the cladding layer that built-up welding is repaired forms bainite structure.
2, contain ferrotianium, ferrosilicon, rare earth owing in the welding rod provided by the invention, thereby can utilize their combined deoxidations, reduce the content of weld metal diffusible hydrogen and oxide inclusion, thereby the toughness and the compactness of repair welding, repair layer are provided.
3, because welding rod provided by the invention has been selected marble-fluorite slag system for use; Make whole coating be alkaline low-hydrogen property; The basicity of coating is 2.0 ~ 4.0; The weight ratio of coating and core wire is 0.4 ~ 1.0 in addition, thereby improves alloying element by the excessive coefficient of coating to cladding layer, increases the crack resistance of welding cladding layer.
4, owing to contain crome metal, molybdenum, rare earth and vanadium titanium in the welding rod provided by the invention; Thereby can make repair welding, the refinement of repair layer metal grain; Form bainite (granular bainite) tissue, hardness, toughness and wearability that assurance repair welding, repair layer are good and higher low-temperature flexibility.
5, because welding rod provided by the invention can be in the repair welding and reparation of bainite rail and bainite assembled frog; The cladding layer that built-up welding is repaired forms tough, all good bainite structures of wearability, thus can the significant prolongation rail with assembled frog repair welding, reparation after service life.
6,, not only can realize not preheating before the weldering, not heat treatment of postwelding because welding rod provided by the invention carries out Welding Repair to railway track, the assembled frog of fatigue wear; Simplify welding procedure, reduce the excellent weldability of welding cost, and welding makes arc stability good; It is less to splash; Fusing coefficient is big, and the removability of slag is good, and appearance of weld is good.
7, welding rod provided by the invention is not only applicable to the repair welding and the reparation of bainite rail and bainite assembled frog; Also be applicable to simultaneously the repair welding and the reparation of traditional U 71Mn rail; And can overcome existing welding rod soldering and make and need preheating, postwelding also needs heat treated shortcoming.
The specific embodiment
Provide embodiment below and the present invention is further described.But given embodiment can not be interpreted as the restriction to protection domain of the present invention, thereby nonessential improvement and adjustment that the professional and technical personnel has done according to the content of the invention described above also should belong to protection scope of the present invention.
Used percentage in following examples is not having to be percetage by weight under the situation about specifying; The waterglass that adopts is potassium-sodium water glass, and the ratio of its potassium, sodium silicate is 1:3.Modulus (M) is 2.8 ~ 3.2, and concentration is 45 ~ 47 ° of Be.
Embodiment 1
The present embodiment core wire is the H08Mn welding wire, and the proportioning of each component of coating is: marble 40%, fluorite 15%, quartzy 12%; Titanium white powder 4%, rare earth ferrosilicon 8%, ferrotianium 8%, ferrosilicon 5.5%; Ferrochrome 4%, molybdenum-iron 2%, metallic nickel 2%; Ferrotianium 0.3%, vanadium iron 0.2%, the waterglass bonding agent that in coating, adds are that benchmark counts 30% with the coating dry powder formulation.The welding rod baking process: 300 ~ 350
, 2 ~ 3 hours.
Embodiment 2
The present embodiment core wire is the H08MnA welding wire, and the proportioning of each component of coating is: marble 40%, fluorite 17%, quartzy 8%; Titanium white powder 6%, rare earth ferrosilicon 8%, ferrotianium 9.7%; Ferrosilicon 4%, ferrochrome 3%, molybdenum-iron 2%; Metallic nickel 2%, vanadium iron 0.3%, the waterglass bonding agent that in coating, adds are that benchmark counts 20% with the coating dry powder formulation.The welding rod baking process: 300 ~ 350
, 2 ~ 3 hours.
Embodiment 3
The present embodiment core wire is the H08MnA welding wire, and the proportioning of each component of coating is: marble 45%, fluorite 10%, quartzy 8%; Titanium white powder 8%, rare earth ferrosilicon 8%, ferrotianium 5.8%; Ferrosilicon 6%, ferrochrome 4%, molybdenum-iron 3%; Metallic nickel 2%, ferrotianium 0.2%, the waterglass bonding agent that in coating, adds are that benchmark counts 10% with the coating dry powder formulation.The welding rod baking process: 300 ~ 350
, 2 ~ 3 hours.
Embodiment 4
The present embodiment core wire is the H08MnA welding wire, and the proportioning of each component of coating is: marble 38%, fluorite 15%, quartzy 10%; Titanium white powder 8%, rare earth ferrosilicon 10%, ferrotianium 5.8%; Ferrosilicon 5%, ferrochrome 4%, molybdenum-iron 3%; Metallic nickel 1%, vanadium iron 0.2%, the waterglass bonding agent that in coating, adds are that benchmark counts 25% with the coating dry powder formulation.The welding rod baking process: 300 ~ 350
, 2 ~ 3 hours.
Embodiment 5
The present embodiment core wire is the H08A welding wire, and the proportioning of each component of coating is: marble 48%, fluorite 15%, quartzy 10%; Titanium white powder 3%, rare earth ferrosilicon 5.5%, ferrotianium 6%, ferrosilicon 5%; Ferrochrome 3%, molybdenum-iron 3%, metallic nickel 1%; Ferrotianium 0.2%, vanadium iron 0.3%, the waterglass bonding agent that in coating, adds are that benchmark counts 30% with the coating dry powder formulation.The welding rod baking process: 300 ~ 350
, 2 ~ 3 hours.
Embodiment 6
The present embodiment core wire is the H08Mn welding wire, and the proportioning of each component of coating is: marble 46%, fluorite 15%, quartzy 12%; Titanium white powder 6%, rare earth ferrosilicon 5%, ferrotianium 5%; Ferrosilicon 4.7%, ferrochrome 3%, molybdenum-iron 2%; Metallic nickel 1%, vanadium iron 0.3%, the waterglass bonding agent that in coating, adds are that benchmark counts 25% with the coating dry powder formulation.The welding rod baking process: 300 ~ 350
, 2 ~ 3 hours.
Welding rod provided by the invention is used to weld the joint welding of bainitic steel combined frog crossing point rail, and the performance indications that adopt GB/T229-1994 and GB228-87 standard to record its center are seen table 1:
Table 1
| Tensile strength (σ b) impact flexibility (room temperature) impact flexibility (30 ℃) hardness (HRC) |
| 700~1000MPa 60~100J/cm 2 30~50J/cm 2 32~45 |
After welding rod provided by the invention was used for the repair welding of bainitic steel rail, the performance indications that record the hardness of its repair layer were seen table 2:
Table 2
| Heat affected area, weld seam center matrix |
| HRC30~45 HRC40~45 HRC36~45 |
Show that from table 1,2 result displayed welding rod provided by the invention is at on-the-spot soldering combined frog crossing point rail of railway and rail, its welding procedure property is good, and wearability is good, and can obtain and hard repair layers such as central body of frog etc. is strong.
Claims (3)
1. the present invention is that a kind of extremely frigid zones railway track and railway assembled frog of being applicable to repaired welding rod special for special, and its core wire can be with HO8A or HO8Mn or HO8MnA welding wire, and the weight percent proportioning of each component of coating is: marble: 15 ~ 50%; Fluorite: 5 ~ 20%, quartz: 5 ~ 20%, titanium white powder: 1-10%; Rare earth ferrosilicon: 2 ~ 10%, ferrotianium: 5 ~ 20%, ferrosilicon: 1 ~ 10%; Ferrochrome: 1 ~ 8%, molybdenum-iron: 0.1 ~ 5%, metallic nickel: 0.1 ~ 5%; A spot of ferrotianium, vanadium iron (0.05-0.3%), and on the basis of above-mentioned prescription, the waterglass of adding 10 ~ 30% is as binding agent.
2. according to claim 1, composition and percentage by weight that cladding layer is repaired in built-up welding are respectively: Cr:0.5 ~ 2%, and Si:1 ~ 3%, Mo:0.1 ~ 2%, Ni:0.1 ~ 2%, C:0.1 ~ 0.3%, trace rare-earth, all the other are the impurity of iron and total amount＜0.5%.
3. according to claim 1,2, the cladding layer composition also can have trace Ti: 0.05 ~ 0.2%, and V:0.05 ~ 0.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255117.5A CN102728969B (en) | 2012-07-23 | 2012-07-23 | Welding rod special for repair of bainitic steel composite frog of high-cold area railway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210255117.5A CN102728969B (en) | 2012-07-23 | 2012-07-23 | Welding rod special for repair of bainitic steel composite frog of high-cold area railway |
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| CN102728969A true CN102728969A (en) | 2012-10-17 |
| CN102728969B CN102728969B (en) | 2014-07-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106181125A (en) * | 2016-08-30 | 2016-12-07 | 四川大西洋焊接材料股份有限公司 | Exempt from application bridge steel high-performance weather-proof steel welding rod and preparation method thereof |
| CN109226996A (en) * | 2018-11-19 | 2019-01-18 | 重庆延祥轨道交通设备有限责任公司 | A kind of Austria's shellfish body steel track switch soldering welding rod and preparation method thereof |
| CN111590236A (en) * | 2019-11-26 | 2020-08-28 | 北京特冶工贸有限责任公司 | Welding rod for bainite steel electric arc welding |
Citations (4)
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|---|---|---|---|---|
| CN1827288A (en) * | 2006-04-12 | 2006-09-06 | 西华大学 | Bainite welding rod dedicated for repairing rail and assembled frog |
| RU2007107747A (en) * | 2007-03-01 | 2008-09-10 | Государственное образовательное учреждение Высшего профессионального образовани "Омский государственный технический университет" (RU) | POWDER WIRE |
| CN101905395A (en) * | 2010-07-30 | 2010-12-08 | 西安理工大学 | Low-hydrogen basic electrode for welding FV520 (B) stainless steel |
| CN102198574A (en) * | 2011-05-25 | 2011-09-28 | 燕山大学 | Special welding strip for surfacing-repairing and remanufacturing cold working mold |
-
2012
- 2012-07-23 CN CN201210255117.5A patent/CN102728969B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1827288A (en) * | 2006-04-12 | 2006-09-06 | 西华大学 | Bainite welding rod dedicated for repairing rail and assembled frog |
| RU2007107747A (en) * | 2007-03-01 | 2008-09-10 | Государственное образовательное учреждение Высшего профессионального образовани "Омский государственный технический университет" (RU) | POWDER WIRE |
| CN101905395A (en) * | 2010-07-30 | 2010-12-08 | 西安理工大学 | Low-hydrogen basic electrode for welding FV520 (B) stainless steel |
| CN102198574A (en) * | 2011-05-25 | 2011-09-28 | 燕山大学 | Special welding strip for surfacing-repairing and remanufacturing cold working mold |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106181125A (en) * | 2016-08-30 | 2016-12-07 | 四川大西洋焊接材料股份有限公司 | Exempt from application bridge steel high-performance weather-proof steel welding rod and preparation method thereof |
| CN106181125B (en) * | 2016-08-30 | 2018-06-19 | 四川大西洋焊接材料股份有限公司 | Exempt from application bridge steel high-performance weather-proof steel welding rod and preparation method thereof |
| CN109226996A (en) * | 2018-11-19 | 2019-01-18 | 重庆延祥轨道交通设备有限责任公司 | A kind of Austria's shellfish body steel track switch soldering welding rod and preparation method thereof |
| CN111590236A (en) * | 2019-11-26 | 2020-08-28 | 北京特冶工贸有限责任公司 | Welding rod for bainite steel electric arc welding |
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| CN102728969B (en) | 2014-07-02 |
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Granted publication date: 20140702 Termination date: 20180723 |