CN102728969B - 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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- CN102728969B CN102728969B CN201210255117.5A CN201210255117A CN102728969B CN 102728969 B CN102728969 B CN 102728969B CN 201210255117 A CN201210255117 A CN 201210255117A CN 102728969 B CN102728969 B CN 102728969B
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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 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 new type railway assembled frog and repair welding rod special for special.And can directly repair, make the intensity, toughness, hardness, wearability of repair layer in extremely frigid zones and novel assembled frog Performance Match.
Background technology
Along with China railways fast development, in recent years, develop and applied high-performance, long-life bainite assembled frog and bainite rail at railway track and railroad frog, its main damage form is central body of frog and rail under the repeated stock of train wheel track and pressure, flecition, there are fatigue flake and wearing and tearing in working face, its repairing method is that repair welding is carried out at scene.Mainly the potassium steel series surfacing weldings such as KD286 at the surfacing welding of railroad frog repair welding and reparation use at present, and Chinese patent 89209854.6,94112743.5,95110760.7 all belongs to potassium steel series surfacing welding, all develop in order to meet high manganese steel frog.Simultaneously traditional U71Mn rail, no matter be full quench steel rail or sensitive surface quenched rail, its repair welding and reparation welding rod are mainly J306, and when soldering, need preheating and after welding treatment, for site operation and reparation bring very big inconvenience, increase cost, at present research is badly in need of under preheating condition not in the railway system, can field repair and the new type of electrode of repair welding rail.For high-performance bainite assembled frog, existing patent ZL200610020694.0 (railway track and assembled frog bainite welding rod dedicated for repairing) starts application reparation, and this welding rod is relatively good at general regional effect at present, applies at extremely frigid zones, fragility is large, and serviceability is poor; Need invention one class to repair welding rod special for special at the new type railway assembled frog of extremely frigid zones application.
Summary of the invention
In order to meet the needs of novel high-performance, long-life bainite assembled frog and bainite rail repair welding and reparation of extremely frigid zones application, and the deficiency that overcomes existing railway track repair welding and repair the surfacing welding using, the railway assembled frog that the invention provides a kind of extremely frigid zones application is bainite welding rod dedicated, this surfacing welding weldering is front 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:
(1) core wire is H08A or H08Mn or H08MnA welding wire.
(2) the composition of electrode coating and percentage by weight are respectively:
The weight percent proportioning of the each component of coating is: marble: 15～50%, fluorite: 5～20%, quartz: 5～20%, titanium dioxide: 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 small amount of vanadium iron: 0.05-0.3%.
On the basis of above-mentioned formula, 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.
(3) composition and the percentage by weight of built-up welding reparation cladding layer 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.
In above-mentioned coating, also can also contain ferrotianium: 0.05-0.3%, vanadium iron: 0.05-0.3%, its percentage is percetage by weight.
The present invention is directed to the reparation of extremely frigid zones new type railway assembled frog, needs are wear-resisting, low-temperature flexibility good, repair layer long service life.Have the following advantages:
1, because welding rod provided by the invention can be in the repair welding of bainite rail and bainite assembled frog and repairing, make the cladding layer that built-up welding is repaired form bainite structure, thereby can mate completely with the tissue morphology of welded object.
2, owing to containing ferrotianium, ferrosilicon, rare earth in welding rod provided by the invention, thereby can utilize their combined deoxidations, reduce the content of weld metal diffusible hydrogen and oxide inclusion, thereby toughness and the compactness of repair welding, repair layer are provided.
3, due to selection of electrodes provided by the invention marble-fluorite slag system, make whole coating be alkaline low-hydrogen, the basicity of coating is 2.0～4.0, in addition the weight ratio of coating and core wire is 0.4～1.0, thereby improve alloying element by coating the excessive coefficient to cladding layer, increase the crack resistance of welding cladding layer.
4, owing to containing crome metal, molybdenum, rare earth and vanadium titanium in welding rod provided by the invention, thereby can make repair welding, the refinement of repair layer metal grain, form bainite (granular bainite) tissue, ensure repair welding, good hardness, toughness and the wearability of repair layer, and higher low-temperature flexibility.
5, because welding rod provided by the invention can be in the repair welding of bainite rail and bainite assembled frog and repairing, make the cladding layer that built-up welding is repaired form all good bainite structures of tough, wearability, thus can significant prolongation rail and assembled frog repair welding, service life after repairing.
6, because welding rod provided by the invention is to railway track, the assembled frog of fatigue wear carry out Welding Repair, not only can realize not preheating before weldering, not heat treatment of postwelding, simplify welding procedure, reduce the excellent weldability of welding cost, and welding makes arc stability good, splash less, fusing coefficient is large, 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 repair welding and the reparation of bainite rail and bainite assembled frog, also be applicable to repair welding and the reparation of traditional U71Mn rail simultaneously, and can overcome existing welding rod soldering and make to need preheating, postwelding also needs heat treated shortcoming.
Detailed description of the invention
Also the invention will be further described to provide embodiment below.But given embodiment can not be interpreted as limiting the scope of the invention, thereby nonessential improvement and adjustment that 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.
Percentage used in following examples, in case of no particular description, is percetage by weight; The waterglass adopting 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 H08Mn welding wire, and the proportioning of the each component of coating is: marble 40%, fluorite 15%, quartz 12%, titanium dioxide 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 adding in coating counts 30% taking coating dry powder formulation as benchmark.Welding rod baking process: 300～350 DEG C, 2～3 hours.
Embodiment 2
The present embodiment core wire is H08MnA welding wire, and the proportioning of the each component of coating is: marble 40%, fluorite 17%, quartz 8%, titanium dioxide 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 adding in coating counts 20% taking coating dry powder formulation as benchmark.Welding rod baking process: 300～350 DEG C, 2～3 hours.
Embodiment 3
The present embodiment core wire is H08MnA welding wire, and the proportioning of the each component of coating is: marble 45%, fluorite 10%, quartz 8%, titanium dioxide 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 adding in coating counts 10% taking coating dry powder formulation as benchmark.Welding rod baking process: 300～350 DEG C, 2～3 hours.
Embodiment 4
The present embodiment core wire is H08MnA welding wire, and the proportioning of the each component of coating is: marble 38%, fluorite 15%, quartz 10%, titanium dioxide 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 adding in coating counts 25% taking coating dry powder formulation as benchmark.Welding rod baking process: 300～350 DEG C, 2～3 hours.
Embodiment 5
The present embodiment core wire is H08A welding wire, and the proportioning of the each component of coating is: marble 48%, fluorite 15%, quartz 10%, titanium dioxide 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 adding in coating counts 30% taking coating dry powder formulation as benchmark.Welding rod baking process: 300～350 DEG C, 2～3 hours.
Embodiment 6
The present embodiment core wire is H08Mn welding wire, and the proportioning of the each component of coating is: marble 46%, fluorite 15%, quartz 12%, titanium dioxide 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 adding in coating counts 25% taking coating dry powder formulation as benchmark.Welding rod baking process: 300～350 DEG C, 2～3 hours.
For welding the joint welding of bainitic steel combined frog crossing point rail, adopt performance indications that GB/T229-1994 and GB228-87 standard record its weld seam center in table 1 welding rod provided by the invention:
Table 1
Welding rod provided by the invention, for after the repair welding of bainitic steel rail, is recorded to the performance indications of hardness of its repair layer in table 2:
Show from table 1,2 shown results, welding rod provided by the invention is at Railway Site soldering combined frog crossing point rail and rail, and its welding procedure is good, and wearability is good, and can obtain and the hard repair layer such as strong such as central body of frog.
Claims (3)
1. one kind is applicable to extremely frigid zones railway track and railway assembled frog reparation welding rod special for special, H08A or H08Mn or H08MnA welding wire for its core wire, the weight percent proportioning of the each component of coating is: marble: 15～50%, fluorite: 5～20%, quartz: 5～20%, titanium dioxide: 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 small amount of vanadium iron: 0.05-0.3%, and on the basis of above-mentioned formula, add 10～30% waterglass as binding agent.
2. welding rod special for special according to claim 1, it is characterized in that, composition and percentage by weight that cladding layer is repaired in built-up welding are respectively: Cr:0.5～2%, 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. welding rod special for special according to claim 2, is characterized in that, cladding layer composition also has trace Ti: 0.05～0.2%, 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 |
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| 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 CN102728969A (en) | 2012-10-17 |
| CN102728969B true CN102728969B (en) | 2014-07-02 |
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| 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 |
| CN109226996B (en) * | 2018-11-19 | 2021-08-03 | 重庆延祥轨道交通设备有限责任公司 | Electric welding rod for repairing switch welding of austempered steel and preparation method thereof |
| CN111590236B (en) * | 2019-11-26 | 2022-04-01 | 北京特冶工贸有限责任公司 | Welding rod for bainite steel electric arc welding |
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 |
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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 |
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