CN100386174C - Bainite welding rod dedicated for repairing rail and assembled frog - Google Patents
Bainite welding rod dedicated for repairing rail and assembled frog Download PDFInfo
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- CN100386174C CN100386174C CNB2006100206940A CN200610020694A CN100386174C CN 100386174 C CN100386174 C CN 100386174C CN B2006100206940 A CNB2006100206940 A CN B2006100206940A CN 200610020694 A CN200610020694 A CN 200610020694A CN 100386174 C CN100386174 C CN 100386174C
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Abstract
The present invention relates to a special bainite welding rod for repairing railway tracks and assembled frogs, which is composed of a welding core and a coating, wherein the welding core is an HO8A or HO8Mn or HO8MnA or H08Mn2SiA or H08Mn2MoA welding wire, and the coating comprises the components of 30 to 50% of marble, 10 to 20% of fluorite, 5 to 20% of quartz, 1-10% of titanium white powder, 2 to 10% of rare earth ferrosilicon, 3 to 20% of ferrotitanium, 5 to 20% of manganese iron, 1 to 5% of ferrosilicon, 1 to 8% of ferrochromium, 0.1 to 5% of ferromolybdenum, 0.1 to 5% of metallic nickel and 10 to 30% of water glass binder measured by the total weight of a dry powder formula of the coating as a reference. The welding rod provided by the present invention has excellent welding performance and service performance; the welding rod can increase the toughness and the compactness of a repairing welding layer and a repairing layer, increase the crack resistance of a welding fusion coating layer, obtain a bainite structure with excellent impact toughness and excellent abrasion resistance, and obviously prolong the service life of the railway tracks and the assembled frogs after repairing welding and repair. Moreover, the welding technology can be simplified, and field welding can be directly carried out without preheating.
Description
One, technical field
The invention belongs to the used welding rod technical field of welding, particularly a kind of railway track and assembled frog bainite welding rod dedicated for repairing of being used for.This welding rod can directly carry out REPAIR WELDING, and intensity, toughness, hardness, the wearability of repair layer are better than or approaching rail and the central body of frog of being repaired.
Two, background technology
In order to adapt to the needs of China railways speed-raising development, in recent years, the traditional railway rail and the railroad crossing of high manganese steel change that have begun will use originally in some highway sections were high-performance, long-life bainite rail and bainite assembled frog.Though bainite rail and bainite assembled frog compare to traditional railway rail and railroad crossing of high manganese steel, in wearability, shock resistance and resistance to compression, better aspect counter-bending, service time is longer, but under the train wheel track repeated stock of running at high speed and pressure, flecition, working face at rail and central body of frog still fatigue flake and wearing and tearing can occur, need repair, and repair quick, the most most economical method is exactly to carry out repair welding at the scene, otherwise will influence the operation of train to a certain extent.
At present, used welding rod in railroad frog repair welding and reparation, no matter be the surfacing welding KD286 that often uses, still CN89209854.6, CN94112743.5, CN95110760.7, disclosed welding rod such as CN03128766.2 all belongs to the serial surfacing welding of potassium steel; Used welding rod in railway track repair welding and reparation also belongs to high carbon and high manganese steel series surfacing welding as the disclosed welding rod of CN03141909.7.Obviously, these potassium steel series surfacing weldings or high carbon and high manganese steel series surfacing welding, all be to develop, so these welding rods are difficult to satisfy the repair welding of high-performance bainite rail and bainite assembled frog and repair requirement at the repair welding of traditional railway rail and high manganese steel frog and reparation.In addition, for traditional U71Mn rail, no matter be full quench steel rail or sensitive surface quenched rail, what its repair welding and reparation welding rod mainly adopted is the J306 welding rod.Need preheating when the shortcoming of this welding rod is soldering, postwelding also need be handled, and this not only increases cost, also brings very big inconvenience for site operation and reparation.
Three, summary of the invention
The objective of the invention is defective at prior art, a kind of railway track and assembled frog bainite welding rod dedicated for repairing are provided, this welding rod not only can satisfy the needs of novel high-performance, long-life bainite rail and repair welding of bainite assembled frog and reparation, can also be used for the repair welding of existing traditional railway rail and repair instructions for use, and this welding rod weldering is preceding without preheating, postwelding is without heat treatment, arc stability, and welding performance is better.
Railway track provided by the invention and assembled frog bainite welding rod dedicated for repairing, this welding rod is made up of core wire and coating, core wire is H08A or H08Mn or H08MnA or H08Mn2SiA or H08Mn2MoA welding wire, contain in the compositions of surfacing metal: marble 30～50%, fluorite 10～20%, quartzy 5～20%, titanium dioxide 1-10%, rare earth ferrosilicon 2～10%, ferrotianium 3～20%, ferromanganese 5～20%, ferrosilicon 1～5%, ferrochrome 1～8%, molybdenum-iron 0.1～5%, metallic nickel 0.1～5% and be the sodium silicate binder of benchmark 10～30% in coating dry powder formulation gross weight, the percentage of each component of coating is percetage by weight.
Also can contain ferro-boron 0～3% in the above-mentioned coating, vanadium iron 0-0.3%, its percentage also are percetage by weight.
Used waterglass is potassium sodium mixing water glass in the above-mentioned coating, and the ratio of potassium-sodium water glass is 1: 3, and modulus (M) is 2.8～3.2, and concentration is 45～47 ° of Be.
The weight ratio of above-mentioned coating and core wire is 0.4～1.0.
Composition and percentage by weight with the cladding layer of above-mentioned welding rod built-up welding reparation are respectively: Mn0.5～3%, Cr0.5～3%, Si0.5～3%, Mo0.1～2%, Ni0.1～2%, C0.1～0.4%, trace rare-earth and Ti or in above composition, contain micro-B or/and trace V, all the other are the impurity of iron and total amount＜0.5%.
The present invention has the following advantages:
1, 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 bainite structure, thereby can not only mate fully, but also filled up the present blank that does not have welding rod special for special for the repair welding and the reparation of bainite rail and bainite assembled frog with the tissue morphology that is welded object.
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 improve the toughness and the compactness of repair welding, repair layer.
3, because welding rod provided by the invention has been selected marble-fluorite slag system for use, make whole coating be alkaline low-hydrogen, the basicity of coating is 2.0～4.0, in addition coating and core wire weight ratio be 0.4～1.0, thereby improve alloying element by the transfer coefficient of coating to cladding layer, increase the crack resistance of welding cladding layer.
4, contain crome metal, molybdenum, rare earth and vanadium titanium owing 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, guarantee repair welding, good hardness, toughness and the wearability of repair layer.
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 significant prolongation rail and assembled frog repair welding, the service life after repairing.
6, with welding rod provided by the invention to railway track, the assembled frog of fatigue wear carry out Welding Repair, not preheating before not only can realizing welding, not heat treatment of postwelding, simplify welding procedure, reduce the excellent weldability of welding cost, and arc stability is good during welding, 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, is applicable to the repair welding and the reparation of traditional U71Mn rail simultaneously yet, and can overcome need preheating when having the welding rod soldering, the shortcoming that postwelding also need be handled.
Four, the specific embodiment
Provide embodiment below and the present invention is further described.But given embodiment can not be interpreted as limiting the scope of the 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.
In addition, what deserves to be explained is that 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, and 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 37%, fluorite 15%, quartz 10%, titanium dioxide 4%, rare earth ferrosilicon 5%, ferrotianium 5%, ferromanganese 10%, ferrosilicon 4%, ferrochrome 4%, molybdenum-iron 2%, metallic nickel 2%, ferro-boron 2%, the sodium silicate binder that adds in coating 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 H08Mn2SiA welding wire, and the proportioning of each component of coating is: marble 40%, fluorite 17%, quartz 8%, titanium dioxide 6%, rare earth ferrosilicon 5%, ferrotianium 5.7%, ferromanganese 8%, ferrosilicon 3%, ferrochrome 3%, molybdenum-iron 2%, metallic nickel 2%, vanadium iron 0.3%, the sodium silicate binder that adds in coating 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%, quartz 5%, titanium dioxide 8%, rare earth ferrosilicon 8%, ferrotianium 3.8%, ferromanganese 6%, ferrosilicon 5%, ferrochrome 4%, molybdenum-iron 3%, metallic nickel 2%, ferro-boron 1%, vanadium iron 0.2%, the sodium silicate binder that adds in coating 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 35%, fluorite 15%, quartz 10%, titanium dioxide 8%, rare earth ferrosilicon 10%, ferrotianium 3.9%, ferromanganese 5%, ferrosilicon 4%, ferrochrome 4%, molybdenum-iron 3%, metallic nickel 1%, vanadium iron 0.1%, the sodium silicate binder that adds in coating 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 12%, quartzy 10%, titanium dioxide 3%, rare earth ferrosilicon 5%, ferrotianium 5%, ferromanganese 5.5%, ferrosilicon 4.5%, ferrochrome 3%, molybdenum-iron 3%, metallic nickel 1%, the sodium silicate binder that adds in coating are that benchmark counts 30% with the coating dry powder formulation.The welding rod baking process: 30～350 ℃, 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 14%, quartz 10%, titanium dioxide 4%, rare earth ferrosilicon 5%, ferrotianium 5%, ferromanganese 5.5%, ferrosilicon 4.2%, ferrochrome 3%, molybdenum-iron 2%, metallic nickel 1%, vanadium iron 0.3%, the sodium silicate binder that adds in coating are that benchmark counts 25% with the coating dry powder formulation.The welding rod baking process: 300～350 ℃, 2～3 hours.
Embodiment 7
The present embodiment core wire is the H08Mn2SiA welding wire, and the proportioning of each component of coating is: marble 30%, fluorite 10%, quartz 13%, titanium dioxide 3%, rare earth ferrosilicon 3%, ferrotianium 18%, ferromanganese 6%, ferrosilicon 2%, ferrochrome 7%, molybdenum-iron 4%, metallic nickel 1%, ferro-boron 3%, the sodium silicate binder that adds in coating are that benchmark counts 18% with the coating dry powder formulation.The welding rod baking process: 300～350 ℃, 2～3 hours.
Embodiment 8
The present embodiment core wire is the H08MnA welding wire, and the proportioning of each component of coating is: marble 30%, fluorite 10%, quartz 18%, titanium dioxide 2%, rare earth ferrosilicon 6%, ferrotianium 6%, ferromanganese 18%, ferrosilicon 2%, ferrochrome 3%, molybdenum-iron 0.5%, metallic nickel 4%, ferro-boron 0.5%, the sodium silicate binder that adds in coating are that benchmark counts 15% with the coating dry powder formulation.The welding rod baking process: 300～350 ℃, 2-3 hour.
Welding rod provided by the invention is used to weld the joint welding of combined frog crossing point rail, and the performance indications that adopt GB/T229-1994 and GB228-87 standard to record its center see Table 1:
Table 1
After welding rod provided by the invention was used for the repair welding of U71Mn rail, the performance indications that record the hardness of its repair layer saw Table 2:
Table 2
Show that from table 1,2 shown results welding rod provided by the invention is at on-the-spot soldering combined frog crossing point rail of railway and rail, its welding procedure 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. railway track and assembled frog bainite welding rod dedicated for repairing, this welding rod is made up of core wire and coating, core wire is H08A or H08Mn or H08MnA or H08Mn2SiA or H08Mn2MoA welding wire, contain in the compositions of surfacing metal: marble 30～50%, fluorite 10～20%, quartzy 8～20%, titanium dioxide 1-10%, rare earth ferrosilicon 2～10%, ferrotianium 3～20%, ferromanganese 5～20%, ferrosilicon 1～5%, ferrochrome 1～8%, molybdenum-iron 0.1～5%, metallic nickel 0.1～5% and be the sodium silicate binder of benchmark 10～30% in coating dry powder formulation gross weight, the percentage of each component of coating is percetage by weight.
2. railway track according to claim 1 and assembled frog bainite welding rod dedicated for repairing is characterized in that also containing in the coating ferro-boron 0～3%, and vanadium iron 0-0.3%, its percentage are percetage by weight.
3. railway track according to claim 1 and 2 and assembled frog bainite welding rod dedicated for repairing, it is characterized in that being respectively with the composition and the percentage by weight of the cladding layer of above-mentioned welding rod built-up welding reparation: Mn 0.5～3%, Cr0.5～3%, Si 0.5～3%, Mo 0.1～2%, and Ni 0.1～2%, and C 0.1～0.4%, trace rare-earth and Ti or contain micro-B or/and trace V in above composition, all the other are the impurity of iron and total amount＜0.5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100206940A CN100386174C (en) | 2006-04-12 | 2006-04-12 | Bainite welding rod dedicated for repairing rail and assembled frog |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100206940A CN100386174C (en) | 2006-04-12 | 2006-04-12 | Bainite welding rod dedicated for repairing rail and assembled frog |
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| CN1827288A CN1827288A (en) | 2006-09-06 |
| CN100386174C true CN100386174C (en) | 2008-05-07 |
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| CN1827288A (en) | 2006-09-06 |
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