CN1233899C - Fixed railroad frog center rail made of composite parts - Google Patents
Fixed railroad frog center rail made of composite parts Download PDFInfo
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- CN1233899C CN1233899C CN 03153376 CN03153376A CN1233899C CN 1233899 C CN1233899 C CN 1233899C CN 03153376 CN03153376 CN 03153376 CN 03153376 A CN03153376 A CN 03153376A CN 1233899 C CN1233899 C CN 1233899C
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- rail
- steel
- frog
- heart rail
- center rail
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Abstract
The present invention relates to a manufacturing technology for a railroad frog, particularly to a fixed frog center rail of a railroad made of composite parts. The frog center rail comprises tip parts, heel parts, flangeways, and part of a wing rail working surface, wherein a center rail reinforced section at least from the tip part to a cross section with the top width of 60MM in at least one tip part is once formed by fusion casting through an electroslag casting method by using wear-resistant steel, and the rest tip parts, the heel parts, the flangeways and the part of the wing rail working surface are once formed by railway steel or other steel through any method of fusion casting, casting or forging. The frog center rail has the mechanical properties of forged pieces and has the advantages that the service life of frogs can be greatly prolonged, the needed shapes and structures are supplied, the integrity and the stability of the combined frogs are good, the combined frogs can be directly welded with steel rails on a rail way, the requirement of super long seamless railways can be satisfied, and the cost is low.
Description
Technical field:
The present invention relates to the manufacturing technology of railroad frog, particularly a kind of fixed railroad frog heart rail made from composite component.
Background technology:
The fixed railway frog that generally uses on the railway is the high manganese steel frog with sand mold block cast at present, and is relatively poor aspect the uniformity of density, performance and structure.According to statistics, the inefficacy of most block cast high manganese steel frog heart rails is to be caused by crackle, flake-off piece and wearing and tearing that the wide 60mm section of heart rail tread produces to the position between the 20mm section.As increasing substantially the quality at this position in the mode of sand mold block cast, not only have any problem technically, also can increase considerably cost of production, and because casting flaws such as the shrinkage cavity that is difficult to avoid, shrinkage porosite, pore, crackles, railway frog can't be with other steel block cast so far.
Potassium steel has strength and toughness to cooperate the shortcoming bad, that yield strength is low excessively, the in use easy flow deformation of the work plane of heart rail above-mentioned zone.At the use initial stage, deflection is less, because of strain-hardening gently wears away bigger, and using the later stage, after the plasticity depletion, 0.786b place, rail level below (hobs the power maximum, b is the half-breadth of wheel and heart rail contact surface) micro-crack that forms because of intersection of dislocation can expand rapidly again, produces the flake-off piece.
For satisfying the requirement of overlength gapless track, need railway frog and circuit rail welded together, but solid manganese steel frog can not directly weld because of potassium steel solderability difference with the circuit rail.Though invented the welding method of high manganese steel frog and carbon element rail, as the disclosed a kind of connector connection high manganese steel frog of low-carbon (LC) austenitic steel and the method for carbon element rail used of ZL91104903.7, but the flash welder that this method needs costs an arm and a leg, capital investment is big, and needing welding eight times before and after four connectors (two of its central track heel ends) altogether, cost is higher.
Forging surpasses foundry goods significantly in mechanical properties.Make railway frog with forging method and can use other steel grades, as air-cooled bainitic steels.Be difficult to make complicated shape but forge, though can adopt fabricated structure, only adopt forging at the most advanced and sophisticated position of heart rail, but forge and to purchase corresponding forging equipment, expense is very high, and forging also needs a large amount of machining, and this makes its cost far above foundry goods, and the railway frog that combines also has, and globality is bad, the shortcoming of poor stability.
Summary of the invention:
Purpose of the present invention aims to provide a kind of mechanical performance that forging is arranged, can increase substantially the application life of railway frog, required shape and structure are arranged again, guarantee that the railway frog after the combination has globality and stability preferably, and can be directly and the rail welding on the circuit, satisfy the requirement of overlength gapless track and the not high fixed railroad frog heart rail made from composite component of cost.
The technical scheme that realizes the foregoing invention purpose is: this central body of frog comprises tip portion, heel end part, flangeway, the part wing rail work plane of heart rail, in several parts of described heart rail, at least in tip portion, and the heart rail to top width 60mm section part is strengthened section with abrasion-resistant stee fusion cast process of method by electroslag smelting casting from its ogival at least, all the other tip portions and heel end part, flangeway, part wing rail work plane with railway steel or other steel by founding, cast, forge make in any mode one-shot forming.
Above technical scheme is to realize a kind of most economical technical scheme of the object of the invention, if ignoring the cost of railway frog increases, form in above-mentioned several parts of heart rail, can adopt electroslag smelting casting method fusion cast process as far as possible, that is can also have following technical scheme to realize goal of the invention of the present invention: this flangeway and above-mentioned heart rail are strengthened section one and are reinstated abrasion-resistant stee fusion cast process of method by electroslag smelting casting, all the other tip portions and heel end partly, part wing rail work plane with railway steel or other steel by founding, cast, forge make in any mode one-shot forming.Perhaps, this flangeway and part wing rail work plane and above-mentioned heart rail are strengthened section one and are reinstated abrasion-resistant stee fusion cast process of method by electroslag smelting casting, all the other tip portions and heel end partly with railway steel or other steel by founding, cast, forge make in any mode one-shot forming.
The resistance heat fusing consutrode that electroslag smelting casting utilizes electric current to produce by the slag that conducts electricity, the composition of consutrode is close with the composition of foundry goods.The drop of fusing is gone in the metal steel mould of water-cooled continuous solidification by slag blanket.Because the refining effect of slag, can be with the most of oxide in the steel, almost all sulfide are removed, also in various degree the reduction of other content that impurity arranged.Founding is that metal is finished under the tight protection of slag and metal mold fully from melting the whole process of solidifying the formation foundry goods greatly, and the secondary oxidation of not only having avoided the air contact to take place has also been avoided being polluted by refractory material.A small amount of field trash remaining in the founding is tiny granular even distribution owing to having little time to gather to grow up under the condition of continuous solidification, mechanical performance to foundry goods no longer includes remarkable influence, the segregation and the shrinkage cavity of composition have fundamentally been eliminated, shrinkage porosite, pore, defectives such as crackle, the foundry goods that obtains, the even tissue densification, smooth surface, need not machining, mechanical strength, plasticity is identical with forging, and impact toughness, fatigue resistance, particularly the stability of performance then is higher than forging, thereby electroslag smelting casting can adopt other steel grades to make railway frog, as air-cooled bainitic steels.
Electroslag smelting casting also have equipment investment few, go up detective, advantages of simple operation, this also be adopt additive method produce railway frog can't be comparable.
Description of drawings: Fig. 1 is that heart rail of the present invention is installed and used the structural representation under the state.
The specific embodiment:
Provide specific embodiments of the invention below in conjunction with accompanying drawing.The described central body of frog of this embodiment is made up of tip portion 1, heel end part 2, flangeway 3, part wing rail work plane 4 four parts of heart rail, the reinforcement section that belongs to heart rail in its tip portion 1 from ogival to top width 60mm section part, this strengthens section and flangeway 3 and part wing rail work plane 4 simultaneously with abrasion-resistant stee fusion cast process of method by electroslag smelting casting, and this abrasion-resistant stee can be bainitic steel, shellfish body steel difficult to understand or potassium steel.Exceed this reinforcement section tip portion 1 and by two connect heel end part 2 that rail constitute can with railway steel or other steel by founding, cast, forge make in any mode one-shot forming, the tread of two connection rail and the flange of rail are through also welded together after the machining, the end face of its end face and tip portion 1 is integral by being welded to connect, and also can cast out joint from the end face of tip portion 1 and be connected with heel end part 2 with bolt secondary 5.This reinforcement section is connected with this and is tightened to one between rail, forms whole central body of frog and has stronger globality and stability thereby make by tip portion 1, heel end part 2, flangeway 3, part wing rail work plane 4 four parts.
Claims (4)
1, a kind of fixed railroad frog heart rail made from composite component, the tip portion, heel end part, flangeway, the part wing rail work plane that comprise heart rail, it is characterized in that in several parts of described heart rail, at least in tip portion, and the heart rail to top width 60mm section part is strengthened section with abrasion-resistant stee fusion cast process of method by electroslag smelting casting from its ogival at least, all the other tip portions and heel end part, flangeway, part wing rail work plane with the railway steel by founding, cast, forge make in any mode one-shot forming.
2, the fixed railroad frog heart rail made from composite component according to claim 1, it is characterized in that this flangeway and above-mentioned heart rail strengthen section one and reinstate abrasion-resistant stee fusion cast process of method by electroslag smelting casting, all the other tip portions and heel end partly, part wing rail work plane with the railway steel by founding, cast, forge make in any mode one-shot forming.
3, the fixed railroad frog heart rail made from composite component according to claim 1, it is characterized in that this flangeway and part wing rail work plane and above-mentioned heart rail strengthen section one and reinstate abrasion-resistant stee fusion cast process of method by electroslag smelting casting, all the other tip portions and heel end partly with the railway steel by founding, cast, forge make in any mode one-shot forming.
4,, it is characterized in that this abrasion-resistant stee is a kind of in bainitic steel, shellfish body steel difficult to understand or the potassium steel according to claim 1 or the 2 or 3 described fixed railroad frog heart rails made from composite component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153376 CN1233899C (en) | 2003-08-12 | 2003-08-12 | Fixed railroad frog center rail made of composite parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153376 CN1233899C (en) | 2003-08-12 | 2003-08-12 | Fixed railroad frog center rail made of composite parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580398A CN1580398A (en) | 2005-02-16 |
| CN1233899C true CN1233899C (en) | 2005-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03153376 Expired - Fee Related CN1233899C (en) | 2003-08-12 | 2003-08-12 | Fixed railroad frog center rail made of composite parts |
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| Country | Link |
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| CN (1) | CN1233899C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101245577B (en) * | 2008-03-07 | 2010-06-16 | 中铁宝桥股份有限公司 | Method for improving abrasion resistance of switch tongues point rail terminal |
| CN102877382B (en) * | 2012-10-26 | 2015-02-11 | 大连铁联铁路器材制造有限公司 | Alloy steel reinforced point rail |
| CN103726422A (en) * | 2014-01-21 | 2014-04-16 | 唐山金山腾宇科技有限公司 | Repairing method of waste curved switch rail |
| CN104790269B (en) * | 2015-04-17 | 2016-09-14 | 卢志文 | A kind of tongue |
| CN106400618B (en) * | 2015-07-27 | 2018-11-23 | 浙江德盛铁路器材股份有限公司 | Dual alloy integrated forged frog and its manufacturing method |
| CN105442391B (en) * | 2015-12-10 | 2017-05-31 | 李吉炎 | A kind of railway frog |
| CN110761129B (en) * | 2019-10-31 | 2020-09-29 | 燕山大学 | Forging and casting integrated frog production method |
-
2003
- 2003-08-12 CN CN 03153376 patent/CN1233899C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1580398A (en) | 2005-02-16 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051228 |