CN108048746A - A kind of high-intensity switch rail and preparation method thereof - Google Patents
A kind of high-intensity switch rail and preparation method thereof Download PDFInfo
- Publication number
- CN108048746A CN108048746A CN201711435363.8A CN201711435363A CN108048746A CN 108048746 A CN108048746 A CN 108048746A CN 201711435363 A CN201711435363 A CN 201711435363A CN 108048746 A CN108048746 A CN 108048746A
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- CN
- China
- Prior art keywords
- smelting furnace
- railroad turnout
- intensity switch
- steel rail
- rail
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- 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.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/085—Rail sections
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a kind of high-intensity switch rail and preparation method thereof, are related to railroad turnout steel rail technical field, and the railroad turnout steel rail chemical content and mass percent are as follows：C:0.10-0.40%, Si:0.30-0.90%, Mn：1.10-4.20%, S:0.10-0.32%, molybdenum:0.21-0.42%, Ni:0.25-0.39%, Cr:0.16-0.47%, Re:1.10-1.37%, Mo:0.27-0.39%, W:0.14-0.25%, surplus are iron and inevitable impurity.
Description
Technical field
The present invention relates to railroad turnout steel rail technical field, more particularly to a kind of high-intensity switch rail and preparation method thereof.
Background technology
Track switch is one of weak link of line facility.As the increase year by year by track switch gross weight and speed is with carrying
Height, impact, abrasion getting worse when train passes through track switch between wheel track, when particularly train is laterally through changing points part,
What point rolled run over and injure and lateral abrasion problems are especially prominent.The AT tongues of railroad turnout steel rail processing are one of important components of railway frog.It
Guide current of traffic, bear motion wheel impact and wear hardness quality be directly related to railway operation safety and
Efficiency.
The content of the invention
The technical problems to be solved by the invention are how to ensure impact resistance and the abrasion resistance of railroad turnout steel rail, are overcome existing
There is the shortcomings that technology, a kind of high-intensity switch rail and preparation method thereof is provided.
In order to solve the above technical problems, the present invention provides a kind of high-intensity switch rail, the railroad turnout steel rail chemical content
And mass percent is as follows：C:0.10-0.40%, Si:0.30-0.90%, Mn：1.10-4.20%, S:0.10-
0.32%, molybdenum:0.21-0.42%, Ni:0.25-0.39%, Cr:0.16-0.47%, Re:1.10-1.37%, Mo:
0.27-0.39%, W:0.14-0.25%, surplus are iron and inevitable impurity.
Technique effect：For the present invention using C, Si, Mn alloy system as base material, the intensity of this base material is higher, can bear certain
Impact, the W and C that add in the present invention can form WC on base material, and the formation of WC, can improve the hardness of base material
And wear-resisting property, the Ni that the present invention adds in addition can wrap up WC, so as to form WC particle, Ni can further improve the resistance to of WC
Polishing machine makes WC be not easy to be lost faster, improves the service life of WC, is being smelted between Cr, C and W that the present invention adds
It is that can form a variety of hard phases, such as W3C, Cr7C3, Cr23C6, Cr3C2, these hard phases can significantly improve the hardness of base material
And wearability, and the W and C that the present invention matches, the WC amounts formed are moderate, and the amount that will not cause WC is excessive, and causes base material crisp
Property it is larger, base material is enable to bear certain impact resistance, railroad turnout steel rail prepared by the present invention, hardness number can reach
901.49HV, wear-resistant and shock resistance are good.
The technical solution that further limits of the present invention is：
Further, the railroad turnout steel rail chemical content and mass percent are as follows：C:0.25%, Si:0.60%, Mn：
2.6%, S:0.21%, molybdenum:0.31%, Ni:0.32%, B:0.3%, Re:1.23%, Mo:0.33%, W:0.19%, surplus
For iron and inevitable impurity..
A kind of preceding high-intensity switch rail, wherein, the Ni contents are 0.32-0.36%.
A kind of preceding high-intensity switch rail, the Mn contents are that 3.1%, S contents are 0.21%.
A kind of preparation method of high-intensity switch rail, it is characterised in that：Comprise the following steps：
Step 1：C, Si, molybdenum, Ni, B, Re, Mo, W and iron are added in smelting furnace by proportioning and smelted, by temperature of smelting furnace liter
To 850 DEG C, 0.5h is kept, is cooled to 150 DEG C, keeps 5min；By proportioning by Mn, S, addition smelting furnace, temperature of smelting furnace rises to 910
DEG C, keep 0.5h, temperature of smelting furnace rises to 940 DEG C, keeps 1.5h, then temperature of smelting furnace is reduced to successively 200 DEG C, 250 DEG C,
300 DEG C, and 10min is kept respectively；
Step 2：Steel rolling is carried out on Φ 900mm two-roller reversible formula Hot Rolling Mills, railroad turnout steel rail is made；
Step 3：By railroad turnout steel rail using stacking slow cooling, cooling rate control is in 0.71 DEG C/below s, natural cooling in air thereafter；
The beneficial effects of the invention are as follows：
（1）As the Cr of addition can reduce pearlite piece interlamellar spacing in the present invention, hardness raises, and improves the hardness of base material, and
The Cr contents that the present invention adds are less than 0.47%, it will not be made to influence to austenite cooling transformation, the molybdenum of addition can also make height
Carbon steel pearlite piece interlamellar spacing is significantly refined, and hardness significantly improves, in addition, it also has lubricant effect, slows down external substance
Abrasion to rail, while can also improve the impact flexibility of material；
（2）The Mn and S added in the present invention can form MnS when smelting, and MnS can start when temperature is increased to 810 DEG C
Diffusion, MnS spread the gap location for being mixed in base material, make base material strand center porosity≤1.0 grade, center segregation≤1.0 grade, center
Shrinkage cavity≤1.0 grade, centre burst≤0.5 grade, it is ensured that form the hardness number of rail, improve its shock resistance.
Specific embodiment
The present embodiment provides a kind of high-intensity switch rail, the railroad turnout steel rail chemical content and mass percent are as follows：C:
0.10-0.40%, Si:0.30-0.90%, Mn：1.10-4.20%, S:0.10-0.32%, molybdenum:0.21-
0.42%, Ni:0.25-0.39%, Cr:0.16-0.47%, Re:1.10-1.37%, Mo:0.27-0.39%, W:
0.14-0.25%, surplus are iron and inevitable impurity.
The railroad turnout steel rail chemical content and mass percent of the present embodiment are using as follows：C:0.25%, Si:0.60%,
Mn：2.6%, S:0.21%, molybdenum:0.31%, Ni:0.32%, Cr:0.3%, Re:1.23%, Mo:0.33%, W:
0.19%, surplus is iron and inevitable impurity.
Wherein, Ni contents are 0.32-0.36%, and Mn contents are that 3.1%, S contents are 0.21%.
A kind of preparation method of high-intensity switch rail, it is characterised in that：Comprise the following steps：
Step 1：C, Si, molybdenum, Ni, Cr, Re, Mo, W and iron are added in smelting furnace by proportioning and smelted, by temperature of smelting furnace
850 DEG C are risen to, keeps 0.5h, is cooled to 150 DEG C, keeps 5min；By proportioning by Mn, S, addition smelting furnace, temperature of smelting furnace rises to 910
DEG C, keep 0.5h, temperature of smelting furnace rises to 940 DEG C, keeps 1.5h, then temperature of smelting furnace is reduced to successively 200 DEG C, 250 DEG C,
300 DEG C, and 10min is kept respectively；
Step 2：Steel rolling is carried out on Φ 900mm two-roller reversible formula Hot Rolling Mills, railroad turnout steel rail is made；
Step 3：By railroad turnout steel rail using stacking slow cooling, cooling rate control is in 0.71 DEG C/below s, natural cooling in air thereafter.
The railroad turnout steel rail prepared using the present invention is compared with common railroad turnout steel rail, using identical grinding apparatus to this hair
The railroad turnout steel rail of bright preparation and common railroad turnout steel rail carry out the polishing of identical dynamics, same area, and polish 45min, observes result
As follows, without polishing scratch, there is polishing scratch in common railroad turnout steel rail surface on railroad turnout steel rail surface prepared by the present invention；Using steel nail to the present invention
The railroad turnout steel rail of preparation and common railroad turnout steel rail carry out identical dynamics, same area is impacted, track switch steel prepared by the present invention
Track surface occurs damaged without trace, common railroad turnout steel rail surface；It can be obtained by testing above, railroad turnout steel rail antifriction prepared by the present invention
It wipes performance and impact resistance is stronger.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical solution, all fall within the present invention claims protection domain.
Claims (5)
1. a kind of high-intensity switch rail, it is characterised in that：The railroad turnout steel rail chemical content and mass percent are as follows：C:
0.10-0.40%, Si:0.30-0.90%, Mn：1.10-4.20%, S:0.10-0.32%, molybdenum:0.21-
0.42%, Ni:0.25-0.39%, Cr:0.16-0.47%, Re:1.10-1.37%, Mo:0.27-0.39%, W:
0.14-0.25%, surplus are iron and inevitable impurity.
2. a kind of high-intensity switch rail according to claim 1, it is characterised in that：The railroad turnout steel rail chemical content and
Mass percent is as follows：C:0.25%, Si:0.60%, Mn：2.6%, S:0.21%, molybdenum:0.31%, Ni:0.32%,
Cr:0.3%, Re:1.23%, Mo:0.33%, W:0.19%, surplus is iron and inevitable impurity.
3. a kind of high-intensity switch rail according to claim 1, it is characterised in that：Wherein, the Ni contents are
0.32-0.36%.
4. a kind of high-intensity switch rail according to claim 1, it is characterised in that：The Mn contents contain for 3.1%, S
It measures as 0.21%.
5. a kind of preparation method of high-intensity switch rail as described in claim 1, it is characterised in that：Comprise the following steps：
Step 1：C, Si, molybdenum, Ni, Cr, Re, Mo, W and iron are added in smelting furnace by proportioning and smelted, by temperature of smelting furnace
850 DEG C are risen to, keeps 0.5h, is cooled to 150 DEG C, keeps 5min；By proportioning by Mn, S, addition smelting furnace, temperature of smelting furnace rises to 910
DEG C, keep 0.5h, temperature of smelting furnace rises to 940 DEG C, keeps 1.5h, then temperature of smelting furnace is reduced to successively 200 DEG C, 250 DEG C,
300 DEG C, and 10min is kept respectively；
Step 2：Steel rolling is carried out on Φ 900mm two-roller reversible formula Hot Rolling Mills, railroad turnout steel rail is made；
Step 3：By railroad turnout steel rail using stacking slow cooling, cooling rate control is in 0.71 DEG C/below s, natural cooling in air thereafter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435363.8A CN108048746A (en) | 2017-12-26 | 2017-12-26 | A kind of high-intensity switch rail and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711435363.8A CN108048746A (en) | 2017-12-26 | 2017-12-26 | A kind of high-intensity switch rail and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108048746A true CN108048746A (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711435363.8A Pending CN108048746A (en) | 2017-12-26 | 2017-12-26 | A kind of high-intensity switch rail and preparation method thereof |
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| Country | Link |
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| CN (1) | CN108048746A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743334A (en) * | 2007-10-10 | 2010-06-16 | 杰富意钢铁株式会社 | Internal high hardness type pearlitic rail with excellent wear resistance, rolling contact fatigue resistance, and delayed fracture property and method for producing same |
| CN102021492A (en) * | 2009-09-15 | 2011-04-20 | 鞍钢股份有限公司 | Low-carbon low-alloy wear-resistant steel and production method thereof |
| CN102534387A (en) * | 2011-12-12 | 2012-07-04 | 中国铁道科学研究院金属及化学研究所 | Bainite/martensite steel rail with 1,500 Mpa level of high toughness and manufacturing method thereof |
-
2017
- 2017-12-26 CN CN201711435363.8A patent/CN108048746A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101743334A (en) * | 2007-10-10 | 2010-06-16 | 杰富意钢铁株式会社 | Internal high hardness type pearlitic rail with excellent wear resistance, rolling contact fatigue resistance, and delayed fracture property and method for producing same |
| CN102021492A (en) * | 2009-09-15 | 2011-04-20 | 鞍钢股份有限公司 | Low-carbon low-alloy wear-resistant steel and production method thereof |
| CN102534387A (en) * | 2011-12-12 | 2012-07-04 | 中国铁道科学研究院金属及化学研究所 | Bainite/martensite steel rail with 1,500 Mpa level of high toughness and manufacturing method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |
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| RJ01 | Rejection of invention patent application after publication |