CN108504923A - Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method - Google Patents
Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method Download PDFInfo
- Publication number
- CN108504923A CN108504923A CN201810230290.7A CN201810230290A CN108504923A CN 108504923 A CN108504923 A CN 108504923A CN 201810230290 A CN201810230290 A CN 201810230290A CN 108504923 A CN108504923 A CN 108504923A
- Authority
- CN
- China
- Prior art keywords
- rail
- scale
- hundred meters
- burning optimization
- temperature
- Prior art date
- 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.)
- Pending
Links
Classifications
-
- 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
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/04—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rails
-
- 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
- C22C38/04—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
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B5/00—Rails; Guard rails; Distance-keeping means for them
- E01B5/02—Rails
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Civil Engineering (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of hundred meters of scale 75kg/m burning optimization on line rail, the rail scale size is 100m；Wherein, the rail includes the component of following weight percent：C 0.76~0.80%；Si 0.50~0.58%；Mn1.00~1.05%；V≤0.04~0.10%；P≤0.020%；S≤0.025%.The invention also discloses the production methods of hundred meters of scale 75kg/m burning optimization on line rail.The production method of hundred meters of scale 75kg/m burning optimization on line rail of the present invention, improves Rail Production efficiency, reduces energy consumption production cost；Hundred meters of obtained scale 75kg/m burning optimization on line steel rail straightness are good, and residual stress is small, and quality is high, reduces the welding point on rail, extends service life, increases rail transport safety, are conducive to the needs for meeting railway speed increase development.
Description
Technical field
The present invention relates to metallurgical material technical field, more particularly to a kind of hundred meters of scale 75kg/m burning optimization on line rail and
Its production method.
Background technology
With the continuous rapid development of society, using more and more, the construction of track increasingly accelerates rail transport, exists at present
The rail used in orbit construction is 75kg/m rail, is 25m scales, needs to be welded into 100m long steel to rail welding plant before upper track
Rail, then carry out laying use after being welded into 500m gapless lines.The track of laying influences to reduce rail there are more welding point
Quality and service life.Also, now with Heavy-Haul Railway, the development of speed-raising, the burden of rail increasingly aggravates, especially small
On radius curve, the abrasion of rail are very serious, therefore, higher proposed to the deformation of rail, glacing flatness, connector etc. quality
Requirement.In addition, there are low output, Energy Consumption Cost height, rail matter for the production technology of current 25m scale 75kg/m rail
Measure many defects such as bad.Therefore, to Optimal Development novel steel rail, raising rail quality and the production technology side for optimizing rail
There is an urgent need for method.
Therefore, those skilled in the art is dedicated to a kind of hundred meters of scale 75kg/m burning optimization on line rail of exploitation and its life
Production method.
Invention content
In view of the drawbacks described above of the prior art, the technical problem to be solved by the present invention is to 25m scales in the prior art
75kg/m rail is using being laid in the presence of compared with polylinker, and the quality and service life of track are bad, Rail Production method low output, energy
Source consuming cost is high.
To achieve the above object, first aspect present invention provides a kind of hundred meters of scale 75kg/m burning optimization on line rail,
Its scale size is 100m；Wherein, the rail includes the component of following weight percent：C 0.76~0.80%；Si 0.50
~0.58%；Mn 1.00~1.05%；V≤0.04~0.10%；P≤0.020%；S≤0.025%.
Further, tensile strength Rm >=1180MPa of the rail, elongation after fracture A >=11%, tread hardness 350
~400HB, the cross-section surface hardness of rail head (HRC) A1, B1, C1, D1, E1 are 36~42；The cross-section surface hardness of rail head (HRC) A4, B5,
C5, D3, E3 are >=34.
Second aspect of the present invention provides the production method of a kind of hundred meters of scale 75kg/m burning optimization on line rail, including will
After hundred meters of scale 75kg/m rail of rolling are air-cooled to 800~760 DEG C, simultaneously temperature is maintained to 590~610 DEG C On-line accelerated cooling
Burning optimization on line is carried out, Temperature fall obtains hundred meters of scale 75kg/m burning optimization on line rail；
Further, the time of the burning optimization on line is 100~120s；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, hundred meters of scales of the rolling
The specific steps of 75kg/m rail include：
Step 1, molten iron pretreatment；
Step 2, converter smelting；
Step 3, the refining of LF stoves；
Step 4, VD vacuum outgas；
Step 5, continuous casting；
Step 6, heating steel billet；
Step 7, roll out steel rail.
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 1, molten iron
The sulfur content of pretreated molten iron is≤0.02%；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 2, converter
When smelting, control tapping C content is >=0.08%, and tapping temperature is >=1630 DEG C；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 3, LF stoves
When refining, control basicity of slag is >=2.0, and temperature of offing normal is 1585~1595 DEG C；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 3, LF stoves
It includes following weight percent composition to refine obtained molten steel：C 0.76~0.80%；Si 0.50~0.58%；Mn 1.00~
1.05%；V≤0.04~0.10%；P≤0.020%；S≤0.025%；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 4, VD is true
When sky degassing, the deep vacuum outgas time is >=15min, and the soft blow time is >=18min after vacuum outgas；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 5, continuous casting
Process uses protective casting, and using low aluminium covering slag, secondary cooling zone uses superweak cold water distribution, whole perseverance pulling rate operation；
Further, the Cross Section of CC Billet size of the continuous casting is 320mm × 415mm, continuous casting billet length 7.6m；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 6, steel billet
When heating, heating strand total time is >=2.5 hours；Preheating section temperature is≤800 DEG C, and it is≤1200 DEG C to heat one section of temperature,
Two sections of temperature of heating are 1100~1300 DEG C, and soaking zone temperature is 1100~1260 DEG C；
Further, the production method of described hundred meters of scale 75kg/m burning optimization on line rail, in the step 7, rolling
When rail, start rolling temperature control is 1080~1150 DEG C, and finishing temperature is 930~950 DEG C.
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail
In, the burning optimization on line time is 110s；
In another better embodiment of the present invention, the producer of described hundred meters of scale 75kg/m burning optimization on line rail
In method, the burning optimization on line time is 100s；
In another better embodiment of the present invention, the producer of described hundred meters of scale 75kg/m burning optimization on line rail
In method, the burning optimization on line time is 120s；
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail,
In the step 1, the sulfur content of the pretreated molten iron of molten iron is 0.011%；
In another better embodiment of the present invention, the producer of described hundred meters of scale 75kg/m burning optimization on line rail
Method, in the step 1, the sulfur content of the pretreated molten iron of molten iron is 0.02%；
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail,
In the step 2, when converter smelting, control tapping C content is 0.1%, and tapping temperature is 1644 DEG C；
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail,
In the step 3, when LF stoves refine, control basicity of slag is >=2.0, and temperature of offing normal is 1588 DEG C；
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail,
In the step 4, when VD vacuum outgas, the deep vacuum outgas time is 15min, and the soft blow time is 18min after vacuum outgas；；
In the better embodiment of the present invention, in the step 5, the permanent pulling rate of casting process is 0.50m/min；
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail,
In the step 6, when heating steel billet, heating strand total time is 20 minutes 3 hours；Preheating section temperature is 723 DEG C, when preheating section
Between be 30 minutes；One section of temperature of heating is 935 DEG C, and heating a period of time is 60 minutes；Heat two sections of 1212 DEG C of temperature, heating two
The section time is 50 minutes；Soaking zone temperature is 1244 DEG C, and the soaking zone time is 60 minutes；
In the better embodiment of the present invention, the production method of described hundred meters of scale 75kg/m burning optimization on line rail,
In the step 7, strand is through Rolling With Universal Mill at rail, and start rolling temperature control is 1120 DEG C, and finishing temperature is 930 DEG C.
Using above scheme, disclosed by the invention hundred meters of scale 75kg/m burning optimization on line rail and its production method, tool
There is following technique effect：
(1) hundred meters of scale 75kg/m burning optimization on line rail of the invention, compared with the rail of existing 25m scales,
It carries out in track laying, reduces the welding point on rail, improve the quality of rail, extend service life, increase
Safety is conducive to the needs for meeting railway speed increase development；
(2) production method of hundred meters of scale 75kg/m burning optimization on line rail of the invention, rail burning optimization on line ratio from
Yield is 3~4 times high when line is heat-treated, and substantially increases Rail Production efficiency, reduces energy consumption production cost；
(3) burning optimization on line Rail Production method using the present invention, entire rail tissue are all under austenite cooling
Come, therefore be not in the coarse-grain softened zone of rail head/web of the rail engaging portion, and the web of the rail, the flange of rail are also suitably strengthened；Immediate quenching
When, while rail head accelerates cooling, to the flange of rail also blowing pressurized air or water cooling, contraction, expansion and transformation stress is made to exist
It is equalized in quenching process, and deformation of rail is limited in hot state using transfer guide roller, quench so rail leaves
Glacing flatness is preferable when fiery equipment, and deflection is smaller when aligning, residual stress is small, and rail quality is high；
In conclusion the production method of hundred meters of scale 75kg/m burning optimization on line rail of the present invention, improves rail life
Efficiency is produced, energy consumption production cost is reduced；Hundred meters of obtained scale 75kg/m burning optimization on line steel rail straightness are good, remaining
Stress is small, and quality is high, reduces the welding point on rail, extends service life, increases rail transport safety, favorably
In the needs for meeting railway speed increase development.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
Fig. 1 is the cross-section surface hardness of rail head of rail (HRC) test point schematic diagram in embodiment of the present invention；
Wherein, A1, B1, C1, D1, E1, A4, B5, C5, D3, E3 are test point.
Specific implementation mode
The preferred embodiment of the present invention is introduced below with reference to Figure of description, keeps its technology contents more clear and convenient for reason
Solution.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention is not limited only to text
In the embodiment mentioned.
Hundred meters of embodiment, 75kg/m burning optimization on line Rail Production methods, include the following steps：
1) molten iron pre-processes：Sulfur content 0.011% in molten iron；
2) converter smelting：Control tapping C content 0.1%, 1644 DEG C of tapping temperature, after tapping be added lime, Si-Ca-Ba and
Fluorite modifies clinker, ensures Argon effect in tapping process, slag is pushed up when liquid steel refining is in place, knot has been avoided to stick together phenomenon；
3) LF stoves refine：Basicity of slag >=2.0,1588 DEG C of temperature of offing normal are controlled when LF refining；
4) VD vacuum outgas：Deep vacuum outgas time 15min, soft blow 18min after vacuum outgas, soft blow process argon flow amount
Stablize, molten steel wriggling has no exposed；
5) continuous casting：Casting process uses protective casting, and using low aluminium covering slag, secondary cooling zone uses weak cold water distribution, whole permanent
Pulling rate operates, pulling rate 0.50m/min, opens casting machine electromagnetic agitation and slighter compress, obtain Cross Section of CC Billet size be 320mm ×
415mm, continuous casting billet length 7.6m；
6) heating steel billet：20 points of 3 hours total times are heated, each section of heating time and heating temperature are shown in Table 1；
1 320mm of table × 415mm section heating steel billet parameters
| Preheating section | 1 section of heating | 2 sections of heating | Soaking zone | |
| Heating time | 30min | 60min | 50min | 60min |
| Temperature | 723℃ | 935℃ | 1212℃ | 1244℃ |
7) it rolls：Strand is through Rolling With Universal Mill at rail, start rolling temperature：1120 DEG C, 930 DEG C of finishing temperature；
8) burning optimization on line：Rail is air-cooled to 780 DEG C and enters heat-treatment lines, makes rail in Re Chu using water spray cooling mode
Lineation is quickly cooled to 600 DEG C, and then reducing water mist intensity makes to return the mutually equilibrium of mild intensity of cooling, rail temperature dimension inside rail
It holds and goes out heat-treatment lines, burning optimization on line total time 110s in 600 DEG C of certain times, rail goes out after heat-treatment lines natural air cooling to room
Temperature obtains hundred meters of burning optimization on line rail of 75kg/m.
Through examining, obtained rail chemical composition percentage is as follows：C：0.79%；Si：0.55%；Mn：1.02%；P：
0.016%；S：0.008%；V：0.09%；Remaining is Fe and inevitable impurity；
Through examining, obtained heat-treated rail mechanical property is as follows：Tensile strength 1231MPa, elongation after fracture 12.5%,
Tread hardness 358HB, the cross-section surface hardness of rail head (HRC) are A1：41.3 B1：39.5 C1：39.7 D1：40.3 E1：40.1；
A4：36.9 B5：35.7 C5：35.3 D3：37.2 E3：37.6.
Remaining meets the requirement of TB/T2344-2012 standards.
Other technologies scheme of the present invention also has similar using effect.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be in the protection domain being defined in the patent claims.
Claims (10)
1. a kind of hundred meters of scale 75kg/m burning optimization on line rail, which is characterized in that the rail scale size is 100m；Its
In, the rail includes the component of following weight percent：C 0.76~0.80%；Si 0.50~0.58%；Mn 1.00~
1.05%；V≤0.04~0.10%；P≤0.020%；S≤0.025%.
2. rail as described in claim 1, which is characterized in that tensile strength Rm >=1180MPa of the rail, elongation after fracture
A >=11%, tread 350~400HB of hardness, rail head cross-section surface hardness A1, B1, C1, D1, E1 are 36~42；Rail head cross section is hard
A4, B5, C5 are spent, D3, E3 are >=34.
3. the production method of a kind of hundred meters of scale 75kg/m burning optimization on line rail, which is characterized in that including will roll hundred meters
After scale 75kg/m rail is air-cooled to 800~760 DEG C, simultaneously temperature maintains to carry out online heat to 590~610 DEG C On-line accelerated cooling
Processing, Temperature fall obtain hundred meters of scale 75kg/m burning optimization on line rail；Wherein, the time of burning optimization on line be 100~
120s。
4. method as claimed in claim 3, which is characterized in that the specific steps packet of hundred meters of scale 75kg/m rail of the rolling
It includes：
Step 1, molten iron pretreatment；
Step 2, converter smelting；
Step 3, the refining of LF stoves；
Step 4, VD vacuum outgas；
Step 5, continuous casting；
Step 6, heating steel billet；
Step 7, roll out steel rail.
5. method as claimed in claim 4, which is characterized in that
In the step 1, the sulfur content of the pretreated molten iron of molten iron is≤0.02%；
In the step 2, when converter smelting, control tapping C content is >=0.08%, and tapping temperature is >=1630 DEG C.
6. method as claimed in claim 4, which is characterized in that in the step 3, LF stoves refine when, control basicity of slag be >=
2.0, temperature of offing normal is 1585~1595 DEG C；
The molten steel that LF stoves refine includes following weight percent composition：C 0.76~0.80%；Si 0.50~0.58%；
Mn 1.00~1.05%；V≤0.04~0.10%；P≤0.020%；S≤0.025%；
In the step 4, when VD vacuum outgas, the deep vacuum outgas time is >=15min, after vacuum outgas the soft blow time be >=
18min。
7. method as claimed in claim 4, which is characterized in that in the step 5, casting process uses protective casting, use low
Aluminium covering slag, secondary cooling zone use superweak cold water distribution, whole perseverance pulling rate operation；
The Cross Section of CC Billet size of the continuous casting is 320mm × 415mm, continuous casting billet length 7.6m.
8. method as claimed in claim 4, which is characterized in that in the step 6, when heating steel billet, heating strand total time is
>=2.5 hours；Preheating section temperature is≤800 DEG C, and it is≤1200 DEG C to heat one section of temperature, and it is 1100~1300 to heat two sections of temperature
DEG C, soaking zone temperature is 1100~1260 DEG C.
9. method as claimed in claim 4, which is characterized in that in the step 7, when roll out steel rail, start rolling temperature control is
1080~1150 DEG C, finishing temperature is 930~950 DEG C.
10. hundred meters of scale 75kg/m burning optimization on line rail that a kind of any one of claim 3~9 the method produces,
It is characterized in that, the rail scale size is 100m；Wherein, the rail includes the component of following weight percent：C
0.76~0.80%；Si 0.50~0.58%；Mn 1.00~1.05%；V≤0.04~0.10%；P≤0.020%；S≤
0.025%；Tensile strength Rm >=1180MPa of the rail, elongation after fracture A >=11%, tread 350~400HB of hardness, rail
Cross-section surface hardness A1, B1, C1, D1, E1 are 36~42；Rail head cross-section surface hardness A4, B5, C5, D3, E3 are >=34.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810230290.7A CN108504923A (en) | 2018-03-20 | 2018-03-20 | Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810230290.7A CN108504923A (en) | 2018-03-20 | 2018-03-20 | Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108504923A true CN108504923A (en) | 2018-09-07 |
Family
ID=63377098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810230290.7A Pending CN108504923A (en) | 2018-03-20 | 2018-03-20 | Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108504923A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852890A (en) * | 2019-04-09 | 2019-06-07 | 鞍钢股份有限公司 | A method of improving oil transportation pipeline L450M steel plate low-temperature flexibility |
| CN110468632A (en) * | 2019-08-30 | 2019-11-19 | 武汉钢铁有限公司 | It is a kind of for straight line-curve transition rail and its production method |
| CN110951944A (en) * | 2019-11-27 | 2020-04-03 | 包头钢铁（集团）有限责任公司 | High-strength and high-hardness rare earth steel rail material subjected to online heat treatment and production method thereof |
| CN110951943A (en) * | 2019-11-08 | 2020-04-03 | 包头钢铁（集团）有限责任公司 | Baimamu multiphase steel rail and heat treatment method thereof |
| CN111485171A (en) * | 2020-04-03 | 2020-08-04 | 包头钢铁（集团）有限责任公司 | Steel rail material for heavy haul railway and production method thereof |
| CN111607738A (en) * | 2020-06-30 | 2020-09-01 | 武汉钢铁有限公司 | Corrosion-resistant high-strength pearlitic steel rail and preparation method thereof |
| CN111691242A (en) * | 2020-05-15 | 2020-09-22 | 包头钢铁（集团）有限责任公司 | Novel head profile steel rail and production method thereof |
| WO2021057094A1 (en) * | 2019-09-27 | 2021-04-01 | 武汉钢铁有限公司 | Production method that reduces residual stress of heat-treated steel rail and resulting steel rail |
| CN114774663A (en) * | 2022-04-27 | 2022-07-22 | 包头钢铁（集团）有限责任公司 | Production method of Baimi fixed-length 75kg/m bainite steel rail for heavy haul railway through online heat treatment |
| CN115369305A (en) * | 2022-08-23 | 2022-11-22 | 包头钢铁（集团）有限责任公司 | Smelting method of easily-welded high-speed steel rail |
| CN115433866A (en) * | 2022-08-23 | 2022-12-06 | 包头钢铁（集团）有限责任公司 | Smelting method of low-cost high-quality high-speed rail steel |
| CN115466834A (en) * | 2022-08-26 | 2022-12-13 | 包头钢铁（集团）有限责任公司 | Heat treatment method for producing U71MnH steel rail by adopting water mist cooling medium |
| CN116590609A (en) * | 2023-04-12 | 2023-08-15 | 包头钢铁（集团）有限责任公司 | Low-cost heat-treated steel rail and production method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557557A (en) * | 2017-08-07 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | A kind of burning optimization on line method for being used to eliminate rail abnormal structure |
-
2018
- 2018-03-20 CN CN201810230290.7A patent/CN108504923A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107557557A (en) * | 2017-08-07 | 2018-01-09 | 包头钢铁（集团）有限责任公司 | A kind of burning optimization on line method for being used to eliminate rail abnormal structure |
Non-Patent Citations (2)
| Title |
|---|
| 邓建辉: "攀钢PD3热处理钢轨及展望", 《四川冶金》 * |
| 陈爱梅等: "PD3重轨钢试制", 《包钢科技》 * |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852890A (en) * | 2019-04-09 | 2019-06-07 | 鞍钢股份有限公司 | A method of improving oil transportation pipeline L450M steel plate low-temperature flexibility |
| CN110468632A (en) * | 2019-08-30 | 2019-11-19 | 武汉钢铁有限公司 | It is a kind of for straight line-curve transition rail and its production method |
| WO2021057094A1 (en) * | 2019-09-27 | 2021-04-01 | 武汉钢铁有限公司 | Production method that reduces residual stress of heat-treated steel rail and resulting steel rail |
| CN110951943A (en) * | 2019-11-08 | 2020-04-03 | 包头钢铁（集团）有限责任公司 | Baimamu multiphase steel rail and heat treatment method thereof |
| CN110951943B (en) * | 2019-11-08 | 2021-07-20 | 包头钢铁（集团）有限责任公司 | Baimamu multiphase steel rail and heat treatment method thereof |
| CN110951944A (en) * | 2019-11-27 | 2020-04-03 | 包头钢铁（集团）有限责任公司 | High-strength and high-hardness rare earth steel rail material subjected to online heat treatment and production method thereof |
| CN111485171A (en) * | 2020-04-03 | 2020-08-04 | 包头钢铁（集团）有限责任公司 | Steel rail material for heavy haul railway and production method thereof |
| CN111691242A (en) * | 2020-05-15 | 2020-09-22 | 包头钢铁（集团）有限责任公司 | Novel head profile steel rail and production method thereof |
| CN111607738A (en) * | 2020-06-30 | 2020-09-01 | 武汉钢铁有限公司 | Corrosion-resistant high-strength pearlitic steel rail and preparation method thereof |
| CN111607738B (en) * | 2020-06-30 | 2021-12-17 | 武汉钢铁有限公司 | Corrosion-resistant high-strength pearlitic steel rail and preparation method thereof |
| CN114774663A (en) * | 2022-04-27 | 2022-07-22 | 包头钢铁（集团）有限责任公司 | Production method of Baimi fixed-length 75kg/m bainite steel rail for heavy haul railway through online heat treatment |
| CN115369305A (en) * | 2022-08-23 | 2022-11-22 | 包头钢铁（集团）有限责任公司 | Smelting method of easily-welded high-speed steel rail |
| CN115433866A (en) * | 2022-08-23 | 2022-12-06 | 包头钢铁（集团）有限责任公司 | Smelting method of low-cost high-quality high-speed rail steel |
| CN115433866B (en) * | 2022-08-23 | 2024-02-23 | 包头钢铁（集团）有限责任公司 | Smelting method of low-cost high-quality high-speed rail steel |
| CN115466834A (en) * | 2022-08-26 | 2022-12-13 | 包头钢铁（集团）有限责任公司 | Heat treatment method for producing U71MnH steel rail by adopting water mist cooling medium |
| CN116590609A (en) * | 2023-04-12 | 2023-08-15 | 包头钢铁（集团）有限责任公司 | Low-cost heat-treated steel rail and production method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108504923A (en) | Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method | |
| CN108456824A (en) | Hundred meters of scale 75kg/m hot rolled rails of one kind and its production method | |
| CN108411089A (en) | A kind of production method of European standard R350HT burning optimization on line rail | |
| CN108504838A (en) | A kind of production method of European standard R350LHT burning optimization on line rail | |
| CN103045935B (en) | Control method for surface decarburization and ferrite distribution of steel disc bar of spring | |
| CN102899460B (en) | Heat treatment method for martensitic stainless steel forging module | |
| CN108374120A (en) | A kind of European standard R320Cr rail and its production method | |
| CN104651724A (en) | Coil rod for pre-stressed steel strand and production method of coil rod | |
| CN101892443A (en) | High strength and high toughness petroleum casing pipe at steel grade with yield strength of 170-180ksi and manufacturing method thereof | |
| CN105002445B (en) | It is a kind of to be used to manufacture 4130X seamless steel pipes of on-board high-voltage gas cylinder and preparation method thereof | |
| CN103276310A (en) | Rare-earth-containing H-shaped steel with low-temperature toughness and production method thereof | |
| CN103602905A (en) | Rare earth containing, high-strength and high-toughness seamless steel pipe for L555Q pipeline and production method thereof | |
| CN101905244B (en) | Method for producing mandrel by utilizing 28NiCrMoV steel as raw material | |
| CN103469078A (en) | Rolled steel wire used on 70 kg-grade round-link chain and preparation method of rolled steel wire | |
| CN104946993B (en) | A kind of quenched and tempered state hic resistance, SSC Wide and Thick Slabs and preparation method thereof | |
| CN109112246B (en) | Production method of steel wire rod for railway elastic strip fastener formed by direct cold bending | |
| CN105970082A (en) | Production method of steel wire rod used for high-strength prestressed concrete steel bars | |
| CN103331308B (en) | Energy-saving carbon manganese steel rolling method based on critical temperature | |
| CN114774663A (en) | Production method of Baimi fixed-length 75kg/m bainite steel rail for heavy haul railway through online heat treatment | |
| CN104789878B (en) | A kind of high-hardenability oil casing collar material seamless steel pipe and preparation method | |
| CN103397156A (en) | Wire manufacturing method | |
| CN103320699B (en) | A kind of containing rare earth moisture-proof H 2the seamless steel pipe for gas cylinder of S corrosion and production method thereof | |
| CN103361558B (en) | A kind of containing rare earth moisture-proof H 2the T95 steel grade oil well casing of S corrosion and production method thereof | |
| CN104651723A (en) | Rare earth contained oil casing with high hydrogen sulfide corrosion resistance and collapse resistance, and production method of oil casing | |
| CN104313474A (en) | Seamless steel tube for rare earth containing low-cost H2S corrosion-resistant L320NS pipeline and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180907 |
|
| RJ01 | Rejection of invention patent application after publication |