CN115029506A - Production method of carbon steel rail with American standard strength - Google Patents
Production method of carbon steel rail with American standard strength Download PDFInfo
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- CN115029506A CN115029506A CN202210706619.9A CN202210706619A CN115029506A CN 115029506 A CN115029506 A CN 115029506A CN 202210706619 A CN202210706619 A CN 202210706619A CN 115029506 A CN115029506 A CN 115029506A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
- B22D11/182—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by measuring temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/16—Controlling or regulating processes or operations
- B22D11/20—Controlling or regulating processes or operations for removing cast stock
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0025—Adding carbon material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
- C22C33/06—Making ferrous alloys by melting using master alloys
-
- 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
-
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a production method of a carbon steel rail with American standard strength, which comprises the following steps: 1) pretreating molten iron; 2) smelting in a converter; 3) refining in an LF furnace; 4) VD vacuum degassing; 5) continuous casting; 6) heating a steel billet: the total heating time is more than 50 minutes, and the heating temperature of each section is as follows: the preheating section is less than or equal to 800 ℃, the heating section 1 is 1150-1280 ℃, the heating section 2 is less than or equal to 1200 ℃, and the soaking section 1150-1260 ℃; 7) rolling temperature: rolling the casting blank into a steel rail by a universal rolling mill, wherein the initial rolling temperature is as follows: 1070-: less than 930 ℃. The invention aims to provide a production method of a carbon steel rail meeting AREMA-2019 standard strength, the tensile strength of the steel rail after hot rolling is more than or equal to 980MPa, the yield strength is more than or equal to 510MPa, the elongation is more than or equal to 10 percent, and the tread hardness of the steel rail is more than or equal to 310 HB.
Description
Technical Field
The invention relates to the field of metallurgical materials, in particular to a production method of a carbon steel rail with American standard strength.
Background
North America is a developed railway region, is in the top of the world in the aspect of heavy-load transportation technology, has a perfect and developed railway network, has completed large-scale lines completely in the past 2000 years, has an AREMA standard which is a relatively influential technical standard in the field of steel rails for international freight heavy-load railways, has a wide foundation internationally, is a preferred standard for heavy-load railway customers to purchase steel rails in America, Australia and the like, and is considered as a threshold for entering high-end markets by steel rail production enterprises. From the market, the operation amount of north american railways and australian mine railways will increase year by year, and the demand for carbon steel rails will also increase more and more. In addition, many countries also raise railways. The procurement of steel rails in these countries is largely based on the AREMA standard and, therefore, has considerable market demand. With the development of economy, the transportation of bulk goods mainly depends on trains, and in recent years, the needs of American standard steel rails are obviously raised on North American heavy-duty railways and Australian mine railways. With the increase of annual operating volumes, the requirements on the performance of the steel rail are more severe, especially with a small curvature radius. Therefore, the carbon steel rail meeting the AREMA-2019 standard strength is developed, the material of the steel-clad outlet steel rail can be increased, the market share can be seized, and the foreign exchange income is created. In addition, in the aspect of market demand, a plurality of heavy haul railways will be established in the future, and the demand for American standard high-strength steel rails will be expanded. Therefore, the developed AREMA standard strength carbon steel rail has a wide export market.
Disclosure of Invention
The invention aims to provide a production method of a carbon steel rail meeting AREMA-2019 standard strength.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a production method of a carbon steel rail with American standard strength, which comprises the following steps:
1) pretreatment of molten iron: the molten iron is subject to desulfurization pretreatment, the requirement that [ P ] is less than or equal to 0.12 percent and [ S ] is less than or equal to 0.0.030 percent, and the rest raw materials meet the requirements of corresponding standards;
2) smelting in a converter: controlling the end point C to be more than or equal to 0.06 percent, controlling the tapping temperature T (DEG C) to be more than 1610, carrying out in-tank deoxidation alloying by adopting silicomanganese, ferromanganese and ferrosilicon alloy, and carrying out converter recarburization by adopting a heavy rail recarburizing agent;
3) refining in an LF furnace: sufficient heating time is needed after the refined slag charge is added, the slag charge is ensured to be completely melted, foam slag is formed as soon as possible, submerged arc operation is realized, the aim of white slag operation is achieved, and the alkalinity of the slag is controlled to be more than or equal to 2.0;
4) VD vacuum degassing: the deep vacuum time is more than or equal to 15min, the vacuum degree is less than 0.1KPa, the soft blowing time is more than or equal to 15min after the vacuum treatment is finished, and molten steel cannot be exposed during the soft blowing period;
5) continuous casting: the liquid level is automatically controlled in the casting process, and electromagnetic stirring is normally used; liquidus temperature of steel grade: 1461 ℃, the superheat degree of the continuous casting molten steel is between 15 ℃ and 25 ℃, the fluctuation range is small and is not more than 30 ℃, and the constant drawing speed is adopted;
6) heating a steel billet: the total heating time is more than 50 minutes, and the heating temperature of each section is as follows: the preheating section is less than or equal to 800 ℃, the heating section 1 is 1150-1280 ℃, the heating section 2 is less than or equal to 1200 ℃, and the soaking section 1150-1260 ℃;
7) rolling temperature: rolling the casting blank into a steel rail by a universal rolling mill, wherein the initial rolling temperature is as follows: 1070-: less than 930 ℃.
Further, the steel rail material comprises the following chemical components in percentage by mass: c: 0.75 to 0.85; si: 0.45 to 0.6; mn: 1.0 to 1.2; p is less than or equal to 0.020; s is less than or equal to 0.020; cr: 0.2 to 0.3, and the balance of Fe and inevitable impurities.
Furthermore, the tensile strength of the hot rolled steel rail is more than or equal to 980MPa, the yield strength is more than or equal to 510MPa, the elongation is more than or equal to 10 percent, and the tread hardness of the steel rail is more than or equal to 310 HB.
Compared with the prior art, the invention has the beneficial technical effects that:
after the steel rail is hot rolled, the tensile strength is more than or equal to 980MPa, the yield strength is more than or equal to 510MPa, the elongation is more than or equal to 10%, the tread hardness of the steel rail is more than or equal to 310HB, and the AREMA-2019 standard is met.
Detailed Description
The invention provides a production method of a carbon steel rail meeting AREMA-2019 standard strength, wherein the steel rail material comprises the following chemical components in percentage by mass: c: 0.75 to 0.85; si: 0.45 to 0.6; mn: 1.0 to 1.2; p is less than or equal to 0.020; s is less than or equal to 0.020; cr: 0.2 to 0.3. The hot-rolled steel rail is characterized in that the tensile strength of the hot-rolled steel rail is more than or equal to 980MPa, the yield strength is more than or equal to 510MPa, the elongation is more than or equal to 10%, and the tread hardness of the steel rail is more than or equal to 310 HB. The invention also provides a production method of the hot-rolled American standard carbon steel rail material, which comprises the following steps: smelting, heating and rolling; wherein the heating temperature is 1200 ℃; the tapping temperature is not lower than 1100 ℃; the rolling temperature is 1100-1130 ℃, and the finishing temperature is less than 930 ℃.
The process route of the production test is as follows: blast furnace molten iron-molten iron pretreatment-converter smelting-LF external refining-VD vacuum degassing-bloom continuous casting; the method comprises the steps of feeding, a stepping heating furnace, high-pressure water primary dephosphorization, BD1 cogging, BD2 cogging, high-pressure water secondary dephosphorization, CCS universal rolling, thermal printing, thermal sawing, pre-bending, stepping cooling bed cooling, long-scale straightening, detection center, combined sawing and drilling, appearance and surface quality inspection, warehousing and outward development.
The preparation process specifically comprises the following steps:
1) pretreating molten iron: the molten iron is subject to desulfurization pretreatment, the P is required to be less than or equal to 0.12 percent, the S is required to be less than or equal to 0.0.030 percent, and the other raw materials meet the requirements of corresponding standards.
2) Smelting in a converter: the end point control C is more than or equal to 0.06 percent, the tapping temperature T (DEG C) is more than 1610, silicomanganese, ferromanganese and ferrosilicon alloy are adopted for in-tank deoxidation alloying, and a heavy rail carburant is adopted for converter carburant.
3) Refining in an LF furnace: sufficient heating time is needed after the refined slag charge is added, the slag charge is ensured to be completely melted, the foam slag is formed as soon as possible, the submerged arc operation is realized, and the aim of white slag operation is achieved. The alkalinity of the slag is controlled to be more than or equal to 2.0.
TABLE 1 refining chemistry
| Smelting number | C/％ | Si/％ | Mn/％ | P/％ | S/％ | Cr/％ |
| 22900733 | 0.7000 | 0.4800 | 1.0400 | 0.0120 | 0.0090 | 0.1360 |
| 22900734 | 0.7700 | 0.4800 | 1.0500 | 0.0120 | 0.0150 | 0.1380 |
| 22900735 | 0.8100 | 0.5200 | 1.1500 | 0.0190 | 0.0040 | 0.1720 |
4) VD vacuum degassing: the deep vacuum time is more than or equal to 15min, the vacuum degree is less than 0.1KPa, the soft blowing time after the vacuum treatment is over or equal to 15min, and molten steel cannot be exposed during the soft blowing period;
5) continuous casting: the liquid level is automatically controlled in the casting process, and electromagnetic stirring is normally used; liquidus temperature of steel grade: 1461 ℃, the superheat degree of the continuous casting molten steel is between 15 ℃ and 25 ℃, the fluctuation range is small and is not more than 30 ℃, and the constant drawing speed is adopted. The specific components are shown in Table 2
TABLE 2 ingredient content of the continuously cast product
| Smelting number | C/％ | Si/％ | Mn/％ | P/％ | S/％ | Cr/％ |
| 22900733 | 0.8000 | 0.5600 | 1.1500 | 0.0130 | 0.0070 | 0.2300 |
| 22900734 | 0.7800 | 0.5700 | 1.1900 | 0.0130 | 0.0030 | 0.2370 |
| 22900735 | 0.8100 | 0.5700 | 1.1800 | 0.0170 | 0.0020 | 0.2320 |
6) Heating a steel billet: the total heating time is more than 50 minutes, and the heating temperature of each section is shown in Table 3.
TABLE 3 American standard carbon steel rail heating process
| Preheating section | Heating stage 1 | Heating 2 stages | Soaking section | |
| Temperature of | ≤800℃ | 1150-1280℃ | ≤1200℃ | 1150-1260℃ |
7) Rolling temperature: rolling the casting blank into a steel rail by a universal rolling mill, wherein the initial rolling temperature is as follows: 1070-: less than 930 ℃.
After rolling, the finished steel rail with 3 furnaces is subjected to detailed detection on various indexes such as conventional tensile property, tread hardness and the like according to the AREMA-2019 standard strength carbon steel rail, and detection results show that various conventional properties and special properties meet the standard requirements, and specific detection results are shown in tables 4 and 5.
TABLE 4 test results of tensile Properties of rails
TABLE 5 hardness and elongation test results of rails
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (3)
1. A production method of carbon steel rail with American standard strength is characterized in that: the method comprises the following steps:
1) pretreating molten iron: the molten iron is subject to desulfurization pretreatment, the requirement that [ P ] is less than or equal to 0.12 percent and [ S ] is less than or equal to 0.0.030 percent, and the rest raw materials meet the requirements of corresponding standards;
2) smelting in a converter: controlling the end point C to be more than or equal to 0.06 percent, controlling the tapping temperature T (DEG C) to be more than 1610, carrying out in-tank deoxidation alloying by adopting silicomanganese, ferromanganese and ferrosilicon alloy, and carrying out converter recarburization by adopting a heavy rail recarburizing agent;
3) refining in an LF furnace: sufficient heating time is needed after the refined slag charge is added, the slag charge is ensured to be completely melted, foam slag is formed as soon as possible, submerged arc operation is realized, the aim of white slag operation is achieved, and the alkalinity of the slag is controlled to be more than or equal to 2.0;
4) VD vacuum degassing: the deep vacuum time is more than or equal to 15min, the vacuum degree is less than 0.1KPa, the soft blowing time after the vacuum treatment is over or equal to 15min, and molten steel cannot be exposed during the soft blowing period;
5) continuous casting: the liquid level is automatically controlled in the casting process, and electromagnetic stirring is normally used; liquidus temperature of steel grade: 1461 ℃, the superheat degree of the continuous casting molten steel is between 15 ℃ and 25 ℃, the fluctuation range is small and is not more than 30 ℃, and the constant drawing speed is adopted;
6) heating a steel billet: the total heating time is more than 50 minutes, and the heating temperature of each section is as follows: the preheating section is less than or equal to 800 ℃, the heating section 1 is 1150-1280 ℃, the heating section 2 is less than or equal to 1200 ℃, and the soaking section 1150-1260 ℃;
7) rolling temperature: rolling the casting blank into a steel rail by a universal rolling mill, wherein the initial rolling temperature is as follows: 1070 ℃ and 1130 ℃, the finishing temperature is based on the second rolling temperature, and the steel rail finishing rolling target temperature is as follows: less than 930 ℃.
2. The method for producing the carbon steel rail with American standard strength according to claim 1, wherein the method comprises the following steps: the steel rail material comprises the following chemical components in percentage by mass: c: 0.75 to 0.85; si: 0.45 to 0.6; mn: 1.0 to 1.2; p is less than or equal to 0.020; s is less than or equal to 0.020; cr: 0.2 to 0.3, and the balance of Fe and inevitable impurities.
3. The method for producing the carbon steel rail with American standard strength according to claim 1, wherein the method comprises the following steps: the tensile strength of the hot rolled steel rail is more than or equal to 980MPa, the yield strength is more than or equal to 510MPa, the elongation is more than or equal to 10 percent, and the tread hardness of the steel rail is more than or equal to 310 HB.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210706619.9A CN115029506A (en) | 2022-06-21 | 2022-06-21 | Production method of carbon steel rail with American standard strength |
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| CN202210706619.9A CN115029506A (en) | 2022-06-21 | 2022-06-21 | Production method of carbon steel rail with American standard strength |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116254453A (en) * | 2023-02-09 | 2023-06-13 | 包头钢铁（集团）有限责任公司 | Smelting method of strength steel rail in American standard |
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|---|---|---|---|---|
| JPH07150235A (en) * | 1993-11-26 | 1995-06-13 | Nippon Steel Corp | Production of rail having high strength, high ductility, and high toughness |
| US20110189047A1 (en) * | 2010-02-02 | 2011-08-04 | Transportation Technology Center, Inc. | Railroad rail steels resistant to rolling contact fatigue |
| CN106636916A (en) * | 2016-11-30 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | Rolled steel for steel rails of America railways and production method of rolled steel |
| CN107299284A (en) * | 2017-05-27 | 2017-10-27 | 内蒙古包钢钢联股份有限公司 | Inexpensive anvil faced rail and its production technology |
| CN109023060A (en) * | 2018-08-28 | 2018-12-18 | 包头钢铁（集团）有限责任公司 | The production method of rail and rail |
| CN112267063A (en) * | 2020-09-09 | 2021-01-26 | 邯郸钢铁集团有限责任公司 | Wear-resistant hot-rolled steel rail and production method thereof |
| CN112877586A (en) * | 2021-01-12 | 2021-06-01 | 包头钢铁（集团）有限责任公司 | Production method of high-strength and high-toughness American-standard steel rail for CR175 crane |
-
2022
- 2022-06-21 CN CN202210706619.9A patent/CN115029506A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07150235A (en) * | 1993-11-26 | 1995-06-13 | Nippon Steel Corp | Production of rail having high strength, high ductility, and high toughness |
| US20110189047A1 (en) * | 2010-02-02 | 2011-08-04 | Transportation Technology Center, Inc. | Railroad rail steels resistant to rolling contact fatigue |
| CN106636916A (en) * | 2016-11-30 | 2017-05-10 | 内蒙古包钢钢联股份有限公司 | Rolled steel for steel rails of America railways and production method of rolled steel |
| CN107299284A (en) * | 2017-05-27 | 2017-10-27 | 内蒙古包钢钢联股份有限公司 | Inexpensive anvil faced rail and its production technology |
| CN109023060A (en) * | 2018-08-28 | 2018-12-18 | 包头钢铁（集团）有限责任公司 | The production method of rail and rail |
| CN112267063A (en) * | 2020-09-09 | 2021-01-26 | 邯郸钢铁集团有限责任公司 | Wear-resistant hot-rolled steel rail and production method thereof |
| CN112877586A (en) * | 2021-01-12 | 2021-06-01 | 包头钢铁（集团）有限责任公司 | Production method of high-strength and high-toughness American-standard steel rail for CR175 crane |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116254453A (en) * | 2023-02-09 | 2023-06-13 | 包头钢铁（集团）有限责任公司 | Smelting method of strength steel rail in American standard |
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