BR112021022882A2 - Production method to reduce the residual stress of heat treated steel rails and steel rails obtained by the same - Google Patents
Production method to reduce the residual stress of heat treated steel rails and steel rails obtained by the sameInfo
- Publication number
- BR112021022882A2 BR112021022882A2 BR112021022882A BR112021022882A BR112021022882A2 BR 112021022882 A2 BR112021022882 A2 BR 112021022882A2 BR 112021022882 A BR112021022882 A BR 112021022882A BR 112021022882 A BR112021022882 A BR 112021022882A BR 112021022882 A2 BR112021022882 A2 BR 112021022882A2
- Authority
- BR
- Brazil
- Prior art keywords
- rail
- cooling
- steel rails
- production method
- residual stress
- Prior art date
Links
Classifications
-
- 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
- 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
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
-
- 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
método de produção para reduzir a tensão residual de trilhos de aço tratados termicamente e trilhos de aço obtidos pelo mesmo. a presente divulgação divulga um método de produção para reduzir a tensão residual de um trilho de aço tratado termicamente. o tratamento de resfriamento acelerado em linha é realizado em um trilho laminado a quente, em que uma temperatura inicial de resfriamento é 700 a 880°c, uma taxa de resfriamento de um boleto de trilho é de 5 a 8°c/s, uma taxa de resfriamento de um fundo de trilho é 1,5 a 3°c/s, e o resfriamento é realizado até que a temperatura do boleto de trilho seja reduzida para 460 a 550°c; em seguida, o tratamento de resfriamento lento é realizado, uma taxa de resfriamento lenta é de 0,5 a 1°c/s, e o resfriamento lento é executado até que a temperatura do boleto de trilho seja reduzida para 350 a 450°c; e a taxa de resfriamento do boleto de trilho seja mantida em 0,5 a 1°c/s, a taxa de resfriamento do fundo de trilho é controlada a 0,5 a 2°c/s, o resfriamento acelerado é interrompido quando uma diferença de temperatura entre o boleto de trilho e o fundo de trilho atinge um determinado intervalo, e o trilho de aço é naturalmente resfriado à temperatura ambiente. a presente divulgação fornece ainda trilhos de aço obtidos por este método de produção. o método fornecido pela presente divulgação pode reduzir efetivamente a tensão residual no fundo de trilho do trilho de aço, prolongar a vida útil do trilho de aço e melhorar a segurança do tráfego.production method to reduce the residual stress of heat treated steel rails and steel rails obtained therefrom. The present disclosure discloses a production method for reducing the residual stress of a heat-treated steel rail. the in-line accelerated cooling treatment is performed on a hot rolled rail, where an initial cooling temperature is 700 to 880°c, a cooling rate of a rail billet is 5 to 8°c/s, a cooling rate of a rail bottom is 1.5 to 3°c/s, and cooling is carried out until the rail ticket temperature is reduced to 460 to 550°c; then the slow cooling treatment is carried out, a slow cooling rate is 0.5 to 1°c/s, and the slow cooling is performed until the rail billet temperature is reduced to 350 to 450°c ; and the rail billet cooling rate is kept at 0.5 to 1°c/s, the rail bottom cooling rate is controlled at 0.5 to 2°c/s, accelerated cooling is stopped when a The temperature difference between the rail billet and the rail bottom reaches a certain range, and the steel rail is naturally cooled to room temperature. the present disclosure further provides steel rails obtained by this production method. The method provided by the present disclosure can effectively reduce the residual stress on the rail bottom of the steel rail, prolong the life of the steel rail, and improve traffic safety.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201910922813.9A CN110592355B (en) | 2019-09-27 | 2019-09-27 | Production method for reducing residual stress of heat-treated steel rail and steel rail obtained by production method |
PCT/CN2020/095377 WO2021057094A1 (en) | 2019-09-27 | 2020-06-10 | Production method that reduces residual stress of heat-treated steel rail and resulting steel rail |
Publications (1)
Publication Number | Publication Date |
---|---|
BR112021022882A2 true BR112021022882A2 (en) | 2022-04-12 |
Family
ID=68863987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR112021022882A BR112021022882A2 (en) | 2019-09-27 | 2020-06-10 | Production method to reduce the residual stress of heat treated steel rails and steel rails obtained by the same |
Country Status (3)
Country | Link |
---|---|
CN (1) | CN110592355B (en) |
BR (1) | BR112021022882A2 (en) |
WO (1) | WO2021057094A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110592355B (en) * | 2019-09-27 | 2020-12-29 | 武汉钢铁有限公司 | Production method for reducing residual stress of heat-treated steel rail and steel rail obtained by production method |
CN111485074B (en) * | 2020-04-07 | 2022-02-25 | 包头钢铁(集团)有限责任公司 | Heating temperature-control type slow cooling dehydrogenation method for alloy steel casting blank |
CN111349862A (en) * | 2020-04-13 | 2020-06-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel rail for high-speed railway and preparation method thereof |
CN111575463B (en) * | 2020-05-12 | 2022-02-01 | 武汉钢铁有限公司 | Production method for reducing torsion of end part of F-shaped rail of magnetic suspension railway |
CN111635987B (en) * | 2020-05-18 | 2022-02-01 | 武汉钢铁有限公司 | Production method for improving residual stress uniformity of full section of F-shaped rail |
CN111621631B (en) * | 2020-05-29 | 2022-03-15 | 武汉钢铁有限公司 | Efficient heat treatment production method for steel rail and steel rail prepared by same |
CN112195413A (en) * | 2020-10-19 | 2021-01-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Fatigue-resistant steel rail of freeze-thaw circulating line and production method thereof |
CN112475821B (en) * | 2020-11-13 | 2022-07-19 | 攀钢集团攀枝花钢铁研究院有限公司 | Low-web residual tensile stress steel rail and preparation method thereof |
CN112877531B (en) * | 2021-01-12 | 2023-01-24 | 包头钢铁(集团)有限责任公司 | Production control method for improving flatness of steel rail after online heat treatment quenching |
CN113977211A (en) * | 2021-10-28 | 2022-01-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Medium-strength steel rail and production method thereof |
CN114250349A (en) * | 2021-12-09 | 2022-03-29 | 邯郸钢铁集团有限责任公司 | Method for improving hardness of heat-treated steel rail tread |
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 |
CN114854963B (en) * | 2022-04-29 | 2023-09-05 | 武汉钢铁有限公司 | Groove-type steel rail with low residual stress and preparation method thereof |
CN115369229A (en) * | 2022-09-13 | 2022-11-22 | 包头钢铁(集团)有限责任公司 | Production control method for improving flatness of turnout steel rail after on-line heat treatment quenching |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1032656C (en) * | 1992-11-26 | 1996-08-28 | 冶金工业部重庆钢铁设计研究院 | Heat treatment method and apparatus for rail |
JPH06279927A (en) * | 1993-03-29 | 1994-10-04 | Nippon Steel Corp | High strength rail excellent in ductility and toughness and its production |
JP5459453B1 (en) * | 2012-04-23 | 2014-04-02 | 新日鐵住金株式会社 | rail |
CN106086622B (en) * | 2016-06-24 | 2017-12-15 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of the heat treatment production method and gained rail of passenger-cargo mixed fortune Rail for railway |
CN106086370B (en) * | 2016-06-24 | 2018-10-09 | 成都先进金属材料产业技术研究院有限公司 | A kind of method reducing rail residual stress and gained rail and its application |
CN107475616B (en) * | 2017-10-10 | 2019-01-04 | 攀钢集团研究院有限公司 | High-strength tenacity pearlite steel rail and its manufacturing method |
CN108504923A (en) * | 2018-03-20 | 2018-09-07 | 包头钢铁(集团)有限责任公司 | Hundred meters of scale 75kg/m burning optimization on line rail of one kind and its production method |
CN109280760B (en) * | 2018-11-30 | 2021-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Pearlite steel rail treatment method |
CN109371219B (en) * | 2018-11-30 | 2021-01-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Pearlite steel rail on-line treatment method |
CN110592355B (en) * | 2019-09-27 | 2020-12-29 | 武汉钢铁有限公司 | Production method for reducing residual stress of heat-treated steel rail and steel rail obtained by production method |
-
2019
- 2019-09-27 CN CN201910922813.9A patent/CN110592355B/en active Active
-
2020
- 2020-06-10 BR BR112021022882A patent/BR112021022882A2/en unknown
- 2020-06-10 WO PCT/CN2020/095377 patent/WO2021057094A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
CN110592355B (en) | 2020-12-29 |
WO2021057094A1 (en) | 2021-04-01 |
CN110592355A (en) | 2019-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BR112021022882A2 (en) | Production method to reduce the residual stress of heat treated steel rails and steel rails obtained by the same | |
BR112015008461A8 (en) | METHOD OF PROCESSING A WORKPIECE TO INHIBIT THE PRECIPITATION OF INTERMETALLIC COMPOUNDS | |
BR112015020046A2 (en) | abrasion resistant steel plate that has low temperature rigidity and method of manufacture | |
BR112017000205A2 (en) | cooling process and equipment | |
BR112017000010A2 (en) | "method of producing an extremely high strength coated or uncoated steel sheet and obtained sheet" | |
BR112012021454A2 (en) | method for producing grain oriented electric steel sheet. | |
BR112017000027A2 (en) | Method for manufacturing a high strength steel sheet and steel sheet | |
BR112018068033A2 (en) | Production method of grain oriented electric steel sheet. | |
BR112017004212A2 (en) | spring or torsion bar, method for producing a spring and / or torsion bar, and applying a steel wire | |
BR112017000023A2 (en) | Method for producing a coated steel blade and coated steel blade | |
BR112017003743A2 (en) | Grain oriented electric steel sheet fabrication method, and nitriding apparatus | |
BR112017008044A2 (en) | method for producing a nitrided steel for packaging | |
BR112018015072A2 (en) | heat treatment process and heat treatment device | |
BR112018016231A2 (en) | method for producing grain oriented electric steel sheet | |
BR112017028512A2 (en) | heat treatment process for r6 level mooring chains | |
BR112018014951A2 (en) | process and device for heat treatment of a metal component | |
BR112015003767A2 (en) | method for manufacturing stabilizer, and heating device | |
CN105855299A (en) | Steel rolling method and steel obtained through method | |
BRPI0606382A2 (en) | process for rolling with increased casting speed and subsequent hot rolling of metal billets, especially of relatively thin steel material, and rolling-casting device | |
MX2016014415A (en) | Hybrid oil and water cooled rolling. | |
MX2020004626A (en) | Hot-rolled steel sheet and manufacturing method therefor. | |
BR112017002702A2 (en) | hardened head rail manufacturing method and manufacturing apparatus | |
RU2016117287A (en) | METHOD FOR DEFORMATION AND THERMAL TREATMENT OF HIGH Manganese Steel | |
BR112017000096A2 (en) | process to control austenite grain size, and, steel product. | |
BR112018071976A2 (en) | process for producing sliding bearing composite materials, sliding bearing composite materials and sliding element of these sliding bearing composite materials |