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RU2016100168A - STEEL RAIL OF HIGH IMPACT VISCOSITY AND METHOD OF ITS PRODUCTION - Google Patents

STEEL RAIL OF HIGH IMPACT VISCOSITY AND METHOD OF ITS PRODUCTION Download PDF

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Publication number
RU2016100168A
RU2016100168A RU2016100168A RU2016100168A RU2016100168A RU 2016100168 A RU2016100168 A RU 2016100168A RU 2016100168 A RU2016100168 A RU 2016100168A RU 2016100168 A RU2016100168 A RU 2016100168A RU 2016100168 A RU2016100168 A RU 2016100168A
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Prior art keywords
steel
rail
cooling
steel rail
rolling
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RU2016100168A
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Russian (ru)
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RU2634807C2 (en
Inventor
Цзюнь Юань
Мин ЦЗОУ
Хуа ГО
Дадун ЛИ
Юн ДЭН
Чжэнью ХАНЬ
Юань ВАН
Чунму ЧЭНЬ
Original Assignee
Паньган Груп Паньчжихуа Айрон Энд Стил Рисёч Инститьют Ко., Лтд.
ПаньГан Груп Паньчжихуа Стил энд Вэнэдиум КО., Лтд.
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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
    • C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
    • 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
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1213—Accessories for subsequent treating or working cast stock in situ for heating or insulating strands
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/60—Aqueous agents
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
    • C21D1/613—Gases; Liquefied or solidified normally gaseous material
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/84—Controlled slow cooling
    • 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
    • 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
    • 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
    • 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
    • C22C38/02—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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatment Of Steel (AREA)
  • Metal Rolling (AREA)

Claims (13)

1. Стальной рельс высокой ударной вязкости, характеризующийся тем, что представляет собой рельс из перлитной стали, в которой межпластиночное расстояние составляет 0,05~0,09 мкм, а работа разрушения при нормальной температуре равна 30~35 Дж; причем химический состав стального рельса составляет в масс. %: С 0,71-0,82, Si 0,25-0,45, Mn 0,75-1,05, V 0,03-0,15, Р≤0,030, S≤0,035, Al≤0,040, где остальное составляют Fe и неизбежные примеси.1. Steel rail of high impact strength, characterized in that it is a rail made of pearlitic steel, in which the plate-to-plate distance is 0.05 ~ 0.09 μm, and the fracture work at normal temperature is 30 ~ 35 J; and the chemical composition of the steel rail is in mass. %: C 0.71-0.82, Si 0.25-0.45, Mn 0.75-1.05, V 0.03-0.15, P≤0.030, S≤0.035, Al≤0.040, where the rest is Fe and inevitable impurities. 2. Стальной рельс по п. 1, отличающийся тем, что имеет следующий химический состав в масс. %: С 0,71~0,82, Si 0,25~0,45, Mn 0,75~1,05, V 0,03~0,15, Р≤0,030, S≤0,035, Al≤0,020, где остальное составляют Fe и неизбежные примеси.2. The steel rail according to claim 1, characterized in that it has the following chemical composition in mass. %: C 0.71 ~ 0.82, Si 0.25 ~ 0.45, Mn 0.75 ~ 1.05, V 0.03 ~ 0.15, P≤0.030, S≤0.035, Al≤0.020, where the rest is Fe and inevitable impurities. 3. Стальной рельс по п. 1, отличающийся тем, что имеет следующий химический состав в масс. %: С 0,72~0,76, Si 0,35~0,37, Mn 0,95~0,99, V 0,05~0,09, Р≤0,012, S≤0,011, Al≤0,04, где остальное составляют Fe и неизбежные примеси.3. The steel rail according to claim 1, characterized in that it has the following chemical composition in mass. %: C 0.72 ~ 0.76, Si 0.35 ~ 0.37, Mn 0.95 ~ 0.99, V 0.05 ~ 0.09, P≤0.012, S≤0.011, Al≤0, 04, where the rest is Fe and inevitable impurities. 4. Стальной рельс по любому из пп. 1-3, отличающийся тем, что имеет следующие механические свойства: Rp0,2: 800~860 МПа, Rm: 1,300~1,350 МПа, А: 13~15%, Z: 31~35%.4. Steel rail according to any one of paragraphs. 1-3, characterized in that it has the following mechanical properties: Rp0.2: 800 ~ 860 MPa, Rm: 1,300 ~ 1,350 MPa, A: 13 ~ 15%, Z: 31 ~ 35%. 5. Способ производства стального рельса высокой ударной вязкости по любому из пп. 1-4, характеризующийся тем, что включает получение стали, литье, прокат и послепрокатную термообработку, где послепрокатная термообработка включает следующие шаги:5. A method of manufacturing a steel rail of high impact strength according to any one of paragraphs. 1-4, characterized in that it includes the production of steel, casting, rolling and post-rolling heat treatment, where post-rolling heat treatment includes the following steps: a. ускоренное охлаждение: нанесение охлаждающей среды вещества на поверхность катания головки рельса, две стороны головки рельса и центральную часть рельсовой подошвы для ускоренного охлаждения со скоростью 1,0~5,0°С/с при этом температура в центральной части поверхности катания головки рельса, на двух сторонах головки рельса и в центральной части катаного стального рельса составляет 650~900°С;a. accelerated cooling: applying a cooling medium to the rolling surface of the rail head, two sides of the rail head and the central part of the rail sole for accelerated cooling at a speed of 1.0 ~ 5.0 ° C / s, while the temperature in the central part of the rolling surface of the rail head, two sides of the rail head and in the central part of rolled steel rail is 650 ~ 900 ° C; b. воздушное охлаждение: прекращение ускоренного охлаждения при падении температуры на поверхности катания головки рельса до 400~550°С, а также воздушное охлаждение стального рельса до комнатной температуры, для получения рельса из перлитной стали с межпластиночным расстоянием 0,05~0,09 мкм.b. air cooling: the cessation of accelerated cooling when the temperature on the surface of the rail head drops to 400 ~ 550 ° C, as well as air cooling of the steel rail to room temperature, to obtain a pearlite steel rail with an interplate distance of 0.05 ~ 0.09 μm. 6. Способ по п. 5, отличающийся тем, что в процессе получения стали расплавленный чугун с низким содержанием серы загружают в сталеплавильную печь при добавлении высокощелочного рафинировочного шлака, а в качестве горючего при получении стали используют тощий уголь и сплав с низким содержанием азота.6. The method according to p. 5, characterized in that in the process of producing steel, molten low-sulfur cast iron is loaded into a steelmaking furnace when high-alkali refining slag is added, and lean coal and a low nitrogen alloy are used as fuel in the production of steel. 7. Способ по п. 5, отличающийся тем, что процесс получения стали включает плавку в конверторе или электрической печи, рафинирование в НЧ-печи и RH- или VD-вакуумирование, причем при нагреве во время рафинирования в НЧ-печи используют пенообразующий агент.7. The method according to p. 5, characterized in that the steel production process includes melting in a converter or electric furnace, refining in a low-frequency furnace and RH or VD-vacuum, and when heated during refining in a low-frequency furnace, a foaming agent is used. 8. Способ по п. 5, отличающийся тем, что процесс литья представляет собой литье с полной защитой, а после литья стальная заготовка подвергается медленному охлаждению.8. The method according to p. 5, characterized in that the casting process is a casting with full protection, and after casting the steel billet is subjected to slow cooling. 9. Способ по п. 8, отличающийся тем, что после медленного охлаждения стальную заготовку нагревают для аустенизации перед прокатом, причем температура выпуска после процесса нагрева составляет 1000°С.9. The method according to p. 8, characterized in that after slow cooling the steel billet is heated for austenization before rolling, and the discharge temperature after the heating process is 1000 ° C. 10. Способ по п. 5, отличающийся тем, что в качестве охлаждающего вещества используют сжатый воздух или смесь водяного тумана и воздуха.10. The method according to p. 5, characterized in that as the cooling substance using compressed air or a mixture of water mist and air. 11. Способ по любому из пп. 6-9, отличающийся тем, что в качестве охлаждающего вещества используют сжатый воздух или смесь водяного тумана и воздуха.11. The method according to any one of paragraphs. 6-9, characterized in that as the cooling substance using compressed air or a mixture of water mist and air.
RU2016100168A 2015-01-07 2016-01-11 Steel rail of high toughness and method of its manufacture RU2634807C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510006025.7 2015-01-07
CN201510006025.7A CN104480390B (en) 2015-01-07 2015-01-07 Steel rail with high impact toughness and production method thereof

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