A high cold-resistant steel plate for railway bogie and a production method thereof

Abstract

The application discloses a kind of high cold-resistant railway bogie steel plate and production method thereof, belong to metallurgical technical field, the chemical composition of the steel plate and its mass percentage composition are as follows: C:0.06~0.08%, Mn:1.20~1.35%, Cr:0.45~0.55%, P≤0.012%, S≤0.003%, Nb:0.015~0.035%, V:0.03~0.05%, Ni:0.15~0.30%, Cu:0.25~0.35%, the rest is Fe and inevitable impurities, the sum of above components is 100%;The production method adopts the component design of low C content, through the mode of compound Nb, V, Cr, Ni, Cu alloy, special smelting method and special rolling controlled cooling mode, excellent internal quality, good-55 ℃ low temperature toughness and excellent atmospheric corrosion resistance, welding performance and fatigue performance are obtained.

Description

TECHNICAL FIELD

[0001] The application relates to a steel production method, in particular to a high-cold-resistance railway bogie steel production method, and belongs to the technical field of metallurgy. BACKGROUND

[0002] With the continuous increase of the speed of passenger cars, the reliability and safety of railway vehicles are particularly important. The bogie is a key component for ensuring the safe operation of trains, especially high-speed trains, which mainly have the functions of bearing, guiding, damping, traction, braking and the like. The bogie cannot run fast and stably without the bogie. The bogie steel requires sufficient strength and stiffness, and also requires appropriate elasticity, good impact resistance and fatigue resistance, so as to meet the use safety and operation quality of passenger cars, motor cars and high-speed rails.

[0003] At present, only a few steel enterprises in Europe and Japan in the world can mass-produce high-speed train bogies, the selling price is extremely high, the order cycle is long, and the development of China's rail manufacturing industry is seriously restricted.

[0004] With the promotion of China's high-speed rail policy, the operation climate environment of high-speed trains will inevitably become complex and diverse, including the harsh environment operation in the high-cold regions such as northern Europe. However, the plasticity of materials sharply decreases under low-temperature environment, which is prone to brittle fracture, causing sudden safety accidents and economic losses. In order to realize the safe, reliable and high-speed operation of trains and realize the development strategy of high-speed railway vehicles in China, it is of great significance to develop high-cold-resistance railway bogie steel.

[0005] At present, the domestic bogie manufacturers with certain production experience mainly include Baosteel, Anshan Iron and Steel and Wugang. The international standard of railway bogie yield strength 355MPa grade weathering steel usually only does-20℃ low-temperature impact, and the domestic standard has the minimum temperature of-40℃. The technical requirement of-55℃ low-temperature impact weathering steel has not been developed at home and abroad.

[0006] Patent CN110592478B is a kind of railway bogie weathering steel and its manufacturing method. The railway bogie weathering steel is obtained by reasonably arranging the chemical composition, optimizing the addition amount of C, Mn, P and S elements, reasonably adding other alloy elements according to the upper limit value of carbon equivalent, ensuring the corrosion resistance of the steel plate and the excellent welding performance and high strength and toughness, adopting advanced rolling control technology, refining the grain size of austenite and ferrite, and obtaining uniform internal organization. Reasonably arrange the descaling equipment, optimize the descaling process in the rolling descaling process, adopt 4 passes of rough rolling descaling, the first pass of precision rolling descaling, and the descaling system of separating the descaling of precision rolling from that of rough rolling, to ensure the cleanliness of the surface of the steel plate. The surface quality of the steel is excellent, and the internal quality is high in purity. However, it can only do-40℃ low-temperature impact, and cannot meet the low-temperature impact at a lower temperature.

[0007] Therefore, it is an urgent problem for those skilled in the art to develop a high cold-resistant steel for railway bogies to overcome the above defects. SUMMARY

[0008] The technical problem solved by the present application is to provide a production method of high cold-resistant steel for railway bogies, which adopts a low C content composition design, and through the composite addition of Nb, V, Cr, Ni and Cu alloys, a special smelting method, a special rolling and controlled cooling mode and a tempering process, excellent internal quality, good low temperature toughness at-55℃, and excellent atmospheric corrosion resistance, welding performance and fatigue performance are obtained.

[0009] The technical solution of the present application to solve the above technical problems is:

[0010] A high cold-resistant steel plate for railway bogies, characterized in that the chemical composition and mass percentage of the steel plate are: C: 0.06-0.08%, Mn: 1.20-1.35%, Cr: 0.45-0.55%, P≤0.012%, S≤0.003%, Nb: 0.015-0.035%, V: 0.03-0.05%, Ni: 0.15-0.30%, Cu: 0.25-0.35%, the rest being Fe and unavoidable impurities, and the sum of the above components being 100%.

[0011] The further defined technical solution of the present application is:

[0012] Further, in the aforementioned cold-resistant steel plate for railway bogies, the chemical composition and mass percentage of the steel plate are: C: 0.073%, Mn: 1.28%, Cr: 0.47%, P: 0.012%, S: 0.002%, Nb: 0.020%, V: 0.031%, Ni: 0.20%, Cu: 0.25%, the rest being Fe and unavoidable impurities, and the sum of the above components being 100%.

[0013] In the aforementioned cold-resistant steel plate for railway bogies, the chemical composition and mass percentage of the steel plate are: C: 0.0652%, Mn: 1.22%, Cr: 0.48%, P: 0.010%, S: 0.003%, Nb: 0.018%, V: 0.036%, Ni: 0.27%, Cu: 0.26%, the rest being Fe and unavoidable impurities, and the sum of the above components being 100%.

[0014] The chemical composition and mass percentage of the aforementioned high cold-resistant railway bogie steel plate are as follows: C: 0.073%, Mn: 1.23%, Cr: 0.52%, P: 0.009%, S: 0.001%, Nb: 0.017%, V: 0.035%, Ni: 0.30%, Cu: 0.25%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%.

[0015] The chemical composition and mass percentage of the aforementioned high cold-resistant railway bogie steel plate are as follows: C: 0.074%, Mn: 1.25%, Cr: 0.48%, P: 0.010%, S: 0.001%, Nb: 0.022%, V: 0.033%, Ni: 0.25%, Cu: 0.28%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%.

[0016] The chemical composition and mass percentage of the aforementioned high cold-resistant railway bogie steel plate are as follows: C: 0.063%, Mn: 1.27%, Cr: 0.47%, P: 0.011%, S: 0.002%, Nb: 0.020%, V: 0.031%, Ni: 0.26%, Cu: 0.26%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%.

[0017] The aforementioned high cold-resistant railway bogie steel plate has a thickness of 8-50 mm.

[0018] The application also designs a production method of the high cold-resistant railway bogie steel plate, which comprises the following processes: raw material preparation, molten iron pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling.

[0019] (1) The steel plate is refined by LF and RH to ensure that the gas H content of the steel plate is ≤2 ppm, the N content is ≤50 ppm, the RH vacuum time is controlled to be ≥30 minutes, and the static stirring time is controlled to be ≥20 minutes.

[0020] (2) The rolling process controls the opening rolling temperature of the steel plate to be 830-900 ℃.

[0021] (3) The red temperature of the steel plate in the controlled cooling process is controlled to be 640-700 ℃.

[0022] (4) The heat treatment process adopts rapid tempering at a temperature of 500-600 ℃.

[0023] The application is further limited by the technical scheme:

[0024] Further, in the production method of the high cold-resistant railway bogie steel plate, the steel plate is refined by LF and RH, and the inclusion level is less than or equal to 1.5 according to GB / T10561 A evaluation criteria, and the inclusions can be divided into five categories according to the shape and distribution of the inclusions, and the total of A+B+C+D inclusions is less than or equal to 4.5.

[0025] In the production method of the high cold-resistant railway bogie steel plate, the yield strength of the steel plate is greater than or equal to 355 MPa, the tensile strength is 490-630 MPa, the elongation is greater than or equal to 22%, the impact at-55 DEG C is greater than or equal to 100 J, and the Z-direction performance is greater than or equal to 35%.

[0026] The beneficial effects of the present application are:

[0027] The present application adopts the LF+RH external refining method, and the RH vacuum time is controlled to be greater than or equal to 30 minutes, and the static stirring time is controlled to be greater than or equal to 20 minutes, so that the oxygen and inclusions in the molten steel are fully removed to obtain high-purity internal quality.

[0028] The steel plate is rolled at a rolling temperature of 830-900 DEG C, the deformed austenite grains are elongated and flattened, and the deformation energy accumulation is increased, so that very fine ferrite grain size is obtained during the subsequent austenite-ferrite phase transformation, so that the strength and toughness of the steel plate are improved.

[0029] In the heat treatment process, the steel plate is rapidly tempered at a temperature of 500-600 DEG C, the carbides of Nb, V and Ti are precipitated, the yield strength of the steel plate is significantly improved, the internal stress of the steel plate is eliminated, and the cutting deformation of the steel plate is prevented.

[0030] The steel plate has the characteristics of few internal inclusions and long fatigue life, the yield strength of the steel plate is greater than or equal to 355 MPa, the tensile strength is 490-630 MPa, the impact at-55 DEG C is greater than or equal to 100 J, and the Z-direction performance is greater than or equal to 35%, which can meet the use requirements in different low-temperature environments, the low-carbon and nickel-chromium-copper composite design is adopted to improve the atmospheric corrosion resistance (I is greater than or equal to 6.0). DETAILED DESCRIPTION

[0031] The present application will be described clearly and completely in combination with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application. EMBODIMENT

[0032] The present embodiment provides a high cold-resistant railway bogie steel plate with a thickness of 8 mm, and the chemical composition and mass percentage are shown in Table 1.

[0033] The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, hot metal pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling, wherein:

[0034] (1) The steel plate is refined by LF and RH, the gas H content of the steel plate is 1.2 ppm, the N content is 32 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, and the inclusion level of each type of inclusion is less than 1.0 according to the GB / T10561 A evaluation criterion, and the total inclusion is 3.5;

[0035] (2) The rolling process controls the opening rolling temperature of the steel plate to be 900℃;

[0036] (3) The red temperature of the steel plate in the controlled cooling process is controlled to be 670℃;

[0037] (4) The rapid tempering at a temperature of 530℃ is adopted in the heat treatment process, alloy carbide is precipitated, the yield strength of the steel plate is improved, and the internal stress of the steel plate is eliminated.

[0038] The mechanical properties of the high-cold-resistance railway bogie steel plate obtained in the embodiment are shown in Table 2. Embodiment

[0039] The embodiment provides a high-cold-resistance railway bogie steel plate with a thickness of 16mm, the chemical composition and mass percentage of which are shown in Table 1.

[0040] The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, hot metal pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling, wherein:

[0041] (1) The steel plate is refined by LF and RH, the gas H content of the steel plate is 1.5 ppm, the N content is 35 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, the inclusion level of each type of inclusion is less than 1.0 according to the GB / T10561 A evaluation criterion, and the total inclusion is 3.0;

[0042] (2) The rolling process controls the opening rolling temperature of the steel plate to be 890℃;

[0043] (3) The red temperature of the steel plate in the controlled cooling process is controlled to be 700℃;

[0044] (4) The rapid tempering at a temperature of 500℃ is adopted in the heat treatment process, alloy carbide is precipitated, the yield strength of the steel plate is improved, and the internal stress of the steel plate is eliminated.

[0045] The mechanical properties of the high cold-resistant steel plate for railway bogie obtained in the embodiment are shown in Table 2. Embodiment

[0046] The embodiment provides a high cold-resistant steel plate for railway bogie with a thickness of 30 mm, and chemical component composition and mass percentage of the high cold-resistant steel plate are shown in Table 1.

[0047] The production method of the high cold-resistant steel plate for railway bogie comprises the following processes: raw material preparation, molten iron pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering and sampling, and wherein:

[0048] (1) The steel plate is refined by LF and RH, so that the gas H content of the steel plate is 1.1 ppm, the N content is 36 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, and the static stirring time is controlled to be greater than or equal to 20 minutes; according to the GB / T10561 A method evaluation criterion, the level of all kinds of inclusions is less than or equal to 0.5, and the total inclusions is 2.5;

[0049] (2) The rolling process controls the opening rolling temperature of the steel plate to be 870 DEG C;

[0050] (3) The red temperature of the steel plate is controlled to be 640 DEG C in the controlled cooling process;

[0051] (4) The rapid tempering at a temperature of 550 DEG C is adopted in the heat treatment process, alloy carbide is precipitated, the yield strength of the steel plate is improved, and the internal stress of the steel plate is eliminated.

[0052] The mechanical properties of the high cold-resistant steel plate for railway bogie obtained in the embodiment are shown in Table 2. Embodiment

[0053] The embodiment provides a high cold-resistant steel plate for railway bogie with a thickness of 40 mm, and chemical component composition and mass percentage of the high cold-resistant steel plate are shown in Table 1.

[0054] The production method of the high cold-resistant steel plate for railway bogie comprises the following processes: raw material preparation, molten iron pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering and sampling, and wherein:

[0055] (1) The steel plate is refined by LF and RH, so that the gas H content of the steel plate is 1.5 ppm, the N content is 33 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, and the static stirring time is controlled to be greater than or equal to 20 minutes; according to the GB / T10561 A method evaluation criterion, the level of all kinds of inclusions is less than or equal to 0.5, and the total inclusions is 2.0;

[0056] (2) The rolling process controls the opening temperature of the steel plate to be 830℃;

[0057] (3) The red temperature of the steel plate is controlled to be 650℃ in the controlled cooling process;

[0058] (4) The steel plate is rapidly tempered at 590℃ in the heat treatment process, the alloy carbide is precipitated, the yield strength of the steel plate is improved, and the internal stress of the steel plate is eliminated.

[0059] The mechanical properties of the high cold-resistant steel plate for railway bogie obtained in the embodiment are shown in Table 2. Embodiment

[0060] The embodiment provides a high cold-resistant steel plate for railway bogie with a thickness of 50mm, and the chemical composition and mass percentage of the high cold-resistant steel plate are shown in Table 1.

[0061] The production method of the high cold-resistant steel plate for railway bogie includes the following processes: raw material preparation, molten iron pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet cold storage, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling, wherein:

[0062] (1) The steel plate is refined by LF and RH, the gas H content of the steel plate is ensured to be 1.8ppm, the N content is 35ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, the inclusion level is less than or equal to 1.0 according to the GB / T10561 A method evaluation criterion, and the total inclusion is 2.5;

[0063] (2) The rolling process controls the opening temperature of the steel plate to be 838℃

[0064] (3) The red temperature of the steel plate is controlled to be 640℃ in the controlled cooling process;

[0065] (4) The steel plate is rapidly tempered at 600℃ in the heat treatment process, the alloy carbide is precipitated, the yield strength of the steel plate is improved, and the internal stress of the steel plate is eliminated.

[0066] The mechanical properties of the high cold-resistant steel plate for railway bogie obtained in the embodiment are shown in Table 2.

[0067] Table 1 Chemical composition of the steel plate in Examples 1-5

[0068] Example No. C Mn P S Cr Nb V Ni Cu Atmospheric corrosion resistance factor I 1 0.073 1.28 0.012 0.002 0.47 0.020 0.031 0.20 0.25 6.2 2 0.0652 1.22 0.010 0.003 0.48 0.018 0.036 0.27 0.26 6.3 3 0.073 1.23 0.009 0.001 0.52 0.017 0.035 0.30 0.25 6.2 4 0.074 1.25 0.010 0.001 0.48 0.022 0.033 0.25 0.28 6.4 5 0.063 1.27 0.011 0.002 0.47 0.020 0.031 0.26 0.26 6.3

[0069] The balance in Table 1 is Fe and unavoidable impurities, and the sum of the above components is 100%.

[0070] Table 2 Mechanical property data of the steel plate in Examples 1-5

[0071] Example No. Yield strength Mpa Tensile strength Mpa Elongation % Impact energy at -55°C J Z-directional properties 1 425 550 25 270，267，280 / 2 410 555 26.5 301，290，299 55，58，60 3 442 562 24 279，291，288 65，68，59 4 432 570 26 292，289，298 67，70，68 5 440 565 23 299，290，287 70，71，66

[0072] As shown in Tables 1 and 2, the production method of the present application adopts a low C content component design, through the composite addition of Nb, V, Cr, Ni, Cu alloys, a special smelting method and a special rolling and controlled cooling mode, to obtain high-purity steel plate internal quality, good-55℃ low temperature toughness and excellent atmospheric corrosion resistance, welding performance and fatigue performance.

[0073] In addition to the above embodiments, the present application can have other implementation manners. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A method for producing a high cold resistance railway bogie steel plate, characterized by: The steel plate has the following chemical composition and mass percentage: C: 0.073%, Mn: 1.28%, Cr: 0.47%, P: 0.012%, S: 0.002%, Nb: 0.020%, V: 0.031%, Ni: 0.20%, Cu: 0.25%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%; The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, hot metal pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling, wherein: (1) the steel plate is refined by LF and RH, the gas H content of the steel plate is 1.2 ppm, the N content is 32 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, and the inclusion level of each type of inclusion is less than 1.0 level according to the GB / T10561 A evaluation criterion, and the total inclusion is 3.5 level; (2) the rolling process controls the opening rolling temperature of the steel plate to be 900 DEG C; (3) the red temperature of the steel plate in the controlled cooling process is controlled to be 670 DEG C; (4) rapid tempering is performed at a temperature of 530 DEG C; The produced steel plate has a thickness of 8 mm, a yield strength of 425 MPa, a tensile strength of 550 MPa, and an elongation of 25%.

2. A method for producing a high cold resistance railway bogie steel plate, characterized by: The steel plate has the following chemical composition and mass percentage: C: 0.0652%, Mn: 1.22%, Cr: 0.48%, P: 0.010%, S: 0.003%, Nb: 0.018%, V: 0.036%, Ni: 0.27%, Cu: 0.26%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%; The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, hot metal pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling, wherein: (1) the steel plate is refined by LF and RH, the gas H content of the steel plate is 1.5 ppm, the N content is 35 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, the inclusion level of each type of inclusion is less than 1.0 level according to the GB / T10561 A evaluation criterion, and the total inclusion is 3.0 level; (2) the rolling process controls the opening rolling temperature of the steel plate to be 890 DEG C; (3) the red temperature of the steel plate in the controlled cooling process is controlled to be 700 DEG C; (4) rapid tempering is performed at a temperature of 500 DEG C; The produced steel plate has a thickness of 16 mm, a yield strength of 410 MPa, a tensile strength of 555 MPa, and an elongation of 26.5%.

3. A method for producing a high cold resistance railway bogie steel plate, characterized by: The steel plate has the following chemical composition and mass percentage: C: 0.073%, Mn: 1.23%, Cr: 0.52%, P: 0.009%, S: 0.001%, Nb: 0.017%, V: 0.035%, Ni: 0.30%, Cu: 0.25%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%. The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, hot metal pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling. (1) The steel plate is refined by LF and RH, the gas H content of the steel plate is 1.1 ppm, the N content is 36 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, the inclusion level is 0.5 level or below according to the GB / T10561 A evaluation criterion, and the total inclusion is 2.5 level; (2) The rolling process controls the steel plate rough rolling temperature to be 870 DEG C; (3) The controlled cooling process controls the steel plate red temperature to be 640 DEG C; (4) The steel plate is rapidly tempered at a temperature of 550 DEG C; The produced steel plate has a thickness of 30 mm, a yield strength of 442 MPa, a tensile strength of 562 MPa, and an elongation of 24%.

4. A method for producing a high cold resistance railway bogie steel plate, characterized by: The steel plate has the following chemical composition and mass percentage: C: 0.074%, Mn: 1.25%, Cr: 0.48%, P: 0.010%, S: 0.001%, Nb: 0.022%, V: 0.033%, Ni: 0.25%, Cu: 0.28%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%. The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, hot metal pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling. (1) The steel plate is refined by LF and RH, the gas H content of the steel plate is 1.5 ppm, the N content is 33 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, the inclusion level is 0.5 level or below according to the GB / T10561 A evaluation criterion, and the total inclusion is 2.0 level; (2) The rolling process controls the steel plate rough rolling temperature to be 830 DEG C; (3) The controlled cooling process controls the steel plate red temperature to be 650 DEG C; (4) The steel plate is rapidly tempered at a temperature of 590 DEG C; The produced steel plate has a thickness of 40 mm, a yield strength of 432 MPa, a tensile strength of 570 MPa, and an elongation of 26%.

5. A method for producing a high cold resistance railway bogie steel plate, characterized by: The steel plate has the following chemical composition and mass percentage: C: 0.063%, Mn: 1.27%, Cr: 0.47%, P: 0.011%, S: 0.002%, Nb: 0.020%, V: 0.031%, Ni: 0.26%, Cu: 0.26%, and the rest is Fe and inevitable impurities, and the sum of the above components is 100%; The production method of the high-cold-resistance railway bogie steel plate comprises the following processes: raw material preparation, molten iron pretreatment, converter smelting, LF refining, RH refining, continuous casting, billet inspection, billet stack cooling, billet furnace acceptance, billet heating, billet descaling, rolling, controlled cooling, tempering, and sampling, wherein: (1) The steel plate is refined by LF and RH to ensure that the gas H content of the steel plate is 1.8 ppm, the N content is 35 ppm, the RH vacuum time is controlled to be greater than or equal to 30 minutes, the static stirring time is controlled to be greater than or equal to 20 minutes, and the total amount of inclusions is 2.5 levels according to the GB / T10561 A method evaluation criteria and the inclusion level is less than 1.0 level; (2) The rolling process controls the opening rolling temperature of the steel plate to be 838 ℃; (3) The steel plate is controlled to have a red temperature of 640 ℃ in the controlled cooling process; (4) The steel plate is rapidly tempered at a temperature of 600 ℃; The produced steel plate has a thickness of 50 mm, a yield strength of 440 Mpa, a tensile strength of 565 Mpa, and an elongation of 23%.