CN114622136A - Continuous casting round tube blank for rare earth-containing railway vehicle hub and preparation method thereof - Google Patents
Continuous casting round tube blank for rare earth-containing railway vehicle hub and preparation method thereof Download PDFInfo
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- CN114622136A CN114622136A CN202210178110.1A CN202210178110A CN114622136A CN 114622136 A CN114622136 A CN 114622136A CN 202210178110 A CN202210178110 A CN 202210178110A CN 114622136 A CN114622136 A CN 114622136A
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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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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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
- B22D11/006—Continuous casting of metals, i.e. casting in indefinite lengths of tubes
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- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- 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
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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
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- 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
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- 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
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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)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a continuous casting round pipe blank for a rare earth-containing railway vehicle hub, which comprises the following chemical components in percentage by mass: 0.50-0.60% of C, 0.10-0.40% of Si, 0.70-0.90% of Mn, 0.10-0.30% of Cr, 0.05-0.20% of Mo, 0.02-0.05% of V, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.002-0.006% of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100% in total, and a preparation method thereof is also disclosed. The continuous casting round tube blank for the rare earth-containing railway vehicle hub has high strength, hardness, wear resistance and good toughness and meets the service requirement of the railway vehicle hub.
Description
Technical Field
The invention relates to the technical field of material metallurgy, in particular to a continuous casting round tube blank for a rare earth-containing railway vehicle hub and a preparation method thereof.
Background
With the increase of the capacity of the wheel hub of the railway vehicle, the diversification of products, the improvement of high quality and high added value of the products, the problems of the quality and the supply quantity of the continuous casting round billet for the wheel hub are urgently needed to be solved. At present, compared with foreign products, the steel product quality for wheel production in China has the defects of poor hardness uniformity, insufficient damage resistance and the like, which restrict the development of the rail transit industry in China, and the products of domestic wheel production plants have single structure and lower grade. With the increasing year-by-year investment of rail transit construction and the increasing market demand, the efficient and stable production of high-quality railway wheel steel becomes a future development trend, so that the development of new materials and new processes suitable for the high-speed and heavy-load development requirements of railways in China is urgent.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a continuous casting round pipe blank for a rare earth-containing railway vehicle hub and a preparation method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to a continuous casting round pipe blank for a rare earth-containing railway vehicle hub, which comprises the following chemical components in percentage by mass: 0.50-0.60% of C, 0.10-0.40% of Si, 0.70-0.90% of Mn, 0.10-0.30% of Cr, 0.05-0.20% of Mo, 0.02-0.05% of V, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.002-0.006% of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100%.
Further, the continuous casting round tube blank material for the rare earth-containing railway vehicle hub comprises the following chemical components in percentage by mass: 0.50% of C, 0.10% of Si, 0.70% of Mn, 0.10% of Cr, 0.05% of Mo, 0.02% of V, 0.015% of P, 0.010% of S and 0.002% of RE, and the balance of Fe and inevitable impurities, wherein the mass fraction accounts for 100%.
Further, the continuous casting round tube blank material for the rare earth-containing railway vehicle hub comprises the following chemical components in percentage by mass: 0.55% of C, 0.28% of Si, 0.80% of Mn, 0.20% of Cr, 0.12% of Mo, 0.036% of V, 0.013% of P, 0.008% of S and 0.004% of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100%.
Further, the continuous casting round tube blank material for the rare earth-containing railway vehicle hub comprises the following chemical components in percentage by mass: 0.58 percent of C, 0.35 percent of Si, 0.85 percent of Mn, 0.25 percent of Cr, 0.16 percent of Mo, 0.42 percent of V, 0.012 percent of P, 0.007 percent of S, 0.005 percent of RE and the balance of Fe and trace impurities, wherein the mass fraction is 100 percent.
Further, the continuous casting round tube blank material for the rare earth-containing railway vehicle hub comprises the following chemical components in percentage by mass: 0.52% of C, 0.15% of Si, 0.75% of Mn, 0.15% of Cr, 0.08% of Mo, 0.028% of V, 0.014% of P, 0.009% of S and 0.003% of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100%.
Further, the continuous casting round tube blank material for the rare earth-containing railway vehicle hub comprises the following chemical components in percentage by mass: 0.60 percent of C, 0.40 percent of Si, 0.90 percent of Mn, 0.30 percent of Cr, 0.20 percent of Mo, 0.05 percent of V, 0.010 percent of P, 0.005 percent of S and 0.006 percent of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100 percent.
A preparation method of a continuous casting round pipe blank for a rare earth-containing railway vehicle hub is characterized in that the steel-making production process comprises the following steps: molten iron pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting; wherein:
the converter smelting adopts desulfurized molten iron, the content of slag (FeO) at the smelting end point is reduced, the slag discharge amount of converter tapping is reduced, LF is desulfurized and the components are finely adjusted, 40kg of rare earth alloy is added into molten steel every 100t after LF and before VD, the VD vacuum degree is less than or equal to 0.1KPa, the deep vacuum time is more than or equal to 15min, a 150-meter calcium wire is fed into molten steel every 100t after VD, the VD is vacuumized and then is put on a continuous casting table for continuous casting production, the water quantity of a continuous casting crystallizer is 2200L/min, the secondary cooling specific water quantity is 0.20L/kg, and the pulling speed is 0.4 m/min;
the heat treatment process comprises the following steps: quenching and tempering; the quenching temperature is 860 +/-10 ℃, and the heat is preserved for 3-4 h; the tempering temperature is 490 +/-5 ℃, and the temperature is kept for 1-1.5 h.
Compared with the prior art, the invention has the beneficial technical effects that:
1. the invention relates to a continuous casting round tube blank for a railway vehicle hub containing rare earth, which has better toughness through the modification and microalloying of the rare earth.
2. The continuous casting round tube blank for the rare earth-containing railway vehicle hub has good comprehensive mechanical properties such as high strength, high hardness, good wear resistance and the like.
Detailed Description
A method for preparing a continuous casting round tube blank for a rare earth-containing railway vehicle hub comprises the following steel-making production processes: molten iron pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting. The converter smelting adopts desulfurized molten iron, a single slag smelting process is adopted, the final slag alkalinity is more than or equal to 3.0, and aluminum deoxidation is adopted for final deoxidation, so that the gas content, particularly the oxygen content, in steel can be effectively reduced; keeping bottom argon blowing in the whole process of LF refining, heating and raising the temperature in a mode of gradually raising the temperature from low level to high level, carrying out component fine adjustment according to the steel coming from a converter, and adding 40kg of rare earth alloy before VD after LF; VD deep vacuum degree is less than or equal to 0.1Kpa, deep vacuum time is more than or equal to 15min, 150m calcium wire is fed after VD vacuum, soft blowing time is guaranteed for more than 15min after wire feeding, and the content of inclusions in steel is reduced; the continuous casting process adopts non-oxidation protection pouring, the superheat degree of molten steel is controlled within 30 ℃, a constant drawing speed control process is adopted, the starting drawing speed is 0.2m/s, the transverse constant drawing speed is controlled at 0.4m/min, and the quality of continuous casting billets can be improved.
The chemical compositions of the examples were measured and are shown in table 1.
Table 1 chemical composition percentages (%)
The heat treatment process of the steel pipe comprises the following steps: and (6) quenching and tempering. The quenching temperature is 860 +/-10 ℃, and the heat preservation is carried out for 3-4 h, wherein the temperature can ensure that all alloy elements are dissolved in austenite, and crystal grains are not too coarse; the tempering temperature is 490 +/-5 ℃, the heat preservation time is 1-1.5 h, and the tempered material has good obdurability matching at the tempering temperature.
The chemical components of the continuous casting round tube blank for the rare earth-containing railway vehicle hub produced in the process are 0.50-0.60 mass percent of C, 0.10-0.40 mass percent of Si, 0.70-0.90 mass percent of Mn, 0.10-0.30 mass percent of Cr, 0.05-0.20 mass percent of Mo, 0.02-0.05 mass percent of V, less than or equal to 0.015 mass percent of P, less than or equal to 0.010 mass percent of S and 0.002-0.006 mass percent of RE, the strength, the hardness and the wear resistance of steel are improved through the strengthening effect of C and Mn in medium carbon manganese steel, and meanwhile, the toughness of the material is improved by utilizing the microalloying and metamorphic function of rare earth elements, so that the material has good comprehensive mechanical properties and meets the service requirements of the railway vehicle hub steel.
The mechanical property test results of each example are shown in table 2.
TABLE 2 mechanical Property test results of the examples
As can be seen from Table 2, the continuous casting round tube blank material for the railway vehicle hub has good mechanical properties, particularly high material strength, hardness and wear resistance and good toughness.
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 (7)
1. The continuous casting round pipe blank for the rare earth-containing railway vehicle hub is characterized by comprising the following chemical components in percentage by mass: 0.50-0.60% of C, 0.10-0.40% of Si, 0.70-0.90% of Mn, 0.10-0.30% of Cr, 0.05-0.20% of Mo, 0.02-0.05% of V, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.002-0.006% of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100%.
2. The continuous casting round pipe blank containing the rare earth for the railway vehicle hub according to claim 1, wherein the material comprises the following chemical components in percentage by mass: 0.50% of C, 0.10% of Si, 0.70% of Mn, 0.10% of Cr, 0.05% of Mo, 0.02% of V, 0.015% of P, 0.010% of S and 0.002% of RE, and the balance of Fe and inevitable impurities, wherein the mass fraction accounts for 100%.
3. The continuous casting round pipe blank containing the rare earth for the railway vehicle hub according to claim 1, wherein the material comprises the following chemical components in percentage by mass: 0.55 percent of C, 0.28 percent of Si, 0.80 percent of Mn, 0.20 percent of Cr, 0.12 percent of Mo, 0.036 percent of V, 0.013 percent of P, 0.008 percent of S and 0.004 percent of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100 percent.
4. The continuous casting round pipe blank containing the rare earth for the railway vehicle hub according to claim 1, wherein the material comprises the following chemical components in percentage by mass: 0.58 percent of C, 0.35 percent of Si, 0.85 percent of Mn, 0.25 percent of Cr, 0.16 percent of Mo, 0.42 percent of V, 0.012 percent of P, 0.007 percent of S, 0.005 percent of RE and the balance of Fe and trace impurities, wherein the mass fraction is 100 percent.
5. The continuous casting round pipe blank containing the rare earth for the railway vehicle hub according to claim 1, wherein the material comprises the following chemical components in percentage by mass: 0.52% of C, 0.15% of Si, 0.75% of Mn, 0.15% of Cr, 0.08% of Mo, 0.028% of V, 0.014% of P, 0.009% of S and 0.003% of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100%.
6. The continuous casting round pipe blank for the rare earth-containing railway vehicle hub according to claim 1, wherein the continuous casting round pipe blank for the rare earth-containing railway vehicle hub comprises the following chemical components in percentage by mass: 0.60 percent of C, 0.40 percent of Si, 0.90 percent of Mn, 0.30 percent of Cr, 0.20 percent of Mo, 0.05 percent of V, 0.010 percent of P, 0.005 percent of S and 0.006 percent of RE, and the balance of Fe and trace impurities, wherein the mass fraction is 100 percent.
7. The method for preparing the continuous casting round pipe blank for the rare earth-containing railway vehicle hub according to any one of claims 1 to 6, wherein the steel-making production process comprises the following steps: molten iron pretreatment → converter smelting → LF refining → VD degassing → round billet continuous casting; wherein:
the converter smelting adopts desulfurized molten iron, the content of slag (FeO) at the smelting end point is reduced, the slag discharge amount of converter tapping is reduced, LF is desulfurized and the components are finely adjusted, 40kg of rare earth alloy is added into molten steel every 100t after LF and before VD, the VD vacuum degree is less than or equal to 0.1KPa, the deep vacuum time is more than or equal to 15min, a 150-meter calcium wire is fed into molten steel every 100t after VD, the VD is vacuumized and then is put on a continuous casting table for continuous casting production, the water quantity of a continuous casting crystallizer is 2200L/min, the secondary cooling specific water quantity is 0.20L/kg, and the pulling speed is 0.4 m/min;
the heat treatment process comprises the following steps: quenching and tempering; the quenching temperature is 860 +/-10 ℃, and the temperature is kept for 3-4 h; the tempering temperature is 490 +/-5 ℃, and the temperature is kept for 1-1.5 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210178110.1A CN114622136A (en) | 2022-02-25 | 2022-02-25 | Continuous casting round tube blank for rare earth-containing railway vehicle hub and preparation method thereof |
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| CN202210178110.1A CN114622136A (en) | 2022-02-25 | 2022-02-25 | Continuous casting round tube blank for rare earth-containing railway vehicle hub and preparation method thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006291252A (en) * | 2005-04-07 | 2006-10-26 | Nisshin Steel Co Ltd | Material steel plate with excellent fatigue characteristic for quenched-and-tempered steel tube, and steel tube |
| CN102899573A (en) * | 2011-07-25 | 2013-01-30 | 宝山钢铁股份有限公司 | Steel and manufacturing method for high strength wear resistance casing |
| JP2018012855A (en) * | 2016-07-20 | 2018-01-25 | 新日鐵住金株式会社 | Low alloy steel material, low alloy steel tube and container and method for producing the container |
| CN108138283A (en) * | 2015-12-21 | 2018-06-08 | 新日铁住金株式会社 | Roll state K55 electric welding oil well pipes and hot rolled steel plate |
| CN110004357A (en) * | 2019-03-28 | 2019-07-12 | 包头钢铁（集团）有限责任公司 | One kind shale gas seamless steel pipe of high-ductility containing rare earth high-strength and preparation method thereof |
| WO2021078255A1 (en) * | 2019-10-24 | 2021-04-29 | 宝山钢铁股份有限公司 | Anti-collapse petroleum casing pipe and manufacturing method therefor |
| CN113862556A (en) * | 2021-08-05 | 2021-12-31 | 邯郸新兴特种管材有限公司 | 4140 medium-thick-wall seamless steel pipe and production method thereof |
-
2022
- 2022-02-25 CN CN202210178110.1A patent/CN114622136A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006291252A (en) * | 2005-04-07 | 2006-10-26 | Nisshin Steel Co Ltd | Material steel plate with excellent fatigue characteristic for quenched-and-tempered steel tube, and steel tube |
| CN102899573A (en) * | 2011-07-25 | 2013-01-30 | 宝山钢铁股份有限公司 | Steel and manufacturing method for high strength wear resistance casing |
| CN108138283A (en) * | 2015-12-21 | 2018-06-08 | 新日铁住金株式会社 | Roll state K55 electric welding oil well pipes and hot rolled steel plate |
| JP2018012855A (en) * | 2016-07-20 | 2018-01-25 | 新日鐵住金株式会社 | Low alloy steel material, low alloy steel tube and container and method for producing the container |
| CN110004357A (en) * | 2019-03-28 | 2019-07-12 | 包头钢铁（集团）有限责任公司 | One kind shale gas seamless steel pipe of high-ductility containing rare earth high-strength and preparation method thereof |
| WO2021078255A1 (en) * | 2019-10-24 | 2021-04-29 | 宝山钢铁股份有限公司 | Anti-collapse petroleum casing pipe and manufacturing method therefor |
| CN113862556A (en) * | 2021-08-05 | 2021-12-31 | 邯郸新兴特种管材有限公司 | 4140 medium-thick-wall seamless steel pipe and production method thereof |
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