CN111500924A - High-strength wheel steel and production method thereof - Google Patents
High-strength wheel steel and production method thereof Download PDFInfo
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
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- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
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- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
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- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- 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
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
The invention relates to high-strength wheel steel and a production method thereof, wherein the high-strength wheel steel comprises the following components in percentage by weight: 0.05-0.12%, Si: 0.01 to 0.25%, Mn: 1.50-2.00%, P is less than or equal to 0.015%, S is less than or equal to 0.006%, Nb: 0.03-0.09%, Ti: 0.015-0.080%, Mo is less than or equal to 0.30%, Cu is less than or equal to 0.30%, Ni is less than or equal to 0.30%, Cr is less than or equal to 0.30%, and the balance of Fe and inevitable impurities, and the method mainly comprises the following steps: smelting, refining, slab continuous casting, slab heating, rough rolling, finish rolling, cooling, coiling and acid pickling; the purposes of grain refinement and precipitation strengthening are realized by controlling specific process parameters in each process, so that the steel plate with high strength, high plasticity, excellent welding performance and excellent forming performance is obtained.
Description
Technical Field
The invention relates to the field of low alloy steel, in particular to high-strength wheel steel and a production method thereof.
Background
In this new and more advanced age, people pursue speed and quality, automobiles gradually become a necessary transportation tool for most families, change the rhythm of our lives, and influence the work and rest of our lives. The steel material has good plasticity, strength and weldability, and is high in yield, low in price and high in cost performance, and is a vital material in automobile production. With the progress of society and the development of science and technology, the requirement of light weight of automobiles is continuously improved, the strength grade of wheel steel is continuously improved from 380MPa, 420MPa, 480MPa and 590MPa, and the welding performance and the forming performance of the wheel steel cannot be reduced while the strength grade is improved, so that higher requirements are provided for the high-strength steel for the wheels of the automobiles.
The national patent CN101285156A applied and published on No. 06, 05 of 2008 records a 700 MPa-level composite reinforced bainite steel and a preparation method thereof, the method adopts a thin slab continuous casting and rolling process to prepare the steel, and the content of chemical components Ti is 0.10-0.14%, which is obviously different from the steel.
The national patent CN101525717B published in the application of No. 04/21 of 2009 describes 700MPa Ti microalloyed ultrafine grained steel and a production method thereof, which mainly relates to a production technology of weather-resistant steel, wherein the chemical component Ti content of the steel is 0.10-0.14%, and the steel is obviously different from the steel.
The national patent CN101538681A applied and published on 6.05.2009 describes a method for producing high-strength steel with yield strength of 700MPa grade, which adopts a thin slab continuous casting and rolling process, wherein the yield strength range is 690-760MPa, and the content of chemical element Ti is 0.10-0.15%, which is obviously different from the method.
In 21.09.2017, published national patent CN109536846A, a high-toughness hot-rolled steel plate with yield strength of 700MPa and a preparation method thereof are described, and a production method of high-strength steel with yield strength of more than or equal to 700MPa is described.
11/16/2017, published national patent CN108048734A, which describes a hot-rolled dual-phase steel with a tensile strength of 700MPa, which is added with rare earth element RE, and adopts a three-stage cooling process, which is obviously different from the process.
In 2018, 4, 17, the published national patent CN108396225A, a 700 MPa-grade titanium-containing hot-rolled dual-phase steel plate and a manufacturing method thereof are described, wherein the Si content is 0.80-1.20%, and the yield strength range is obviously different from that of the steel plate.
High-strength wheel steel is required to have high strength, toughness and plasticity, high fatigue resistance, and good formability and weldability. Wheel spokes are typically formed by spinning or stamping wheel steel; the rim of the wheel is generally formed by welding steel plates, and needs to be rolled after welding, so that the wheel is required to have high forming performance. The low elongation may cause cracks during rolling, thereby affecting the use of users. In the production of steel sheets, the heating temperature, rolling speed, coiling temperature, cooling speed, and the like are important for controlling the structural properties of the steel sheets.
Disclosure of Invention
The invention aims to provide high-strength wheel steel and a production method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows: the high-strength wheel steel comprises the following components in percentage by weight: 0.05-0.12%, Si: 0.01 to 0.25%, Mn: 1.50-2.00%, P is less than or equal to 0.015%, S is less than or equal to 0.006%, Nb: 0.03-0.09%, Ti: 0.015-0.080%, Mo is less than or equal to 0.30%, Cu is less than or equal to 0.30%, Ni is less than or equal to 0.30%, Cr is less than or equal to 0.30%, and the balance of Fe and inevitable impurities.
Specifically, the thickness of the steel coil of the wheel steel is 2-16 mm.
Specifically, the yield strength of the wheel steel is more than or equal to 500MPa, the tensile strength is 650-780MPa, and the elongation is more than or equal to 19%.
A production method of high-strength wheel steel comprises the following steps: smelting, refining, slab continuous casting, slab heating, rough rolling, finish rolling, cooling, coiling and acid pickling;
in the smelting process, the components at the end point of converter smelting are strictly controlled to be less than or equal to 0.06 percent of C element, less than or equal to 0.010 percent of P element, less than or equal to 0.015 percent of S element, the end point temperature of 1630-1690 ℃, and the treatment period of L F is more than or equal to 15 min;
a refining process, wherein the RH refining vacuum degree is less than or equal to 133Pa, and the pressure maintaining time is more than or equal to 10 min;
a slab continuous casting process, wherein the low-power quality of a casting blank meets the requirements that the class C is less than or equal to 1.5, the center porosity is less than or equal to 0.5, and the slow cooling is more than 48 hours after the slab continuous casting;
a slab heating procedure, wherein the slab temperature is heated to 1190-;
rough rolling procedure, wherein the last outlet temperature of the rough rolling is 1040-.
A finish rolling procedure, wherein the outlet temperature of finish rolling is 820-880 ℃;
a cooling procedure, wherein the cooling rate is 15-50 ℃/s;
a coiling procedure, wherein the coiling temperature is 500-650 ℃;
acid washing process, wherein the temperature of the acid liquor is 60-90 ℃.
Specifically, the production method further comprises a rough descaling process and a width fixing process.
The invention has the following beneficial effects: the purposes of grain refinement and precipitation strengthening are realized by controlling specific process parameters in each process, so that the steel plate with high strength, high plasticity, excellent welding performance and excellent forming performance is obtained.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings.
The high-strength wheel steel comprises the following chemical components: c: 0.05-0.12%, Si: 0.01 to 0.25%, Mn: 1.50-2.00%, P is less than or equal to 0.015%, S is less than or equal to 0.006%, Nb: 0.03-0.09%, Ti: 0.015-0.080%, Mo is less than or equal to 0.30%, Cu is less than or equal to 0.30%, Ni is less than or equal to 0.30%, Cr is less than or equal to 0.30%, and the balance of Fe and inevitable impurities; wherein the thickness of the wheel steel coil is 2-16mm, the yield strength of the wheel steel is more than or equal to 500MPa, the tensile strength is 650-780MPa, and the elongation is more than or equal to 19%.
Referring to fig. 1, a method for producing high-strength wheel steel includes the following steps: the method comprises the following steps of smelting, refining, slab continuous casting, slab heating, rough descaling, width fixing, rough rolling, finish rolling, cooling, coiling, acid pickling and the like.
In the smelting process, the end point components of converter smelting are strictly controlled to be less than or equal to 0.06 percent of C element, less than or equal to 0.010 percent of P element, less than or equal to 0.015 percent of S element, the end point temperature of 1630-1690 ℃, the tapping time is more than or equal to 4min, the arrival temperature of L F smelted molten steel is more than or equal to 1560 ℃, and the processing period of L F is more than or equal to 15 min;
in the refining process, the RH refining vacuum degree is less than or equal to 133Pa, and the pressure maintaining time is more than or equal to 10 min;
in the slab continuous casting process, the low-power quality of a casting blank meets the requirements that the class C is less than or equal to 1.5, the center porosity is less than or equal to 0.5, no intermediate cracks and no surface defects exist, and the slow cooling is more than 48 hours after the slab is continuously cast;
in the slab heating procedure, the heating temperature is 1190-;
in the rough dephosphorization procedure, hot-rolling high-pressure water descaling is strictly performed;
in the width fixing process, the width control of the width fixing press machine is adjusted on site according to the width of the plate blank and the width of a finished product;
the temperature of the last secondary outlet in the rough rolling procedure is 1040-1100 ℃;
in the finish rolling procedure, the finish rolling outlet temperature is 820-;
in the cooling process, an ultra-fast cooling speed is adopted, and the cooling rate is 15-50 ℃/s.
In the coiling procedure, the coiling temperature is 500-650 ℃;
in the acid washing process, the temperature of the acid liquor is 60-90 ℃; the temperature of rinsing water is 50-80 ℃; the drying temperature is more than or equal to 100 ℃.
The main alloy elements in the invention have the following functions and mechanisms:
carbon: the steel has the function of solid solution strengthening in steel, the strengthening effect is obvious, the price is low, but the performance such as toughness, weldability and the like is reduced due to the over high carbon content.
Silicon: plays roles of deoxidation and strengthening in steel, can influence the surface quality and the galvanizing effect of the steel, and simultaneously reduces the weldability of the steel.
Manganese: the austenitizing element can effectively enlarge an austenite phase region, and can also improve the binding force among crystal grains and improve the strength and toughness of the material. Manganese also plays a role in solid solution strengthening in steel to form a solid solution, so that the hardness and strength of ferrite and austenite in the steel are improved; in steel, lowering the critical transformation temperature can refine pearlite and indirectly increase the strength of pearlite steel.
Niobium: the main microalloy strengthening elements can delay austenite grain recrystallization through the actions of solid solution strengthening, phase transformation strengthening, precipitation strengthening and the like, and reduce the phase transformation temperature. Niobium has strong affinity with carbon and nitrogen atoms, and can form fine dispersed carbonitride, thereby playing a role in fine grain strengthening, obviously improving the strength of steel, and niobium is not a crack sensitive coefficient element and basically has no influence on welding.
Aluminum: ferrite elements and aluminum elements are light in weight, and the density is obviously reduced by adding Al elements into steel. The aluminum element can refine crystal grains, and a small amount of aluminum element is added, so that the impact toughness is improved. The aluminum element also has corrosion resistance and oxidation resistance, and the aluminum and the silicon are combined, so that the high-temperature corrosion resistance of the steel can be obviously improved, the iron scale is reduced, and the steel cannot peel at high temperature. Meanwhile, the aluminum element is also a main deoxidizer, which is beneficial to reducing the oxygen content in the steel.
Titanium: in austenite, titanium nitride particles inhibit austenite recrystallization and grain growth, but when the temperature reaches above 1400 ℃, titanium nitride begins to coarsen and even dissolve. Ti can simultaneously improve the low-temperature toughness of the base metal and the welding heat affected zone, the formed TiN can effectively fix nitrogen, and when the Al content is lower than 0.005 percent, Ti can form a nitride to refine the microstructure of the heat affected zone.
Oxygen, nitrogen, sulfur, phosphorus: the elements are strictly controlled, which are adverse to hot coil structure and performance and seriously affect the burst rate and the microcrack rate of the wheel steel.
The process design idea of the invention is as follows: the purposes of grain refinement and precipitation strengthening are realized by controlling specific process parameters in each step. The rolling process comprises the following steps: the controlled rolling and controlled cooling technology is adopted, deformation and heat treatment are combined, expected structures and refined grains are obtained, and the mechanical property and the cold bending forming property of the material are improved. And (3) a cooling process: the ultra-fast cooling technology (inclined jet cooling) is adopted, firstly, the new water can effectively form an air film between the steel plate and the water, and jet impact and nuclear boiling are realized; and secondly, the residual water forms ordered wall surface jet flow, so that excessive boiling of the film state is reduced. The core technology is high-strength uniform cooling of the high-temperature steel plate.
The chemical components designed by the wheel steel, main elements such as C, Mn and Si, trace elements such as Ni and Ti and the selection of the rolling temperature have great influence on the precipitation strengthening and the fine grain strengthening of the material. If the rolling temperature is so high that the material is in an unrecrystallized state or an incomplete recrystallized state during rolling, the grain refinement is not enough, even mixed crystals are generated, and the forming performance is affected, and in view of the above, the outlet temperature of the finish rolling is controlled at 870 ℃ of 820-.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the wheel steel produced by the invention is strengthened by adopting niobium and titanium, the Mn content is reduced, the wheel steel is used for manufacturing the wheel steel, a new process flow is adopted, and the wheel steel with good performances is obtained by the technologies of controlled rolling, controlled cooling, rapid cooling and the like, and the industrial production is realized; the thickness of the steel coil is 2-16mm, the yield strength is more than or equal to 500MPa, the tensile strength is 650-780MPa, and the elongation is more than or equal to 19%.
Example 1
The specific composition of the 4.6mm high strength wheel steel of this example is shown in Table 1.
TABLE 14.6 mm high-strength wheel steels chemical composition
The high-strength wheel steel and the production method of the embodiment are as follows:
KR desulfurization, smelting, L F refining, RH refining, slab continuous casting, slab inspection, slab heating, rough descaling, rough rolling, finish rolling, laminar cooling, quick cooling, coiling, acid pickling, leveling, inspection, packaging and warehousing.
In the smelting process, the end point components of converter smelting are strictly controlled to be less than or equal to 0.06 percent of C element, less than or equal to 0.010 percent of P element and less than or equal to 0.015 percent of S element, the purity and the uniformity of steel are ensured, the tapping time is 5min, the arrival temperature is 1565 ℃, and the processing period of L F is 20 min.
In the refining process, the RH vacuum degree is 120Pa, and the pressure maintaining time is 12 min; .
In the slab continuous casting process, the casting blank has low-power quality C class of 1.0 grade, the center is loose by 0.5, and the slab is slowly cooled for 48 hours after continuous casting.
Heating the qualified plate blank to 1210 ℃, carrying out rough rolling for 6 times, carrying out finish rolling for 7 times, wherein the outlet temperature is 870 ℃, the curling temperature is 550 ℃ and the acid pickling temperature is 80 ℃. The qualified wheel steel with the thickness of 4.6mm, the yield strength of 690MPa, the tensile strength of 760MPa and the elongation of 21 percent is obtained.
Example 2
Specific compositions of the 5.5mm high strength wheel steels are shown in table 2.
TABLE 25.2 mm high-Strength wheel Steel chemical composition
The high-strength wheel steel and the production and preparation method of the embodiment are as follows:
KR desulfurization, smelting, L F refining, RH refining, slab continuous casting, slab inspection, slab heating, rough descaling, rough rolling, finish rolling, laminar cooling, quick cooling, coiling, acid pickling, leveling, inspection, packaging and warehousing.
In the smelting process, the end point components of converter smelting are strictly controlled to be less than or equal to 0.06 percent of C element, less than or equal to 0.010 percent of P element and less than or equal to 0.015 percent of S element, the purity and the uniformity of steel are ensured, the tapping time is 5min, the arrival temperature is 1568 ℃, and the processing period of L F is 22 min.
In the refining process, the RH vacuum degree is 125Pa, and the pressure maintaining time is 15 min; .
In the slab continuous casting process, the casting blank has low-power quality C class of 1.0 grade, the center is loose by 0.5, and the slab is slowly cooled for 48 hours after continuous casting.
Heating the qualified plate blank to 1220 ℃, carrying out rough rolling for 6 times, carrying out finish rolling for 7 times, wherein the outlet temperature is 1060 ℃, the curling temperature is 520 ℃, and the acid washing temperature is 80 ℃. The qualified wheel steel with the thickness of 5.2mm, the yield strength of 660MPa, the tensile strength of 740MPa and the elongation of 20 percent is obtained.
Example 3
The specific composition of the 11mm high strength wheel steel of this example is shown in Table 3.
TABLE 34.6 mm high-strength wheel steel chemical composition
The high-strength wheel steel and the production and preparation method of the embodiment are as follows:
KR desulfurization, smelting, L F refining, RH refining, slab continuous casting, slab inspection, slab heating, rough descaling, rough rolling, finish rolling, laminar cooling, quick cooling, coiling, acid pickling, leveling, inspection, packaging and warehousing.
In the smelting process, the end point components of converter smelting are strictly controlled to be less than or equal to 0.06 percent of C element, less than or equal to 0.010 percent of P element and less than or equal to 0.015 percent of S element, the purity and the uniformity of steel are ensured, the tapping time is 5min, the arrival temperature is 1570 ℃, and the processing period of L F is 25 min.
In the refining process, the RH vacuum degree is 125Pa, and the dwell time is 15 min.
In the slab continuous casting process, the casting blank has low-power quality C class of 1.0 grade, the center is loose by 0.5, and the slab is slowly cooled for 48 hours after continuous casting.
Heating the qualified plate blank to 1220 ℃, carrying out rough rolling for 6 times, carrying out finish rolling for 7 times, wherein the outlet temperature is 855 ℃, the curling temperature is 500 ℃, and the acid washing temperature is 80 ℃. The qualified high-strength wheel steel with the thickness of 11mm, the yield strength of 630MPa, the tensile strength of 710MPa and the elongation of 22 percent is obtained.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (5)
1. The high-strength wheel steel is characterized by comprising the following components in percentage by weight: 0.05-0.12%, Si: 0.01 to 0.25%, Mn: 1.50-2.00%, P is less than or equal to 0.015%, S is less than or equal to 0.006%, Nb: 0.03-0.09%, Ti: 0.015-0.080%, Mo is less than or equal to 0.30%, Cu is less than or equal to 0.30%, Ni is less than or equal to 0.30%, Cr is less than or equal to 0.30%, and the balance of Fe and inevitable impurities.
2. The high-strength wheel steel as claimed in claim 1, wherein the steel coil thickness of the wheel steel is 2-16 mm.
3. The wheel steel as claimed in claim 1, wherein the yield strength of the wheel steel is 500MPa or more, the tensile strength is 650-780MPa, and the elongation is 19% or more.
4. A method for producing high strength wheel steel according to any one of claims 1 to 3, comprising the steps of: smelting, refining, slab continuous casting, slab heating, rough rolling, finish rolling, cooling, coiling and acid pickling;
in the smelting process, the components at the end point of converter smelting are strictly controlled to be less than or equal to 0.06 percent of C element, less than or equal to 0.010 percent of P element, less than or equal to 0.015 percent of S element, the end point temperature of 1630-1690 ℃, and the treatment period of L F is more than or equal to 15 min;
a refining process, wherein the RH refining vacuum degree is less than or equal to 133Pa, and the pressure maintaining time is more than or equal to 10 min;
a slab continuous casting process, wherein the low-power quality of a casting blank meets the requirements that the class C is less than or equal to 1.5, the center porosity is less than or equal to 0.5, and the slow cooling is more than 48 hours after the slab continuous casting;
a slab heating procedure, wherein the slab temperature is heated to 1190-;
rough rolling procedure, wherein the last outlet temperature of the rough rolling is 1040-.
A finish rolling procedure, wherein the outlet temperature of finish rolling is 820-880 ℃;
a cooling procedure, wherein the cooling rate is 15-50 ℃/s;
a coiling procedure, wherein the coiling temperature is 500-650 ℃;
acid washing process, wherein the temperature of the acid liquor is 60-90 ℃.
5. The method for producing a high-strength wheel steel as claimed in claim 4, wherein the method further comprises a rough descaling process and a sizing process.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112157135A (en) * | 2020-09-07 | 2021-01-01 | 山东钢铁集团日照有限公司 | Production method of economical cold-rolled steel plate for water heater water tank outer plate |
| CN112281051A (en) * | 2020-09-07 | 2021-01-29 | 日照钢铁控股集团有限公司 | 690 MPa-grade hot-rolled wheel steel with thickness of more than 10mm and manufacturing method thereof |
| CN112301275A (en) * | 2020-09-30 | 2021-02-02 | 首钢集团有限公司 | 500 MPa-grade high-strength steel and preparation method thereof |
| CN112410671A (en) * | 2020-11-18 | 2021-02-26 | 山东钢铁集团日照有限公司 | Production method for producing steel for rim by adopting complex phase structure |
| CN112501517A (en) * | 2020-11-30 | 2021-03-16 | 攀钢集团攀枝花钢铁研究院有限公司 | 540 MPa-grade thick-specification steel for automobile spokes and preparation method thereof |
| CN112626421A (en) * | 2020-11-30 | 2021-04-09 | 攀钢集团攀枝花钢铁研究院有限公司 | 650 MPa-grade steel for automobile wheels and preparation method thereof |
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| CN114635079A (en) * | 2022-01-29 | 2022-06-17 | 安阳钢铁股份有限公司 | 650MPa lightweight high-strength steel for rim and production method thereof |
| CN114875333A (en) * | 2022-05-31 | 2022-08-09 | 本钢板材股份有限公司 | Manufacturing method of 650 MPa-grade steel for commercial vehicle rim |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112157135A (en) * | 2020-09-07 | 2021-01-01 | 山东钢铁集团日照有限公司 | Production method of economical cold-rolled steel plate for water heater water tank outer plate |
| CN112281051A (en) * | 2020-09-07 | 2021-01-29 | 日照钢铁控股集团有限公司 | 690 MPa-grade hot-rolled wheel steel with thickness of more than 10mm and manufacturing method thereof |
| CN112301275A (en) * | 2020-09-30 | 2021-02-02 | 首钢集团有限公司 | 500 MPa-grade high-strength steel and preparation method thereof |
| CN112301275B (en) * | 2020-09-30 | 2022-05-17 | 首钢集团有限公司 | 500 MPa-grade high-strength steel and preparation method thereof |
| CN112410671A (en) * | 2020-11-18 | 2021-02-26 | 山东钢铁集团日照有限公司 | Production method for producing steel for rim by adopting complex phase structure |
| CN112501517A (en) * | 2020-11-30 | 2021-03-16 | 攀钢集团攀枝花钢铁研究院有限公司 | 540 MPa-grade thick-specification steel for automobile spokes and preparation method thereof |
| CN112626421A (en) * | 2020-11-30 | 2021-04-09 | 攀钢集团攀枝花钢铁研究院有限公司 | 650 MPa-grade steel for automobile wheels and preparation method thereof |
| CN113957359A (en) * | 2021-10-28 | 2022-01-21 | 攀钢集团攀枝花钢铁研究院有限公司 | High-strength steel for automobile wheels and preparation method thereof |
| CN114635079A (en) * | 2022-01-29 | 2022-06-17 | 安阳钢铁股份有限公司 | 650MPa lightweight high-strength steel for rim and production method thereof |
| CN114875333A (en) * | 2022-05-31 | 2022-08-09 | 本钢板材股份有限公司 | Manufacturing method of 650 MPa-grade steel for commercial vehicle rim |
| CN114875333B (en) * | 2022-05-31 | 2023-09-15 | 本钢板材股份有限公司 | Manufacturing method of 650 MPa-level steel for commercial vehicle rim |
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