CN105543646A - Production process for medium-high carbon steel through thin slabs - Google Patents
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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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- 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
- C21D8/02—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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- 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
- C21D8/02—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
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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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
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
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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
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Abstract
The invention discloses a production process for medium-high carbon steel through thin slabs. The medium-high carbon steel comprises, by weight, 0.5%-0.88% of carbon, 0.15%-0.68% of silicon, 0.65%-1.55% of manganese, 0-0.025% of phosphorus, 0.002%-0.0025% of sulfur, 0.09%-0.22% of chromium, 0.08%-0.12% of nickel, 0.02%-0.035% of arsenic, 0.18%-0.20% of copper, 0-0.02% of aluminum and the balance iron. According to the production process for the medium-high carbon steel through the thin slabs, the medium-high carbon steel is produced through the thin slab continuous casting and rolling process, the production requirements are met by controlling process parameters of each procedure, and the problems existing in the background art are solved.
Description
Technical field
The present invention relates to Steel Alloy technical field, be specifically related to a kind of thin slab medium and high carbon steel production technique.
Background technology
At present, the technical process of medium and high carbon steel is: blast-melted-converter-LF refining-conventional plate blank continuous casting-heating-rolling-cool-batch-finished product.Because medium and high carbon steel carbon content is high, resolidified region is strengthened, and steel billet is in process of setting, and easily produce center segregation and center porosity, after rolling into material, coiled sheet centre easily occurs demixing phenomenon; Secondly, strand structural stress and thermal stresses when solidifying is all comparatively large, and high temperature thermoplasticity is lower, easily produces crack of billet and surface crack; In addition, the zero pour of medium and high carbon steel is on the low side, and crystallizer hot melt quantity is less than normal, and conventional plate blank pulling speed of continuous casting is low, and crystallizer molten steel surface is inactive, and covering slag thaw condition is bad, and the defect such as slag inclusion and pipe easily appears in casting billet surface.For improving this type of defect, conventional plate blank is produced medium and high carbon steel and is equipped with electromagnetic stirring equipment in continuous casting two cold section, and secondary cooling zone takes weak cold mode.And the object of CSP is exactly reduce the thickness that continuous caster exports strand to greatest extent, to reduce tandem mill frame quantity to greatest extent, realize producing hot rolled strip with the shortest technological process of production, obtain Low investment, low cost, the allegro mode of production and economic benefit.Thin plate blank continuously casting and continuously rolling technology apply the exploitation having benefited from following basic technology: the integrated design of crystallizer and submerged nozzle; The control of crystallizer molten steel surface; The exploitation of crystallizer protecting residue; Hydraulic vibrating system; Secondary cooling system.The particularly development and application of liquid core Reduction Technology, not only solves the matching problem of continuous casting and steel rolling, and significantly improves center segregation of casting blank and center porosity, to produce the strand meeting steel rolling requirement.
Summary of the invention
For solving the problem, the invention provides a kind of thin slab medium and high carbon steel production technique.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of thin slab medium and high carbon steel production technique, comprises and being prepared from by the chemical composition of following weight percent:
Carbon 0.5 ~ 0.88%, silicon 0.15 ~ 0.68%, manganese 0.65 ~ 1.55%, phosphorus≤0.025%, sulphur 0.002 ~ 0.0025%, chromium 0.09 ~ 0.22%, nickel 0.08 ~ 0.12%, arsenic 0.02 ~ 0.035%, copper 0.18 ~ 0.20%, aluminium≤0.02% and surplus are iron.
Further, comprise the steps:
S1, take that chemical composition is carbon 0.5 ~ 0.88%, silicon 0.15 ~ 0.68%, manganese 0.65 ~ 1.55%, phosphorus≤0.025%, sulphur 0.002 ~ 0.0025%, chromium 0.09 ~ 0.22%, nickel 0.08 ~ 0.12%, arsenic 0.02 ~ 0.035%, copper 0.18 ~ 0.20%, aluminium≤0.02% and surplus are iron, adopt desulphurised hot metal to carry out pre-desulfurization operations, obtain material;
S2, desulfurization pre-in step S1 obtained material and drop in vacuum metling converter and smelt, obtain steel alloy blank;
S3, the steel alloy blank obtained placed on continuous caster carry out continuous casting operation in step S2, obtain steel alloy section bar;
S4, by the steel alloy section bar of step S3 gained after Overheating Treatment, carry out cutting operation, obtain steel alloy crude product;
S5, by step S4 gained cutting after steel alloy crude product heat send in roller mill, carry out hot rolling and meticulous hot-rolled manipulation, obtain thin slab medium and high carbon steel finished product;
S6, by after the annealed process of thin slab medium and high carbon steel finished product of step S5 gained, be cooled to room temperature, by inspection, packaging warehouse-in.
Further, in described step S2, molten steel control composition is C >=0.10%, S≤0.030%, P≤0.015%; Smelting temperature 1630 ~ 1650 DEG C, smelting time is 2 ~ 4 hours, and smelting furnace operating pressure is 0.80 ~ 0.85MPa.
Further, in described step S3, Continuous Cast Molten Steel Temperature is 15 ~ 30 DEG C, in continuous casting working procedure, and cooling twice adopts the strong type of cooling.
Further, in described step S5, just hot-rolled temperature is 1000 DEG C ~ 1200 DEG C, and the time is 1 ~ 2h, and meticulous hot-rolled temperature is 600 DEG C ~ 800 DEG C, and the time is 0.5 ~ 1h.
Further, described step S4 anneal temperature is 500 ~ 650 DEG C, and then air cooling is to room temperature, annealing time 1 hour.
The chemical composition effect of each weight percent in high-intensity high-tenacity steel alloy:
Carbon (C): in steel, carbon content increases, yield-point and tensile strength raise, but plasticity and impact reduce, and when carbon content is more than 0.23%, the welding property of steel degenerates, and the structural low alloy steel therefore for welding, carbon content is generally no more than 0.20%.Carbon amounts height also can reduce the atmospheric corrosion resistance ability of steel, and the high carbon steel in stock ground is with regard to easy-to-rust in the open; In addition, carbon can increase cold shortness and the aging sensitivity of steel.
Silicon (Si): add silicon as reductive agent and reductor in steelmaking process, so killed steel contains the silicon of 0.15-0.30%.If silicon content is more than 0.50-0.60% in steel, even if silicon alloying element.Silicon can significantly improve the elastic limit of steel, yield-point and tensile strength, therefore is widely used in and makes spring steel.In modified structure iron, add the silicon of 1.0-1.2%, intensity can improve 15-20%.The combinations such as silicon and molybdenum, tungsten, chromium, are improved erosion resistance and oxidation resistant effect, can manufacture high temperature steel.The soft steel of siliceous 1-4%, has high permeability, does silieonized plate for electrical equipment industry.Silicon amount increases, and can reduce the welding property of steel.
Manganese (Mn): in steelmaking process, manganese is good reductor and sweetening agent, containing manganese 0.30-0.50% in general steel.Even if when adding more than 0.70% in carbon steel " manganese steel ", the steel of more general steel amount not only has enough toughness, and has higher intensity and hardness, improves the quenching property of steel, improves the hot workability of steel, as higher than A3 yield-point in 16Mn steel by 40%.Steel containing manganese 11-14% has high wear resistance, for shovel bucket, and ball grinding machine lining board etc.Manganese amount increases, and weakens the resistance to corrosion of steel, reduces welding property.
Phosphorus (P): in the ordinary course of things, phosphorus is harmful element in steel, increases the cold shortness of steel, welding property is degenerated, and reduces plasticity, cold-bending property is degenerated.Therefore usually require that in steel, phosphorus content is less than 0.045%, high-quality steel requires some more low.
Sulphur (S): sulphur is also harmful element under normal conditions.Make steel produce red brittleness, reduce ductility and the toughness of steel, cause crackle when forging and rolling.Sulphur is also unfavorable to welding property, reduces erosion resistance.So usually require that sulphur content is less than 0.055%, high-quality steel requires to be less than 0.040%.In steel, add the sulphur of 0.08-0.20%, can machinability be improved, usually claim free-cutting steel.
Chromium (Cr): in structure iron and tool steel, chromium can significantly improve intensity, hardness and wear resistance, but reduces plasticity and toughness simultaneously.Chromium can improve again oxidation-resistance and the erosion resistance of steel, because of but stainless steel, the important alloying element of high temperature steel.
Nickel (Ni): nickel can improve the intensity of steel, and keep good plasticity and toughness.Nickel has higher corrosion resistance to soda acid, at high temperature has antirust and temperature capacity.But due to the resource that nickel is more rare, therefore other alloying element substitute steel nickel chromes should be adopted as far as possible.
Copper (Cu): the steel that Wuhan Iron and Steel Plant Daye ore refines, often containing copper.Copper can improve intensity and toughness, particularly atomospheric corrosion performance.Shortcoming easily produces hot-short, and copper content significantly reduces more than 0.5% plasticity.When copper content is less than 0.50% to weldability without impact.
Aluminium (Al): aluminium is reductor conventional in steel.A small amount of aluminium is added in steel, can crystal grain thinning, improve impelling strength, as made the 08Al steel of deep drawing sheet.Aluminium also has oxidation-resistance and corrosion resistance, and aluminium and chromium, silicon share, and can significantly improve the high temperature non-scale performance of steel and the ability of high-temperature corrosion resistance.The shortcoming of aluminium affects the hot workability of steel, welding property and machinability.
The present invention is utilizing this technique to complete energy production department's compounding technology standard and is meeting the high carbon steel product of user's requirement, in technique, converter dephosphorization protects carbon, control steel inclusion form and conveying, rational pouring temperature and pulling rate, gas in steel, inclusion content are low, carbon segregation is little, coils flexible bar even, good mechanical properties; Adopt continuous casting and rolling technique of sheet bar to produce medium and high carbon steel, by controlling each procedure technology parameter, producing and meeting the demands, solve the problems referred to above that background technology exists.
Embodiment
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The present invention includes and be prepared from by the raw material of following weight part: be prepared from by the chemical composition of following weight percent:
Carbon 0.5 ~ 0.88%, silicon 0.15 ~ 0.68%, manganese 0.65 ~ 1.55%, phosphorus≤0.025%, sulphur 0.002 ~ 0.0025%, chromium 0.09 ~ 0.22%, nickel 0.08 ~ 0.12%, arsenic 0.02 ~ 0.035%, copper 0.18 ~ 0.20%, aluminium≤0.02% and surplus are iron.
Comprise the steps:
S1, take that chemical composition is carbon 0.5 ~ 0.88%, silicon 0.15 ~ 0.68%, manganese 0.65 ~ 1.55%, phosphorus≤0.025%, sulphur 0.002 ~ 0.0025%, chromium 0.09 ~ 0.22%, nickel 0.08 ~ 0.12%, arsenic 0.02 ~ 0.035%, copper 0.18 ~ 0.20%, aluminium≤0.02% and surplus are iron, adopt desulphurised hot metal to carry out pre-desulfurization operations, obtain material;
S2, desulfurization pre-in step S1 obtained material and drop in vacuum metling converter and smelt, obtain steel alloy blank;
S3, the steel alloy blank obtained placed on continuous caster carry out continuous casting operation in step S2, obtain steel alloy section bar;
S4, by the steel alloy section bar of step S3 gained after Overheating Treatment, carry out cutting operation, obtain steel alloy crude product;
S5, by step S4 gained cutting after steel alloy crude product heat send in roller mill, carry out hot rolling and meticulous hot-rolled manipulation, obtain thin slab medium and high carbon steel finished product;
S6, by after the annealed process of thin slab medium and high carbon steel finished product of step S5 gained, be cooled to room temperature, by inspection, packaging warehouse-in.
In described step S2, molten steel control composition is C >=0.10%, S≤0.030%, P≤0.015%; Smelting temperature 1630 ~ 1650 DEG C, smelting time is 2 ~ 4 hours, and smelting furnace operating pressure is 0.80 ~ 0.85MPa.
In described step S3, Continuous Cast Molten Steel Temperature is 15 ~ 30 DEG C, in continuous casting working procedure, and cooling twice adopts the strong type of cooling.
In described step S5, just hot-rolled temperature is 1000 DEG C ~ 1200 DEG C, and the time is 1 ~ 2h, and meticulous hot-rolled temperature is 600 DEG C ~ 800 DEG C, and the time is 0.5 ~ 1h.
Described step S4 anneal temperature is 500 ~ 650 DEG C, and then air cooling is to room temperature, annealing time 1 hour.
embodiment 1:
S1, take that chemical composition is carbon 0.6%, silicon 0.3%, manganese 0.7%, phosphorus≤0.025%, sulphur 0.0024%, chromium 0.1%, nickel 0.1%, arsenic 0.03%, copper 0.19%, aluminium≤0.02% and surplus are iron, adopt desulphurised hot metal to carry out pre-desulfurization operations, obtain material;
S2, desulfurization pre-in step S1 obtained material and drop in vacuum metling converter and smelt, obtain steel alloy blank;
S3, the steel alloy blank obtained placed on continuous caster carry out continuous casting operation in step S2, obtain steel alloy section bar;
S4, by the steel alloy section bar of step S3 gained after Overheating Treatment, carry out cutting operation, obtain steel alloy crude product;
S5, by step S4 gained cutting after steel alloy crude product heat send in roller mill, carry out hot rolling and meticulous hot-rolled manipulation, obtain thin slab medium and high carbon steel finished product;
S6, by after the annealed process of thin slab medium and high carbon steel finished product of step S5 gained, be cooled to room temperature, by inspection, packaging warehouse-in.
In described step S2, molten steel control composition is C >=0.10%, S≤0.030%, P≤0.015%; Smelting temperature 1640 DEG C, smelting time is 3 hours, and smelting furnace operating pressure is 0.84MPa.
In described step S3, Continuous Cast Molten Steel Temperature is 19 DEG C, in continuous casting working procedure, and cooling twice adopts the strong type of cooling.
In described step S5, just hot-rolled temperature is 1100 DEG C, and the time is 1.5h, and meticulous hot-rolled temperature is 680 DEG C, and the time is 0.9h.
Described step S4 anneal temperature is 550 DEG C, and then air cooling is to room temperature, annealing time 1 hour.
embodiment 2:
S1, take that chemical composition is carbon 0.88%, silicon 0.68%, manganese 1.55%, phosphorus≤0.025%, sulphur 0.002%, chromium 0.22%, nickel 0.12%, arsenic 0.035%, copper 0.20%, aluminium≤0.02% and surplus are iron, adopt desulphurised hot metal to carry out pre-desulfurization operations, obtain material;
S2, desulfurization pre-in step S1 obtained material and drop in vacuum metling converter and smelt, obtain steel alloy blank;
S3, the steel alloy blank obtained placed on continuous caster carry out continuous casting operation in step S2, obtain steel alloy section bar;
S4, by the steel alloy section bar of step S3 gained after Overheating Treatment, carry out cutting operation, obtain steel alloy crude product;
S5, by step S4 gained cutting after steel alloy crude product heat send in roller mill, carry out hot rolling and meticulous hot-rolled manipulation, obtain thin slab medium and high carbon steel finished product;
S6, by after the annealed process of thin slab medium and high carbon steel finished product of step S5 gained, be cooled to room temperature, by inspection, packaging warehouse-in.
In described step S2, molten steel control composition is C >=0.10%, S≤0.030%, P≤0.015%; Smelting temperature 1650 DEG C, smelting time is 4 hours, and smelting furnace operating pressure is 0.85MPa.
In described step S3, Continuous Cast Molten Steel Temperature is 30 DEG C, in continuous casting working procedure, and cooling twice adopts the strong type of cooling.
In described step S5, just hot-rolled temperature is 1200 DEG C, and the time is 2h, and meticulous hot-rolled temperature is 800 DEG C, and the time is 1h.
Described step S4 anneal temperature is 650 DEG C, and then air cooling is to room temperature, annealing time 1 hour.
embodiment 3:
S1, take that chemical composition is carbon 0.5%, silicon 0.15%, manganese 0.65%, phosphorus≤0.025%, sulphur 0.002%, chromium 0.09%, nickel 0.08%, arsenic 0.02%, copper 0.18%, aluminium≤0.02% and surplus are iron, adopt desulphurised hot metal to carry out pre-desulfurization operations, obtain material;
S2, desulfurization pre-in step S1 obtained material and drop in vacuum metling converter and smelt, obtain steel alloy blank;
S3, the steel alloy blank obtained placed on continuous caster carry out continuous casting operation in step S2, obtain steel alloy section bar;
S4, by the steel alloy section bar of step S3 gained after Overheating Treatment, carry out cutting operation, obtain steel alloy crude product;
S5, by step S4 gained cutting after steel alloy crude product heat send in roller mill, carry out hot rolling and meticulous hot-rolled manipulation, obtain thin slab medium and high carbon steel finished product;
S6, by after the annealed process of thin slab medium and high carbon steel finished product of step S5 gained, be cooled to room temperature, by inspection, packaging warehouse-in.
In described step S2, molten steel control composition is C >=0.10%, S≤0.030%, P≤0.015%; Smelting temperature 1630 DEG C, smelting time is 2 hours, and smelting furnace operating pressure is 0.80MPa.
In described step S3, Continuous Cast Molten Steel Temperature is 15 DEG C, in continuous casting working procedure, and cooling twice adopts the strong type of cooling.
In described step S5, just hot-rolled temperature is 1000 DEG C DEG C, and the time is 1h, and meticulous hot-rolled temperature is 600 DEG C, and the time is 0.5h.
Described step S4 anneal temperature is 500 DEG C, and then air cooling is to room temperature, annealing time 1 hour.
The present invention is utilizing this technique to complete energy production department's compounding technology standard and is meeting the high carbon steel product of user's requirement, in technique, converter dephosphorization protects carbon, control steel inclusion form and conveying, rational pouring temperature and pulling rate, gas in steel, inclusion content are low, carbon segregation is little, coils flexible bar even, good mechanical properties; Adopt continuous casting and rolling technique of sheet bar to produce medium and high carbon steel, by controlling each procedure technology parameter, producing and meeting the demands, solve the problems referred to above that background technology exists.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a thin slab medium and high carbon steel production technique, is characterized in that, comprises and being prepared from by the chemical composition of following weight percent:
Carbon 0.5 ~ 0.88%, silicon 0.15 ~ 0.68%, manganese 0.65 ~ 1.55%, phosphorus≤0.025%, sulphur 0.002 ~ 0.0025%, chromium 0.09 ~ 0.22%, nickel 0.08 ~ 0.12%, arsenic 0.02 ~ 0.035%, copper 0.18 ~ 0.20%, aluminium≤0.02% and surplus are iron.
2. a thin slab medium and high carbon steel production technique, is characterized in that, comprises the steps:
S1, take that chemical composition is carbon 0.5 ~ 0.88%, silicon 0.15 ~ 0.68%, manganese 0.65 ~ 1.55%, phosphorus≤0.025%, sulphur 0.002 ~ 0.0025%, chromium 0.09 ~ 0.22%, nickel 0.08 ~ 0.12%, arsenic 0.02 ~ 0.035%, copper 0.18 ~ 0.20%, aluminium≤0.02% and surplus are iron, adopt desulphurised hot metal to carry out pre-desulfurization operations, obtain material;
S2, desulfurization pre-in step S1 obtained material and drop in vacuum metling converter and smelt, obtain steel alloy blank;
S3, the steel alloy blank obtained placed on continuous caster carry out continuous casting operation in step S2, obtain steel alloy section bar;
S4, by the steel alloy section bar of step S3 gained after Overheating Treatment, carry out cutting operation, obtain steel alloy crude product;
S5, by step S4 gained cutting after steel alloy crude product heat send in roller mill, carry out hot rolling and meticulous hot-rolled manipulation, obtain thin slab medium and high carbon steel finished product;
S6, by after the annealed process of thin slab medium and high carbon steel finished product of step S5 gained, be cooled to room temperature, by inspection, packaging warehouse-in.
3. a kind of thin slab medium and high carbon steel production technique according to claim 2, it is characterized in that, in described step S2, molten steel control composition is C >=0.10%, S≤0.030%, P≤0.015%; Smelting temperature 1630 ~ 1650 DEG C, smelting time is 2 ~ 4 hours, and smelting furnace operating pressure is 0.80 ~ 0.85MPa.
4. a kind of thin slab medium and high carbon steel production technique according to claim 2, it is characterized in that, in described step S3, Continuous Cast Molten Steel Temperature is 15 ~ 30 DEG C, in continuous casting working procedure, and cooling twice adopts the strong type of cooling.
5. a kind of thin slab medium and high carbon steel production technique according to claim 2, is characterized in that, in described step S5, just hot-rolled temperature is 1000 DEG C ~ 1200 DEG C, and the time is 1 ~ 2h, and meticulous hot-rolled temperature is 600 DEG C ~ 800 DEG C, and the time is 0.5 ~ 1h.
6. a kind of thin slab medium and high carbon steel production technique according to claim 2, is characterized in that, described step S4 anneal temperature is 500 ~ 650 DEG C, and then air cooling is to room temperature, annealing time 1 hour.
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| CN106563780A (en) * | 2016-10-31 | 2017-04-19 | 山东钢铁股份有限公司 | Continuous casting method for big round billet of medium-high-carbon medium-high-alloy tool steel |
| CN106756507A (en) * | 2016-12-30 | 2017-05-31 | 日照宝华新材料有限公司 | The method that Thin Specs high-carbon steel is produced based on ESP bar strip continuous casting and rolling flow paths |
| CN109277544A (en) * | 2017-07-21 | 2019-01-29 | 上海梅山钢铁股份有限公司 | A method of control high-carbon steel slab internal flaw |
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| CN105002434A (en) * | 2015-08-13 | 2015-10-28 | 武汉钢铁(集团)公司 | Hot-rolled steel for steel disc of vehicle driven plate and preparation method of hot-rolled steel |
| CN105018835A (en) * | 2015-08-24 | 2015-11-04 | 武汉钢铁(集团)公司 | Medium-high carbon hot rolled strip steel with excellent fine blanking performance and production method |
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| CN106756507B (en) * | 2016-12-30 | 2018-11-09 | 日照钢铁控股集团有限公司 | The method for producing Thin Specs high-carbon steel based on ESP bar strip continuous casting and rolling flow paths |
| CN109277544A (en) * | 2017-07-21 | 2019-01-29 | 上海梅山钢铁股份有限公司 | A method of control high-carbon steel slab internal flaw |
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