CN106498293A - A kind of preparation method of hot forming with high-carbon hot continuous rolling pickling steel band - Google Patents

A kind of preparation method of hot forming with high-carbon hot continuous rolling pickling steel band Download PDF

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CN106498293A
CN106498293A CN201610979608.2A CN201610979608A CN106498293A CN 106498293 A CN106498293 A CN 106498293A CN 201610979608 A CN201610979608 A CN 201610979608A CN 106498293 A CN106498293 A CN 106498293A
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hot
steel band
continuous rolling
rolling
carbon
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CN106498293B (en
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汪创伟
张开华
李正荣
李卫平
崔凯禹
赵国英
陈东旭
彭小桥
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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Pangang Group Panzhihua Iron and Steel Research Institute Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/04Ferrous alloys, e.g. steel alloys containing manganese
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D8/00Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226Hot rolling
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/02Ferrous alloys, e.g. steel alloys containing silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C38/00Ferrous alloys, e.g. steel alloys
    • C22C38/06Ferrous alloys, e.g. steel alloys containing aluminium

Abstract

The present invention relates to a kind of hot forming preparation method of high-carbon hot continuous rolling pickling steel band, belongs to the preparing technical field of pickling steel band.Present invention solves the technical problem that being to provide the preparation method of the hot forming with high-carbon hot continuous rolling pickling steel band of low cost.The method is with C, based on Mn elements, improve C content, without Nb, Ti, V, B, Mo, La, under conditions of the alloying elements such as Cr, control smelting procedure ensures strand purity of steel, under the premise of chemical composition is uniform, it is equipped with rational Controlled Rolling And Controlled Cooling technique, obtain moderate strength, the higher hot rolled steel plate of elongation percentage, clipped, blanking, after heating, carry out hot forming, after heat treatment, final acquisition moderate strength, the higher parts of plasticity and toughness, it is widely used in automobile structure, the higher high-strength vehicle structure hot rolling of alternative alloy part content and production cost and cold-rolling continuous annealing steel plate and steel band.

Description

A kind of preparation method of hot forming with high-carbon hot continuous rolling pickling steel band
Technical field
The present invention relates to a kind of hot forming preparation method of high-carbon hot continuous rolling pickling steel band, belongs to the preparation of pickling steel band Technical field.
Background technology
Hot rolling acid-cleaning plate is with high-quality SPHC as raw material, removes oxide layer, trimming, finishing through pickling unit, mainly Operation has hot rolling raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → smooth online → trimming → online Oiling → bundling → packaging and storage, surface quality and use requirement (mainly cold bending or punching performance) between hot rolled plate and Intermediate products between cold-reduced sheet, are the preferable substitute products of part hot rolled plate and cold-reduced sheet.Hot rolling acid-cleaning plate is sheet material market Emerging product, its market development direction essentially consist in replacement cold-reduced sheet and substitute hot rolled plate, especially in recent years, high surface matter Amount, high formability acid-cleaning plate substitute think gauge cold-reduced sheet has become the development trend of international market.
Compared with hot rolled plate, the advantage of hot rolling acid-cleaning plate is essentially consisted in:Surface quality is good, dimensional accuracy is high, any surface finish Degree is high, can reduce the environmental pollution that user's dispersion pickling is caused;Compared with cold-reduced sheet, the advantage of acid-cleaning plate is ensureing surface On the premise of quality use requirement, effective reduces cost.
Hot forming techniques are the new techniques for producing advanced high-strength steel pressing that exploitation is promoted in recent years.Steel plate is existed Austenitic temperature high temperature above is heated, and then fast transfer obtains martensitic structure or many to stamping in module and quench Item tissue, the strength of parts after punching press are up to 1700MPa levels, due to its high intensity, can be applicable to automobile front/rear collision bumper, car The door car body safety component such as collision prevention girders and A posts, B posts, C posts, middle passage.Due to loss of weight, to improve safety and mouldability strong etc. Advantage, in the regional development speed such as Europe, U.S., the application of high intensity and superhigh intensity part on vehicle body is more next for this technology More, the hot stamping part demand in the whole world in 2015 is more than 600,000,000, and China as global automobile production and consumes big country, Demand also drastically rises.
Existing hot forming generally adds the alloying elements such as Ti, Nb, B with steel, obtains the steel alloy of superhigh intensity.Than Such as, patent CN104195443A " automobile high-strength anti-bending strength hot forming steel and its manufacture method " discloses a kind of high bending resistance Hot forming steel and its manufacture method, the main chemical compositions mass percent of the steel grade is:0.18%≤Cwt.≤0.30%, Siwt.≤0.50%, 1.00%≤Mnwt.≤1.60%, Pwt.≤0.015%, Swt.≤0.002%, 0.1%≤Crwt. ≤ 0.3%, 0.02%≤Tiwt.≤0.06%, 0.02%≤Als wt≤0.06%, 0.0005%≤Bwt.≤0.004%, [N]≤0.004%, [O]≤0.003%, remaining are Fe and inevitable impurity.Its manufacture method is cast for low-temperature heat Base, two-stage control rolling, quick cooling, low temperature are batched, and prepare coil of strip through cold rolling and critical annealing, and shearing prepares part material Piece, hot-forming.By the manufacture method can crystal grain thinning, improve material plasticity and toughness so as to absorb in deformation process More energy, improve vehicle safety.But the manufacture method need to add Ti, B alloying element, the raising strength of materials can be reached Purpose, final yield strength reaches more than 1000MPa, and more than tensile strength 1300MPa, elongation percentage reaches more than 5%, is super High-strength hot forming steel, although intensity is higher, but elongation percentage is relatively low, generally below 10%, can be real after adding Cr alloying elements Now expand the purpose of rolling mill practice window, but this will increase design of material cost.
And for the research of inexpensive, middle high-strength hot forming steel relatively fewer, at present strong in conventional automobile structure Degree steel be QSTE420 or QSTE500, the steel of these trades mark, mostly cold deformation hot-rolled steel, its tensile strength be 400~ The alloying elements such as Ti, Nb with the addition of still in 600MPa, but composition, relatively costly.
Content of the invention
Present invention solves the technical problem that being to provide the preparation side of the hot forming with high-carbon hot continuous rolling pickling steel band of low cost Method.
Preparation method of the hot forming of the present invention with high-carbon hot continuous rolling pickling steel band, includes that hot continuous rolling, hot rolling raw material are opened successively Volume, scale breading and pickling, obtain high-carbon hot continuous rolling pickling steel band, and wherein, before hot continuous rolling, the chemical composition of steel billet is by following weight hundred The group of ratio is divided to be grouped into:0.20≤C≤0.45%, Si≤1.00%, 1.00≤Mn≤1.80%, P≤0.015%, S≤ 0.005%, 0.010≤Als≤0.060%, N≤0.0050%, O≤0.0040%, remaining are Fe and inevitable impurity;
During the hot continuous rolling, billet heating temperature is 1180~1240 DEG C, and finishing temperature is 820~900 DEG C, coiling temperature For 580~680 DEG C;
The scale breading is 1.0~2.0% using the broken phosphorus of withdrawal straightening stands, withdrawal straightening stands elongation percentage.
Preferably, hot forming high-carbon hot continuous rolling pickling steel band yield strength ReH>=355MPa, tensile strength Rm490 ~680MPa, elongation percentage A80>=20%.After heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is less than 20 μm, and power Learn performance to be satisfied by requiring.
Further, the inventive method is concretely comprised the following steps:Vanadium extraction from hot metal → desulfurization → converter smelting → LF refining → RH Refine → continuous casting → heating stove heat → roughing → finish rolling → section cooling → batch → be air cooled to room temperature → hot rolling raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.
Preferably, during the heating stove heat, strand charging temperature≤300 DEG C.
Preferably, Argon process is carried out during the converter smelting, and the RH refines latter stage carries out Calcium treatment.
Further, the preferably described hot forming non-metallic inclusion A classes of high-carbon hot continuous rolling pickling steel band, B classes, C classes, D classes and DS classes are respectively less than 1.0 grades.
Compared with prior art, the present invention has the advantages that:
The present invention improves C content, without alloying elements such as Nb, Ti, V, B, Mo, La, Cr based on C, Mn element Under the conditions of, under the premise of smelting procedure ensures that strand purity of steel, chemical composition are uniform, it is equipped with rational Controlled Rolling And Controlled Cooling Technique, obtains the higher hot rolled steel plate of moderate strength, elongation percentage, after clipped, blanking, heating, carries out hot forming, heat treatment Afterwards, moderate strength is finally obtained, and the higher parts of plasticity and toughness are widely used in automobile structure, and alternative alloy part contains Amount and the higher high-strength vehicle structure hot rolling of production cost and cold-rolling continuous annealing steel plate and steel band.
Specific embodiment
Preparation method of the hot forming of the present invention with high-carbon hot continuous rolling pickling steel band, includes that hot continuous rolling, hot rolling raw material are opened successively Volume, scale breading and pickling, obtain high-carbon hot continuous rolling pickling steel band, and wherein, before hot continuous rolling, the chemical composition of steel billet is by following weight hundred The group of ratio is divided to be grouped into:0.20≤C≤0.45%, Si≤1.00%, 1.00≤Mn≤1.80%, P≤0.015%, S≤ 0.005%, 0.010≤Als≤0.060%, N≤0.0050%, O≤0.0040%, remaining are Fe and inevitable impurity;
During the hot continuous rolling, billet heating temperature is 1180~1240 DEG C, and finishing temperature is 820~900 DEG C, coiling temperature For 580~680 DEG C;
The scale breading is 1.0~2.0% using the broken phosphorus of withdrawal straightening stands, withdrawal straightening stands elongation percentage.
Preferably, hot forming high-carbon hot continuous rolling pickling steel band yield strength ReH>=355MPa, tensile strength Rm490 ~680MPa, elongation percentage A80>=20%.After heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is less than 20 μm, and power Learn performance to be satisfied by requiring.
Further, the inventive method is concretely comprised the following steps:Vanadium extraction from hot metal → desulfurization → converter smelting → LF refining → RH Refine → continuous casting → heating stove heat → roughing → finish rolling → section cooling → batch → be air cooled to room temperature → hot rolling raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.
Preferably, during the heating stove heat, strand charging temperature≤300 DEG C.
Preferably, Argon process is carried out during the converter smelting, and the RH refines latter stage carries out Calcium treatment.
Further, the non-metallic inclusion of the hot forming high-carbon hot continuous rolling pickling steel band meets table 1 and requires.
Table 1 is required with non-metallic inclusion
It is preferred that the hot forming non-metallic inclusion A classes of high-carbon hot continuous rolling pickling steel band, B classes, C classes, D classes and DS classes Respectively less than 1.0 grades.
Specifically, the inventive method is molten iron successively through vanadium extraction, desulfurization, converter (need Argon process), LF refining, RH refines (the operation latter stage carries out Calcium treatment), it is casting continuously to form slab;Strand temperature be down to less than 300 DEG C can shove charge, be heated to 1180~ 1240 DEG C, through 5 passes of single stand reversible roughing mill into middle base, then 7 frame hot continuous rollings are entered after Coil Box insulation Mm finishing mill unit, start rolling temperature are 980~1050 DEG C, and finishing temperature is 820~900 DEG C, then enters after section cooling and batches Machine batches to obtain strip steel, and coiling temperature is 580~680 DEG C;Coil of strip be air cooled to room temperature can uncoiling, coil of strip uncoiling need to use anti-crease rollers, Through withdrawal straightening stands scale breading (withdrawal straightening stands elongation percentage is 1.0~2.0%), again through pickling unit pickling, then oiling is packaged into into Product.
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit System is among described scope of embodiments.
Embodiment 1
Inexpensive hot forming high-carbon hot continuous rolling pickling steel is produced using 2050 Hot Rolling Mills (7 frame rolling finishing mill group) Band.The chemical component weight percentage ratio of steel billet of starting is:Cwt.:0.41%th, Siwt.:0.25%th, Mnwt.:1.18%, Pwt.:0.007%, Swt.:0.002%, Alswt.:0.036%, [N]:0.0040%, [O]:0.0029%, remaining be Fe and Inevitable impurity.Its production process is:Vanadium extraction from hot metal → desulfurization → converter (needing Argon to process) → LF refining → RH refines (the operation latter stage carries out Calcium treatment) → continuous casting → heating stove heat (strand charging temperature≤300 DEG C) → roughing → finish rolling → layer Stream cools down → batches → it is air cooled to room temperature → raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.Steel billet 230mm × 1450mm × Cmm, through 1210 DEG C heating after, after coming out of the stove after remove Squama, through 5 passes of single stand reversible roughing mill into 42mm × 1450mm × C1The middle base of mm, then be incubated through Coil Box, 7 rolling finishing mill groups are subsequently entered, 5.0mm × 1450mm × C is rolled into2The coil of strip of mm, start rolling temperature are 1020 DEG C, finish to gauge temperature Spend for 835 DEG C.Coiling machine being entered after section cooling and batching to obtain strip steel, coiling temperature is 586 DEG C.Coilcooling to room temperature (≤ 40 DEG C), through uncoiling (anti-crease rollers need to be used), weld together with front a roll of afterbody, then through withdrawal straightening stands scale breading, subsequently enter acid Groove pickling, pickling speed 80m/min repaste oil volume, obtain specification for 5.0mm × 1450mm × C2The hot forming high-carbon of mm Hot continuous rolling pickling steel band.
After measured, the hot forming of production is as follows with the performance of high-carbon hot continuous rolling pickling steel band:Yield strength, tensile strength, Elongation percentage be respectively 475MPa, 670MPa, 21.5%;Non-metallic inclusion A classes, B classes, C classes, D classes and DS classes are respectively less than 1.0 Level.After heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is less than 20 μm, and mechanical property is satisfied by requiring.
Yield strength, tensile strength, elongation percentage in present example, the assay method of non-metallic inclusion rank are all It is measured by national standard.
Embodiment 2
Inexpensive hot forming high-carbon hot continuous rolling pickling steel is produced using 2050 Hot Rolling Mills (7 frame rolling finishing mill group) Band.The chemical component weight percentage ratio of steel billet of starting is:Cwt.:0.22%th, Siwt.:0.22%th, Mnwt.:1.76%, Pwt.:0.009%, Swt.:0.003%, Alswt.:0.043%, [N]:0.0049%, [O]:0.0033%, remaining be Fe and Inevitable impurity.Its production process is:Vanadium extraction from hot metal → desulfurization → converter (needing Argon to process) → LF refining → RH refines (the operation latter stage carries out Calcium treatment) → continuous casting → heating stove heat (strand charging temperature≤300 DEG C) → roughing → finish rolling → layer Stream cools down → batches → it is air cooled to room temperature → raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.Steel billet 230mm × 1450mm × Cmm, through 1210 DEG C heating after, after coming out of the stove after remove Squama, through 5 passes of single stand reversible roughing mill into 42mm × 1400mm × C1The middle base of mm, then be incubated through Coil Box, 7 rolling finishing mill groups are subsequently entered, 6.0mm × 1400mm × C is rolled into2The coil of strip of mm, start rolling temperature are 1000 DEG C, finish to gauge temperature Spend for 881 DEG C.Coiling machine being entered after section cooling and batching to obtain strip steel, coiling temperature is 620 DEG C.Coilcooling to room temperature (≤ 40 DEG C), through uncoiling (anti-crease rollers need to be used), weld together with front a roll of afterbody, then through withdrawal straightening stands scale breading, subsequently enter acid Groove pickling, pickling speed 70m/min repaste oil volume, obtain specification for 6.0mm × 1400mm × C2The hot forming high-carbon of mm Hot continuous rolling pickling steel band.
After measured, the hot forming of production is as follows with the performance of high-carbon hot continuous rolling pickling steel band:Yield strength, tensile strength, Elongation percentage be respectively 462MPa, 654MPa, 25.0%;Non-metallic inclusion A classes, B classes, C classes, D classes and DS classes are respectively less than 1.0 Level.After heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is less than 20 μm, and mechanical property is satisfied by requiring.
Yield strength, tensile strength, elongation percentage in present example, the assay method of non-metallic inclusion rank are all It is measured by national standard.
Embodiment 3
Inexpensive hot forming high-carbon hot continuous rolling pickling steel is produced using 2050 Hot Rolling Mills (7 frame rolling finishing mill group) Band.The chemical component weight percentage ratio of steel billet of starting is:Cwt.:0.30%th, Siwt.:0.38%th, Mnwt.:1.45%, Pwt.:0.005%, Swt.:0.004%, Alswt.:0.031%, [N]:0.0038%, [O]:0.0026%, remaining be Fe and Inevitable impurity.Its production process is:Vanadium extraction from hot metal → desulfurization → converter (needing Argon to process) → LF refining → RH refines (the operation latter stage carries out Calcium treatment) → continuous casting → heating stove heat (strand charging temperature≤300 DEG C) → roughing → finish rolling → layer Stream cools down → batches → it is air cooled to room temperature → raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.Steel billet 230mm × 1250mm × Cmm, through 1210 DEG C heating after, after coming out of the stove after remove Squama, through 5 passes of single stand reversible roughing mill into 42mm × 1250mm × C1The middle base of mm, then be incubated through Coil Box, 7 rolling finishing mill groups are subsequently entered, 3.0mm × 1250mm × C is rolled into2The coil of strip of mm, start rolling temperature are 1000 DEG C, finish to gauge temperature Spend for 842 DEG C.Coiling machine being entered after section cooling and batching to obtain strip steel, coiling temperature is 656 DEG C.Coilcooling to room temperature (≤ 40 DEG C), through uncoiling (anti-crease rollers need to be used), weld together with front a roll of afterbody, then through withdrawal straightening stands scale breading, subsequently enter acid Groove pickling, pickling speed 90m/min repaste oil volume, obtain specification for 3.0mm × 1250mm × C2The hot forming high-carbon of mm Hot continuous rolling pickling steel band.
After measured, the hot forming of production is as follows with the performance of high-carbon hot continuous rolling pickling steel band:Yield strength, tensile strength, Elongation percentage be respectively 408MPa, 590MPa, 23.5%;Non-metallic inclusion A classes, B classes, C classes, D classes and DS classes are respectively less than 0.5 Level.After heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is less than 20 μm, and mechanical property is satisfied by requiring.
Yield strength, tensile strength, elongation percentage in present example, the assay method of non-metallic inclusion rank are all It is measured by national standard.
Embodiment 4
Inexpensive hot forming high-carbon hot continuous rolling pickling steel is produced using 2050 Hot Rolling Mills (7 frame rolling finishing mill group) Band.The chemical component weight percentage ratio of steel billet of starting is:Cwt.:0.26%th, Siwt.:0.38%th, Mnwt.:1.35%, Pwt.:0.005%, Swt.:0.002%, Alswt.:0.031%, [N]:0.0038%, [O]:0.0026%, remaining be Fe and Inevitable impurity.Its production process is:Vanadium extraction from hot metal → desulfurization → converter (needing Argon to process) → LF refining → RH refines (the operation latter stage carries out Calcium treatment) → continuous casting → heating stove heat (strand charging temperature≤300 DEG C) → roughing → finish rolling → layer Stream cools down → batches → it is air cooled to room temperature → raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.Steel billet 230mm × 1250mm × Cmm, through 1210 DEG C heating after, after coming out of the stove after remove Squama, through 5 passes of single stand reversible roughing mill into 42mm × 1250mm × C1The middle base of mm, then be incubated through Coil Box, 7 rolling finishing mill groups are subsequently entered, 3.0mm × 1250mm × C is rolled into2The coil of strip of mm, start rolling temperature are 1000 DEG C, finish to gauge temperature Spend for 834 DEG C.Coiling machine being entered after section cooling and batching to obtain strip steel, coiling temperature is 588 DEG C.Coilcooling to room temperature (≤ 40 DEG C), through uncoiling (anti-crease rollers need to be used), weld together with front a roll of afterbody, then through withdrawal straightening stands scale breading, subsequently enter acid Groove pickling, pickling speed 90m/min repaste oil volume, obtain specification for 3.0mm × 1250mm × C2The hot forming high-carbon of mm Hot continuous rolling pickling steel band.
After measured, the hot forming of production is as follows with the performance of high-carbon hot continuous rolling pickling steel band:Yield strength, tensile strength, Elongation percentage be respectively 428MPa, 612MPa, 27.5%;Non-metallic inclusion A classes, B classes, C classes, D classes and DS classes are respectively less than 0.5 Level.After heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is less than 20 μm, and mechanical property is satisfied by requiring.
Yield strength, tensile strength, elongation percentage in present example, the assay method of non-metallic inclusion rank are all It is measured by national standard.
Comparative example 1
Using the method for embodiment 2, only change the chemical composition of the steel billet of starting, its chemical component weight percentage ratio is: Cwt.:0.16%th, Siwt.:0.32%th, Mnwt.:1.78%, Pwt.:0.010%, Swt.:0.004%, Alswt.: 0.029%, [N]:0.0033%, [O]:0.0021%, remaining is Fe and inevitable impurity.
After measured, the hot forming of production is as follows with the performance of high-carbon hot continuous rolling pickling steel band:Yield strength, tensile strength, Elongation percentage be respectively 409MPa, 588MPa, 30.2%;Non-metallic inclusion A classes, B classes, C classes, D classes and DS classes are respectively less than 0.5 Level.But after heat treatment in the range of 880~950 DEG C, surface-carburized layer thickness is up to more than 30 μm, and the yield strength after heat treatment 355MPa is below, is unsatisfactory for requiring.

Claims (6)

1. a kind of preparation method of hot forming with high-carbon hot continuous rolling pickling steel band, includes hot continuous rolling, hot rolling raw material uncoiling successively, breaks Squama and pickling, obtain high-carbon hot continuous rolling pickling steel band, it is characterised in that:Before hot continuous rolling, the chemical composition of steel billet is by following weight hundred The group of ratio is divided to be grouped into:0.20≤C≤0.45%, Si≤1.00%, 1.00≤Mn≤1.80%, P≤0.015%, S≤ 0.005%, 0.010≤Als≤0.060%, N≤0.0050%, O≤0.0040%, remaining are Fe and inevitable impurity;
During the hot continuous rolling, billet heating temperature is 1180~1240 DEG C, and finishing temperature is 820~900 DEG C, and coiling temperature is 580~680 DEG C;
The scale breading is 1.0~2.0% using the broken phosphorus of withdrawal straightening stands, withdrawal straightening stands elongation percentage.
2. preparation method of the hot forming according to claim 1 with high-carbon hot continuous rolling pickling steel band, it is characterised in that:Described Hot forming high-carbon hot continuous rolling pickling steel band yield strength ReH>=355MPa, tensile strength Rm490~680MPa, elongation percentage A80≥ 20%.
3. preparation method of the hot forming according to claim 1 with high-carbon hot continuous rolling pickling steel band, it is characterised in that:Production Method is concretely comprised the following steps:Vanadium extraction from hot metal → desulfurization → converter smelting → LF refining → RH refines → continuous casting → heating stove heat → Roughing → finish rolling → section cooling → batch → be air cooled to room temperature → hot rolling raw material uncoiling → laser welding → withdrawal straightening stands scale breading → pickling → rinsing → trimming → online oiling → bundling → packaging and storage.
4. preparation method of the hot forming according to claim 3 with high-carbon hot continuous rolling pickling steel band, it is characterised in that:Described During heating stove heat, strand charging temperature≤300 DEG C.
5. preparation method of the hot forming according to claim 3 with high-carbon hot continuous rolling pickling steel band, it is characterised in that:Described Argon process is carried out during converter smelting, and the RH refines latter stage carries out Calcium treatment.
6. preparation method of the hot forming according to claim 3 with high-carbon hot continuous rolling pickling steel band, it is characterised in that:Described The hot forming non-metallic inclusion A classes of high-carbon hot continuous rolling pickling steel band, B classes, C classes, D classes and DS classes are respectively less than 1.0 grades.
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CN109112360A (en) * 2017-06-26 2019-01-01 鞍钢股份有限公司 A kind of zinc-aluminium base clad steel sheet and its manufacturing method, thermoforming process and component
CN109881080A (en) * 2019-03-20 2019-06-14 包头钢铁(集团)有限责任公司 A kind of middle carbon spring-like hot-rolled coil and its manufacturing method
CN111155033A (en) * 2020-02-26 2020-05-15 攀钢集团攀枝花钢铁研究院有限公司 B-containing high-formability ultrathin hot-rolled pickled plate and preparation method thereof

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CN111155033A (en) * 2020-02-26 2020-05-15 攀钢集团攀枝花钢铁研究院有限公司 B-containing high-formability ultrathin hot-rolled pickled plate and preparation method thereof

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