CN102251192A - Enamel steel and production method thereof - Google Patents
Enamel steel and production method thereof Download PDFInfo
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Abstract
The invention discloses enamel steel which comprises the following chemical components in percentage by weight: not more than 0.050 percent of C, not more than 0.10 percent of Si, not more than 0.50 percent of Mn, not more than 0.035 percent of P, not more than 0.035 percent of S, 0.031-0.10 percent of Al, not more than 0.015 percent of N, not less than 0.001 percent of O, 0.0003-0.020 percent of B, 0.01-0.50 percent of Cu , one or more than two of 0.01-0.10 percent of Nb, 0.01-0.10 percent of V and 0.01-0.15 percent of Ti, one or more two of 0.01-0.10 percent of Cr, 0.01-0.10 percent of Ni and 0.01-0.10 percent of Mo, as well as the balance of Fe and inevitable impurity elements, wherein the total amount of the components except for the Fe and the inevitable impurity elements is controlled to be 0.10-0.30 percent. The production method for a cold-rolled sheet of the enamel steel comprises the following steps of: smelting, continuous rolling and hot rolling, wherein the temperature of finished rolling is 700-950DEG C and the rolling temperature is 550-750DEG C; carrying out cold rolling with the downward rolling rate of over 60 percent; and carrying out continuous annealing or cover annealing at the annealing temperature of 650-900DEG C for 1 minute to 20 hours. The enamel steel cold rolling plate has excellent forming performance, scale blasting resistance and needle hole resistance and is suitable for producing components of household appliances, sanitary appliances, kitchens, building decorative panels and the like.
Description
Technical field
The present invention relates to Glassed Steel and manufacture method thereof, particularly relate to Glassed Steel and manufacture method thereof with good formability, scaling resistance, adherence and anti-needle pore defect, Glassed Steel of the present invention is suitable for making household electrical appliances parts, sanitary equipment, kitchen tools and building decoration panel etc.
Background technology
Characteristics such as steel plate carries out the application of slip on the surface of end embryo then through making end embryo after the machine-shaping, and that the goods behind the enamel have is specious, solidity to corrosion good, easy to clean, thereby Application Areas is very extensive.
General steel plate produces that squama is quick-fried, adherence is bad and defective such as pin hole through regular meeting in the enamel process, grievous injury the quality of enamelware.Along with the range of application of enamelware constantly enlarges, requirement to the enamel quality is also more and more higher, general steel plate can't satisfy the requirement of machine-shaping and enamel quality, need have the enamel special-purpose steel of good application of slip performance, to adapt to the development need of enamel industry.
Have in the prior art and introduce Glassed Steel, wherein many high-oxygen steels that relates to, oxygen content in steel is up to 0.10%.Elevated oxygen level helps decarburization on the one hand, and oxygen forms a large amount of oxide inclusion in steel on the other hand, and these inclusiones help improving the scaling resistance and the adherence of steel plate.But oxide inclusion is too much understood the plasticity and the surface quality of grievous injury steel plate.
Disclose a kind of enamel cold-rolled steel sheet and manufacture method thereof as JP2001-342542A, specifically disclosing the weight percent composition is C≤0.0035, Si≤0.01, Mn:0.2～0.4, P:0.003～0.10, S:0.005～0.03, Al≤0.001, N≤0.0035, O:0.045～0.10, Cu:0.02～0.05, Cr:0.03～0.08, Mo:0.002～0.08,0.5≤Cr/O≤1.3.
JP2005-272926A discloses a kind of enamel sheet and manufacture method thereof of enamel adherence excellence, specifically disclosing the weight percent composition is C≤0.0040, Si≤0.5, Mn:0.05～0.95, P≤0.20, S≤0.080, Al≤0.01, N≤0.010, O:0.005～0.045, Cu:0.05～8.0, Ni:0.10～8.0.
JP11-061333A discloses the height pharynx steel and the manufacture method thereof of a kind of surface property and enamel excellence, specifically disclosing the weight percent composition is C≤0.005, N≤0.005, O:0.04～0.07, Cr:0.01～0.15, at least a and multiple among Nb, V, the Zr, total amount 0.01～0.10.
CN1659298A discloses a kind of vitreous enamel steel plate with fabulous workability, resistance to deterioration and enamel property, C:0.0050% or still less the weight percent composition is specifically disclosed is, Si:0.50% or still less, Mn:0.005 to 1.0%, P:10 * (B-11/14 * N) to 0.10%, S:0.080% or still less, Al:0.050% or still less, N:0.0005 to 0.020%, B:0.60 * N to 0.020%, and O:0.002 to 0.0800%.Mainly control the shape of the nitride of boron by regulating hot-rolled condition.
CN101356295A discloses a kind of scaling resistance significantly excellent continuous casting enamel sheet and manufacture method thereof, improves the ability that captures hydrogen that increases by making the space formation ability in the steel plate.
JP2005-510624A discloses the enamel sheet and the manufacture method thereof of a kind of processibility and scaling resistance excellence, specifically disclosing the weight percent composition is C≤0.010%, Si≤0.03%, Mn:0.03～1.3%, P≤0.035%, S:0.025～0.08%, Al≤0.02%, N≤0.0055%, O:0.005～0.055%, Cu:0.02～0.045%, Nb:0.004～0.06%, V:0.003～0.06%.
CN101517115A and EP2065482A1 all relate to ultra low-carbon steel (being C≤0.010%).This type of steel adopts the smelting process of rimming steel usually, through decarburizing annealing the carbon in the steel is reduced to below 0.010% then.But, both required to control furnace atmosphere during decarburizing annealing, also need open coil annealing, so production efficiency can reduce greatly after increasing decarburizing annealing technology.
JP2005-330510A also is a kind of soft steel that does not need aluminium deoxidation.Composition range among CN101517115A and the EP2065482A1 is very wide, does not add the lower B of cost of alloy in the steel, but has added alloying elements such as Ni, Co, Cr, Cu, Mo and Ti, and its high-content can reach 8%.
Added a large amount of alloying elements among JP2006-037215A and the JP2006-045580A especially, wherein the minimum add-on of each element such as Cu, Co, Ni and Mo is 0.051%, is up to 8.0%.
Now, the smelting technology level improve day by day and smelt the equipment very advanced, not only easy to implement with smelting and continuous casting process production aluminium killed steel technology, and the production efficiency height, overcome shortcomings such as quality instability, performance that rimming steel in the past produces are inhomogeneous, surface quality is poor, processing characteristics is bad.And, very high by the controlled levels of elements such as existing processes and equipment carbon, can reach design requirements basically.Directly can reach the control requirement of final carbon by refining, not need to take the method for decarburizing annealing.
Summary of the invention
The object of the present invention is to provide a kind of Glassed Steel.The span of control of the main chemical elements by proposing steel, reasonably alloying element design is used to produce the Glassed Steel with good formability, scaling resistance, adherence and anti-needle pore defect.
To achieve these goals, the main component of Glassed Steel of the present invention is (weight %): C≤0.050, Si≤0.10, Mn≤0.50, P≤0.035, S≤0.035, A1:0.031～0.10, N≤0.015, O 〉=0.001, B:0.0003～0.020, Cu:0.01～0.50; Also contain in Nb:0.01～0.10, V:0.01～0.10, Ti:0.01～0.15 one or more; Also contain in Cr:0.01～0.10, Ni:0.01～0.10, Mo:0.01～0.10 one or more, wherein overall control is 0.01～0.30; All the other are Fe and unavoidable impurities element.
Preferably, C:0.001～0.050%.
Preferably, Si:0.01～0.10%.
Preferably, Mn:0.10～0.50%.
Preferably, P:0.008～0.035%.
Preferably, S:0.004～0.035%.
Preferably, N:0.002～0.015%.
Preferably, O:0.001～0.020%.
Preferably, Cu/P:1～5.
Another object of the present invention provides the manufacture method of Glassed Steel.
In order to realize this purpose, the manufacture method of Glassed Steel of the present invention comprises:
(1) in refining process, can adopt nitrogen circulation technology to control nitrogen in the steel with the molten steel of converter smelting;
(2) with continuous cast method the molten steel of smelting is cast continuously cast bloom;
(3) add hot continuously cast material and carry out hot rolling.The hot rolled finishing temperature is controlled in 700～950 ℃ the temperature range, is cooled to coiling temperature then, and coiling temperature is 550～750 ℃; Preferably, average rate of cooling≤50 ℃/s.More preferably, average rate of cooling is 5～25 ℃/s.
(4) steel plate carries out cold rolling, cold rolling total draft more than 60% behind the pickling scale removal, and preferably, cold rolling draft is 60～80%;
(5) annealing can be adopted continuous annealing or bell-type annealing mode, and annealing temperature is 650～900 ℃, and annealing time is 1 minute～20 hours.Preferably, when continuous annealing, annealing time is 1～10 minute; When bell-type annealing, annealing time is 15～20 hours.
Below the explanation main chemical elements is to effect of the present invention:
Carbon :≤0.050%
Along with the reduction of carbon content, the plasticity of steel plate improves.Embryo carbon in the steel in the enamel process plays significant effects to the enamel surface quality at the bottom of the steel plate, this is because carbon can reaction generate carbon monoxide in the enamel firing process, generate more carbon monoxide when carbon content improves in the steel and form bubble, serious meeting produces needle pore defect, infringement enamel quality.For fear of this defective, the carbon in the steel will be controlled lowly.Among the present invention carbon content be controlled at≤0.050%, consider manufacturing process, preferably, C:0.001～0.050%.
Aluminium: 0.031～0.10%
In aluminium killed steel, aluminium is strong deoxidant element.In addition, aluminium and nitrogen reaction generate aluminium nitride, and aluminium nitride can play a part certain to the scaling resistance that improves steel.The content of control aluminium is 0.031～0.10% among the present invention.
Manganese :≤0.50%
Manganese is deoxidant element, and manganese also generates manganese sulfide with reaction of Salmon-Saxl.But manganese content is unsuitable too high, is controlled at usually≤and 0.50% scope is interior more suitable.The intensity of steel improves during the manganese too high levels, but plasticity obviously reduces.Preferably, Mn:0.10～0.50%.
Silicon :≤0.10%
Silicon is harmful element, and the silicone content height not only can damage enamel property, and forms the plasticity of the very poor oxide inclusion infringement steel of ductility.Silicone content is controlled at below 0.10% among the present invention, preferably, and Si:0.01～0.10%.
Phosphorus :≤0.035%
Phosphorus is harmful element.Phosphorus content is too high, and is poly-partially on crystal boundary easily, influences the enamel quality, and phosphorus content is low more good more among the present invention.
Sulphur :≤0.035%
Sulphur and manganese form manganese sulfide, can also form titanium sulfide with titanium etc., can be useful to improving scaling resistance.By adding the form that titanium can also obviously improve manganese sulfide, avoid forming the good manganese sulfide inclusion of single plasticity, help improving formability.Sulphur content is controlled at below 0.035 among the present invention, preferably, and S:0.004～0.035%.
Boron: 0.0003～0.020%
Boron is strong nitride forming element.Adding behind the boron it in the steel and mainly separate out the BN particle with the nitrogen reaction, make these particles be the small and dispersed distributions in steel by technology controlling and process, can be highly effective to the scaling resistance of raising steel plate.If in the steel simple rely on add boron improve scaling resistance can the time, then need the boron amount that adds higher.Boron is the alloying element of easy scaling loss in smelting process, and its stable control is difficult, and the high more difficult more control of boron content, and the fluctuation meeting of boron content directly influences the performance of finished product steel plate.Therefore, adopt the method for boron and compound addings such as niobium, vanadium and titanium more simple and easy to do.In addition, during the boron too high levels, in casting process, be easy to generate the corner crack of continuously cast bloom.Behind the alloys such as adding titanium, these alloying elements can more be changed places and nitrogen formation compound than boron, avoid forming a large amount of boron nitride, thereby greatly reduce the crack sensitivity of continuously cast bloom.
Niobium: 0.01～0.10%, vanadium: 0.01～0.10%, titanium: 0.01～0.15%
Niobium, vanadium and titanium all are strong carbon, nitride forming element.They both can form single carbon, nitride, can form the compound compound again.Steel billet is in hot rolled heat-processed, and the carbon of these niobiums, vanadium and titanium in the steel, nitrogen compound meeting part or most of dissolving can be separated out in course of hot rolling then again.By the control hot rolling technology, guarantee that the state that they are small and dispersed separates out and be distributed in the matrix of steel, avoid forming thick inclusion as far as possible, improved the formability of steel plate so on the one hand, these precipitated phases are highly effective storage hydrogen traps on the other hand, to preventing that in the enamel process squama outburst life from being very favourable.
Copper: 0.01～0.50%
Copper can improve the solidity to corrosion of steel plate, influences the pickling speed of steel plate, and an amount of copper helps improving the adherence between the embryo and enamel at the bottom of the steel plate.But the copper too high levels, the intensity that can improve steel is damaged the formability of steel.Preferably, Cu/P is 1～5.
Nickel: 0.01～0.10%
Nickel can form oxide compound in steel, perhaps form the compound oxide compound with titanium etc.These oxide compounds help application of slip effect.
Chromium: 0.01～0.10%
Chromium also forms oxide compound easily in steel, useful to improving scaling resistance.
Molybdenum: 0.01～0.10%
Molybdenum can improve the solidity to corrosion of steel plate, influences the pickling speed of steel plate, and an amount of molybdenum can improve the adherence between steel plate and the enamel.
Oxygen 〉=0.001%
Oxygen is inevitable in steel.Oxide compound directly influences the scaling resistance and the formability of steel plate, and the high scaling resistance of oxide content can be got well but the formability variation, and vice versa.Control for Oxygen Content is more than 0.001% among the present invention, preferably O:0.001～0.020%.
Nitrogen≤0.015%
Nitrogen is the same with carbon to be solid solution element, and nitrogen and niobium, vanadium, titanium and boron etc. can form compound, and these compounds can be useful for the scaling resistance that improves steel.But if nitrogen content is too high, the amount of the nitride of formation is also high, and particle becomes thick, the plasticity of meeting grievous injury steel.Nitrogen in steel content of the present invention is controlled at below 0.015%.
The below influence of explanation technological process.
Bessemerize and refining treatment: purpose is to guarantee the basal component requirement of molten steel, and decarburization is also removed obnoxious flavour in the steel, adds necessary alloying element, carries out the composition adjustment.Particularly will control elements such as carbon, nitrogen, sulphur and oxygen, because they can form the scaling resistance that all cpds helps improving steel, but excessive inclusion can damage the formability of steel again.
Continuous casting: continuous casting has a lot of advantages than die casting, mainly contains that internal component is even, surface quality good, lumber recovery is high, production efficiency is high.
Hot rolling: add hot continuously cast material and carry out hot rolling, heating and temperature control is at 1100～1250 ℃.Adopt higher Heating temperature, make continuously cast bloom in heat-processed, make on the one hand the austenite structure homogenizing in the steel, make in the compound of niobium, vanadium, titanium and boron etc. some or most of dissolving on the other hand.In hot rolling and process of cooling, they can be separated out again with the form of compound, are the small and dispersed distributions in matrix.The hot rolled finishing temperature is controlled in 700～950 ℃ of scopes, and coiling temperature is controlled in 550～750 ℃ of scopes.Adopt higher finishing temperature and coiling temperature, the austenite structure of steel is transformed into ferritic structure in rolling and coiling process, and finishes the recrystallize and the grain growth of ferritic structure.
Pickling and cold rolling: steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is more than 60%, raising along with cold rolling draft, the distortional strain energy of steel plate inside increases, in steel, to store enough distortional strain energies, therefore adopt higher cold rolling draft to help storing enough distortional strain energies in the steel after annealing, therefore adopt higher cold rolling draft to help recrystallize and texture evolution after annealing.Preferably, cold rolling total draft is 60～80%,
Annealing: annealing can be adopted the mode of continuous annealing or bell-type annealing, annealing temperature is 650～900 ℃, annealing time is 1 minute～20 hours, and annealing process guarantees that the ferritic structure in the steel finishes the abundant development of recrystallize and grain growth and recrystallization texture.
The present invention designs production technique and main processing parameter, produces cold rolling enameling sheet with continuous casting process.Specifically, the present invention is based on the aluminium killed steel that continuous casting process is produced.Carbon in smelting process in the control steel, nitrogen, sulphur are in suitable scope, and add an amount of boron in steel, to form an amount of BN, add alloying elements such as niobium, vanadium or titanium, in steel, to form compound with carbon, nitrogen etc., guarantee that by technology controlling and process these compounds mainly exist with the second phase particulate forms of small and dispersed, improve the formability of steel on the one hand, improve the scaling resistance and the anti-needle pore defect ability of steel on the other hand.In addition, add a spot of copper, nickel, chromium or molybdenum etc., help improving the adherence and the scaling resistance of steel.The production technique of this cold rolling enameling sheet is simple and easy to do, and alloying element is reasonable in design, and cost is lower.
Adopt the Glassed Steel of mentioned component design and processes control method manufacturing to have good formability, scaling resistance, adherence and anti-needle pore defect, be suitable for making household electrical appliances parts, sanitary equipment, kitchen tools and building decoration panel etc.The production technique of cold rolling enameling sheet of the present invention is simple and easy to do, and alloying element is reasonable in design, and cost is lower.
Embodiment
Below the present invention is described in detail by specific embodiment.
Embodiment 1
According to the chemical ingredients shown in the embodiment in the table 11, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element V, Ti, Cr, Ni, Cu and Mo then, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1150 ℃, carries out hot rolling, finishing temperature is controlled at 700 ℃, and coiling temperature is controlled at 550 ℃.Hot-rolled steel sheet is carried out cold rolling, cold rolling total draft after iron scale is removed in pickling be 70%.Carry out continuous annealing again, annealing temperature is 760 ℃, and annealing time is 3 minutes, guarantees that the ferritic structure in the steel finishes the abundant development of recrystallize and grain growth and recrystallization texture.
The Glassed Steel finished product steel plate that obtains like this, yield strength (R
P0.2) 288MPa, tensile strength (Rm) is 369MPa, unit elongation (A
80) be 35.5%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burn till the back and place 48 hours observation surfaces later in air, it is existing to find that the surface does not have squama to produce.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 2
According to the chemical ingredients shown in 2 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds Nb, V, Ti, Cr, Cu and Ni alloying element, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1200 ℃ and carries out hot rolling, and finishing temperature is controlled at 750 ℃, and coiling temperature is controlled at 600 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 60%.Carry out bell-type annealing again, annealing temperature is 680 ℃, and annealing time is 18 hours.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 260MPa, tensile strength (Rm) is 341MPa, unit elongation (A
80) be 35.8%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burn till the back and place observation later in 48 hours in air, it is existing that the surface does not have squama to produce.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 3
According to the chemical ingredients shown in 3 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, Ti, Cr, Cu and Ni, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and finishing temperature is controlled at 900 ℃, and coiling temperature is controlled at 730 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 70%.Carry out continuous annealing again, annealing temperature is 850 ℃, and annealing time is 1 minute.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 277MPa, tensile strength (Rm) is 356MPa, unit elongation (A
80) be 35.5%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burn till the back and place observation later in 48 hours in air, it is existing that the surface does not have squama to produce.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 4
According to the chemical ingredients shown in 4 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, Ti, Cr, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and the hot rolled finishing temperature is controlled at 850 ℃, and coiling temperature is controlled at 670 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 75%.Carry out bell-type annealing again, annealing temperature is 650 ℃, and annealing time is 20 hours.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 299MPa, tensile strength (Rm) is 376MPa, unit elongation (A
80) be 34.1%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 5
According to the chemical ingredients shown in 5 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element V, Ti, Cr, Cu, Ni and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1100 ℃ and carries out hot rolling, and finishing temperature is controlled at 750 ℃, and coiling temperature is controlled at 630 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 80%.Carry out continuous annealing again, annealing temperature is 700 ℃, and annealing time is 5 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 188MPa, tensile strength (Rm) is 318MPa, unit elongation (A
80) be 42.4%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 6
According to the chemical ingredients shown in 6 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element V, Ti, Cu, Cr and Ni, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1100 ℃ and carries out hot rolling, and finishing temperature is controlled at 700 ℃, and coiling temperature is controlled at 550 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 75%.Carry out continuous annealing again, annealing temperature is 700 ℃, and annealing time is 5 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 209MPa, tensile strength (Rm) is 315MPa, unit elongation (A
80) be 42.5%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 7
According to the chemical ingredients shown in 7 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, Ti, Cr, Cu, Ni and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and finishing temperature is controlled at 870 ℃, and coiling temperature is controlled at 750 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 60%.Carry out continuous annealing again, annealing temperature is 720 ℃, and annealing time is 4 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 177MPa, tensile strength (Rm) is 309MPa, unit elongation (A
80) be 41.9%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 8
According to the chemical ingredients shown in 8 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, V, Ti, Cr, Cu and Ni, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1150 ℃ and carries out hot rolling, and finishing temperature is controlled at 800 ℃, and coiling temperature is controlled at 650 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 70%.Carry out bell-type annealing again, annealing temperature is 670 ℃, and annealing time is 20 hours.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 215MPa, tensile strength (Rm) is 325MPa, unit elongation (A
80) be 43.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 9
According to the chemical ingredients shown in 9 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, Ni and Cu, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and finishing temperature is controlled at 870 ℃, and coiling temperature is controlled at 700 ℃.Adopt the laminar flow cooling after the hot rolling, average rate of cooling is 20 ℃/s.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 75%.Carry out continuous annealing again, annealing temperature is 760 ℃, and annealing time is 3 minutes.
The Glassed Steel finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 299MPa, tensile strength (Rm) is 375MPa, unit elongation (A
80) be 32.5%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 10
According to the chemical ingredients shown in 10 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element V, Ni, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1200 ℃ and carries out hot rolling, and finishing temperature is controlled at 830 ℃, and coiling temperature is controlled at 720 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 75%.Carry out continuous annealing again, annealing temperature is 750 ℃, and annealing time is 3 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 189MPa, tensile strength (Rm) is 312MPa, unit elongation (A
80) be 41.3%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 11
According to the chemical ingredients shown in 11 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element V, Ti, Cr, Cu, Ni and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and finishing temperature is controlled at 950 ℃, and coiling temperature is controlled at 750 ℃.Steel plate carries out cold rolling, cold rolling total draft after iron scale is removed in pickling be 70%.Carry out continuous annealing again, annealing temperature is 750 ℃, and annealing time is 6 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 157MPa, tensile strength (Rm) is 296MPa, unit elongation (A
80) be 43.1%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 12
According to the chemical ingredients shown in 12 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, V, Ti, Ni and Cu, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1200 ℃ and carries out hot rolling, and finishing temperature is controlled at 900 ℃, and coiling temperature is controlled at 730 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 70%.Carry out continuous annealing again, annealing temperature is 850 ℃, and annealing time is 4 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 149MPa, tensile strength (Rm) is 305MPa, unit elongation (A
80) be 45.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 13
According to the chemical ingredients shown in 13 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, Ti, Cr, Ni and Cu, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and finishing temperature is controlled at 930 ℃, and coiling temperature is controlled at 750 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 60%.Carry out continuous annealing again, annealing temperature is 900 ℃, and annealing time is 1 minute.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 185MPa, tensile strength (Rm) is 302MPa, unit elongation (A
80) be 40.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 14
According to the chemical ingredients shown in 14 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, V, Ti, Cr, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1250 ℃ and carries out hot rolling, and finishing temperature is controlled at 910 ℃, and coiling temperature is controlled at 700 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 75%.Carry out continuous annealing again, annealing temperature is 900 ℃, and annealing time is 2 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 152MPa, tensile strength (Rm) is 296MPa, unit elongation (A
80) be 43.7%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 15
According to the chemical ingredients shown in 15 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element Ti, Cr and Cu, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1200 ℃ and carries out hot rolling, and finishing temperature is controlled at 850 ℃, and coiling temperature is controlled at 700 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 80%.Carry out bell-type annealing again, annealing temperature is 680 ℃, and annealing time is 18 hours.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 140MPa, tensile strength (Rm) is 295MPa, unit elongation (A
80) be 48.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 16
According to the chemical ingredients shown in 16 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element V, Ti, Cr, Ni, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
Continuously cast bloom is heated to 1200 ℃ and carries out hot rolling, and finishing temperature is controlled at 700 ℃, and coiling temperature is controlled at 550 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 75%.Carry out continuous annealing again, annealing temperature is 750 ℃, and annealing time is 6 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 155MPa, tensile strength (Rm) is 296MPa, unit elongation (A
80) be 43.4%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 17
According to the chemical ingredients shown in 17 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, V, Cr, Ni, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
According to 17 technology in the table 2, continuously cast bloom is heated to 1150 ℃ and carries out hot rolling, and finishing temperature is controlled at 700 ℃, and coiling temperature is controlled at 570 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 75%.Carry out bell-type annealing again, annealing temperature is 680 ℃, and annealing time is 18 hours.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 148MPa, tensile strength (Rm) is 294MPa, unit elongation (A
80) be 46.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 18
According to the chemical ingredients shown in 18 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, Cr, Ni and Cu, carries out the composition adjustment.Continuous casting becomes steel billet.
According to 18 technology in the table 2, continuously cast bloom is heated to 1150 ℃ and carries out hot rolling, and finishing temperature is controlled at 800 ℃, and coiling temperature is controlled at 650 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 65%.Carry out continuous annealing again, annealing temperature is 870 ℃, and annealing time is 2 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 152MPa, tensile strength (Rm) is 296MPa, unit elongation (A
80) be 43.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 19
According to the chemical ingredients shown in 19 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloy element Nb, V, Ti, Cr, Ni, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
According to 19 technology in the table 2, continuously cast bloom is heated to 1150 ℃ and carries out hot rolling, and finishing temperature is controlled at 750 ℃, and coiling temperature is controlled at 600 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 75%.Carry out continuous annealing again, annealing temperature is 850 ℃, and annealing time is 4 minutes.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 153MPa, tensile strength (Rm) is 296MPa, unit elongation (A
80) be 44.0%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Embodiment 20
According to the chemical ingredients shown in 20 in the table 1, bessemerizing and refining treatment, guarantee the basal component requirement of molten steel, decarburization is also removed obnoxious flavour in the steel, adds alloying element Ti, Cr, Ni, Cu and Mo, carries out the composition adjustment.Continuous casting becomes steel billet.
According to 19 technology in the table 2, continuously cast bloom is heated to 1200 ℃ and carries out hot rolling, and finishing temperature is controlled at 850 ℃, and coiling temperature is controlled at 700 ℃.Steel plate carries out cold rolling after iron scale is removed in pickling.Cold rolling total draft is 75%.Carry out bell-type annealing again, annealing temperature is 650 ℃, and annealing time is 20 hours.
The finished product steel plate that adopts mentioned component and process control method to make, yield strength (R
P0.2) 148MPa, tensile strength (Rm) is 294MPa, unit elongation (A
80) be 43.3%, through carrying out the application of slip and sintering after the pre-treatments such as degreasing, pickling.With visiing Ke's ground-coat enamel and cover-coat enamel, wet-process enameling adopts twice firing process of twice enamel.Burning till 48 hours later surfaces of observing of placement in air, back does not have squama to produce now.Adhesion property is tested by the test method in the BS EN10209:1996 standard, and its adhesion property reaches the A1 level.
Bai Ke in the foregoing description is the enamel that Belgian PEMCO company produces, and is one of at present the most frequently used in the world enamel.
In sum, the finished product steel plate that composition of the present invention and technology obtain is tested through the application of slip, and it is existing that the surface does not all have squama to produce, and the adhesion property between steel plate and the enamel all reaches the A1 level.
The finished product steel plate that adopts composition of the present invention and explained hereafter carries out the application of slip and sintering through after the pre-treatment, and the enamel test-results shows and do not take place fish-scaling effectly that adherence between steel plate and the enamel is good, and needle pore defect is also in the scope that requires.
This invention steel not only has good formability, and have good scaling resistance, adherence and an anti-needle pore defect ability, be applicable to enamel products such as making light industry, household electrical appliances, also can be applied in the enamel products such as building decoration panel, have wider Application Areas, have a extensive future.
Claims (13)
1. Glassed Steel, its chemical ingredients by weight percentage is: C≤0.050%, Si≤0.10%, Mn≤0.50%, P≤0.035%, S≤0.035%, Al:0.031～0.10%, N≤0.015%, O 〉=0.001%, B:0.0003～0.020%, Cu:0.01～0.50%; Also contain in Nb:0.01～0.10%, V:0.01～0.10%, Ti:0.01～0.15% one or more; Also contain in Cr:0.01～0.10%, Ni:0.01～0.10%, Mo:0.01～0.10% one or more, wherein overall control is 0.01～0.30%; All the other are Fe and unavoidable impurities element.
2. Glassed Steel as claimed in claim 1 is characterized in that, C:0.001～0.050%.
3. Glassed Steel as claimed in claim 1 or 2 is characterized in that, Si:0.01～0.10%.
4. as the arbitrary described Glassed Steel of claim 1～3, it is characterized in that Mn:0.01～0.50%.
5. as the arbitrary described Glassed Steel of claim 1～4, it is characterized in that P:0.008～0.035%, S:0.004～0.035%.
6. as the arbitrary described Glassed Steel of claim 1～5, it is characterized in that N:0.002～0.015%.
7. as the arbitrary described Glassed Steel of claim 1～6, it is characterized in that O:0.001～0.020%.
8. as the arbitrary described Glassed Steel of claim 1～7, it is characterized in that Cu/P:1～5.
9. as the manufacture method of the arbitrary described Glassed Steel of claim 1～8, comprising:
Smelting also, continuous casting becomes steel billet;
The hot rolling heating and temperature control is at 1100～1250 ℃, and finishing temperature is controlled at 700～950 ℃; Coiling temperature is controlled at 550～750 ℃;
Cold rolling draft is more than 60%;
Carry out continuous annealing or bell-type annealing after cold rolling, annealing temperature is 650～900 ℃, and annealing time is 1 minute～20 hours.
10. method as claimed in claim 9 is characterized in that, cold rolling draft is 60～80%.
11., it is characterized in that, also cool off average rate of cooling≤50 ℃/s after the hot rolling as claim 9 or 10 described methods.
12. method as claimed in claim 11 is characterized in that, average rate of cooling is 5～25 ℃/s.
13., it is characterized in that when adopting continuous annealing, annealing time is 1～10 minute as the arbitrary described method of claim 9～12; When adopting bell-type annealing, annealing time is 15～20 hours.
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Application publication date: 20111123 |