CN104651728A - Anticorrosion steel sheet for storing equipment and preparation method of steel sheet - Google Patents
Anticorrosion steel sheet for storing equipment and preparation method of steel sheet Download PDFInfo
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Abstract
The invention discloses an anticorrosion steel sheet for storing equipment; an anticorrosion coating is sprayed on the surface of the steel sheet, wherein the steel sheet consists of the following components in percentage by mass: 0.36-0.38% of C, 0.45-0.47% of Mn, 0.07-0.09% of Si, 0.006-0.008% of P, 0.002-0.005% of S, 0.07-0.09% of V, 0.05-0.07% of Ti, 0.08-0.1% of Al, less than or equal to 0.006% of N, less than or equal to 0.00020% of H, 0.012-0.015% of Cu, 0.58-0.72% of Cr, 0.23-0.25% of Mo, 0.23-0.25% of rare-earth trace elements and the balance of Fe and inevitable impurities. The steel sheet disclosed by the invention is strong in anticorrosion performance, transverse yield strength is more than or equal to 230MPa, and the steel sheet has high plasticity and excellent low-temperature ductility.
Description
Technical field
The present invention relates to a kind of steel plate and preparation method thereof, specifically a kind of anticorrosion steel plate for storage facilities and preparation method thereof.
Background technology
Storage facilities refers to the technique device and facility that can meet storage and custody articles needs, and storage facilities is stored in a warehouse and logistlcs technology level item key just, and modern storage facilities embodies the development of modern storage and logistlcs technology.Shelf in storage facilities are the equipment relatively commonly used, needs are deposited due to special material, working conditions and the environment of shelf are more and more harsher, more and more thicker to the thickness requirement of steel plate, correspondingly also improve constantly the technical requirements of the steel plate for storage facilities.Especially for when depositing some perishable goods, usually can cause storage facilities just fracture at short notice because of being corroded of steel plate, add warehouse cost; And in some cold districts, the low-temperature flexibility in the steel plate of shelf load-bearing is not high yet, storage facilities just fracture at short notice also often can be caused.Therefore the anticorrosive and transverse yield strength how effectively improving the steel plate being used for storage facilities is those skilled in the art's technical issues that need to address always.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind of anticorrosion steel plate for storage facilities and preparation method thereof, has strong corrosion resistance, transverse yield strength >=220 MPa, high-ductility, and have excellent low temperature toughness.
The technical scheme that the present invention solves above technical problem is: provide a kind of anticorrosion steel plate for storage facilities, the surface spraying of described steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.36-0.38%, Mn:0.45-0.47%, Si:0.07-0.09%, P:0.006-0.008%, S:0.002-0.005%, V:0.07-0.09%, Ti:0.05-0.07%, Al:0.08-0.1%, N≤0.006%, H≤0.00020%, Cu:0.012-0.015%, Cr:0.58-0.72%, Mo:0.23-0.25%, rare earth microelement: 0.23-0.25%, surplus is Fe and inevitable impurity,
In this steel plate, first-phase is ferrite, and second-phase is perlite, and at thickness place, surface to 1/4, second-phase percent by volume is 3.2-3.5%, and 1/4 thickness is 7.4-7.8% to center second-phase percent by volume, and without banded structure;
This steel plate is 5.2-5.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8-4.1 μm, and 1/4 thickness is 5.7-6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.8-8.1 μm;
Described corrosion-resistant coating is combined by the mixture B of weight percent to be the mixture A of 45-55% and weight percent be 45-55%;
The moiety of described mixture A is counted by weight: zinc powder: 15-17 part, epoxy resin: 44-47 part, silicon carbide: 17-19 part, polyvinyl butyral acetal: 2-4 part, alkylphenol polyoxyethylene: 3-5 part, p-Xylol: 13-15 part, Trimethyllaurylammonium bromide: 4-6 part;
The moiety of described mixture B is counted by weight: vibrin: 10-15 part, epoxy resin: 31-33 part, silicon-dioxide: 7-9 part, polyacrylamide: 3-6 part, methacrylic acid: 14-17 part, polyurethane prepolymer: 2-6 part.
For the preparation method of the anticorrosion steel plate of storage facilities, comprise following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1310-1330 DEG C, entrance finishing temperature is 960-980 DEG C, finishing temperature is 770-790 DEG C, after hot rolling with adopt water-cooled with the rate of cooling of 6-8 DEG C/s by slab water-cooled to 310-330 DEG C, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 1-3 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1350-1370 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1170-1190 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 550-570 DEG C online, then be cooled to normal temperature by the second process for cooling; First refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 5-9 DEG C/s by steel plate water-cooled to 970-990 DEG C, then adopt the rate of cooling of water-cooled 7-9 DEG C/s that slab is chilled to 690-710 DEG C, then adopt aerosol to cool steel plate water-cooled with the rate of cooling of 1-3 DEG C/s to 550-570 DEG C; Second refrigerating work procedure: adopt water-cooled is combined with pressure-air cooling, first employing water-cooled with the rate of cooling of 6-8 DEG C/s by steel plate water-cooled to 350-370 DEG C, employing pressurized air with the rate of cooling of 2-4 DEG C/s, steel plate is chilled to room temperature; Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.1-3.3%, and 1/4 thickness is 7.3-7.5% to center second-phase percent by volume, and without banded structure;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 80-150m/min, per tooth feeding 0.1-0.15mm/z, metal removal rate≤17.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 25-30 ° of obliquity, and firmly evenly, coating thickness is 1.8-3.6mm.
The technical scheme that the present invention limits further is:
The aforesaid anticorrosion steel plate for storage facilities, the surface spraying of this steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.36%, Mn:0.45%, Si:0.07%, P:0.006%, S:0.002%, V:0.07%, Ti:0.05%, Al:0.08%, N:0.005%, H:0.00020%, Cu:0.012%, Cr:0.58%, Mo:0.23%, rare earth microelement: 0.23%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.2%, 1/4 thickness is 7.4% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure; This steel plate is 5.2 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8 μm, and 1/4 thickness is 5.7 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.8 μm;
Described corrosion-resistant coating by weight percent be 45% mixture A and weight percent be 55% mixture B combine; The moiety of described mixture A is counted by weight: zinc powder: 15 parts, epoxy resin: 44 parts, silicon carbide: 17 parts, polyvinyl butyral acetal: 2 parts, alkylphenol polyoxyethylene: 3 parts, p-Xylol: 13 parts, Trimethyllaurylammonium bromide: 4 parts; The moiety of described mixture B is counted by weight: vibrin: 10 parts, epoxy resin: 31 parts, silicon-dioxide: 7 parts, polyacrylamide: 3 parts, methacrylic acid: 14 parts, polyurethane prepolymer: 2 parts.
The front preparation method for the anticorrosion steel plate of storage facilities, comprises following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1310 DEG C, entrance finishing temperature is 960 DEG C, finishing temperature is 770 DEG C, to adopt water-cooled with the rate of cooling of 6 DEG C/s by slab water-cooled to 310 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 1 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1350 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1170 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 550 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 5 DEG C/s by steel plate water-cooled to 970 DEG C, then adopt the rate of cooling of water-cooled 7 DEG C/s that slab is chilled to 690 DEG C, then adopt aerosol to cool steel plate water-cooled to 550 DEG C with the rate of cooling of 1 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 6 DEG C/s by steel plate water-cooled to 350 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 2 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.1%, 1/4 thickness is 7.3% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.5 μm, and pearlite colony mean diameter is 4.0 μm, and 1/4 thickness is 6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.0 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 80m/min, per tooth feeding 0.1mm/z, metal removal rate 17.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 25 ° of obliquitys, and firmly evenly, coating thickness is 1.8mm.
The aforesaid anticorrosion steel plate for storage facilities, the surface spraying of this steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.37%, Mn:0.46%, Si:0.08%, P:0.008%, S:0.004%, V:0.08%, Ti:0.06%, Al:0.09%, N:0.056%, H:0.00017%, Cu:0.014%, Cr:0.65%, Mo:0.24%, rare earth microelement: 0.24%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.4%, 1/4 thickness is 7.5% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure; This steel plate is 5.4 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.9 μm, and 1/4 thickness is 5.9 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.9 μm;
Described corrosion-resistant coating by weight percent be 50% mixture A and weight percent be 50% mixture B combine; The moiety of described mixture A is counted by weight: zinc powder: 16 parts, epoxy resin: 46 parts, silicon carbide: 18 parts, polyvinyl butyral acetal: 3 parts, alkylphenol polyoxyethylene: 4 parts, p-Xylol: 14 parts, Trimethyllaurylammonium bromide: 5 parts; The moiety of described mixture B is counted by weight: vibrin: 11 parts, epoxy resin: 32 parts, silicon-dioxide: 8 parts, polyacrylamide: 4 parts, methacrylic acid: 16 parts, polyurethane prepolymer: 5 parts.
The preparation method of the aforesaid anticorrosion steel plate for storage facilities, comprises following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1320 DEG C, entrance finishing temperature is 970 DEG C, finishing temperature is 780 DEG C, to adopt water-cooled with the rate of cooling of 7 DEG C/s by slab water-cooled to 320 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 23 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1360 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1180 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 560 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 7 DEG C/s by steel plate water-cooled to 980 DEG C, then adopt the rate of cooling of water-cooled 8 DEG C/s that slab is chilled to 700 DEG C, then adopt aerosol to cool steel plate water-cooled to 560 DEG C with the rate of cooling of 2 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 7 DEG C/s by steel plate water-cooled to 360 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 3 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.2%, 1/4 thickness is 7.4% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.6 μm, and pearlite colony mean diameter is 4.1 μm, and 1/4 thickness is 6.1 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.1 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 100m/min, per tooth feeding 0.12mm/z, metal removal rate: 16.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 28 ° of obliquitys, and firmly evenly, coating thickness is 2.6mm.
The aforesaid anticorrosion steel plate for storage facilities, the surface spraying of this steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.38%, Mn:0.47%, Si:0.09%, P:0.008%, S:0.005%, V:0.09%, Ti:0.07%, Al:0.1%, N:0.006%, H:0.00020%, Cu:0.015%, Cr:0.72%, Mo:0.25%, rare earth microelement: 0.25%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.5%, 1/4 thickness is 7.8% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure; This steel plate is 5.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 4.1 μm, and 1/4 thickness is 6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.1 μm;
Described corrosion-resistant coating by weight percent be 55% mixture A and weight percent be 45% mixture B combine; The moiety of described mixture A is counted by weight: zinc powder: 17 parts, epoxy resin: 47 parts, silicon carbide: 19 parts, polyvinyl butyral acetal: 4 parts, alkylphenol polyoxyethylene: 5 parts, p-Xylol: 15 parts, Trimethyllaurylammonium bromide: 6 parts; The moiety of described mixture B is counted by weight: vibrin: 15 parts, epoxy resin: 33 parts, silicon-dioxide: 9 parts, polyacrylamide: 6 parts, methacrylic acid: 17 parts, polyurethane prepolymer: 6 parts.
Further, the preparation method of the aforementioned anticorrosion steel plate for storage facilities, comprises following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1330 DEG C, entrance finishing temperature is 980 DEG C, finishing temperature is 790 DEG C, to adopt water-cooled with the rate of cooling of 8 DEG C/s by slab water-cooled to 330 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 3 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1370 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1190 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 570 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 9 DEG C/s by steel plate water-cooled to 990 DEG C, then adopt the rate of cooling of water-cooled 9 DEG C/s that slab is chilled to 710 DEG C, then adopt aerosol to cool steel plate water-cooled to 570 DEG C with the rate of cooling of 3 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 8 DEG C/s by steel plate water-cooled to 370 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 4 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.3%, 1/4 thickness is 7.5% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.7 μm, and pearlite colony mean diameter is 4.2 μm, and 1/4 thickness is 6.2 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.2 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 150m/min, per tooth feeding 0.15mm/z, metal removal rate: 15.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 20 ° of obliquitys, and firmly evenly, coating thickness is 3.6mm.
The invention has the beneficial effects as follows:
Al and V in composition of steel of the present invention, the effect that the control of Ti, Cu, Cr and Mo content is played are: steel plate of the present invention, containing C, Si, Mn element, adds Al and V, Ti, Cu, Cr and Mo can refined crystalline strengthening and precipitation strengths, and with low cost; And by controlling Molten Steel Cleanliness in conjunction with LF, RH, continuous casting process, adopt two-stage controlled rolling, the cold and process of thermal treatment of ACC control can obtain ferrite and add pearlitic structure, successfully produce the antiacid steel plate of normalizing, steel plate has good obdurability and Antacid effectiveness.
The effect that the control of thermomechanical controlled rolling and controlled cooling technique of the present invention and thermal treatment process is played is: thick steel plates differs greatly in operation of rolling light plate Deformation in thickness amount, speed of cooling along plate thickness in process of cooling differs greatly, thus cause changing greatly along the Ferrite Grain Size of thickness x cross sectional, volume fraction, easily form banded structure in central zone; Because surface of steel plate distortion is higher than heart portion, and cooling rate is higher than heart portion, and Ferrite Grain Size is increased to center gradually by surface, and perlite volume fraction is increased gradually by centripetal portion, surface; The present invention passes through the control of thermomechanical controlled rolling and controlled cooling technique and thermal treatment process, obtain the perlite of rational two-phase when fine ferrite and Dispersed precipitate, avoid the formation of banded structure, occur without banded structure, improve Antacid effectiveness, thickness directional properties and low-temperature flexibility, thus be reached through the object that microtexture controls effectively to improve steel plate Antacid effectiveness.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited thereto.
embodiment 1
The present embodiment is a kind of anticorrosion steel plate for storage facilities, the surface spraying of this steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.36%, Mn:0.45%, Si:0.07%, P:0.006%, S:0.002%, V:0.07%, Ti:0.05%, Al:0.08%, N:0.005%, H:0.00020%, Cu:0.012%, Cr:0.58%, Mo:0.23%, rare earth microelement: 0.23%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.2%, 1/4 thickness is 7.4% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure; This steel plate is 5.2 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8 μm, and 1/4 thickness is 5.7 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.8 μm;
Described corrosion-resistant coating by weight percent be 45% mixture A and weight percent be 55% mixture B combine; The moiety of described mixture A is counted by weight: zinc powder: 15 parts, epoxy resin: 44 parts, silicon carbide: 17 parts, polyvinyl butyral acetal: 2 parts, alkylphenol polyoxyethylene: 3 parts, p-Xylol: 13 parts, Trimethyllaurylammonium bromide: 4 parts; The moiety of described mixture B is counted by weight: vibrin: 10 parts, epoxy resin: 31 parts, silicon-dioxide: 7 parts, polyacrylamide: 3 parts, methacrylic acid: 14 parts, polyurethane prepolymer: 2 parts.
The front preparation method for the anticorrosion steel plate of storage facilities, comprises following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1310 DEG C, entrance finishing temperature is 960 DEG C, finishing temperature is 770 DEG C, to adopt water-cooled with the rate of cooling of 6 DEG C/s by slab water-cooled to 310 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 1 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1350 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1170 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 550 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 5 DEG C/s by steel plate water-cooled to 970 DEG C, then adopt the rate of cooling of water-cooled 7 DEG C/s that slab is chilled to 690 DEG C, then adopt aerosol to cool steel plate water-cooled to 550 DEG C with the rate of cooling of 1 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 6 DEG C/s by steel plate water-cooled to 350 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 2 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.1%, 1/4 thickness is 7.3% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.5 μm, and pearlite colony mean diameter is 4.0 μm, and 1/4 thickness is 6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.0 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 80m/min, per tooth feeding 0.1mm/z, metal removal rate 17.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 25 ° of obliquitys, and firmly evenly, coating thickness is 1.8mm.
embodiment 2
The present embodiment is a kind of anticorrosion steel plate for storage facilities, the surface spraying of this steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.37%, Mn:0.46%, Si:0.08%, P:0.008%, S:0.004%, V:0.08%, Ti:0.06%, Al:0.09%, N:0.056%, H:0.00017%, Cu:0.014%, Cr:0.65%, Mo:0.24%, rare earth microelement: 0.24%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.4%, 1/4 thickness is 7.5% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure; This steel plate is 5.4 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.9 μm, and 1/4 thickness is 5.9 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.9 μm;
Described corrosion-resistant coating by weight percent be 50% mixture A and weight percent be 50% mixture B combine; The moiety of described mixture A is counted by weight: zinc powder: 16 parts, epoxy resin: 46 parts, silicon carbide: 18 parts, polyvinyl butyral acetal: 3 parts, alkylphenol polyoxyethylene: 4 parts, p-Xylol: 14 parts, Trimethyllaurylammonium bromide: 5 parts; The moiety of described mixture B is counted by weight: vibrin: 11 parts, epoxy resin: 32 parts, silicon-dioxide: 8 parts, polyacrylamide: 4 parts, methacrylic acid: 16 parts, polyurethane prepolymer: 5 parts.
The preparation method of the aforesaid anticorrosion steel plate for storage facilities, comprises following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1320 DEG C, entrance finishing temperature is 970 DEG C, finishing temperature is 780 DEG C, to adopt water-cooled with the rate of cooling of 7 DEG C/s by slab water-cooled to 320 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 23 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1360 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1180 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 560 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 7 DEG C/s by steel plate water-cooled to 980 DEG C, then adopt the rate of cooling of water-cooled 8 DEG C/s that slab is chilled to 700 DEG C, then adopt aerosol to cool steel plate water-cooled to 560 DEG C with the rate of cooling of 2 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 7 DEG C/s by steel plate water-cooled to 360 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 3 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.2%, 1/4 thickness is 7.4% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.6 μm, and pearlite colony mean diameter is 4.1 μm, and 1/4 thickness is 6.1 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.1 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 100m/min, per tooth feeding 0.12mm/z, metal removal rate: 16.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 28 ° of obliquitys, and firmly evenly, coating thickness is 2.6mm.
embodiment 3
The present embodiment is a kind of anticorrosion steel plate for storage facilities, the surface spraying of this steel plate has corrosion-resistant coating, the composition of this steel plate and mass percent are: C:0.38%, Mn:0.47%, Si:0.09%, P:0.008%, S:0.005%, V:0.09%, Ti:0.07%, Al:0.1%, N:0.006%, H:0.00020%, Cu:0.015%, Cr:0.72%, Mo:0.25%, rare earth microelement: 0.25%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.5%, 1/4 thickness is 7.8% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure; This steel plate is 5.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 4.1 μm, and 1/4 thickness is 6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.1 μm;
Described corrosion-resistant coating by weight percent be 55% mixture A and weight percent be 45% mixture B combine; The moiety of described mixture A is counted by weight: zinc powder: 17 parts, epoxy resin: 47 parts, silicon carbide: 19 parts, polyvinyl butyral acetal: 4 parts, alkylphenol polyoxyethylene: 5 parts, p-Xylol: 15 parts, Trimethyllaurylammonium bromide: 6 parts; The moiety of described mixture B is counted by weight: vibrin: 15 parts, epoxy resin: 33 parts, silicon-dioxide: 9 parts, polyacrylamide: 6 parts, methacrylic acid: 17 parts, polyurethane prepolymer: 6 parts.
Further, the preparation method of the aforementioned anticorrosion steel plate for storage facilities, comprises following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1330 DEG C, entrance finishing temperature is 980 DEG C, finishing temperature is 790 DEG C, to adopt water-cooled with the rate of cooling of 8 DEG C/s by slab water-cooled to 330 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 3 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1370 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1190 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 570 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 9 DEG C/s by steel plate water-cooled to 990 DEG C, then adopt the rate of cooling of water-cooled 9 DEG C/s that slab is chilled to 710 DEG C, then adopt aerosol to cool steel plate water-cooled to 570 DEG C with the rate of cooling of 3 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 8 DEG C/s by steel plate water-cooled to 370 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 4 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.3%, 1/4 thickness is 7.5% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.7 μm, and pearlite colony mean diameter is 4.2 μm, and 1/4 thickness is 6.2 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.2 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 150m/min, per tooth feeding 0.15mm/z, metal removal rate: 15.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 20 ° of obliquitys, and firmly evenly, coating thickness is 3.6mm.
The performance of each embodiment steel plate is as shown in table 1.
The performance of each embodiment steel plate of table 1
As seen from the above table, steel grade steel of the present invention is pure, has good intensity, plasticity and low-temperature flexibility, Properties of HIC resistance and anti-SSC performance.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of application claims.
Claims (8)
1. the anticorrosion steel plate for storage facilities, the surface spraying of described steel plate has corrosion-resistant coating, it is characterized in that: the composition of this steel plate and mass percent are: C:0.36-0.38%, Mn:0.45-0.47%, Si:0.07-0.09%, P:0.006-0.008%, S:0.002-0.005%, V:0.07-0.09%, Ti:0.05-0.07%, Al:0.08-0.1%, N≤0.006%, H≤0.00020%, Cu:0.012-0.015%, Cr:0.58-0.72%, Mo:0.23-0.25%, rare earth microelement: 0.23-0.25%, surplus is Fe and inevitable impurity,
In this steel plate, first-phase is ferrite, and second-phase is perlite, and at thickness place, surface to 1/4, second-phase percent by volume is 3.2-3.5%, and 1/4 thickness is 7.4-7.8% to center second-phase percent by volume, and without banded structure;
This steel plate is 5.2-5.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8-4.1 μm, and 1/4 thickness is 5.7-6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.8-8.1 μm;
Described corrosion-resistant coating is combined by the mixture B of weight percent to be the mixture A of 45-55% and weight percent be 45-55%;
The moiety of described mixture A is counted by weight: zinc powder: 15-17 part, epoxy resin: 44-47 part, silicon carbide: 17-19 part, polyvinyl butyral acetal: 2-4 part, alkylphenol polyoxyethylene: 3-5 part, p-Xylol: 13-15 part, Trimethyllaurylammonium bromide: 4-6 part;
The moiety of described mixture B is counted by weight: vibrin: 10-15 part, epoxy resin: 31-33 part, silicon-dioxide: 7-9 part, polyacrylamide: 3-6 part, methacrylic acid: 14-17 part, polyurethane prepolymer: 2-6 part.
2. as claimed in claim 1 for the anticorrosion steel plate of storage facilities, it is characterized in that: the composition of this steel plate and mass percent are: C:0.36%, Mn:0.45%, Si:0.07%, P:0.006%, S:0.002%, V:0.07%, Ti:0.05%, Al:0.08%, N:0.005%, H:0.00020%, Cu:0.012%, Cr:0.58%, Mo:0.23%, rare earth microelement: 0.23%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.2%, 1/4 thickness is 7.4% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure;
This steel plate is 5.2 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.8 μm, and 1/4 thickness is 5.7 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.8 μm;
Described corrosion-resistant coating by weight percent be 45% mixture A and weight percent be 55% mixture B combine;
The moiety of described mixture A is counted by weight: zinc powder: 15 parts, epoxy resin: 44 parts, silicon carbide: 17 parts, polyvinyl butyral acetal: 2 parts, alkylphenol polyoxyethylene: 3 parts, p-Xylol: 13 parts, Trimethyllaurylammonium bromide: 4 parts;
The moiety of described mixture B is counted by weight: vibrin: 10 parts, epoxy resin: 31 parts, silicon-dioxide: 7 parts, polyacrylamide: 3 parts, methacrylic acid: 14 parts, polyurethane prepolymer: 2 parts.
3. as claimed in claim 1 for the anticorrosion steel plate of storage facilities, it is characterized in that: the composition of this steel plate and mass percent are: C:0.37%, Mn:0.46%, Si:0.08%, P:0.008%, S:0.004%, V:0.08%, Ti:0.06%, Al:0.09%, N:0.056%, H:0.00017%, Cu:0.014%, Cr:0.65%, Mo:0.24%, rare earth microelement: 0.24%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.4%, 1/4 thickness is 7.5% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure;
This steel plate is 5.4 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 3.9 μm, and 1/4 thickness is 5.9 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 7.9 μm;
Described corrosion-resistant coating by weight percent be 50% mixture A and weight percent be 50% mixture B combine;
The moiety of described mixture A is counted by weight: zinc powder: 16 parts, epoxy resin: 46 parts, silicon carbide: 18 parts, polyvinyl butyral acetal: 3 parts, alkylphenol polyoxyethylene: 4 parts, p-Xylol: 14 parts, Trimethyllaurylammonium bromide: 5 parts;
The moiety of described mixture B is counted by weight: vibrin: 11 parts, epoxy resin: 32 parts, silicon-dioxide: 8 parts, polyacrylamide: 4 parts, methacrylic acid: 16 parts, polyurethane prepolymer: 5 parts.
4. as claimed in claim 1 for the anticorrosion steel plate of storage facilities, it is characterized in that: the composition of this steel plate and mass percent are: C:0.38%, Mn:0.47%, Si:0.09%, P:0.008%, S:0.005%, V:0.09%, Ti:0.07%, Al:0.1%, N:0.006%, H:0.00020%, Cu:0.015%, Cr:0.72%, Mo:0.25%, rare earth microelement: 0.25%, surplus is Fe and inevitable impurity;
In this steel plate, first-phase is ferrite, and second-phase is perlite, be 3.5%, 1/4 thickness is 7.8% to center second-phase percent by volume in thickness place, surface to 1/4 second-phase percent by volume, and without banded structure;
This steel plate is 5.5 μm at thickness place, surface to 1/4 ferrite average crystal grain diameter, and pearlite colony mean diameter is 4.1 μm, and 1/4 thickness is 6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.1 μm;
Described corrosion-resistant coating by weight percent be 55% mixture A and weight percent be 45% mixture B combine;
The moiety of described mixture A is counted by weight: zinc powder: 17 parts, epoxy resin: 47 parts, silicon carbide: 19 parts, polyvinyl butyral acetal: 4 parts, alkylphenol polyoxyethylene: 5 parts, p-Xylol: 15 parts, Trimethyllaurylammonium bromide: 6 parts;
The moiety of described mixture B is counted by weight: vibrin: 15 parts, epoxy resin: 33 parts, silicon-dioxide: 9 parts, polyacrylamide: 6 parts, methacrylic acid: 17 parts, polyurethane prepolymer: 6 parts.
5. the preparation method of the anticorrosion steel plate for storage facilities as described in claim arbitrary in claim 1-4, is characterized in that: comprise following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1310-1330 DEG C, entrance finishing temperature is 960-980 DEG C, finishing temperature is 770-790 DEG C, adopt after hot rolling water-cooled with the rate of cooling of 6-8 DEG C/s by slab water-cooled to 310-330 DEG C, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 1-3 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1350-1370 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1170-1190 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 550-570 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 5-9 DEG C/s by steel plate water-cooled to 970-990 DEG C, then adopt the rate of cooling of water-cooled 7-9 DEG C/s that slab is chilled to 690-710 DEG C, then adopt aerosol to cool steel plate water-cooled with the rate of cooling of 1-3 DEG C/s to 550-570 DEG C;
Described second refrigerating work procedure: adopt water-cooled is combined with pressure-air cooling, first employing water-cooled with the rate of cooling of 6-8 DEG C/s by steel plate water-cooled to 350-370 DEG C, employing pressurized air with the rate of cooling of 2-4 DEG C/s, steel plate is chilled to room temperature;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.1-3.3%, 1/4 thickness is 7.3-7.5% to center second-phase percent by volume, and without banded structure;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 80-150m/min, per tooth feeding 0.1-0.15mm/z, metal removal rate≤17.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 25-30 ° of obliquity, and firmly evenly, coating thickness is 1.8-3.6mm.
6., as claimed in claim 5 for the preparation method of the anticorrosion steel plate of storage facilities, it is characterized in that: comprise following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1310 DEG C, entrance finishing temperature is 960 DEG C, finishing temperature is 770 DEG C, to adopt water-cooled with the rate of cooling of 6 DEG C/s by slab water-cooled to 310 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 1 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1350 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1170 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 550 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 5 DEG C/s by steel plate water-cooled to 970 DEG C, then adopt the rate of cooling of water-cooled 7 DEG C/s that slab is chilled to 690 DEG C, then adopt aerosol to cool steel plate water-cooled to 550 DEG C with the rate of cooling of 1 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 6 DEG C/s by steel plate water-cooled to 350 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 2 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.1%, 1/4 thickness is 7.3% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.5 μm, and pearlite colony mean diameter is 4.0 μm, and 1/4 thickness is 6.0 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.0 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 80m/min, per tooth feeding 0.1mm/z, metal removal rate 17.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 25 ° of obliquitys, and firmly evenly, coating thickness is 1.8mm.
7., as claimed in claim 5 for the preparation method of the anticorrosion steel plate of storage facilities, it is characterized in that: comprise following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1320 DEG C, entrance finishing temperature is 970 DEG C, finishing temperature is 780 DEG C, to adopt water-cooled with the rate of cooling of 7 DEG C/s by slab water-cooled to 320 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 23 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1360 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1180 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 560 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 7 DEG C/s by steel plate water-cooled to 980 DEG C, then adopt the rate of cooling of water-cooled 8 DEG C/s that slab is chilled to 700 DEG C, then adopt aerosol to cool steel plate water-cooled to 560 DEG C with the rate of cooling of 2 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 7 DEG C/s by steel plate water-cooled to 360 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 3 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.2%, 1/4 thickness is 7.4% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.6 μm, and pearlite colony mean diameter is 4.1 μm, and 1/4 thickness is 6.1 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.1 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 100m/min, per tooth feeding 0.12mm/z, metal removal rate: 16.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 28 ° of obliquitys, and firmly evenly, coating thickness is 2.6mm.
8., as claimed in claim 5 for the preparation method of the anticorrosion steel plate of storage facilities, it is characterized in that: comprise following steps:
(i) the slab smelted by component requirements is prepared steel plate through thermomechanical controlled rolling and controlled cooling technique:
Roughing finishing temperature is 1330 DEG C, entrance finishing temperature is 980 DEG C, finishing temperature is 790 DEG C, to adopt water-cooled with the rate of cooling of 8 DEG C/s by slab water-cooled to 330 DEG C after hot rolling, adopt pressurized air or vaporific hardening liquid, with the rate of cooling of 3 DEG C/s, slab is chilled to room temperature again, thus obtain the perlite of fine ferrite and Dispersed precipitate, and without banded structure;
(ii) steel plate hot process:
Steel plate is heated to 1370 DEG C by tempering stove tempering, after coming out of the stove, is cooled fast to 1190 DEG C by pressurized air, through the first refrigerating work procedure, steel plate fast speed is cooled to 570 DEG C online, then be cooled to normal temperature by the second process for cooling;
Described first refrigerating work procedure: adopt air-cooled, water-cooled and aerosol to cool and combine, first adopt air-cooled with the rate of cooling of 9 DEG C/s by steel plate water-cooled to 990 DEG C, then adopt the rate of cooling of water-cooled 9 DEG C/s that slab is chilled to 710 DEG C, then adopt aerosol to cool steel plate water-cooled to 570 DEG C with the rate of cooling of 3 DEG C/s;
Described second refrigerating work procedure: adopt water-cooled to be combined with pressure-air cooling, first adopts water-cooled with the rate of cooling of 8 DEG C/s by steel plate water-cooled to 370 DEG C, and steel plate is chilled to room temperature with the rate of cooling of 4 DEG C/s by employing pressurized air;
Reasonable two fine ferrite compared and perlite are obtained by above thermomechanical controlled rolling and controlled cooling technique and thermal treatment, at thickness place, surface to 1/4, second-phase percent by volume is 3.3%, 1/4 thickness is 7.5% to center second-phase percent by volume, and without banded structure; At thickness place, surface to 1/4, ferrite average crystal grain diameter is 5.7 μm, and pearlite colony mean diameter is 4.2 μm, and 1/4 thickness is 6.2 μm to center ferrite average crystal grain diameter, and pearlite colony mean diameter is 8.2 μm;
(iii) Milling Process technique:
Milling Process is set for forward milling, adds and do not adopt cutting fluid man-hour, cutting speed 150m/min, per tooth feeding 0.15mm/z, metal removal rate: 15.2cm
3/ min, detects milling surface quality, surfaceness: 1.34 < Ra < 2.41, surface size error: ± 0.05, chip breaking length: 2-3mm;
(iv) corrosion-resistant coating coating:
During coating, coated tool and steel plate sheet material material keep 20 ° of obliquitys, and firmly evenly, coating thickness is 3.6mm.
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