CN112877632A - Aluminum-silicon plated steel plate for high-plasticity hot stamping forming and hot stamping method thereof - Google Patents
Aluminum-silicon plated steel plate for high-plasticity hot stamping forming and hot stamping method thereof Download PDFInfo
- Publication number
- CN112877632A CN112877632A CN202110035515.5A CN202110035515A CN112877632A CN 112877632 A CN112877632 A CN 112877632A CN 202110035515 A CN202110035515 A CN 202110035515A CN 112877632 A CN112877632 A CN 112877632A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- hot
- aluminum
- percent
- silicon
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 104
- 239000010959 steel Substances 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 40
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000007747 plating Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 238000005261 decarburization Methods 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 9
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000000137 annealing Methods 0.000 claims description 7
- 238000003618 dip coating Methods 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 239000010960 cold rolled steel Substances 0.000 claims description 6
- 229910000734 martensite Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910001566 austenite Inorganic materials 0.000 claims description 5
- 238000005098 hot rolling Methods 0.000 claims description 5
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 229910000859 α-Fe Inorganic materials 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 230000000717 retained effect Effects 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052698 phosphorus Inorganic materials 0.000 claims description 2
- 229910052702 rhenium Inorganic materials 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 229910018125 Al-Si Inorganic materials 0.000 claims 1
- 229910018520 Al—Si Inorganic materials 0.000 claims 1
- 238000000465 moulding Methods 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 229910000976 Electrical steel Inorganic materials 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 239000010936 titanium Substances 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- 230000002776 aggregation Effects 0.000 description 5
- 238000004220 aggregation Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- CYUOWZRAOZFACA-UHFFFAOYSA-N aluminum iron Chemical compound [Al].[Fe] CYUOWZRAOZFACA-UHFFFAOYSA-N 0.000 description 1
- -1 and in addition Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
- C23C2/12—Aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/40—Plates; Strips
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention discloses an aluminum-silicon plated steel plate for high-plasticity hot stamping forming and a hot stamping method thereof, which solve the problem of plasticity reduction caused by subsurface carbon enrichment caused by the reaction of a plating layer and a steel matrix in the hot stamping forming process of a conventional aluminum-plated silicon steel plate, and the surface of a substrate is subjected to decarburization treatment before hot dipping of aluminum and silicon to obtain a decarburized layer of 2-100 microns on the surface of the substrate. The hot-press formed steel plate produced by the method can provide good protection for the steel plate in the processes of heating, heat preservation and stamping and the subsequent use process, and the steel plate has excellent plasticity after being subjected to punch forming, so that the plasticity and toughness of the hot-press formed part are greatly improved, and the collision safety of the part is improved.
Description
Technical Field
The present invention relates to an aluminum-silicon-plated steel sheet for hot forming, and more particularly to an aluminum-silicon-plated steel sheet having high plasticity and applied to hot press forming, a method for manufacturing the same, and a method for hot press forming of the aluminum-silicon-plated steel sheet.
Background
The continuous reduction of the fuel consumption index of a hundred kilometers of the automobile forces automobile manufacturers to only continuously reduce the self weight of the automobile. The most effective way to reduce the self-weight of the car is to use light materials or high-strength materials, and high-strength steel is the first choice in consideration of cost and safety. High-strength steel, after having reached a certain degree of strength, makes forming very difficult, and hot press forming methods have been increasingly used in recent years.
The conventional thermal forming process comprises the following steps: firstly, heating a hot-press forming steel plate with lower strength at normal temperature to 880-950 ℃ to enable the hot-press forming steel plate to be austenitized uniformly, then sending the hot-press forming steel plate into a die with a cooling system inside to be subjected to punch forming, and simultaneously cooling and quenching quickly to convert austenite into martensite so that the stamped part is hardened and the strength is greatly improved. This process is known as the "press hardening" technique. In actual production, the hot stamping process is divided into a direct process and an indirect process, wherein the direct process is to directly heat and punch the steel plate after blanking, and is mainly used for workpieces with simple shapes and small deformation degree; for workpieces with complex shapes or large drawing depths, an indirect process is needed, namely, a steel plate which is fed well is preformed, and then the steel plate is heated and hot stamped.
The existing hot forming process causes the steel plate to be exposed in the air during the heating, heat preservation and subsequent stamping and cooling processes of the whole part, and serious oxidation is generated. In order to protect steel plates, a commonly used method is to plate a protective metal coating on the surface of the steel plate, and most commonly, to plate aluminum.
However, in recent years, it has been found that the ductility and toughness of parts are deteriorated by the concentration of C element in the subsurface due to Al — Fe reaction on the surface of the aluminum-plated silicon steel sheet after press forming.
Disclosure of Invention
Aiming at the defects in the prior art and solving the problem of plasticity reduction caused by subsurface carbon enrichment caused by the reaction of a plating layer and a steel matrix in the hot-press forming process of a conventional aluminum-silicon steel plate, the invention provides a novel hot-press formed steel plate with an aluminum-silicon plating layer and a manufacturing method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
the aluminum-silicon coated steel plate for the high-plasticity hot stamping forming comprises a substrate and a coating, and is characterized in that: the substrate is subjected to surface decarburization treatment before hot dip aluminum silicon plating, and a decarburized layer of 2-100 microns is obtained on the surface of the substrate.
The base plate is a hot-rolled steel plate, the surface of the steel plate is subjected to decarburization treatment after rolling and laminar cooling, the steel plate is coiled at 500-750 ℃, the steel coil is in a loose-coil state, and a decarburized layer of 2-100 micrometers is formed on the surface of the steel plate.
The substrate is a cold-rolled steel plate, surface decarburization treatment is simultaneously carried out in the hot-dip coating recrystallization annealing process, the heating temperature of the steel plate is 800-850 ℃, the surface of the steel plate is subjected to oxidizing treatment in the temperature range of 500-800 ℃, and a decarburized layer of 2-50 microns is formed on the surface of the steel plate; and then continuously heating and preserving heat in a reducing atmosphere, and carrying out reduction treatment on the surface to reduce the iron oxide on the surface into pure iron.
The substrate is a cold-rolled steel plate, surface decarburization treatment is carried out after hot rolling, and surface decarburization treatment is not carried out in the hot dip coating recrystallization annealing process.
The substrate comprises the following elements in percentage by mass: 0.15 to 0.60 percent of C, 0.05 to 3.0 percent of Si, 1.10 to 10.50 percent of Mn, less than or equal to 0.05 percent of P, less than or equal to 0.05 percent of S, 0.01 to 3.00 percent of Al, less than or equal to 0.10 percent of Ti, less than or equal to 0.007 percent of B, 0.02 to 0.80 percent of Cr, less than or equal to 0.80 percent of Cu, less than or equal to 0.10 percent of Nb, and one or two of Mo0.02 to 1.50 percent and Ni0.2 to 1.0 percent, Fe and inevitable impurities.
The plating layer comprises the following elements in percentage by mass: si 5-15.0%, one or more of Ti 0.03-0.20%, Re 0.01-0.10%, Mn 0.5-3.0%, Ni 0.5-4.0%, Zr0.5-1.0%, Cr0.1-1.0%, and the balance Al.
The hot rolling process comprises the following steps: heating at 1240 +/-30 ℃, preserving heat for 160-240 minutes, rough rolling at 1100 +/-30 ℃, finish rolling at 1050 +/-30 ℃ and final rolling at 880 +/-30 ℃.
The hot-dip aluminum-silicon plating method comprises the following steps: when the substrate is a hot-rolled steel plate, heating the acid-washed steel plate at 480-600 ℃ in a heating furnace in nitrogen-hydrogen mixed gas, and heating the steel plate in a zinc pot at 630-700 ℃; when the substrate is a cold-rolled steel plate, the steel plate subjected to surface decarburization treatment is directly put into a zinc pot for hot dip coating, and the temperature of the zinc pot is 630-700 ℃.
The hot stamping method comprises the following steps: heating the steel plate to a temperature range of 850-950 ℃, controlling the heating speed to be below 30 ℃/s in the temperature range below 650 ℃, keeping the temperature for 3-15 minutes in the temperature range of 850-950 ℃, and then carrying out hot stamping, wherein the cooling rate in the hot stamping process is more than 20 ℃/s, and the cooling end point temperature is controlled to be 100-350 ℃.
The strength of the steel plate prepared after hot stamping is more than 1500MPa, and the elongation is more than or equal to 8%; the plating layer is completely converted into an iron alloy layer, and the phenomenon of C enrichment on the subsurface is avoided; the steel sheet has a structure of martensite + ferrite + retained austenite.
The surface decarburization treatment in the steel plate hot rolling process is characterized in that oxygen is in contact with the surface of the steel plate and preferentially reacts with C in steel, C atoms in a certain range away from the surface of the steel plate migrate to the surface under the promotion of concentration gradient (chemical potential) along with the consumption of C on the surface of the steel plate, the reaction is continuously carried out, and a decarburized layer of 2-100 micrometers can be formed on the surface of the steel plate. The decarburized layer having a thickness of less than 2 μm does not function to eliminate carbon aggregation, and the decarburized layer having a thickness of more than 100 μm may reduce the overall strength of the steel sheet. The decarburized layer remains after the cold rolling process, but becomes thinner due to the cold rolling reduction. Therefore, the thickness of the decarburized layer of the steel sheet to be cold rolled is increased as appropriate.
The surface decarburization treatment in the continuous annealing process of the steel plate comprises the following steps: in the steel plate recrystallization annealing heating process, oxidizing treatment is carried out on the surface of the steel plate by using oxygen-containing gas at a temperature range of 500-800 ℃. Oxygen contacts the surface of the steel plate, preferentially reacts with C in steel, and moves to the surface from C atoms within a certain range away from the surface of the steel plate under the promotion of concentration gradient (chemical potential) along with the consumption of C on the surface of the steel plate, the reaction is continuously carried out, and a decarburized layer of 2-50 microns can be formed on the surface of the steel plate. The decarburized layer having a thickness of less than 2 μm does not function to eliminate carbon aggregation, and the decarburized layer having a thickness of more than 50 μm may reduce the overall strength of the steel sheet. And then, continuously heating and preserving heat in a reducing atmosphere, and carrying out reduction treatment on the surface, wherein iron oxide on the surface can be reduced into pure iron, so that the subsequent hot dip coating process is facilitated.
The research result of the inventor shows that in the heating process of hot stamping forming, the iron on the surface of the steel plate reacts with the Al element in the coating to generate an aluminum iron intermetallic compound, while the C element on the surface of the steel plate is not consumed to generate C aggregation, and the carbon locally aggregated affects the plasticity and toughness of the part after hot stamping forming.
The inventor researches to show that: the decarburized layer is formed on the surface of the substrate, so that the problem of C aggregation in the hot press forming process after hot dip aluminum silicon plating can be solved, and the existence of the decarburized layer enables the surface of the steel plate to have a layer of ferrite, so that the plasticity and toughness of the formed part are effectively improved.
The inventors have studied and found that a desired decarburized layer thickness can be obtained by subjecting a steel sheet to surface-controlled (temperature and oxygen content controlled) oxidation treatment, and the need for eliminating C agglomeration in hot-formed steel can be satisfied.
The function of elements in the coating:
al: al is a main element of the aluminum-silicon coating and can provide protection for the steel plate in the hot forming process and the formed parts.
Si: si is enriched in the intermetallic compound layer to form a compact inhibition layer structure, the thickness of the alloy layer is reduced, the toughness of the plating layer is improved, the structure of the plating layer can be refined, and the performance of the plating layer is improved.
Ti: the addition of Ti can improve the corrosion resistance of the coating, and in addition, Ti can form a titanium oxide protective film which has strong bonding force with a substrate and good protective performance and can repair damage by itself. And meanwhile, Si and Ti are added, so that a more compact inhibition layer can be generated, and the growth uniformity of the steel plate alloying coating is improved.
Re: improve the corrosion resistance of the plating layer and refine crystal grains.
Mn: improve the corrosion resistance of the plating layer and refine crystal grains.
Ni: improve the corrosion resistance of the plating layer and form an oxide film protective plating layer.
Cr: improve the corrosion resistance of the plating layer and form an oxide film protective plating layer.
Zr: improve the corrosion resistance of the plating layer and form an oxide film protective plating layer.
The function of elements in steel:
c as the main alloying element contributes most to the strength of the quenched martensitic steel, and Mn and Si are the second order. The ratio of Mn/Si is more than 4, so as to ensure that an oxidation film generated in the hot-dip aluminum silicon annealing process of the steel plate does not influence the hot-dip plating performance. Ti, Cr and B are added to ensure hardenability. The addition of Cu improves the corrosion resistance of the steel, thereby preventing the penetration of H and improving the delayed fracture resistance of the steel. The addition of Mo and Nb has the effects of strengthening a steel matrix and refining grains, and the addition of Si and Al can inhibit the formation of cementite.
The aluminum-silicon coated steel plate for hot forming provided by the invention has the yield and tensile strength of more than 1500MPa and the elongation of more than or equal to 8 percent after hot press forming. The problem of subsurface carbon enrichment of the hot-formed aluminum-silicon coated steel plate is perfectly solved, the plasticity and toughness of the formed part are improved, and the collision safety of parts is improved. The steel sheet has a structure of martensite + ferrite + retained austenite.
Detailed Description
The following description is given with reference to specific examples:
examples are shown in the attached tables 1, 2 and 3;
the strength of the steel plate is more than 1500MPa, and the elongation is more than 8%. The problem of subsurface carbon enrichment of the hot-formed aluminum-silicon coated steel plate is solved, the plasticity and toughness of the formed part are improved, and the collision safety of the part is improved. The steel sheet has a structure of martensite + ferrite + retained austenite.
Table 1: examples chemical elemental composition of the coating
| Si | Mn | Ti | Cr | Ni | Zr | Re | Al | |
| 1 | 5.0 | 2.0 | Balance of | |||||
| 2 | 5.5 | 3.5 | Balance of | |||||
| 3 | 6.0 | 1.0 | 3.0 | Balance of | ||||
| 4 | 7.0 | 0.05 | 0.30 | 2.0 | Balance of | |||
| 5 | 8.50 | 0.10 | 0.7 | Balance of | ||||
| 6 | 9.0 | 0.05 | Balance of | |||||
| 7 | 10.0 | Balance of | ||||||
| 8 | 10.50 | 0.07 | Balance of | |||||
| 9 | 11 | 0.80 | 0.50 | 0.10 | Balance of | |||
| 10 | 11.5 | 0.8 | Balance of | |||||
| 11 | 12 | Balance of | ||||||
| 12 | 10.0 | 0.5 | Balance of | |||||
| 13 | 13.0 | 0.80 | Balance of | |||||
| 14 | 14.0 | 0.15 | Balance of |
Table 2: chemical composition of example steels
| C | Si | Mn | P | Al | Ni | Cu | Cr | Mo | B | Nb | Ti | Fe | |
| 1 | 0.16 | 0.45 | 2.5 | 0.010 | 0.80 | 0.5 | 0.005 | 0.05 | Balance of | ||||
| 2 | 0.18 | 2.10 | 1.6 | 0.030 | 0.5 | 0.3 | 0.003 | Balance of | |||||
| 3 | 0.19 | 0.85 | 2.1 | 0.010 | 1.5 | 0.25 | 0.005 | 0.04 | Balance of | ||||
| 4 | 0.22 | 1.25 | 1.8 | 0.005 | 0.03 | 0.6 | Balance of | ||||||
| 5 | 0.28 | 0.90 | 8.5 | 0.010 | 0.04 | 0.5 | Balance of | ||||||
| 6 | 0.37 | 1.30 | 4.0 | 0.007 | 0.1 | 0.8 | 0.05 | Balance of | |||||
| 7 | 0.33 | 0.50 | 3.5 | 0.010 | 2.00 | 0.5 | 0.2 | Balance of | |||||
| 8 | 0.20 | 1.5 | 5.5 | 0.010 | 0.3 | 0.005 | Balance of | ||||||
| 9 | 0.23 | 1.2 | 4.7 | 0.008 | 0.3 | 0.4 | 0.002 | 0.02 | 0.02 | Balance of | |||
| 10 | 0.25 | 0.4 | 1.2 | 0.010 | 2.8 | 0.3 | 0.4 | 0.02 | Balance of | ||||
| 11 | 0.30 | 0.7 | 2.2 | 0.009 | 0.05 | 0.6 | 0.4 | Balance of | |||||
| 12 | 0.40 | 2.50 | 9.0 | 0.010 | 0.03 | 0.8 | Balance of | ||||||
| 13 | 0.50 | 2.8 | 10.0 | 0.008 | 0.04 | Balance of | |||||||
| 14 | 0.60 | 0.20 | 10.5 | 0.007 | 0.07 | 1.0 | Balance of |
Table 3: process parameters and Properties of the examples steels
Claims (10)
1. The aluminum-silicon coated steel plate for the high-plasticity hot stamping forming comprises a substrate and a coating, and is characterized in that: the substrate is subjected to surface decarburization treatment before hot dip aluminum silicon plating, and a decarburized layer of 2-100 microns is obtained on the surface of the substrate.
2. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the base plate is a hot-rolled steel plate, the surface of the steel plate is decarburized after the steel plate is rolled and cooled, the steel plate is coiled at 500-750 ℃, the steel coil is in a loose-coil state, and a decarburized layer of 2-100 micrometers is formed on the surface of the steel plate.
3. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the substrate is a cold-rolled steel plate, surface decarburization treatment is simultaneously carried out in the hot-dip coating recrystallization annealing process, the heating temperature of the steel plate is 800-850 ℃, the surface of the steel plate is subjected to oxidizing treatment in the temperature range of 500-800 ℃, and a decarburized layer of 2-50 microns is formed on the surface of the steel plate; and then continuously heating and preserving heat in a reducing atmosphere, and carrying out reduction treatment on the surface to reduce the iron oxide on the surface into pure iron.
4. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the substrate is a cold-rolled steel plate, surface decarburization treatment is carried out after hot rolling, and surface decarburization treatment is not carried out in the hot dip coating recrystallization annealing process.
5. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the substrate comprises the following elements in percentage by mass: 0.15 to 0.60 percent of C, 0.05 to 3.0 percent of Si, 1.10 to 10.50 percent of Mn, less than or equal to 0.05 percent of P, less than or equal to 0.05 percent of S, 0.01 to 3.00 percent of Al, less than or equal to 0.10 percent of Ti, less than or equal to 0.007 percent of B, 0.02 to 0.80 percent of Cr, less than or equal to 0.80 percent of Cu, less than or equal to 0.10 percent of Nb, and one or two of Mo0.02 to 1.50 percent and Ni0.2 to 1.0 percent, Fe and inevitable impurities.
6. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the plating layer comprises the following elements in percentage by mass: si 5-15.0%, one or more of Ti 0.03-0.20%, Re 0.01-0.10%, Mn 0.5-3.0%, Ni 0.5-4.0%, Zr0.5-1.0%, Cr0.1-1.0%, and the balance Al.
7. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the hot-dip aluminum-silicon plating method comprises the following steps: when the substrate is a hot-rolled steel plate, heating the acid-washed steel plate at the heating temperature of below 750 ℃, wherein the atmosphere of a heating furnace is nitrogen-hydrogen mixed gas, and heating the steel plate in a zinc pot at the temperature of 630-700 ℃; when the substrate is a cold-rolled steel plate, the steel plate subjected to surface decarburization treatment is directly put into a zinc pot for hot dip coating, and the temperature of the zinc pot is 630-700 ℃.
8. The aluminum-silicon-plated steel sheet for high-plasticity hot stamping forming according to claim 1, wherein: the hot rolling process comprises the following steps: heating at 1240 +/-30 ℃, preserving heat for 160-240 minutes, rough rolling at 1100 +/-30 ℃, finish rolling at 1050 +/-30 ℃ and final rolling at 880 +/-30 ℃.
9. A hot-stamping method for the Al-Si plated steel sheet for high-plasticity hot-stamping molding according to claim 1, comprising the steps of: heating the steel plate to a temperature range of 850-950 ℃, controlling the heating speed to be below 30 ℃/s in the temperature range below 650 ℃, keeping the temperature for 3-15 minutes in the temperature range of 850-950 ℃, and then carrying out hot stamping, wherein the cooling rate in the hot stamping process is more than 20 ℃/s, and the cooling end point temperature is controlled to be 100-350 ℃.
10. A steel sheet produced by the hot-stamping method for the aluminum-silicon plated steel sheet for high-plasticity hot-stamping forming according to claim 9, wherein: the yield and tensile strength of the steel plate are both more than 1500MPa, and the elongation is more than or equal to 8 percent; the plating layer is completely converted into an iron alloy layer, and the phenomenon of C enrichment on the subsurface is avoided; the steel sheet has a structure of martensite + ferrite + retained austenite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110035515.5A CN112877632A (en) | 2021-01-12 | 2021-01-12 | Aluminum-silicon plated steel plate for high-plasticity hot stamping forming and hot stamping method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110035515.5A CN112877632A (en) | 2021-01-12 | 2021-01-12 | Aluminum-silicon plated steel plate for high-plasticity hot stamping forming and hot stamping method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112877632A true CN112877632A (en) | 2021-06-01 |
Family
ID=76045679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110035515.5A Pending CN112877632A (en) | 2021-01-12 | 2021-01-12 | Aluminum-silicon plated steel plate for high-plasticity hot stamping forming and hot stamping method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112877632A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953346A (en) * | 2021-09-29 | 2022-01-21 | 首钢集团有限公司 | Aluminum-silicon alloy coating coated steel plate for hot stamping and preparation method and application thereof |
| CN114892074A (en) * | 2022-04-13 | 2022-08-12 | 首钢集团有限公司 | Hot-dip aluminum-silicon medium manganese steel suitable for hot forming process and preparation method thereof |
| CN115475832A (en) * | 2022-10-11 | 2022-12-16 | 东北大学 | Production process for improving bending property of Al-Si coating hot forming steel through cold rolling |
| CN117344181A (en) * | 2023-10-10 | 2024-01-05 | 鞍钢股份有限公司 | Aluminum alloy coated steel plate with good high-temperature service performance and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6077956A (en) * | 1983-10-05 | 1985-05-02 | Kawasaki Steel Corp | High tensile strength cold-rolled steel plate having above 50kgf/mm2 strength with superior bending characteristic and stretch-flange formability and production of said steel plate |
| JPH06207262A (en) * | 1993-01-06 | 1994-07-26 | Sky Alum Co Ltd | Far infrared ray radiation member and manufacture thereof |
| KR20150074931A (en) * | 2013-12-24 | 2015-07-02 | 주식회사 포스코 | Oriented electrical steel sheet and method for manufacturing the same |
| CN104769138A (en) * | 2012-09-06 | 2015-07-08 | 安赛乐米塔尔研发有限公司 | Method for the production of press-hardened, coated steel parts and pre-coated steel sheets that can be used for the production of said parts |
| CN108796418A (en) * | 2018-06-20 | 2018-11-13 | 华冠新型材料股份有限公司 | Continuous hot-dipping alsimay steel plate and preparation method thereof and plating solution |
| CN108913950A (en) * | 2018-08-07 | 2018-11-30 | 鞍钢股份有限公司 | Zinc-magnesium coated steel sheet for hot stamping forming, method for producing same, and hot stamping method |
| CN109207806A (en) * | 2017-06-30 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of the cast Al-Si alloy ingot and its application method of hot-dip aluminizing silicon production |
| CN109207807A (en) * | 2017-06-30 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of the cast Al-Si alloy ingot and its application method of hot-dip aluminizing silicon production |
| CN111041370A (en) * | 2019-12-31 | 2020-04-21 | 马鞍山钢铁股份有限公司 | Cr-Al-Si alloy system coated steel plate with wide hot forming heating process window and preparation and hot stamping forming process thereof |
| CN111778467A (en) * | 2020-09-04 | 2020-10-16 | 育材堂（苏州）材料科技有限公司 | Precoated steel sheet with precoated layer of aluminum or aluminum alloy, process for producing the same, and hot press-formed member |
-
2021
- 2021-01-12 CN CN202110035515.5A patent/CN112877632A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6077956A (en) * | 1983-10-05 | 1985-05-02 | Kawasaki Steel Corp | High tensile strength cold-rolled steel plate having above 50kgf/mm2 strength with superior bending characteristic and stretch-flange formability and production of said steel plate |
| JPH06207262A (en) * | 1993-01-06 | 1994-07-26 | Sky Alum Co Ltd | Far infrared ray radiation member and manufacture thereof |
| CN104769138A (en) * | 2012-09-06 | 2015-07-08 | 安赛乐米塔尔研发有限公司 | Method for the production of press-hardened, coated steel parts and pre-coated steel sheets that can be used for the production of said parts |
| KR20150074931A (en) * | 2013-12-24 | 2015-07-02 | 주식회사 포스코 | Oriented electrical steel sheet and method for manufacturing the same |
| CN109207806A (en) * | 2017-06-30 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of the cast Al-Si alloy ingot and its application method of hot-dip aluminizing silicon production |
| CN109207807A (en) * | 2017-06-30 | 2019-01-15 | 宝山钢铁股份有限公司 | A kind of the cast Al-Si alloy ingot and its application method of hot-dip aluminizing silicon production |
| CN108796418A (en) * | 2018-06-20 | 2018-11-13 | 华冠新型材料股份有限公司 | Continuous hot-dipping alsimay steel plate and preparation method thereof and plating solution |
| CN108913950A (en) * | 2018-08-07 | 2018-11-30 | 鞍钢股份有限公司 | Zinc-magnesium coated steel sheet for hot stamping forming, method for producing same, and hot stamping method |
| CN111041370A (en) * | 2019-12-31 | 2020-04-21 | 马鞍山钢铁股份有限公司 | Cr-Al-Si alloy system coated steel plate with wide hot forming heating process window and preparation and hot stamping forming process thereof |
| CN111778467A (en) * | 2020-09-04 | 2020-10-16 | 育材堂（苏州）材料科技有限公司 | Precoated steel sheet with precoated layer of aluminum or aluminum alloy, process for producing the same, and hot press-formed member |
Non-Patent Citations (1)
| Title |
|---|
| 《日本冷轧带钢技术》翻译组译: "《日本冷轧带钢技术》", 31 October 1985, 北京：冶金工业出 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113953346A (en) * | 2021-09-29 | 2022-01-21 | 首钢集团有限公司 | Aluminum-silicon alloy coating coated steel plate for hot stamping and preparation method and application thereof |
| CN114892074A (en) * | 2022-04-13 | 2022-08-12 | 首钢集团有限公司 | Hot-dip aluminum-silicon medium manganese steel suitable for hot forming process and preparation method thereof |
| CN115475832A (en) * | 2022-10-11 | 2022-12-16 | 东北大学 | Production process for improving bending property of Al-Si coating hot forming steel through cold rolling |
| CN117344181A (en) * | 2023-10-10 | 2024-01-05 | 鞍钢股份有限公司 | Aluminum alloy coated steel plate with good high-temperature service performance and preparation method thereof |
| CN117344181B (en) * | 2023-10-10 | 2024-09-13 | 鞍钢股份有限公司 | Aluminum alloy coated steel plate with good high-temperature service performance and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11578382B2 (en) | Hot stamped component, precoated steel sheet used for hot stamping and hot stamping process | |
| WO2020108594A1 (en) | Zinc-based plated hot-formed steel plate or steel strip having excellent cold bending performance, and manufacturing method thereof | |
| JP6854271B2 (en) | Steel plate used for hot stamping | |
| CN110129668B (en) | 1000 MPa-grade alloying hot-dip galvanizing complex-phase steel and preparation method thereof | |
| US10100385B2 (en) | High-formability and super-strength hot galvanizing steel plate and manufacturing method thereof | |
| CN112877632A (en) | Aluminum-silicon plated steel plate for high-plasticity hot stamping forming and hot stamping method thereof | |
| US10351942B2 (en) | Hot-dip galvannealed hot-rolled steel sheet and process for producing same | |
| CN111349771B (en) | 980 MPa-grade cold-rolled Q & P steel with excellent plasticity and manufacturing method thereof | |
| CN111041382A (en) | 1800 MPa-grade non-coating hot forming steel with low high-temperature friction coefficient and preparation method thereof | |
| CN114107806A (en) | 450 MPa-grade hot-galvanized dual-phase steel with high work hardening rate and surface quality and production method thereof | |
| CN116334489A (en) | Hot stamping forming steel with super-strong high-temperature oxidation resistance and preparation method thereof | |
| CN114058968A (en) | High-plasticity hot forming steel with oxidation resistance for automobile and hot forming process | |
| CN108913950B (en) | Zinc-magnesium coated steel sheet for hot stamping forming, method for producing same, and hot stamping method | |
| WO2023226813A1 (en) | Highly corrosion-resistant galvanised hot-formed hardened steel, parts of same, and preparation method therefor | |
| EP4332246A1 (en) | Hot stamping component having tensile strength greater than or equal to 1000 mpa and fabrication method therefor | |
| CN114369758A (en) | High-strength high-toughness hot stamping steel matrix and preparation method and application thereof | |
| JP4551169B2 (en) | Manufacturing method of high strength parts | |
| JP4317506B2 (en) | Manufacturing method of high strength parts | |
| CN114934228B (en) | Hot-formed steel plate and production method thereof | |
| CN113718166A (en) | Hot-dip aluminum-zinc steel plate with yield strength of 320MPa and manufacturing method thereof | |
| CN112048662A (en) | Age-resistant bake-hardening steel plate, galvanized plate thereof and production method | |
| CN114892074B (en) | Hot-dip aluminum-silicon medium manganese steel suitable for hot forming process and preparation method thereof | |
| CN114045440B (en) | High-strength high-plasticity hot forming steel with oxidation resistance for automobile and hot forming process | |
| CN115478233B (en) | Zinc-based hot forming steel and preparation method thereof | |
| CN115612816B (en) | Method for preparing complex phase steel and steel plating plate for thermoforming from boron-containing steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210601 |