CN109518114A - The manufacturing method and hot stamping part of hot stamping part with alusil alloy coating - Google Patents

The manufacturing method and hot stamping part of hot stamping part with alusil alloy coating Download PDF

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Publication number
CN109518114A
CN109518114A CN201811035118.2A CN201811035118A CN109518114A CN 109518114 A CN109518114 A CN 109518114A CN 201811035118 A CN201811035118 A CN 201811035118A CN 109518114 A CN109518114 A CN 109518114A
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China
Prior art keywords
temperature
heat
hot
aluminum
time
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CN201811035118.2A
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Chinese (zh)
Inventor
谭宁
付江
洪继要
方学华
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Application filed by Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Priority to CN202311026106.4A priority Critical patent/CN117483561A/en
Publication of CN109518114A publication Critical patent/CN109518114A/en
Priority to EP19847997.4A priority patent/EP3770295B1/en
Priority to ES19847997T priority patent/ES2962214T3/en
Priority to DK19847997.4T priority patent/DK3770295T3/en
Priority to PCT/CN2019/104708 priority patent/WO2020030200A1/en
Priority to RU2020133922A priority patent/RU2764729C1/en
Priority to PT198479974T priority patent/PT3770295T/en
Priority to HUE19847997A priority patent/HUE063894T2/en
Priority to US17/049,547 priority patent/US20210252579A1/en
Priority to PL19847997.4T priority patent/PL3770295T3/en
Priority to FIEP19847997.4T priority patent/FI3770295T3/en
Pending legal-status Critical Current

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    • 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
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
    • 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
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76—Adjusting the composition of the atmosphere
    • 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
    • C21D11/00—Process control or regulation for heat treatments
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • 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
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • 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
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • 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
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
    • C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Coating With Molten Metal (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The manufacturing method and hot stamping part of hot stamping part with alusil alloy coating, method include the following steps: that the steel plate for coating alusil alloy coating is processed into the blank of shape needed for part, and blank heat treatment is hot press-formed；The blank heat treatment is kept the temperature using two-part or Three-section type heating, and heating and thermal insulation is staged heating；The steel plate of the coating alusil alloy coating includes the alusil alloy coating on substrate and its at least one surface.The method of the present invention has fully considered aluminium silicon cladding characteristic, it can effectively solve the problems, such as the roll banding of aluminium silicon cladding, reduce the dross probability of heat-treatment furnace roller, the service life of roller is promoted, while guaranteeing the integrality of hot stamping part coating and the mechanical performance of component, welding performance, coating performance and corrosion resisting property.

Description

Method for producing hot-stamped member with aluminum-silicon alloy plating layer, and hot-stamped member
Technical Field
The present invention relates to a hot-stamped component manufacturing technology, and particularly to a method for manufacturing a hot-stamped component with an aluminum-silicon alloy plating layer, and a hot-stamped component.
Background
The main development trend of the automobile industry is light weight and emission reduction, a material with relatively low strength is adopted, the microstructure is changed through heat treatment, and finally the high strength of the automobile part is realized. Compared with a hot stamping product without a plating layer, the aluminum-silicon plating layer has good thickness and dimensional accuracy, good corrosion resistance and welding performance, and the proportion of the aluminum-silicon plating layer to the hot stamping product using the hot stamping steel at present is about 70 percent, and the proportion of the aluminum-silicon plating layer to the hot stamping product using the hot stamping steel is higher and higher in the foreseeable future.
Chinese patent CN101583486B discloses a method for coating a stamped product, including the temperature and time of stamping, the heating rate from room temperature to 700 ℃ is 4-12 ℃/s, the main purpose is to ensure the spot welding performance of the stamped parts.
Chinese patent CN102300707B further discloses a heating method for hot-stamped coated parts, specifically a heating rate at a melting temperature, a holding time at an austenitizing temperature, and the like, but in the use process of the heating method, considering the efficiency and the production tact of a heat treatment furnace, the heating method is found to be still unable to solve the problems of the aluminum-silicon coating sticking to a roll and nodulation, which causes the reduction of the service life of the heat treatment furnace roll, the falling of the coating of the hot-stamped parts, and the like.
Disclosure of Invention
The invention aims to provide a manufacturing method of a hot stamping part with an aluminum-silicon alloy coating and the hot stamping part, which can effectively solve the problem of roller sticking of the aluminum-silicon coating, reduce the nodulation probability of a roller of a heat treatment furnace, prolong the service life of the roller, and ensure the integrity of the coating of the hot stamping part and the mechanical property, welding property, coating property and corrosion resistance of the part.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a manufacturing method of a hot stamping part with an aluminum-silicon alloy coating comprises the following steps: processing the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a shape required by the part, carrying out heat treatment on the blank, and carrying out hot stamping forming; in the blank heat treatment, the blank is put into a heat treatment furnace for austenitizing heat treatment, and the blank heat treatment process comprises a first heating and heat-preserving section, a second heating and heat-preserving section and a third heating and heat-preserving section; wherein:
when the thickness of the steel plate coated with the aluminum-silicon alloy plating layer is less than 1.5mm,
a first heat-soak section, the heat-soak temperature and time being defined within a pattern ABCD having temperature and time ranges defined by A (750 ℃, 30s), B (750 ℃, 90s), C (870 ℃, 90s), D (870 ℃, 30 s);
a second heat-soak section, the heat-soak temperature and time being defined within a pattern EFGH having temperature and time ranges defined by E (875 ℃, 60s), F (875 ℃, 240s), G (930 ℃, 150s), H (930 ℃, 30 s);
a third heat-holding section in which the heat-holding temperature and time are defined within a pattern IJKL having temperature and time ranges defined by I (935 ℃, 60s), J (935 ℃, 240s), K (955 ℃, 180s), and L (955 ℃, 30 s);
when the thickness of the steel plate coated with the aluminum-silicon alloy coating is more than or equal to 1.5mm,
a first heat-soak period, the heat-soak temperature and time being defined within a graph A 'B' C 'D' having a temperature and time range defined by A '(750 ℃, 30s), B' (750 ℃, 90s), C '(890 ℃, 90s), D' (890 ℃, 30 s);
a second heat-soak zone, the heat-soak temperature and time being defined within a graph E 'F' G 'H' having temperature and time ranges defined by E '(895 ℃, 90s), F' (895 ℃, 270s), G '(940 ℃, 210s), H' (940 ℃, 60 s);
a third soak zone, the soak temperatures and times being defined within a profile I 'J' K 'L' having temperature and time ranges defined by I '(945 ℃, 60s), J' (945 ℃, 240s), K '(955 ℃, 180s), L' (955 ℃, 30 s).
Further, the blank heat treatment process comprises a first heating and heat preservation section and a third heating and heat preservation section, wherein the second heating and heat preservation time of the second heating and heat preservation section is zero, so that two-section type heating and heat preservation is formed; wherein,
when the thickness of the steel plate coated with the aluminum-silicon alloy plating layer is less than 1.5mm,
a first heat-soak section, the heat-soak temperature and time being defined within a graph abcd having temperature and time ranges defined by a (750 ℃, 30s), b (750 ℃, 90s), c (870 ℃, 90s), d (870 ℃, 30 s);
the third soak zone temperature, soak temperature and time are defined in a graph ijkl having temperature and time ranges defined by i (935 ℃, 180s), j (935 ℃, 300s), k (955 ℃, 270s), l (955 ℃, 150 s);
when the thickness of the steel plate coated with the aluminum-silicon alloy coating is more than or equal to 1.5mm,
a first heat-soak period, the heat-soak temperature and time being defined within a graph a 'b' c'd' having a temperature and time range defined by a '(750 ℃, 30s), b' (750 ℃, 90s), c '(890 ℃, 90s), d' (890 ℃, 30 s);
the third soak zone temperature, soak temperature and time are defined within a graph i 'j' k 'l' having temperature and time ranges defined by i '(945 ℃, 180s), j' (945 ℃, 300s), k '(955 ℃, 270s), l' (955 ℃, 150 s).
Furthermore, in the blank heat treatment process, the temperature in the first, second and third heating and heat preservation sections is a stepped temperature rise or a set temperature.
For example, the heat treatment process of the 1.2mm aluminum-silicon alloy coated steel plate can be 800 ℃ for 60s in the first heating and heat-preserving section, 930 ℃ for 120s in the second heating and heat-preserving section, and 940 ℃ for 60s in the third heating and heat-preserving section; alternatively, the first heat-preservation section may be set to a plurality of temperatures, such as 770 ℃, 40s, 820 ℃, 30s, 770 ℃, 50s, the second heat-preservation section may be set to a plurality of temperatures, such as 900 ℃, 60s, 930 ℃, 60s, the third heat-preservation section may be set to a plurality of temperatures, such as 935 ℃, 60s, 940 ℃, 60 s.
Preferably, the time of the blank heat treatment process is not less than 150s and not more than 600 s.
Preferably, the blank heat treatment process adopts a heat treatment furnace, the oxygen content of the atmosphere in the furnace is not lower than 15%, and the dew point in the furnace is not higher than-5 ℃.
Preferably, in the hot stamping forming process, the blank after heat treatment is quickly transferred to a die for stamping forming, the transfer time is 4-12 seconds, and the temperature of the blank before entering the die is not lower than 600 ℃; and cooling the die before stamping to ensure that the surface temperature of the die before stamping is lower than 100 ℃ and the cooling rate of the blank is higher than 30 ℃/s.
The steel plate coated with the aluminum-silicon alloy coating comprises a substrate and the aluminum-silicon alloy coating on at least one surface of the substrate, wherein the substrate comprises the following components in percentage by weight: c: 0.04-0.8%, Si < 1.2%, Mn: 0.1-5%, P < 0.3%, S < 0.1%, Al < 0.3%, Ti < 0.5%, B < 0.1%, Cr < 3%, and the balance Fe and unavoidable impurities.
Preferably, the aluminum-silicon alloy plating layer comprises the following components in percentage by weight: si: 4-14%, Fe: 0-4%, and the balance of Al and unavoidable impurities.
Preferably, the weight average value of the aluminum-silicon alloy plating layer is 58-105 g/m2Single-sided.
Preferably, the weight average value of the aluminum-silicon alloy coating is 72-88 g/m2Single-sided.
In addition, the aluminum-silicon alloy plating layer of the hot stamping part obtained by the manufacturing method comprises a surface alloy layer and a diffusion layer, and the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.08-0.5.
Specifically, the aluminum-silicon alloy plating layer comprises two layers, a diffusion layer is in contact with the substrate, and Al in the aluminum-silicon alloy plating layer is further diffused with Fe in the substrate in the heat treatment process to form the diffusion layer; al in the aluminum-silicon alloy coating and Fe of the substrate are alloyed to form a surface alloy layer; in the hot-stamped component, the ratio of the thickness of the diffusion layer to the total thickness of the aluminum-silicon alloy plating layer (including the diffusion layer and the surface alloy layer) is 0.08-0.5.
The yield strength of the hot stamping part is 400-1300MPa, the tensile strength is 500-2000MPa, and the elongation is more than or equal to 4 percent.
The hot forming part of the invention has no coating melting and sticking roller in the heat treatment process, complete coating, good adhesion and no obvious peeling on the surface.
The coating of the hot forming part disclosed by the invention does not fall off, the surface roughness meets the requirement, the ratio of the thickness of the diffusion layer to the thickness of the coating is 0.08-0.5, a paint film is complete after electrophoretic coating, and the adhesion of the paint film is evaluated to be more than 0 grade.
The thickness of the diffusion layer and the thickness of the plating layer of the hot forming part meet the requirements, the ratio of the thickness of the diffusion layer to the thickness of the plating layer is 0.08-0.5, the spot welding performance is excellent, and the spot welding interval is more than 2 KA.
The coating on the hot forming part can well meet the diffusion of the coating and the austenitization of the substrate in the heat treatment process, and simultaneously avoid the melting and roll sticking of the coating, thereby obtaining the hot stamping part with good coating performance and substrate performance.
Specifically, the melting point of an Al-Si alloy coating Al-Si alloy is 580-600 ℃, the austenitizing temperature of a steel plate is more than 840 ℃, the Al-Si alloy coating can melt in the heat treatment process and adhere to a furnace roller, Al in the coating and a substrate Fe can diffuse to form the Fe-Al alloy, the alloy has strong heat resistance and high melting temperature, and cannot adhere to the furnace roller.
The invention has the beneficial effects that:
by designing the blank heat treatment process, the invention reduces the adhesion of the aluminum-silicon alloy coating to the heat treatment furnace roller, reduces the nodulation incidence of the heat treatment furnace roller, and prolongs the maintenance period and the service life of the roller.
Meanwhile, the blank heat treatment process can improve the surface quality of the punched part and prevent the coating from peeling off in the heat treatment process.
In addition, the blank heat treatment method adopts a step-type heating mode, fully considers the characteristics of the aluminum-silicon alloy coating, reasonably adjusts the temperature and time according to the condition of material thickness, effectively utilizes energy and has good energy-saving effect.
Drawings
Fig. 1 shows the surface of an aluminum-silicon alloy-coated hot-stamped part prepared in comparative example 1.
Fig. 2 shows the surface of the aluminum-silicon alloy-plated hot-stamped member produced in example 1 of the present invention.
Fig. 3 is a sectional view of an aluminum-silicon alloy-plated hot-stamped member produced in example 1 of the present invention.
FIG. 4 is a schematic view showing the heating and holding temperatures and time ranges of the first to third heating and holding sections of the blank heat treatment process (three-section heating and holding) (steel plate thickness <1.5mm) according to the present invention.
FIG. 5 is a schematic view showing the heating temperature and time range of the first to third heat-preservation sections (steel plate thickness is 1.5mm or more) of the blank heat treatment process (three-section heat preservation) of the present invention.
FIG. 6 is a schematic view showing the heating temperature and time range of the first and third heat-preservation sections of the blank heat treatment process (two-stage heat preservation) according to the present invention.
Detailed Description
The invention is further illustrated by the following examples and figures.
Table 1 shows the composition of the steel sheet substrate of the example of the invention; table 2 shows the hot-stamped component manufacturing process and the properties of the hot-stamped components according to the examples of the present invention.
Example 1
1.2mm of substrate is hot-dipped and aluminized at 650 ℃, the plating solution components are 8% of Si, 2.3% of Fe, the balance is Al and inevitable impurities, the steel plate coated with the aluminum-silicon alloy plating layer is continuously blanked into a blank with a certain shape, the blank is subjected to heat treatment, the specific heat treatment parameters are shown in table 2, the appearance of the obtained hot stamping part is shown in figure 2, the microscopic structure diagram of the cross section of the aluminum-silicon alloy plating layer is shown in figure 3, the aluminum-silicon alloy plating layer comprises a surface alloy layer and a diffusion layer, and the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.
Example 2
Carrying out hot-dip aluminum plating on a 0.9mm substrate at 660 ℃, wherein the plating solution comprises 9% of Si, 2.5% of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank, wherein the specific heat treatment parameters are shown in table 2, and the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.3.
Example 3
Hot-dip aluminizing a 1.0mm substrate at 660 ℃, wherein the components of a plating solution comprise 8.5 percent of Si, 2.5 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.15.
Example 4
Hot-dip aluminizing a 1.1mm substrate at 680 ℃, wherein the components of a plating solution comprise 9.5 percent of Si, 2.5 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.28.
Example 5
Hot-dip aluminizing a 1.2mm substrate at 680 ℃, wherein the components of a plating solution comprise 8.8 percent of Si, 2.4 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.35.
Example 6
Hot-dip aluminizing a 1.5mm substrate at 680 ℃, wherein the components of a plating solution comprise 8.8 percent of Si, 2.4 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.35.
Example 7
Hot-dip aluminizing a 1.6mm substrate at 680 ℃, wherein the components of a plating solution comprise 8.8 percent of Si, 2.4 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.3.
Example 8
Hot-dip aluminizing a 1.8mm substrate at 680 ℃, wherein the components of a plating solution comprise 8.8 percent of Si, 2.4 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.35.
Example 9
Hot-dip aluminizing a 2.0mm substrate at 680 ℃, wherein the components of a plating solution comprise 8.8 percent of Si, 2.4 percent of Fe and the balance of Al and inevitable impurities, continuously blanking the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a certain shape, and carrying out heat treatment on the blank; the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.4.
TABLE 1 weight percent (wt%) of steel plate substrate composition
TABLE 2
FIG. 1 shows that in the comparative example, the aluminum-silicon coating on the surface of the hot stamping part melts, which causes the coating to stick to the roller.
FIG. 2 shows that the Al-Si alloy plating layer on the surface of the hot-stamped part in example 1 of the present invention showed no sign of melting and was fully alloyed.
FIG. 3 is a sectional view of the plated layer of the hot-stamped component in example 1 of the present invention. As can be seen from the figure: the aluminum-silicon alloy plating layer comprises two layers, namely a surface alloy layer and a diffusion layer, the thickness ratio of the diffusion layer to the aluminum-silicon alloy plating layer is about 0.25, and the substrate mainly comprises martensite.
FIG. 4 shows the ranges of the first, second and third heat-preservation sections when the thickness of the Al-Si alloy coated steel plate is less than 1.5mm, the temperature and time of the first heat-preservation section is limited in the pattern ABCD, the temperature and time of the second heat-preservation section is limited in the pattern EFGH, and the temperature and time of the third heat-preservation section is limited in the pattern IJKL.
FIG. 5 shows that when the thickness of the Al-Si alloy coating-coated steel plate is greater than or equal to 1.5mm, the heating and holding temperature and time of the first heating and holding section are limited in the graph A 'B' C 'D', the heating and holding temperature and time of the second heating and holding section are limited in the graph E 'F' G 'H', and the heating and holding temperature and time of the third heating and holding section are limited in the graph I 'J' K 'L'.
Fig. 6 is a schematic view showing the heating temperature and the heating time range of the first and third heating and heat-preserving sections in the blank heat treatment process (two-section heating and heat preservation) of the present invention, wherein the second heating and heat-preserving time of the second heating and heat-preserving section is zero, so as to form two-section heating and heat preservation.
When the thickness of the steel plate coated with the aluminum-silicon alloy coating is less than 1.5mm, the heating and heat-preserving temperature and time of the first heating and heat-preserving section are limited in the graph abcd, and the heating and heat-preserving temperature and time of the third heating and heat-preserving section are limited in the graph ijkl.
When the thickness of the steel plate coated with the aluminum-silicon alloy coating is more than or equal to 1.5mm, the heating and heat preservation temperature and time of the first heating and heat preservation section are limited in the graph a 'b' c'd', and the heating and heat preservation temperature and time of the third heating and heat preservation section are limited in the graph i 'j' k 'l'.

Claims (12)

1. The manufacturing method of the hot stamping part with the aluminum-silicon alloy coating comprises the following steps: processing the steel plate coated with the aluminum-silicon alloy plating layer into a blank with a shape required by the part, carrying out heat treatment on the blank, and carrying out hot stamping forming; the method is characterized in that in the blank heat treatment, the blank is put into a heat treatment furnace for austenitizing heat treatment, and the blank heat treatment process comprises a first heating and heat preserving section, a second heating and heat preserving section and a third heating and heat preserving section; wherein:
when the thickness of the steel plate coated with the aluminum-silicon alloy plating layer is less than 1.5mm,
a first heat-soak section, the heat-soak temperature and time being defined within a pattern ABCD having temperature and time ranges defined by A (750 ℃, 30s), B (750 ℃, 90s), C (870 ℃, 90s), D (870 ℃, 30 s);
a second heat-soak section, the heat-soak temperature and time being defined within a pattern EFGH having temperature and time ranges defined by E (875 ℃, 60s), F (875 ℃, 240s), G (930 ℃, 150s), H (930 ℃, 30 s);
a third heat-holding section in which the heat-holding temperature and time are defined within a pattern IJKL having temperature and time ranges defined by I (935 ℃, 60s), J (935 ℃, 240s), K (955 ℃, 180s), and L (955 ℃, 30 s);
when the thickness of the steel plate coated with the aluminum-silicon alloy coating is more than or equal to 1.5mm,
a first heat-soak period, the heat-soak temperature and time being defined within a graph A 'B' C 'D' having a temperature and time range defined by A '(750 ℃, 30s), B' (750 ℃, 90s), C '(890 ℃, 90s), D' (890 ℃, 30 s);
a second heat-soak zone, the heat-soak temperature and time being defined within a graph E 'F' G 'H' having temperature and time ranges defined by E '(895 ℃, 90s), F' (895 ℃, 270s), G '(940 ℃, 210s), H' (940 ℃, 60 s);
a third soak zone, the soak temperatures and times being defined within a profile I 'J' K 'L' having temperature and time ranges defined by I '(945 ℃, 60s), J' (945 ℃, 240s), K '(955 ℃, 180s), L' (955 ℃, 30 s).
2. The method according to claim 1, wherein the blank heat treatment process comprises a first heating and holding section and a third heating and holding section, and the second heating and holding time of the second heating and holding section is zero, so that two-stage heating and holding is realized; wherein,
when the thickness of the steel plate coated with the aluminum-silicon alloy plating layer is less than 1.5mm,
a first thermal soak zone, the thermal soak temperature and time being defined within a graph abcd having temperature and time icons defined as a (750 ℃, 30s), b (750 ℃, 90s), c (870 ℃, 90s), d (870 ℃, 30 s);
the third soak zone temperature, soak temperature and time are defined in a graph ijkl having temperature and time ranges defined by i (935 ℃, 180s), j (935 ℃, 300s), k (955 ℃, 270s), l (955 ℃, 150 s);
when the thickness of the steel plate coated with the aluminum-silicon alloy coating is more than or equal to 1.5mm,
a first heat-soak period, the heat-soak temperature and time being defined within a graph a 'b' c'd' having a temperature and time range defined by a '(750 ℃, 30s), b' (750 ℃, 90s), c '(890 ℃, 90s), d' (890 ℃, 30 s);
the third soak zone temperature, soak temperature and time are defined within a graph i 'j' k 'l' having temperature and time ranges defined by i '(945 ℃, 180s), j' (945 ℃, 300s), k '(955 ℃, 270s), l' (955 ℃, 150 s).
3. The method for producing a hot-stamped component with an al-si alloy coating as claimed in claim 1, wherein in the blank heat treatment process, the temperature in the first, second and third heat-holding stages is raised stepwise or set to one temperature.
4. The method for producing a hot-stamped component with an aluminum-silicon alloy coating as claimed in claim 1, wherein the time of the blank heat treatment process is not less than 150 seconds and not more than 600 seconds.
5. The method for producing a hot-stamped member with an Al-Si alloy coating as claimed in claim 1, wherein the heat treatment of the billet is carried out in a heat treatment furnace having an atmospheric oxygen content of not less than 15% and a dew point of not more than-5 ℃.
6. The method for producing a hot-stamped part with an aluminum-silicon alloy coating according to claim 1, wherein in the hot-stamping forming step, the blank after the heat treatment is rapidly transferred to a die for stamping forming, the transfer time is 4 to 12 seconds, and the temperature of the blank before the blank is inserted into the die is not lower than 600 ℃; and cooling the die before stamping to ensure that the surface temperature of the die before stamping is lower than 100 ℃ and the cooling rate of the blank is higher than 30 ℃/s.
7. The method for producing a hot-stamped component with an al-si alloy plating layer according to claim 1, wherein the al-si alloy plating layer-coated steel sheet comprises a substrate and an al-si alloy plating layer on at least one surface thereof, and the substrate comprises the following components in percentage by weight: c: 0.04-0.8%, Si < 1.2%, Mn: 0.1-5%, P < 0.3%, S < 0.1%, Al < 0.3%, Ti < 0.5%, B < 0.1%, Cr < 3%, and the balance Fe and unavoidable impurities.
8. The method for producing a hot-stamped component with an aluminum-silicon alloy plating layer according to claim 7, wherein the aluminum-silicon alloy plating layer comprises the following components in percentage by weight: si: 4-14%, Fe: 0-4%, and the balance of Al and unavoidable impurities.
9. The method for producing a hot-stamped member with an Al-Si alloy plating layer according to claim 7 or 8, wherein the Al-Si alloy plating layer has a weight average value of 58 to 105g/m2Single-sided.
10. The method for producing a hot-stamped member with an Al-Si alloy plating layer according to claim 7 or 8, wherein the Al-Si alloy plating layer has a weight average value of 72 to 88g/m2Single-sided.
11. The hot-stamped component obtained by the method for producing a hot-stamped component with an aluminum-silicon alloy plating layer according to any one of claims 1 to 10, wherein the aluminum-silicon alloy plating layer of the hot-stamped component contains a surface alloy layer and a diffusion layer, and the ratio of the thickness of the diffusion layer to the thickness of the aluminum-silicon alloy plating layer is 0.08 to 0.5.
12. The method for producing a hot-stamped component with an Al-Si alloy coating as claimed in claim 11, wherein the yield strength of the hot-stamped component is 400-1300MPa, the tensile strength is 500-2000MPa, and the elongation is 4% or more.
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Application publication date: 20190326