CN109554661A - Steel disc and manufacture steel disc are in the method for protective coating deflection - Google Patents
Steel disc and manufacture steel disc are in the method for protective coating deflection Download PDFInfo
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- CN109554661A CN109554661A CN201711257984.1A CN201711257984A CN109554661A CN 109554661 A CN109554661 A CN 109554661A CN 201711257984 A CN201711257984 A CN 201711257984A CN 109554661 A CN109554661 A CN 109554661A
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- steel disc
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- heating
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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
-
- 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
-
- 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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/28—Associations of cutting devices therewith
- B21D43/287—Devices for handling sheet or strip material
-
- 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
- C21D1/34—Methods of heating
-
- 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
- C21D1/34—Methods of heating
- C21D1/40—Direct resistance heating
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface 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
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/60—After-treatment
-
- 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
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface treatment
- C21D8/0284—Application of a separating or insulating coating
Abstract
The present invention provides steel discs and manufacture steel disc in the method for protective coating deflection, specifically provides the electrically heated steel disc of manufacture with the method for protective coating deflection and the steel disc made of this method.The steel disc can allow to prevent that the deflection of electric heating floating coat and the heat treatment before the electric heating steel disc during heat forming processes including the coating comprising aluminium-iron intermetallic compound based on Al.Specifically, this method may include: heat treatment steel disc；The steel disc of heat treatment is stated in electric heating；Suppress and shape the steel disc of heating；And the steel disc of cooling forming.
Description
The citation of related application
This application claims the South Korea submitted in Korean Intellectual Property Office on the 27th of September in 2017 is enjoyed at 35U.S.C. § 119
The priority of number of patent application 10-2017-0124971, it is whole incorporated herein with it that disclosure passes through citation.
Technical field
The present invention relates to the method for shaping electrically heated steel disc and the steel discs made of this method.The steel disc may include can
Include coating of the aluminium-iron intermetallic compound based on Al with pass through heat treatment formation before electric heating steel disc, thus prevents
The only deflection of the coating during electric heating.
Background technique
Recently, due to the environmental problem occurred all over the world, the method for reducing fuel has been found and is asked with solving these
Topic.In order to reduce fuel consumption, the solution proposed as automobile industry is to improve the efficiency and drop of vehicle engine
The weight of the low vehicles.The weight for mitigating the vehicles has been provided as the good of the fuel efficiency for increasing the vehicles
Measure.However, if the weight of the vehicles reduces, intensity needed for the vehicles may be unsatisfactory for and durability.Therefore, it solves
Certainly the problem is becoming the maximum target of automobile industry.
For example, automobile industry has developed the various environment-friendly type vehicles, it is intended to be reduced to CO2 emissions
95g/km, this is 27% level compared to the present level until 2021.In addition, in order to meet 54.5mpg (23.2km/
L the standard value to corporate average fuel economy (CAFE) in 2025), excitation automaker reduce vehicle size
With raising fuel efficiency.
In general, the weight of material may reduce according to the increase of number of components or the increase of weight.At this point, as subtracting
The method of light weight, many heat treatment technics have been applied to the surface of height reinforcing material or curing materials.For example, as changing
It is apt to the manufacturing method of the intensity of the component for the vehicles, thermo shaping method is widely used.Specifically, in thermo shaping method
In, be designed as heat hardening type steel disc can be higher than austenitizing temperature at a temperature of heat, it is then fast at room temperature
Quickly cooling but, and passes through the acquisition height of the structure change of the shape and steel of product and the mold with cooling duct is suppressed simultaneously
The low formed parts of intensity.
Therefore, in order to mitigate the weight of the vehicles, thermo shaping method is applied more and more, however, due to hot forming
The characteristic of method and high manufacturing cost, it is difficult to which thermo shaping method is applied to various parts used in the vehicles.Fig. 1 is shown
The flow chart of the method for hot forming steel disc is manufactured according to the prior art.As shown in Figure 1, general thermo shaping method can successively lead to
Cross blank steel disc preparation step (S11), heating stepses (S13), hot forming step (S15) and laser finishing steps (S17) and into
Row.Heating stepses in the prior art can be using gas or electricity, the i.e. method in indirect heating source.However, using adding indirectly
The method of heat source may have not only that the thermal efficiency is low, but also the problem that heating furnace installation cost is high.
Therefore, to solve the above-mentioned problems, in the prior art, electricity is directly applied by the self-resistance using steel disc
In on hot formed steel disc to generate heat.For example, Fig. 2, which is shown, manufactures hot forming by electric heating according to the prior art
The flow chart of the method for steel disc.As shown in Fig. 2, method can successively include: blank steel disc preparation step (S21), electric heating step
Suddenly (S23), hot forming step (S25) and laser finishing steps (S27).Compared with general heating stepses, corresponds to and use steel disc
The electric heating step of the heating means of the resistance of itself improves the thermal efficiency compared with indirect heating source.
However, commonly used material is corresponding to the steel for including the coating based on Al in thermo shaping method in the prior art
Piece.However, when applying electricity to the steel disc for including the coating based on Al, the coating material of melting may in electric heating step
The magnetic force that generates when due to applying electricity and deflection, and avoid electric heating.
In order to solve this problem, for example, the electric heating step using the steel disc for including the coating based on Zn can be provided,
However, the steel disc including the coating based on Zn has lower corrosion resistance etc. compared to the steel disc for including the coating based on Al.
It is, therefore, possible to provide the present invention is to solve above-mentioned problem of the prior art, and pass through to prevent from including based on Al's
The deflection of the steel disc of coating and improve corrosion resistance etc..
Summary of the invention
In a preferred aspect, the electrically heated steel disc of manufacture is provided to prevent to increase in hot stamping operation
The method and steel disc of the deflection of the coating of energy efficiency.Therefore, the present invention can include by being heat-treated before electric heating
Steel disc based on the coating of Al and the production cost of reduction is provided simultaneously.
In further preferred aspect, the steel disc manufactured by electric heating is provided, it can be by using including
Steel disc based on the coating of Al and improve resistance to rust and weldability and reduced crackle.
It is expected that the other technologies purpose realized is not limited to above-mentioned purpose in the present invention, and by disclosure of the invention, it is above
The other technical purposes not described will be apparent those skilled in the art.
Exemplary embodiments of the present invention provide the method for manufacturing electrically heated steel disc.This method may include: heat
Handle steel disc；The steel disc of electric-heating heat treatment；Suppress and shape the steel disc of heating；And the steel disc of cooling forming.
The surface of steel disc may include the coating based on Al.
Coating based on Al can be through heat-treatment alloying aluminium-iron.
By aluminum-iron alloy, coating may include Al13Fe4Intermetallic compound.
Term " intermetallic compound " as used herein refers to through specific interaction therebetween (for example, metallic bond
Or ionic bond) compound that is formed by least two or more metallic elements and optional one or more nonmetalloids.
Preferred intermetallic compound can exist with the solid-state of the ordered arrangement with constitution element, for example, crystallization or solid solution.Gold
Compound can have the property different from every kind of ingredient between category, and therefore the formation of intermetallic compound can change new property
Matter or improvement specific character, such as fusing point, brittleness, corrosion resistance etc..
The iron content of coating can be about 24 atom % or higher.
The temperature of heat treatment step can be about 600 DEG C to 660 DEG C.
The time of heat treatment step can be 5 minutes or longer.
Heat treatment can be carried out by batch annealing furnace (BAF) method.
Suppressing can carry out with the steel disc of the steel disc of forming heating and cooling forming simultaneously.
Method may further include the cooling steel disc of cutting.
Laser progress can be used in cutting.
It is of the invention another exemplary embodiment provides the steel disc for including the coating based on Al, and steel disc can be with
Pass through following manufacture: heat treatment steel disc；The steel disc of electric-heating heat treatment；Suppress and shape the steel disc of heating；And cooling forming
Steel disc.Preferably, electric heating can be application electric current.
Coating can be the Al-Fe by heat treatment alloying.
By aluminum-iron alloy, the coating based on Al may include Al13Fe4Intermetallic compound.
The iron content of coating can be 24 atom % or higher.
The vehicles including steel disc as described herein further provided herein.
According to the present invention, the method for manufacturing electrically heated steel disc is provided, to prevent coating deflection, and by adding in electricity
Heat includes that the steel disc of the coating based on Al is heat-treated before and increases the energy efficiency in hot stamping operation and reduce production simultaneously
Cost.In addition, can have by the steel disc that method described herein manufactures by using the steel disc comprising the coating based on Al
The generation of improved rust-preventing characteristic and solderability and reduced crackle.
Other aspects of the present invention are disclosed below.
Detailed description of the invention
Fig. 1 is the flow chart for manufacturing the method for hot forming steel disc according to prior art.
Fig. 2 is the flow chart for manufacturing the method for hot forming steel disc by electric heating according to prior art.
Fig. 3 is to show coating material, electrically heated GA coating material, the electrically heated coating based on Zn-Ni based on Al
The chart of the usable range of the spot welding of material.
Fig. 4 A-4C is the surface (Fig. 4 A) for showing the steel disc including the electrically heated coating based on Al, electrically heated GA's
The enlarged photograph of the rust-preventing characteristic on surface (Fig. 4 B) and the surface (Fig. 4 C) of the steel disc including the electrically heated coating based on Zn-Ni.
Fig. 5 A is the enlarged photograph of the macroscopic cracking formed on the coating based on Zn, and Fig. 5 B is in the coating based on Zn
The schematic diagram of the macroscopic cracking of upper formation.
Fig. 6 A is the enlarged photograph of the micro-crack formed on the coating based on Zn, and Fig. 6 B is on the coating based on Zn
The schematic diagram of the micro-crack of formation.
Fig. 7 A-7C is the surface (Fig. 7 A) of steel disc for including the coating based on Al, the surface (Fig. 7 B) of GA and including being based on
The enlarged photograph on the electrically heated surface (Fig. 7 C) of the steel disc of the coating of Zn-Ni.
Fig. 8 is the schematic diagram of the deflection of the coating caused by the magnetic field based on Al during showing electric heating.
Fig. 9 A is the cross-section photograph of the amplification of exterior section, and Fig. 9 B is wherein to include by what electric heating generated deflection
The center portion of the steel disc of coating based on Al.
Figure 10 is the chart for showing the state of aluminium and iron.
Figure 11 A is the Front-coating mirror amplification cross-section photograph of the heat treatment of electrically heated hot forming steel disc, and Figure 11 B is according to this
The illustrative embodiments of invention are being heat-treated electrically heated hot forming steel disc to prevent the amplification of the coating after coating deflection
Cross-section photograph.
Figure 12 A-12B be 400 DEG C at a temperature of heat treatment 10 minutes after after (Figure 12 A) and electric heating (Figure 12 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 13 A-13B be 600 DEG C at a temperature of heat treatment 1 minute after (Figure 13 A) and after electric heating (Figure 13 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 14 A-14B be 600 DEG C at a temperature of heat treatment 2 minutes after (Figure 14 A) and after electric heating (Figure 14 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 15 A-15B be 600 DEG C at a temperature of heat treatment 3 minutes after (Figure 15 A) and after electric heating (Figure 15 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 16 A-16B be 600 DEG C at a temperature of heat treatment 4 minutes after (Figure 16 A) and after electric heating (Figure 16 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 17 A-17B be 600 DEG C at a temperature of heat treatment 5 minutes after (Figure 17 A) and after electric heating (Figure 17 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 18 A-18B be 600 DEG C at a temperature of heat treatment 6 minutes after (Figure 18 A) and after electric heating (Figure 18 B)
The enlarged photograph on the steel disc surface including the coating based on Al.
Figure 19 A-19B be 600 DEG C at a temperature of heat treatment 10 minutes after (Figure 19 A) and after electric heating (figure
19B) include the coating based on Al steel disc surface enlarged photograph.
Figure 20 A-20B is after the nonheat-treated steel disc surface (Figure 20 A) comprising the coating based on Al and electric heating
The enlarged photograph on the steel disc surface (Figure 20 B) of the coating based on Al.
Figure 21 is that illustrative embodiments manufacture electrically heated steel disc to prevent the exemplary of coating deflection according to the present invention
The flow chart of method.
Specific embodiment
Term used herein is only used for describing the purpose of specific illustrative embodiment, is not intended to be limiting this hair
It is bright.Unless the context clearly indicates otherwise, singular as used herein "one", "an" and "the" be also intended to including multiple
Number form formula.It is to be further understood that when used in this manual, term " includes " and/or the specified institute of "comprising" are old
Feature, entirety, the step, operation, the presence of element and/or component stated, but do not preclude the presence or addition of it is one or more other
Feature, entirety, step, operation, element, component and/or combination thereof.As utilized herein, term "and/or" includes one or more
Any and all combinations of a relevant listed item.
It is it will be evident that term " about " as used herein is construed as in this field unless stated otherwise or by context
Normal tolerance range in, for example, in 2 standard deviations of average value." about " can be understood as described value 10%,
9%, within 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.1%, 0.05% or 0.01%.Unless context
In in addition explicitly point out, otherwise all numerical value provided herein are modified by term " about ".
It should be understood that term as used herein " vehicles " or " vehicles " or other similar term packet
Common automotive is included, such as includes passenger car, bus, the truck of sport vehicle (SUV), various quotient
With the vehicles, the ship including various boats and ship, aircraft etc., and including hybrid vehicles, electronic traffic
Tool, the plug-in hybrid electric vehicles, hydrogen powered vehicle and other alternative fuel vehicles are (for example, be originated from
The fuel of resource other than petroleum).As mentioned hereinabove, hybrid vehicles are that have two or more power sources
The vehicles, for example, petrol power has the electric-powered vehicles again.
Hereinafter, exemplary embodiments of the present invention be will be described in detail with reference to the accompanying drawings.In this specification and will be under
Term or word used in claims of text description should not be construed as limited to typical or dictionary meaning, but should
The concept of term can be properly defined based on inventor and describes the principle of his/her invention in the best way, explained
For with the meaning and concept for meeting technical spirit of the invention.Therefore, the embodiment described in the description of the invention
It is only most preferred embodiment of the invention with construction shown in the drawings, does not represent all technologies essence of the invention
Mind, it will thus be appreciated that the embodiment of the various equivalents that can replace the construction and modification is all when submitting the application
It is possible.
The present invention relates to the steel discs for manufacturing electrically heated steel disc to prevent the method for coating deflection and be manufactured by this method.
In an aspect, there is provided herein the method for manufacturing electrically heated steel disc, this method may include: heat- treated steel
The heat treatment step of piece；Heat the heating stepses of the steel disc of heat treatment；The compacting of the steel disc of compacting and forming heating-forming step
Suddenly；Steel disc with cooling forming is to prevent the cooling step of coating deflection.
In the exemplary embodiment, electric heating can be carried out and applying electric current to metal plate such as steel disc.Therefore,
The ductility of steel disc can increase because of heating.In fact, this method can be provided by compacting has increased ductility
Steel disc, to improve machinability and improve intensity.Electric heating step, which can have, reduces the excellent of the manufacturing cost in heating stepses
Point, because thermal efficiency ratio uses indirect heating source higher in the prior art.
In addition, conventionally, as the coating based on Al melted in electric heating step can be to center deflection, institute
The coating based on aluminium (Al) may do not used in using electrically heated method.When being based on due to the coating deflection based on Al
Center deflection from the coating of Al to steel disc when, it may appear that various problems, for example, coating may be shelled in the central part of steel disc
From the corrosion resistance of the peripheral edge portion of steel disc reduces and coating material can be burnt in forming step.
To solve the above-mentioned problems, in the prior art, the zinc-plated diffusion annealing based on zinc (Zn) has been applied
(galva-annealed) steel disc (GA).Zinc-plated annealing diffusion steel disc based on Zn, which has, is suitable for electrically heated characteristic, still
Corrosion resistance etc. may be lower than including those of steel disc of coating based on Al.
Fig. 1 is the flow chart for manufacturing the method for hot forming steel disc according to prior art.As shown in Figure 1, in the prior art
In the conventional method of middle manufacture hot forming steel disc, it may be necessary to which gas burning or heating wire are with continuous operation.For example, successively carrying out
Blank steel disc manufacturing step (S11), heating stepses (S13), hot forming step (S15), laser reconditioning step (S17), heating step
Rapid heating time carries out 5 minutes.However, the thermal efficiency in heating stepses corresponds to 10 to 25%, this shows that the thermal efficiency is deteriorated.
Moreover, the installation space of heating device is about 4m × 25m, therefore occupies big quantity space in order to realize the prior art.Fig. 2 is
The flow chart of the method for hot forming steel disc is manufactured by electric heating according to prior art.It is existing in order to solve to describe in Fig. 1
The problem of technology, such as the thermal efficiency of deterioration are deteriorated and biggish installation space, as shown in Figure 2 including electric heating step
The method of manufacture hot forming steel disc may include the magnetic resistance heating carried out by the magnetic resistance heating device that can be run or stop on demand.
For example, the heating time in electric heating step corresponds to about 20 seconds, the thermal efficiency corresponds to about 60% to 80%, and installs magnetic resistance and add
Space needed for thermal corresponds to 3m × 4m to be installed on various positions.However, when as shown in Figure 2 including electric heating step
The method of manufacture hot forming steel disc when being applied to steel disc comprising the coating based on Al, coating is easy deflection.
Therefore, coating deflection is used for the coating material based on Zn in the prior art in order to prevent.For example, by
Have due to thick oxide layers and high density based on the coating of Zn made of coating material based on Zn and be suitable for electrically heated spy
Property.However, in the prior art in the method using indirect heating source manufacture drop stamping steel disc, the steel including the coating based on Zn
Piece is not easy to heat compared with the steel disc for including the coating based on Al, and mechanical performance can deteriorate, and the quality meeting of coating surface
Deterioration.
Fig. 3 is to show coating material, electrically heated GA coating material and the electrically heated coating based on Zn-Ni based on Al
The usable range of the spot welding of material (it is the defect occurred in the coating based on Zn).When using the coating material based on Zn,
Solderability is less than the coating material based on Al.That is, due to thick zinc oxide (ZnO) oxide skin(coating) and a possibility that generate splashing compared with
Height, and the current range of welding can be suitble to narrow.As shown in figure 3, the zinc-plated annealing diffusion steel disc tool based on Zn of electric energy heating
There is about 7.2 to an about 8.2kA current range for capableing of spot welding, and the coating based on Zn-Ni of electric energy heating has about 7.2 to about
The current range that can be welded of 8.2kA.Meanwhile the coating material based on Al is with about 6.2 to about 8.2kA spot welding of capableing of
Current range, so that compared with the coating based on Zn, carrying out spot welding has a lower electric current, and with broader current range into
Row spot welding.
However, the problem based on the coating material of Zn based on the resistance to rust difference compared with the coating based on Al.Although for example, base
Rust-preventing characteristic is maintained in early stage due to sacrificing anticorrosive property in the coating material of Zn, but uses the painting based on Zn in long-time
When layer material, rust-preventing characteristic can be deteriorated, and corrosion resistance is poor compared with the coating based on Al.Fig. 4 A-4C is to show by comparing
The surface (Fig. 4 B) on steel disc surface (Fig. 4 A), electrically heated GA including the electrically heated coating based on Al and including electrically heated
The enlarged photograph of the steel disc surface resistance to rust on the surface (Fig. 4 C) of the steel disc of the coating based on Zn-Ni.The surface of electrically heated GA
Surface with the steel disc comprising the coating based on Zn-Ni is by excessive corrosion, and the steel disc including the electrically heated coating based on Al
Surface be corroded it is less.
Compared with the coating material based on Al, based on the coating material of Zn vulnerable to the macroscopic cracking as caused by lower fusing point
With the influence of micro-crack.For example, the fusing point of zinc is about 420 DEG C, and the fusing point of aluminium is about 660 DEG C, so zinc can be in lower temperature
The lower fusing of degree.Therefore, because different melting points, Liquid Metal Embrittlement (LME) in the steel disc for including the coating based on Zn, wherein melting
Melt metal and penetrate through different types of solid metal crystal boundary, and even if shows embrittlement under low stress.Fig. 5 B is to be based on
The schematic diagram of the macroscopic cracking formed on the coating of Zn and Fig. 5 A are the amplifications of the macroscopic cracking formed on the coating based on Zn
Photo.As shown in Figure 5A, macroscopic cracking comes across in the steel disc including the coating 11 based on Zn, and as shown in Figure 5 B, when in base
When applying tension in the both direction of macroscopic cracking, it just will appear brittle fracture phenomenon.In addition, Fig. 6 B is in the painting based on Zn
The schematic diagram of the micro-crack formed on layer, and Fig. 6 A is the enlarged photograph of the micro-crack formed on the coating 11 based on Zn.Such as
Shown in Fig. 6 A, micro-crack is come across in the steel disc including the coating based on Zn.Therefore, when micro-crack comes across including based on Zn's
When on the steel disc of coating, the surface of coating is non-uniform and frictional force increases.As shown in Figure 6B, frictional force is due to micro-crack
It comes across in the steel disc including the coating based on Zn and increases.
Simultaneously as the above-mentioned coating based on Zn of electric heating, coating do not glance off.Fig. 7 A-7C is shown including base
In the steel disc surface of the coating of Al, the surface GA and include the coating based on Zn-Ni steel disc electric heating surface enlarged photograph.
Fig. 7 A is the enlarged photograph of the coating based on zinc-nickel, and Fig. 7 B is the enlarged photograph of GA, and it includes the coating based on Al that Fig. 7 C, which is,
The enlarged photograph on the electric heating surface of steel disc.Therefore, as shown in Figure 7 A-7C, the surface of GA and include the coating based on Zn-Ni
The surface of steel disc keeps good, because the deflection of coating does not occur, and the surface of the steel disc including the coating based on Al is due to electricity
It heats and glances off.However, include the steel disc of the coating based on Zn weldability and rust-preventing characteristic it is poor.Therefore, of the invention
Purpose be by determine based on the reason of coating deflection of Al provide will not be glanced off in electric heating include
The steel disc of coating based on Al.
Fig. 8 is the schematic diagram of the deflection of the coating caused by the magnetic field based on Al during showing electric heating.Painting based on Al
The deflection of layer shows that the coating material of melting can be by electromagnetic force (Lorentz force) to deflection and solidification at the center of steel disc.Such as
Shown in Fig. 8, when electromagnetic force is applied to a position, magnetic field is generated around position, and generate magnetic force towards the position.It is molten
The coating material melted passes through magnetic force to the position deflection.However, the aluminium oxide of the oxide skin(coating) due to the coating based on Al
(Al2O3) thickness it is thinner than the thickness of the zinc oxide (ZnO) for the oxide skin(coating) being formed in the coating based on Zn, by oxide skin(coating)
Caused by coating restraining force it is small, therefore the coating based on Al be easy to apply magnetic field position deflection.Specifically, due to aluminium oxide
Formed the dense oxide film with partial size more smaller than zinc oxide and have lower oxygen diffusion rate, oxide skin(coating) formation compared with
It is thin.Therefore, coating restraining force is also smaller, thus oxide skin(coating) can apply magnetic field position at deflection.Further, since aluminium is close
Degree is about 2.7g/cm3, it is less than about 7.14g/cm3Zinc density, so even if when coated with aluminum in the same amount, it is possible to create more
Big coating layer thickness, thus deflection is relatively large.Therefore, compared with the coating based on Zn, the deflection of aluminized coating is easy to happen.
Fig. 9 A-9B be wherein by electric heating there is deflection include the coating 11 based on Al steel disc 13 outside (Fig. 9 A) and in
The amplification cross-section photograph of centre part (Fig. 9 B).As shown in figs. 9 a-9b, in the steel disc 13 for including the coating 11 based on Al, due to
For coating material to the center deflection of steel disc due to electric heating, the thickness of coating is greater than the thickness of the outer edge portion of steel disc.
Therefore, in order to solve the deflection of the coating based on Al, the independent method for blocking the only electromagnetic field of coating is provided, is prevented
The only method of coating melting, and increase the method for the thickness of coating oxidation nitride layer.However, due to the independent electromagnetism for blocking only coating
Be it is practically impossible to method, solve the problems, such as this by using other methods in addition to this method.
Figure 21 is to be formed according to illustrative embodiments or manufacture electrically heated steel disc and the method that prevents coating deflection
Flow chart.Method may include: the heat treatment step (S101) for being heat-treated steel disc；Heat the heating stepses of thermally treated steel disc
(S103)；Compacting-forming step (S105) of the steel disc of compacting and forming heating；With the cooling step of the steel disc of cooling forming
(S107).Preferably, the surface of steel disc may include the coating based on Al, and coating can be through the heat treatment step and close
Aluminium-iron of aurification.In addition, by aluminum-iron alloy, coating can uitably include the Al of intermetallic compound13Fe4, and
The iron content of coating can be preferably from about 24 atom % or higher.
In addition, the temperature of heat treatment step (S101) can be about 500 DEG C to 800 DEG C, 550 DEG C to 700 DEG C, or specifically
About 600 DEG C to 660 DEG C, and the heating time of heating stepses can be performed for more than 1 minute, more than 2 minutes, more than 3 minutes, it is super
Spend 4 minutes or about 5 minutes.
Compacting-forming step (S105) and cooling step (S107) can carry out simultaneously.In addition, at cooling step (S107)
Later, method may further include the cutting step (S109) of the cooling steel disc of cutting, and cutting step (S109) can be with
It is carried out by using laser.
Compared with prior art, method may further include: the heat treatment step before electric heating step, pass through by
Steel disc including the coating based on Al is converted into the intermetallic compound based on Al-Fe and prevents cladding melts.Specifically, Figure 10
It is the curve graph for showing the state of aluminium and iron.As shown in Figure 10, the fusing point of aluminium is about 660 DEG C, and is converted through the heat treatment step
The intermetallic compound based on Al-Fe, for example, Al13Fe4Fusing point can be about 1100 DEG C or higher.Therefore, coating is molten
Point can increase and prevent from melting.In addition, the coating material based on Al can be converted into the intermetallic compound based on Al-Fe with
Thicken coating oxidation nitride layer.
For example, the coating material of the aluminium of iron and coating 101 including steel disc can expand when being heat-treated the coating based on Al
Dissipate and alloying and form the intermetallic compound based on Al-Fe, for example, Al13Fe4.When the intermetallic compound based on Al-Fe
Iron when can be diffused into coating, the fusion temperature of coating may be increased significantly, and include the superficial layer of the coating based on Al
Coating in iron content can increase to about 24 atom % or higher, even if under 1150 DEG C or lower temperature carry out electricity plus
When hot, the intermetallic compound for being based only upon Al-Fe, which can remain in, can't melt in coating and not be liquid.Therefore, will not
The deflection of coating occurs.Figure 11 A-11B be respectively according to an illustrative embodiment of the invention by electric heating steel disc 103 with
(Figure 11 A) and later the amplification cross-section photograph of (Figure 11 B) coating are prevented before the heat treatment of 101 deflection of coating.Such as Figure 11 A-11B
Shown, coating 101 can be converted into Al-Fe intermetallic compound, and iron can spread and thicken coating.
Heat treatment step can be distribution annealing furnace (BAF) method.BAF method has can be with the coil of heat- treated steel sheet material
, to improve the thermal efficiency, and compared with prior art, Equipment for Heating Processing can not need big space and be used for various skies for itself
Between the advantages of.In addition, in the heat treatment step, in order to maintain the surface quality of coating, heat treatment can be in the coating based on Al
Fusion temperature or lower, for example, about 600 to 660 DEG C at a temperature of carry out.Therefore, when in the pact for carrying out heat treatment step
When being heat-treated at a temperature of 600 to 660 DEG C, coating can be unbiased.
In other preferred aspects, there is provided herein by electric heating manufacture steel disc with prevent coating deflection method and
The steel disc for the heating being produced from it.
Electrically heated steel disc according to an illustrative embodiment of the invention can prevent the deflection of coating.As by upper
The steel disc of method manufacture is stated, steel disc can include the coating based on Al on the surface of steel disc.Coating can by steel disc iron and
The aluminium alloying of coating material, so that coating may include the Al that can be intermetallic compound13Fe4.In addition, the iron of coating contains
Amount can be 24 atom % or higher.
Embodiment
It hereinafter, will the present invention will be described in more detail by embodiment.These embodiments only for the purpose of illustration
Invention, and it will be apparent to one skilled in the art that it should be understood that the scope of the present invention is not limited to these embodiments.
In the present invention, in order to be confirmed whether to glance off, by include the coating based on Al steel disc surface at 600 DEG C
At a temperature of handle 1 to 10 minute, and by include the coating based on Al steel disc 400 DEG C at a temperature of be heat-treated 10 minutes,
And then whether glanced off after confirmation electric heating.
Figure 20 A-20B is nonheat-treated include the coating based on Al steel disc surface (Figure 20 A) and electric heating after
The enlarged photograph on the surface (Figure 20 B) of the steel disc including the coating based on Al.Firstly, it includes being based on Al that electric heating is nonheat-treated
Coating steel disc.Figure 20 A shows the surface of the nonheat-treated steel disc for including the coating based on Al, and Figure 20 B is shown
The surface (Figure 20 B) of steel disc after electric heating.As shown in fig. 20b, by electric heating it is nonheat-treated include the painting based on Al
Deflection has occurred on the steel disc of layer.
Figure 12 A to 12B be 400 DEG C at a temperature of heat treatment 10 minutes after after (Figure 12 A) and electric heating (Figure 12 B)
The enlarged photograph on the surface of the steel disc including the coating based on Al, and Figure 13 A-13B is at a temperature of 1 point of the heat treatment at 600 DEG C
(Figure 13 B) includes the enlarged photograph on the surface of the steel disc of the coating based on Al after (Figure 13 A) and electric heating after clock.In addition,
Figure 14 A-14B be 600 DEG C at a temperature of heat treatment 2 minutes after after (Figure 14 A) and electric heating (Figure 14 B) include being based on Al
Coating steel disc surface enlarged photograph, and Figure 15 A-15B be 600 DEG C at a temperature of heat treatment 3 minutes after (figure
15A) and after electric heating (Figure 15 B) includes the enlarged photograph on the surface of the steel disc of the coating based on Al.In addition, Figure 16 A-16B
Be 600 DEG C at a temperature of heat treatment 4 minutes after after (Figure 16 A) and electric heating (Figure 16 B) include the coating based on Al
The enlarged photograph on the surface of steel disc.As it is being heat-treated under the above conditions as a result, as Figure 12 A, Figure 13 A, Figure 14 A, Figure 15 A and
Shown in Figure 16 A, the intermetallic compound based on Al-Fe does not generate on the surface.In addition, as electric heating under these conditions
Steel disc including the coating based on Al as a result, as shown in Figure 12 B, Figure 13 B, Figure 14 B, Figure 15 B and Figure 16 B, in all conditions
Deflection all has occurred in lower coating.
Meanwhile Figure 17 A-18B be 600 DEG C at a temperature of heat treatment 5 minutes after (scheme after (Figure 17 A) and electric heating
17B) include the coating based on Al steel disc surface enlarged photograph.Figure 18 A-18B be 600 DEG C at a temperature of be heat-treated 6
(Figure 18 B) includes the enlarged photograph on the surface of the steel disc of the coating based on Al after (Figure 18 A) and electric heating after minute, and figure
19A-19B be 600 DEG C at a temperature of heat treatment 10 minutes after after (Figure 19 A) and electric heating after (Figure 19 B) including base
Enlarged photograph in the surface of the steel disc of the coating of Al.As shown in Figure 17 A-17B, when 600 DEG C at a temperature of carry out 5 minutes heat
When processing, the intermetallic compound based on Al-Fe is produced on the surface, and as the electrically heated of steel disc as a result, producing
Do not occur deflection on the part of the raw intermetallic compound based on Al-Fe.Similarly, as shown in Figure 18 A-18B, when at 600 DEG C
At a temperature of when carrying out heat treatment in 6 minutes, produce the intermetallic compound based on Al-Fe on surface, and as steel disc
It is electrically heated as a result, generate the intermetallic compound based on Al-Fe part on do not occur deflection.In addition, such as Figure 19 A-19B
It is shown, when 600 DEG C at a temperature of carry out heat treatment in 10 minutes when, produce the intermetallic based on Al-Fe on the surface
Object, and as the electrically heated of steel disc as a result, not occurring on the part for generating the intermetallic compound based on Al-Fe partially
Tiltedly.
Therefore, as test, the temperature of heat treatment step can be preferably 600 DEG C to 660 DEG C, and heat treatment step when
Between can be preferably 5 minutes or longer.
It compared with prior art, as described herein include that the steel disc of the coating based on Al can be before electric heating at heat
Reason, can reduce production cost, improve solderability, can improve resistance to rust or corrosion resistance, can reduce production cost, can be with
The improvement of maximum energy efficiency can reduce manufacturing cost, can simplify manufacturing method, and can easily realize extensive
Production can promote stability and the service life of material by improving corrosion resistance, and can expand the scope of application of material.
As described above, the present invention is described about various illustrative embodiments of the invention, but these
Embodiment is merely exemplary, and the present invention is not limited to this.Those skilled in the art can be to retouching above
It states and modifies and change, without departing from the scope of the present invention, and the present invention can be in the present invention and the right of following discloses
It is required that equivalent technical spirit in make various changes and modifications.
Claims (17)
1. a kind of method for manufacturing electrically heated steel disc, comprising:
It is heat-treated steel disc；
The steel disc of electric-heating heat treatment；
Suppress and shape the steel disc of heating；And
The steel disc of cooling forming.
2. according to the method described in claim 1, wherein, the surface of the steel disc includes the coating based on Al.
3. according to the method described in claim 2, wherein, the coating based on Al is the Al- by heat treatment alloying
Fe。
4. according to the method described in claim 3, wherein, the coating based on Al includes Al13Fe4Intermetallic compound.
5. according to the method described in claim 3, wherein, the iron content of the coating based on Al is big for 24 atom % or more.
6. according to the method described in claim 1, wherein, the temperature range of the heat treatment is 600 DEG C to 660 DEG C.
7. according to the method described in claim 1, wherein, the time range of the heat treatment is big for 5 minutes or more.
8. according to the method described in claim 1, wherein, the heat treatment is carried out by batch annealing furnace method.
9. according to the method described in claim 1, wherein, suppressing and shaping the steel disc of heating and the steel of cooling forming
Piece carries out simultaneously.
10. according to the method described in claim 1, further comprising: after the cooling, cutting the cooling steel disc.
11. according to the method described in claim 10, wherein, the cutting is carried out using laser.
12. a kind of steel disc, including the coating based on Al, wherein the steel disc passes through following manufacture:
It is heat-treated steel disc；
The steel disc of electric-heating heat treatment；
Suppress and shape the steel disc of heating；And
The steel disc of cooling forming.
13. steel disc according to claim 12, wherein the electric heating is to apply electric current.
14. steel disc according to claim 12, wherein the coating based on Al is by heat treatment alloying
Al-Fe。
15. steel disc according to claim 14, wherein the coating based on Al includes Al13Fe4Intermetallic
Object.
16. steel disc according to claim 15, wherein the iron content of the coating based on Al is for 24 atom % or more
Greatly.
17. a kind of vehicles comprising the steel disc described in claim 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020170124971A KR20190036119A (en) | 2017-09-27 | 2017-09-27 | Electrical heated hot forming method to protect incline of coat layer and steel sheet manufactured by the method thereof |
| KR10-2017-0124971 | 2017-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109554661A true CN109554661A (en) | 2019-04-02 |
Family
ID=65808451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711257984.1A Pending CN109554661A (en) | 2017-09-27 | 2017-12-01 | Steel disc and manufacture steel disc are in the method for protective coating deflection |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20190093189A1 (en) |
| KR (1) | KR20190036119A (en) |
| CN (1) | CN109554661A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113145760B (en) * | 2021-05-28 | 2022-02-18 | 湖南奇秀科技有限公司 | Case and bag production and processing equipment |
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- 2017-12-05 US US15/831,683 patent/US20190093189A1/en not_active Abandoned
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| Publication number | Publication date |
|---|---|
| US20190093189A1 (en) | 2019-03-28 |
| KR20190036119A (en) | 2019-04-04 |
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Application publication date: 20190402 |