CN106466697A - A kind of steel drop stamping product with aluminum or aluminum alloy coating and its manufacture method - Google Patents
A kind of steel drop stamping product with aluminum or aluminum alloy coating and its manufacture method Download PDFInfo
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- CN106466697A CN106466697A CN201610664566.3A CN201610664566A CN106466697A CN 106466697 A CN106466697 A CN 106466697A CN 201610664566 A CN201610664566 A CN 201610664566A CN 106466697 A CN106466697 A CN 106466697A
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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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- 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
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- 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
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- 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
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- 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
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- 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
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- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Coating With Molten Metal (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
A kind of manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating, comprises the steps：1) blanking：The blank of part required form will be processed into aluminum or aluminum alloy clad steel sheet using punching or laser cutting method；Described band clad steel sheet thickness is less than 2.8mm；2) blank heat treatment：Blank is put into and heats in heating furnace and be incubated, furnace temp is 900～950 DEG C, in heating furnace, atmosphere ensures that oxygen content is more than 15%, blank total time of staying in heating furnace is 2.5～10 minutes；3) blank transmission：Blank after heating is quickly sent in mould and carries out punching press, transmission time is 4～12 seconds it is ensured that the blank temperature before punching press is 680～750 DEG C；4) blank drop stamping：Hot blank is directly stamping in a mold, in stamping process, mould is cooled it is ensured that the surface temperature of punching press front mold is less than 100 DEG C.
Description
Technical field
The present invention relates to drop stamping product and its manufacture method are and in particular to be a kind of steel with aluminum or aluminum alloy coating
Heat stamping products and its manufacture method.
Background technology
In recent years, the high-strength thinning, Main Trends of The Development of energy-saving and emission-reduction always automobile industry, wherein, drop stamping is real
A kind of usual way of existing product high strengthening, it is high-strength to realize product by way of heat treatment and hot forming combine
Degree.Conventional drop stamping product mainly has：About forward and backward door, crash bar (beam), forward and backward bumper, A column reinforcement plate, B post are strengthened
Plate, C column reinforcement plate, the safety knot component such as passage, roof buttress brace in floor, these drop stamping products have that intensity is high, shape
The features such as complicated, formability is good, high dimensional accuracy, resilience are little.According to the military service situation of part, drop stamping steel surface state is divided
For bare board and the steel plate with coating, because the drop stamping steel plate with coating can save at the shot-peening after drop stamping with respect to bare board
Reason, is just increasingly taken seriously.The most frequently used aluminum or aluminum alloy coating drop stamping steel and Zn-based plating layer drop stamping steel, due to zinc
Base coating can produce the crackle of matrix, therefore commonly using at present or aluminum or aluminum alloy coating drop stamping steel.
Chinese patent CN101583486 discloses drop stamping product and the method for coated steel band, including heating, transfer and
Cooling, and it is not directed to hot stamping operation, including the punching press such as mould closure pressing speed, dwell time parameter, punching press thus can be caused to produce
Quality is unstable, such as tightens, ftractures etc., oven cavity atmosphere in heating process not being controlled, leads to furnace atmosphere in heating process
Change, especially oxygen content occurs large change, brings product appearance color to be easy to change, actual production is sent out
Under same technique, gained stamping products appearance color assumes relatively big difference to existing identical supplied materials.
Chinese patent CN100370054 discloses aluminizing or aluminum-system steel plate of high intensity, it is emphasised that how to control
Cr in coating processed, Mn content is more than 0.1% and the impact to product corrosion resistance, thermostability, is also not directed to hot stamping operation.
Chinese patent CN104384283 discloses a kind of hot press-formed technique of 22MnB5 high-strength steel sheet, for
Mainly bare board drop stamping steel, and punching course do not illustrate.
What Chinese patent CN103212950 was directed to is also bare board drop stamping product, also includes later stage shot-peening etc. and processes.
Content of the invention
For the existing deficiency with aluminum or aluminum alloy coating drop stamping product made from steel and method, it is an object of the invention to carrying
Go out a kind of more excellent steel drop stamping product with aluminum or aluminum alloy coating and manufacture method, described band coating drop stamping
The features such as product has that intensity is high, complex-shaped, formability is good, high dimensional accuracy, resilience are little, can be used for auto parts and components, example
As logical in, crash bar (beam) about forward and backward door, forward and backward bumper, A column reinforcement plate, B column reinforcement plate, C column reinforcement plate, floor
The safety knot components such as road, roof buttress brace.
For reaching above-mentioned purpose, the technical scheme is that：
A kind of manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating, it comprises the steps：
1) blanking：Band aluminum or aluminum alloy clad steel sheet is processed into shape needed for part using punching or laser cutting method
The blank of shape；Described band clad steel sheet thickness is less than 2.8mm；
2) blank heat treatment：Blank is put into and heats in heating furnace and be incubated, furnace temp is 900～950 DEG C, heating
In stove, atmosphere ensures that oxygen content is more than 15%, and blank total time of staying in heating furnace is 2.5～10 minutes；
3) blank transmission：Blank after heating is quickly sent in mould and carries out punching press, transmission time is 4～12 seconds,
Ensure that the blank temperature before punching press is 680～750 DEG C；
4) blank drop stamping：Hot blank is directly stamping in a mold, in stamping process, mould is cooled down
Cooling is it is ensured that the surface temperature of punching press front mold is less than 100 DEG C.
Further, the described composition by weight percent with clad steel sheet is：C：0.08～0.8%, Si：0.05～
1.0%, Mn：0.1～5%, P<0.3%, S<0.1%, Al<0.3%, Ti<0.5%, B：0.0005～0.1%, Cr：0.01～
3%, remaining is Fe and inevitable impurity.
Preferably, the described composition by weight percent with clad steel sheet is：C：0.1～0.6%, Si：0.07～
0.7%, Mn：0.3～4%, P<0.2%, S<0.08%, Al<0.2%, Ti<0.4%, B：0.0005～0.08%, Cr：0.01
～2%, remaining is Fe and inevitable impurity.
Preferably, the described composition by weight percent with clad steel sheet is：C：0.15～0.5%, Si：0.1～
0.5%, Mn：0.5～3%, P<0.1%, S<0.05%, Al<0.1%, Ti：<0.2%, B：0.0005～0.08%, Cr：
0.01～1%, remaining is Fe and inevitable impurity.
Preferably, described coating is pure aluminum or aluminum alloy, for the Ingredients Weight of the hot dipping plating solution of steel plate coating plating layer
Percentage ratio is：Si：5～11%, Fe：0～4%, balance of aluminum and inevitable impurity.
Preferably, described coating is pure aluminum or aluminum alloy, for the Ingredients Weight of the hot dipping plating solution of steel plate coating plating layer
Percentage ratio is：Si：9～10%, Fe：2～4%, balance of aluminum and inevitable impurity.
Preferably, measured by the described upper and lower surface with clad steel sheet, upper and lower surface width various location
In the middle of thickness of coating value, the difference of maxima and minima is less than 5 μm.
Preferably, described step 2) in, heating furnace atmosphere is the gaseous mixture that air or air are formed with noble gases
Body, in atmosphere, oxygen content is consistently greater than 15%.
Preferably, described step 2) in, furnace temp is 900～950 DEG C, and preferably furnace temp is 935～950
DEG C or 945～950 DEG C.
Preferably, described step 2) in heating residing time in furnace be 2.5～10min, when stopping preferably in heating furnace
Between be 2.5～5min.
Preferably, described band aluminum or aluminum alloy coating steel plate thickness<During 1.5mm, furnace temp is 900～950
DEG C, heating residing time in furnace is 2.5～10min；It is preferably：Furnace temp is 900～930 DEG C, when stopping in heating furnace
Between be 3～10min；Or, furnace temp is 935～950 DEG C, heating residing time in furnace is 2.5～5min；Or, heating furnace
Temperature is 945～950 DEG C, and heating residing time in furnace is 2.5～5min.
Preferably, when described band aluminum or aluminum alloy coating steel plate thickness are 1.5～2.0mm, furnace temp is 900
～950 DEG C, heating residing time in furnace is 2.5～10min；It is preferably：Furnace temp is 900～930 DEG C, stops in heating furnace
The time is stayed to be 3～10min；Or, furnace temp is 935～950 DEG C, heating residing time in furnace is 2.5～6min；Or, plus
Hot furnace temperature is 945～950 DEG C, and heating residing time in furnace is 2.5～5min.
Preferably, when described band aluminum or aluminum alloy coating steel plate thickness are 2.0～2.8mm, furnace temp is 900
～950 DEG C, heating residing time in furnace is 2.5～10min；It is preferably：Furnace temp is 900～930 DEG C, stops in heating furnace
The time is stayed to be 3.5～10min；Or, furnace temp is 935～950 DEG C, heating residing time in furnace is 2.5～6min；Or,
Furnace temp is 945～950 DEG C, and heating residing time in furnace is 2.5～5min.
Preferably, described step 2) during blank heating, heating-up temperature adopts induction heating mode for more than 700 DEG C.
Preferably, described step 4) in, mould closure pressing speed 30～150mm/s, preferably 50～100mm/ during punching press
s.
Preferably, described step 4) in, in punching course, continue pressurize quenching 4～20s after mould matched moulds, to part
The pressurize pressure applying averagely need to be more than 8MPa in piece surface.
Preferably, described step 4) in, the mould steel material used by mould is：Thermal diffusion coefficient when 700 DEG C is big
In 3.8m2/s.
Preferably, described step 4) in, in stamping process, mould being cooled, it is cold to be arranged using mould inside
But system or adopt the natural type of cooling.
Preferably, described step 4) in, stamping after part be cooled to less than 300 DEG C.
Preferably, described step 4) in, after punching press, steel plate microstructure accounts for more than 95% for martensitic structure, and tension is strong
Degree is more than 1300MPa.
Preferably, described step 4) in, comprise alloy-layer and surface layer in coating after punching press, alloy layer thickness is less than
16 μm, coating gross thickness is less than 50 μm.
The steel drop stamping product that manufacture method of the present invention obtains, it is band clad steel sheet, in surface of steel plate coated with aluminum or
Aluminum alloy coating, described steel plate composition by weight percent is：C：0.08～0.8%, Si：0.05～1.0%, Mn：0.1～
5%, P<0.3%, S<0.1%, Al<0.3%, Ti<0.5%, B：0.0005～0.1%, Cr：0.01～3%, remaining be Fe and
Inevitable impurity.
Preferably, the described composition by weight percent with clad steel sheet is：C：0.1～0.6%, Si：0.07～
0.7%, Mn：0.3～4%, P<0.2%, S<0.08%, Al<0.2%, Ti<0.4%, B：0.0005～0.08%, Cr：0.01
～2%, remaining is Fe and inevitable impurity.
Preferably, the described composition by weight percent with clad steel sheet is：C：0.15～0.5%, Si：0.1～
0.5%, Mn：0.5～3%, P<0.1%, S<0.05%, Al<0.1%, Ti：<0.2%, B：0.0005～0.08%, Cr：
0.01～1%, remaining is Fe and inevitable impurity.
Preferably, described coating comprises alloy-layer and surface layer, and alloy layer thickness is less than 16 μm, and coating gross thickness is not
More than 50 μm.
Preferably, described coating from steel substrate outwards, comprise alloy-layer, the intermetallic compounds layer of rich Al, intermediate layer,
Surface layer, alloy-layer predominant quantity percentage ratio is：Si：0-6%, Fe：75-96%, Al：2-12%；The metal of rich Al
Between compound layer predominant quantity percentage ratio be：Si：0-2%, Fe：30-50%, Al：40-60%；Intermediate layer mainly becomes
Point percentage by weight be：Si：2-6%, Fe：50-65%, Al：20-35%；Surface layer predominant quantity percentage ratio is：
Si：2-6%, Fe：50-65%, Al：20-35%.
Preferably, described coating from steel substrate outwards, comprise alloy-layer, the intermetallic compounds layer of rich Al, intermediate layer,
Surface layer, alloy-layer predominant quantity percentage ratio is：Si：0-6%, Fe：75-96%, Al：2-12%；The metal of rich Al
Between compound layer predominant quantity percentage ratio be：Si：0-2%, Fe：30-50%, Al：40-60%；Intermediate layer mainly becomes
Point percentage by weight be：Si：2-6%, Fe：50-65%, Al：20-35%；Surface layer predominant quantity percentage ratio is：
Si：2-6%, Fe：50-65%, Al：20-35%.
Preferably, the microstructure of described steel plate accounts for more than 95% for martensitic structure, and tensile strength is more than
1300MPa.
Coating microstructure with clad steel sheet of the present invention is divided into alloy-layer and surface layer, and alloy-layer is and substrate phase
Adjacent transition zone, there is highly alloyed formation with substrate ferrum in this layer, on alloy-layer, its composition is depending on selected for surface layer
Plating solution forms.
Band clad steel sheet overlay coating thickness requirement of the present invention has good uniformity, and refers to steel plate coating thickness same
One imposes a condition down, in the middle of the thickness of coating value measured by steel plate upper and lower surface, upper and lower surface width various location,
Big value is less than 5 μm with the difference of minima.
Step 2 described in the inventive method) middle heating furnace atmosphere is air or air is mixed with what noble gases formed
Close gas, during production and application, in atmosphere, oxygen content is consistently greater than relative constancy in 15%, and production process, not enough
When 15%, can suitably be supplemented as needed, otherwise may be affected formation and the distribution of coating surface oxide, and final shadow
Ring product appearance, be the most directly impact product colour.
Step 4 of the present invention) in, mould closure pressing speed 30～150mm/s during punching press so that part can guarantee that good
Forming property, reduces the generation of the stamping defects such as cracking, necking down.
Step 4 of the present invention) part is cooled to less than 300 DEG C, makes inside parts structural transformation be needed for target part
The organizational structure wanted, keeps part still to keep good size shape in cooling procedure simultaneously.
Drop stamping product quality and punching course are closely related, and punching course parameter is unstable or not good, will directly affect
Stamping products quality, the stamping products defect such as tightening, ftracture will happen occasionally.Meanwhile, typically in air in existing punching course
In carry out, oven cavity atmosphere is uncontrolled, and in punching course, product surface can aoxidize in burner hearth, causes oven cavity atmosphere such as
Oxygen content changes, and oxygen content change will affect final products oxidation products composition, and then affect product appearance color,
Bring product appearance irregular colour even or inconsequent.Further, in hot stamping operation, the temperature of mould is higher, panel surface
There is oxide skin, the rate of cooling of plate can be made to reduce, Malpighian layer is thicker, hydraulic performance decline, the deterioration of panel surface, such as
Document《Investigation of materials journal》2014 2 months volume 28 the 2nd the phase report " in hot stamping operation, cooling rate is to high strength and ductility boron steel
The impact of energy ".
For solving the above problems, the present invention is specialized in, and especially hot stamping operation parameter and oven cavity atmosphere is entered
Go optimization；In addition, mold temperature in room temperature or less than 50 DEG C it is ensured that more high cooldown rate, thus lifting heat-punch member
Surface and product combination property.
Beneficial effects of the present invention：
The present invention adopts same band clad steel sheet gained stamping products appearance color, pattern in same hot stamping operation
Uniformity, will not or seldom can tighten, necking down, the defect such as cracking.
Band coating drop stamping product of the present invention has that intensity is high, complex-shaped, formability is good, high dimensional accuracy,
The features such as resilience is little, can be used for auto parts and components, and for example, about forward and backward door, crash bar (beam), forward and backward bumper, A post are strengthened
Plate, B column reinforcement plate, C column reinforcement plate, the safety knot component such as passage, roof buttress brace in floor.
Brief description
Fig. 1 is existing band coating drop stamping product appearance, identical supplied materials, identical drop stamping technique, gained drop stamping product
Outward appearance assumes relatively big difference；
Fig. 2 is existing band coating drop stamping product different colours piece surface photo；
Fig. 3 is drop stamping product appearance photo described in the embodiment of the present invention 1；
Fig. 4 is the metallographic of drop stamping product coating section described in the embodiment of the present invention 1；
Fig. 5 is the metallographic of drop stamping product coating section described in the embodiment of the present invention 2；
Fig. 6 is drop stamping product surface SEM pattern described in the embodiment of the present invention 3；
Fig. 7 is the SEM pattern of drop stamping product coating section described in the embodiment of the present invention 8.
Specific embodiment
With reference to the accompanying drawings and examples the present invention is done further.
Table 1 is the composition of embodiment of the present invention steel plate；Table 2 is the manufacturing process of the embodiment of the present invention；Table 3 show this
The performance of bright drop stamping product embodiments.
Embodiment 1
1.2mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：8.5%, Fe：2.6%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, 950 DEG C of furnace temp, stops
Time 3.5min, furnace atmosphere oxygen content is to transmit to mould in 20%, 10s, closure pressing speed 100mm/s, dwell time 10s,
Dwell pressure 10MPa, products obtained therefrom outward appearance is as shown in figure 3, the microstructure of coating section is as shown in figure 4, gained drop stamping product base
In plate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 450,43 μm of coating gross thickness, 12 μm of alloy layer thickness.
Embodiment 2
0.9mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：8.3%, Fe：2.4%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, 940 DEG C of furnace temp, stops
Time 5min, furnace atmosphere oxygen content is to transmit to mould, closure pressing speed 50mm/s, dwell time 4s, pressurize pressure in 22%, 5s
Power 8MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 97%, and hardness HV10 is 480, coating gross thickness
50 μm, 15 μm of alloy layer thickness, the microstructure of coating section is as shown in Figure 5.
Embodiment 3
1.0mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：9.0%, Fe：2.7%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, 930 DEG C of furnace temp, stops
Time 7min, furnace atmosphere oxygen content is to transmit to mould, closure pressing speed 70mm/s, dwell time 6s, pressurize pressure in 18%, 8s
Power 12MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 96%, and hardness HV10 is 490, coating gross thickness
41 μm, 11 μm of alloy layer thickness.Fig. 6 is drop stamping product surface SEM pattern, from fig. 6, it can be seen that in the embodiment of the present invention 3
Described drop stamping product SEM pattern, surface presence is necessarily uneven, is conducive to follow-up application.
Embodiment 4
0.9mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：8.8%, Fe：2.7%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, 920 DEG C of furnace temp, stops
Time 7min, furnace atmosphere oxygen content is to transmit to mould, closure pressing speed 70mm/s, dwell time 6s, pressurize pressure in 20%, 8s
Power 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 98%, and hardness HV10 is 440, coating gross thickness
39 μm, 10 μm of alloy layer thickness.
Embodiment 5
1.1mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：10%, Fe：3.5%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, and 935 DEG C of furnace temp, during stop
Between 4.5min, furnace atmosphere oxygen content be 22%, 7s in transmit to mould, upper/lower die closure pressing speed 80mm/s, dwell time
5s, dwell pressure 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 460,
41 μm of coating gross thickness, 11 μm of alloy layer thickness.
Embodiment 6
1.5mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：10%, Fe：3.5%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, and 935 DEG C of furnace temp, during stop
Between 5min, furnace atmosphere oxygen content is to transmit to mould in 22%, 7s, upper/lower die closure pressing speed 80mm/s, dwell time 5s,
Dwell pressure 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 461, coating
42 μm of gross thickness, 11 μm of alloy layer thickness.
Embodiment 7
1.8mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：10%, Fe：3.5%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, and 945 DEG C of furnace temp, during stop
Between 2.5min, furnace atmosphere oxygen content be 22%, 7s in transmit to mould, upper/lower die closure pressing speed 80mm/s, dwell time
5s, dwell pressure 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 470,
40 μm of coating gross thickness, 9 μm of alloy layer thickness.
Embodiment 8
2.0mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：10%, Fe：3.5%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, and 940 DEG C of furnace temp, during stop
Between 3min, furnace atmosphere oxygen content is to transmit to mould in 22%, 7s, upper/lower die closure pressing speed 80mm/s, dwell time 5s,
Dwell pressure 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 480, coating
40 μm of gross thickness, 11 μm of alloy layer thickness.As shown in fig. 7, it is drop stamping product coating section SEM pattern, described coating
From steel substrate 100 outwards, alloy-layer 1, the intermetallic compounds layer 2 of rich Al, intermediate layer 3, surface layer 4 are comprised.
Embodiment 9
2.4mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：10%, Fe：3.5%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, and 935 DEG C of furnace temp, during stop
Between 5min, furnace atmosphere oxygen content is to transmit to mould in 22%, 7s, upper/lower die closure pressing speed 80mm/s, dwell time 5s,
Dwell pressure 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 460, coating
42 μm of gross thickness, 12 μm of alloy layer thickness.
Embodiment 10
2.8mm is become the blank of certain size and shape with aluminum alloy coating Steel plate laser blanking, hot-dip plating solution forms
Si：10%, Fe：3.5%, remaining is aluminum and inevitable impurity, and blank enters heating furnace, and 950 DEG C of furnace temp, during stop
Between 2.5min, furnace atmosphere oxygen content be 20%, 7s in transmit to mould, upper/lower die closure pressing speed 80mm/s, dwell time
5s, dwell pressure 15MPa.In gained drop stamping product substrate microstructure, ratio of martensite is higher than 95%, and hardness HV10 is 460,
40 μm of coating gross thickness, 8 μm of alloy layer thickness.
It will be seen from figure 1 that the aluminum silicon cladding supplied materials of same size, through identical drop stamping technique, gained drop stamping is produced
Product appearance color assumes relatively big difference, and color has field gray, blueness, yellow, bluish violet etc..
Figure it is seen that the existing drop stamping product with aluminum silicon cladding presents obvious color under metallurgical microscope
Different.
From figure 3, it can be seen that the appearance color under identical drop stamping technique of drop stamping product described in the embodiment of the present invention 1
Relatively uniformity, assumes pewter.
Can be seen that the coating section thickness of drop stamping product described in embodiment of the present invention 1-2 from Fig. 4, Fig. 5 uniformly to connect
Continue, alloy-layer and thickness of coating meet the requirements.
Table 1 steel plate composition by weight percent (wt%)
| Embodiment | C | Si | Mn | P | S | Al | Ti | B | Cr |
| 1 | 0.15 | 0.10 | 2.90 | 0.059 | 0.038 | 0.09 | 0.090 | 0.0031 | 0.15 |
| 2 | 0.25 | 0.23 | 1.19 | 0.015 | 0.001 | 0.04 | 0.030 | 0.0040 | 0.27 |
| 3 | 0.49 | 0.50 | 2.51 | 0.024 | 0.04 | 0.08 | 0.027 | 0.0052 | 0.51 |
| 4 | 0.39 | 0.36 | 3.00 | 0.044 | 0.03 | 0.07 | 0.05 | 0.0062 | 0.71 |
| 5 | 0.50 | 0.48 | 0.50 | 0.081 | 0.02 | 0.05 | 0.20 | 0.0071 | 0.20 |
| 6 | 0.15 | 0.10 | 2.90 | 0.059 | 0.038 | 0.09 | 0.090 | 0.0031 | 0.15 |
| 7 | 0.25 | 0.23 | 1.19 | 0.015 | 0.001 | 0.04 | 0.030 | 0.0040 | 0.27 |
| 8 | 0.49 | 0.50 | 2.51 | 0.024 | 0.04 | 0.08 | 0.027 | 0.0052 | 0.51 |
| 9 | 0.39 | 0.36 | 3.00 | 0.044 | 0.03 | 0.07 | 0.05 | 0.0062 | 0.71 |
| 10 | 0.50 | 0.48 | 0.50 | 0.081 | 0.02 | 0.05 | 0.20 | 0.0071 | 0.20 |
Table 2
Table 3
Claims (28)
1. a kind of manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating, is characterized in that, comprise the steps：
1) blanking：With aluminum or aluminum alloy clad steel sheet, part required form will be processed into using punching or laser cutting method
Blank；Described band clad steel sheet thickness is less than 2.8mm；
2) blank heat treatment：Blank is put into and heats in heating furnace and be incubated, furnace temp is 900～950 DEG C, in heating furnace
Atmosphere ensures that oxygen content is more than 15%, and blank total time of staying in heating furnace is 2.5～10 minutes；
3) blank transmission：Blank after heating is quickly sent in mould and carries out punching press, transmission time be 4～12 seconds it is ensured that
Blank temperature before punching press is 680～750 DEG C；
4) blank drop stamping：Hot blank is directly stamping in a mold, in stamping process, mould is cooled,
Guarantee that the surface temperature of punching press front mold is less than 100 DEG C.
2. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
The described composition by weight percent with clad steel sheet is：C：0.08～0.8%, Si：0.05～1.0%, Mn：0.1～5%, P
<0.3%, S<0.1%, Al<0.3%, Ti<0.5%, B：0.0005～0.1%, Cr：0.01～3%, remaining is Fe and can not
Avoid impurity.
3. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
The described composition by weight percent with clad steel sheet is：C：0.1～0.6%, Si：0.07～0.7%, Mn：0.3～4%, P<
0.2%, S<0.08%, Al<0.2%, Ti<0.4%, B：0.0005～0.08%, Cr：0.01～2%, remaining is Fe and can not
Avoid impurity.
4. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
The described composition by weight percent with clad steel sheet is：C：0.15～0.5%, Si：0.1～0.5%, Mn：0.5～3%, P<
0.1%, S<0.05%, Al<0.1%, Ti<0.2%, B：0.0005～0.08%, Cr：0.01～1%, remaining is Fe and can not
Avoid impurity.
5. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
Described coating is pure aluminum or aluminum alloy, and the composition by weight percent for the hot dipping plating solution of steel plate coating plating layer is：Si：5～
11%, Fe：0～4%, balance of aluminum and inevitable impurity.
6. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
Described coating is pure aluminum or aluminum alloy, and the composition by weight percent for the hot dipping plating solution of steel plate coating plating layer is：Si：9～
10%, Fe：2～4%, balance of aluminum and inevitable impurity.
7. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
In the middle of thickness of coating value measured by the described upper and lower surface with clad steel sheet, upper and lower surface width various location,
The difference of maxima and minima is less than 5 μm.
8. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1, is characterized in that,
Described step 2) in, heating furnace atmosphere is the mixed gas that air or air are formed with noble gases, and in atmosphere, oxygen contains
Amount is consistently greater than 15%.
9. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as described in claim 1 or 8, its feature
It is, described step 2) in, furnace temp is 900～950 DEG C, and preferably furnace temp is 935～950 DEG C or 945～950
℃.
10. the manufacture method of the steel drop stamping product with aluminum or aluminum alloy coating as described in claim 1 or 8 or 9, its
Feature is, described step 2) in heating residing time in furnace be 2.5～10min, preferably heating residing time in furnace be 2.5～
5min.
The manufacture method of the 11. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 1 or 8 or 9, its
Feature is, described band aluminum or aluminum alloy coating steel plate thickness<During 1.5mm, furnace temp is 900～950 DEG C, heating furnace
The interior time of staying is 2.5～10min；It is preferably：Furnace temp is 900～930 DEG C, heating residing time in furnace is 3～
10min；Or, furnace temp is 935～950 DEG C, heating residing time in furnace is 2.5～5min；Or, furnace temp is
945～950 DEG C, heating residing time in furnace is 2.5～5min.
The manufacture method of the 12. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 1 or 8 or 9, its
Feature is, when described band aluminum or aluminum alloy coating steel plate thickness are 1.5～2.0mm, furnace temp is 900～950 DEG C,
Heating residing time in furnace is 2.5～10min；It is preferably：Furnace temp is 900～930 DEG C, and heating residing time in furnace is
3～10min；Or, furnace temp is 935～950 DEG C, heating residing time in furnace is 2.5～6min；Or, furnace temp
It it is 945～950 DEG C, heating residing time in furnace is 2.5～5min.
The manufacture method of the 13. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 1 or 8 or 9, its
Feature is, when above-mentioned band aluminum or aluminum alloy coating steel plate thickness are 2.0～2.8mm, furnace temp is 900～950 DEG C,
Heating residing time in furnace is 2.5～10min；It is preferably：Furnace temp is 900～930 DEG C, and heating residing time in furnace is
3.5～10min；Or, furnace temp is 935～950 DEG C, heating residing time in furnace is 2.5～6min；Or, heating furnace temperature
Degree is 945～950 DEG C, and heating residing time in furnace is 2.5～5min.
The manufacture method of 14. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 1, its feature
It is, described step 2) during blank heating, heating-up temperature adopts induction heating mode for more than 700 DEG C.
The manufacture method of 15. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 1, its feature
It is, described step 4) in, mould closure pressing speed 30～150mm/s, preferably 50～100mm/s during punching press.
The manufacture method of the 16. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 1 or 15, it is special
Levying is, described step 4) in, in punching course, continue pressurize after mould matched moulds and quench 4～20s, the pressurize that part is applied
Pressure averagely need to be more than 8MPa in piece surface.
The manufacture method of the 17. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 1 or 15 or 16,
It is characterized in that, described step 4) in, the mould steel material used by mould is：Thermal diffusion coefficient when 700 DEG C is more than
3.8m2/s.
The manufacture of the 18. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 1 or 15 or 16 or 17
Method, is characterized in that, described step 4) in, in stamping process, mould is cooled and cooling is arranged using mould inside
System or adopt the natural type of cooling.
The manufacture method of 19. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 1, its feature
Be, described step 4) in, stamping after part be cooled to less than 300 DEG C.
The manufacture method of 20. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 1, its feature
It is, described step 4) in, after punching press, steel plate microstructure accounts for more than 95% for martensitic structure, and tensile strength is more than
1300MPa.
The manufacture method of 21. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 1, its feature
It is, described step 4) in, comprise alloy-layer and surface layer in coating after punching press, alloy layer thickness is less than 16 μm, and coating is total
Thickness is less than 50 μm.
22. manufacture methods passing through the steel drop stamping product with aluminum or aluminum alloy coating as claimed in claim 1 obtain
Steel drop stamping product, it is characterized in that, it is band clad steel sheet, in surface of steel plate coated with aluminum or aluminum alloy coating, described
Steel plate composition by weight percent is：C：0.08～0.8%, Si：0.05～1.0%, Mn：0.1～5%, P<0.3%, S<
0.1%, Al<0.3%, Ti<0.5%, B：0.0005～0.1%, Cr：0.01～3%, remaining is Fe and inevitable impurity.
23. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 22, is characterized in that, described band
The composition by weight percent of clad steel sheet is：C：0.1～0.6%, Si：0.07～0.7%, Mn：0.3～4%, P<0.2%, S<
0.08%, Al<0.2%, Ti<0.4%, B：0.0005～0.08%, Cr：0.01～2%, remaining is Fe and unavoidably miscellaneous
Matter.
24. steel drop stamping products with aluminum or aluminum alloy coating as claimed in claim 22, is characterized in that, described band
The composition by weight percent of clad steel sheet is：C：0.15～0.5%, Si：0.1～0.5%, Mn：0.5～3%, P<0.1%, S<
0.05%, Al<0.1%, Ti：<0.2%, B：0.0005～0.08%, Cr：0.01～1%, remaining is Fe and unavoidably miscellaneous
Matter.
The 25. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 22 or 23 or 24, is characterized in that,
Described coating comprises alloy-layer and surface layer, and alloy layer thickness is less than 16 μm, and coating gross thickness is less than 50 μm.
The 26. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 22 or 23 or 24 or 25, it is special
Levying is, described coating from steel substrate outwards, comprises alloy-layer, the intermetallic compounds layer of rich Al, intermediate layer, surface layer, closes
Layer gold predominant quantity percentage ratio is：Si：0-6%, Fe：75-96%, Al：2-12%；The intermetallic compounds layer of rich Al
Predominant quantity percentage ratio is：Si：0-2%, Fe：30-50%, Al：40-60%；Intermediate layer predominant quantity hundred
Point ratio is：Si：2-6%, Fe：50-65%, Al：20-35%；Surface layer predominant quantity percentage ratio is：Si：2-6%,
Fe：50-65%, Al：20-35%.
The 27. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 22 or 23 or 24, is characterized in that,
In the middle of thickness of coating value measured by the described upper and lower surface with clad steel sheet, upper and lower surface width various location,
The difference of maxima and minima is less than 5 μm.
The 28. steel drop stamping products with aluminum or aluminum alloy coating as described in claim 22 or 23 or 24 or 27, it is special
Levying is, the microstructure of described steel plate accounts for more than 95% for martensitic structure, and tensile strength is more than 1300MPa.
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| CN110965002B (en) * | 2019-12-31 | 2022-04-15 | 马鞍山钢铁股份有限公司 | Mg-Al-Si alloy system coated steel plate with wide hot forming heating process window and preparation and hot stamping forming process thereof |
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| CN111020296A (en) * | 2019-12-31 | 2020-04-17 | 马鞍山钢铁股份有限公司 | Ni-Al-Si alloy system coated steel plate with wide hot forming heating process window and preparation and hot stamping forming process thereof |
| CN110965002A (en) * | 2019-12-31 | 2020-04-07 | 马鞍山钢铁股份有限公司 | Mg-Al-Si alloy system coated steel plate with wide hot forming heating process window and preparation and hot stamping forming process thereof |
| CN111515287B (en) * | 2020-05-19 | 2022-04-08 | 湖南晓光汽车模具有限公司 | Cascade hot stamping forming method of ultrahigh-strength steel plate |
| CN111515287A (en) * | 2020-05-19 | 2020-08-11 | 湖南晓光智能成型制造有限公司 | Cascade hot stamping forming method of ultrahigh-strength steel plate |
| CN114807739A (en) * | 2021-01-28 | 2022-07-29 | 宝山钢铁股份有限公司 | Aluminum-plated steel plate, hot-formed part and manufacturing method |
| WO2022247815A1 (en) * | 2021-05-27 | 2022-12-01 | 马鞍山钢铁股份有限公司 | Hot-formed steel having blue or light blue aluminum alloy plating layer, hot forming process, and hot-formed part |
| WO2023066087A1 (en) | 2021-10-21 | 2023-04-27 | 香港大学 | Hot stamping forming method for pre-coated steel plate |
| CN116219271A (en) * | 2022-07-22 | 2023-06-06 | 宝山钢铁股份有限公司 | Aluminum-silicon plated steel sheet, thermoformed part and manufacturing method thereof |
| CN116219271B (en) * | 2022-07-22 | 2024-01-09 | 宝山钢铁股份有限公司 | Aluminum-silicon plated steel sheet, thermoformed part and manufacturing method thereof |
| CN115475832A (en) * | 2022-10-11 | 2022-12-16 | 东北大学 | Production process for improving bending property of Al-Si coating hot forming steel through cold rolling |
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