CN102343392A - Preparation method of ferritic stainless steel die with hard film structure - Google Patents
Preparation method of ferritic stainless steel die with hard film structure Download PDFInfo
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- CN102343392A CN102343392A CN201110158309XA CN201110158309A CN102343392A CN 102343392 A CN102343392 A CN 102343392A CN 201110158309X A CN201110158309X A CN 201110158309XA CN 201110158309 A CN201110158309 A CN 201110158309A CN 102343392 A CN102343392 A CN 102343392A
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- spraying
- stainless steel
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- dura mater
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Abstract
The invention relates to a preparation method of a ferritic stainless steel die with a hard film structure, and the method comprises the following steps: providing the ferritic stainless steel die as a substrate, and preprocessing the surface to be treated of the substrate; applying an intermediate transition layer, wherein the intermediate layer is an FeCrAlY coating; and applying a surface coating with the hard film structure, wherein the surface coating with the hard film structure contains SiC, Si3N4 and B. By adopting the die in the structure according to the application, the service life of the die can be prolonged, and the use performances of the die can be increased.
Description
Technical field
The present invention relates to a kind of preparation method of metal die, in particular, relate to a kind of preparation method with ferrite stainless steel mold of dura mater structure.
Background technology
Mould is widely used in punch forming processing.Generally need have following performance for stamping forming mould:
(1) under the hot environment, has good rigidity, anti-mechanical impact strength and high hardness.
(2) repeatedly and under the thermal shock of Fast Heating cooling, mould does not crack or is out of shape.
(3) under the hot conditions, chemical reaction does not take place in molding surface and forming metal.
(4) the high-temperature oxydation phenomenon can not take place in mould under hot conditions.
(5) good processability, the surface that is prone to be processed into high accuracy and high surface finish.
Traditional mould that is used to pour into a mould materials such as refractory metal or glass adopts stainless steel or Refractoloy steel as mold materials mostly; But high-temperature oxydation takes place in this mould easily; Under thermal cycle effect repeatedly; The inside crystal phase structure of material changes; And surface quality is variation also, thereby causes mould to lose efficacy easily.
In order to address the above problem, the metal oxide ceramic particle of hard and superhard alloy are used to mfg. moulding die.But, be difficult to be processed into required given shape because described material hardness is very high.So with superhard alloy or high-temperature alloy is die matrix, the composite construction mould that forms wear-resisting, high-temperature corrosion resistance on its surface or have a coating of other property becomes the new direction of industry development.
Summary of the invention
The object of the present invention is to provide a kind of preparation method with ferrite stainless steel mold of dura mater structure, this method can be used for improving the molding performance of ferrite stainless steel mold and the service life of this mould of significant prolongation.
To achieve these goals, the present invention at first provides a kind of preparation method with ferrite stainless steel mold of dura mater structure, and it may further comprise the steps:
(1) provides a kind of ferrite stainless steel mold as substrate, pre-treatment is carried out on the surface that substrate is pending;
(2) apply one deck intermediate layer, described intermediate layer is the FeCrAlY coating;
(3) apply the face coat with dura mater structure, the face coat of described dura mater structure comprises SiC, Si
3N
4And B.
Wherein, Comprise the greasy dirt of removing substrate surface and the step of oxide layer at the pre-treatment step described in the step (1); It can use pre-treating technology commonly known in the art, for example uses alkali cleaning, pickling etc., preferably uses plasma etching method to etch away the oxide layer on surface.
Wherein, in step (2), can use the method for brushing or spraying to form the FeCrAlY coating, annealing forms intermediate layer under protective atmosphere then.Described spraying method can be selected from methods such as flame-spraying, HVAF, electric arc spraying, detonation flame spraying, cold spraying; In the described FeCrAlY coating, the mass fraction of Fe is: 75-83.5wt%, the mass fraction of Cr is: 8-15wt%, the mass fraction of Al are the Y of 2.5-7.5wt% and surplus.Wherein said protective atmosphere annealing is meant vacuum annealing or inert atmosphere annealing or reducing atmosphere annealing, and described protective gas can be selected from by N
2, Ar, H
2Perhaps in the group that their combination in any is formed.The thickness in intermediate layer is 5um-100um, and preferably its thickness is 5um-20um.
Wherein, in step (3), the face coat of dura mater structure contains SiC, Si through spraying
3N
4Form with the powder of B, in the wherein said powder, contain SiC:35-48wt%, contain Si
3N
4: 18-36wt%, surplus is B.During spraying, its technological parameter is: operating voltage: 20-40V; Spray distance is: 100-200mm; Air pressure is 0.5-0.9MPa.The dura mater thickness of structure is 1mm-5mm, and preferably its thickness is 1mm-3mm.
Use the intermediate layer can prevent that basalis is in high temperature casting cycle generation high-temperature oxydation phenomenon; Also strengthened the adhesion strength between substrate and the coating in addition; And prevented that inner metal level is through diffusion; Metallic atom wherein diffuses in the dura mater structure coating on surface, the dura mater structure of infringement dura mater structure coating.
Through the ferrite stainless steel mold of method preparation of the present invention, have the FeCrAlY intermediate layer and contain SiC, Si
3N
4Coating with B dura mater structure; Because setting adjacent one another are and atomic structure are roughly close between substrate and the coating; Therefore; Adjacent coating can be because of problems such as atom defects; Produce internal stress and cause the problem of bad adhesion between the coating; Through coating structure design of the present invention, the intermediate layer can increase SiC and the Si that contains boron
3N
4Cohesive force between the ferrite stainless steel mold between coating and the substrate.And, in the dura mater structure of the present invention, except SiC and Si as the hard phase
3N
4Outside, also have the boron of specific quantity, can reduce the internal stress and the coefficient of friction thereof of face coat.Therefore, adopt the mould of the said structure of the application, can increase the service life and the serviceability thereof of mould.
The specific embodiment
Below will make further explanation to technical scheme of the present invention through specific embodiment.The applicant it is emphasized that following examples only are the needs for the content that describes invention in detail, and can not think limitation of the present invention.The present invention requires the scope protected, is as the criterion with the technical scheme that claims were limited.
Embodiment 1
Step 1
Provide a kind of ferritic stainless steel diel as substrate; What described ferritic stainless steel diel was used is a kind of ferritic stainless steel, and it is formed and content is: Cr:16wt%, Ti:0.15wt%, Si:0.5wt%, C:0.010wt%, Nb:0.5wt%, Cu:2.5wt%; The Fe of Al:1.5wt% and surplus and unavoidable impurities.At first use the greasy dirt of the means removal substrate surface of conventional alkali cleaning, use the method for plasma etching then, etch away the oxide of substrate surface, expose fresh base alloy layer.
Step 2
Brushing under vacuum atmosphere, forms the FeCrAlY coating in 600 degree annealing 1h then by the metal powder coating of Fe, Cr, Al, Y powder constituent; In the described FeCrAlY coating, the mass fraction of Fe is: 78.5wt%, the mass fraction of Cr is: 10wt%, the mass fraction of Al are the Y of 6.2wt% and surplus.The thickness in intermediate layer is 10um.
Step 3
The face coat of dura mater structure forms through the powder of spraying silicon carbide-containing, silicon nitride and boron, in the wherein said powder, contains SiC:35wt%, contains Si
3N
4: 36wt%, surplus is B.During spraying, its technological parameter is: operating voltage: 30V; Spray distance is: 150mm; Air pressure is 0.8MPa.The dura mater thickness of structure is 2mm.
Embodiment 2
Step 1
Provide a kind of ferritic stainless steel diel as substrate; What described ferritic stainless steel diel was used is a kind of ferritic stainless steel, and it is formed and content is: Cr:17wt%, Ti:0.10wt%, Si:0.80wt%, Nb:0.60wt%, Cu:2.0wt%; The Ni of Al:0.8wt% and surplus and unavoidable impurities.At first use the greasy dirt of the means removal substrate surface of conventional alkali cleaning, use the method for plasma etching then, etch away the oxide of substrate surface, expose fresh base alloy layer.
Step 2
Spraying forms sprayed coating by the metal dust of Fe, Cr, Al, Y powder constituent, under vacuum atmosphere, forms the FeCrAlY coating in 500 degree annealing 1h then; In the described FeCrAlY coating, the mass fraction of Fe is: 82.5wt%, the mass fraction of Cr is: 12wt%, the mass fraction of Al are the Y of 5.5wt% and surplus.The thickness in intermediate layer is 10um.
Step 3
The face coat of dura mater structure contains SiC, Si through spraying
3N
4And the formation of the powder of boron, in the wherein said powder, contain SiC:45wt%, contain Si
3N
4: 35wt%, surplus is B.During spraying, its technological parameter is: operating voltage: 30V; Spray distance is: 180mm; Air pressure is 0.7MPa.The dura mater thickness of structure is 3mm.
Embodiment 3
Step 1
Provide a kind of ferritic stainless steel diel as substrate; What described ferritic stainless steel diel was used is a kind of ferritic stainless steel, and it is formed and content is: Cr:18wt%, Ti:0.12wt%, Si:0.75wt% or C:0.005wt%, Nb:0.45wt%, Cu:1.5wt%; The Fe of Al:0.9wt% and surplus and unavoidable impurities.At first use the greasy dirt of the means removal substrate surface of conventional alkali cleaning, use the method for plasma etching then, etch away the oxide of substrate surface, expose fresh base alloy layer.
Step 2
Electric arc spraying under inert gas atmosphere, forms the FeCrAlY coating in 500 degree annealing 1h then by the metal powder coating of Fe, Cr, Al, Y powder constituent; In the described FeCrAlY coating, the mass fraction of Fe is: 83.5wt%, the mass fraction of Cr is: 12wt%, the mass fraction of Al are the Y of 3.2wt% and surplus.The thickness in intermediate layer is 20um.
Step 3
The face coat of dura mater structure contains SiC, Si through spraying
3N
4And the formation of the powder of boron, in the wherein said powder, contain SiC:48wt%, contain Si
3N
4: 32wt%, surplus is B.During spraying, its technological parameter is: operating voltage: 30V; Spray distance is: 180mm; Air pressure is 0.7MPa.The dura mater thickness of structure is 5mm.
Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art works as can make various corresponding changes and distortion by summary of the invention according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Embodiment 4
Step 1
Provide a kind of ferrite stainless steel mold as substrate; What described ferrite stainless steel mold was used is a kind of ferritic stainless steel alloy; It is formed and content is: the Ni of Cr:15wt%, Ti:6wt%, B:2wt%, Mo:12wt% and surplus and unavoidable impurities, wherein the total content of unavoidable impurities is lower than 0.15wt%.At first use the greasy dirt of the means removal substrate surface of conventional alkali cleaning, use the method for plasma etching then, etch away the oxide of substrate surface, expose fresh base alloy layer.
Step 2
Electric arc spraying under inert gas atmosphere, forms the FeCrAlY coating in 500 degree annealing 1h then by the metal powder coating of Fe, Cr, Al, Y powder constituent; In the described FeCrAlY coating, the mass fraction of Fe is: 83.5wt%, the mass fraction of Cr is: 12wt%, the mass fraction of Al are the Y of 3.2wt% and surplus.The thickness in intermediate layer is 20um.
Step 3
The face coat of dura mater structure contains SiC, Si through spraying
3N
4And the formation of the powder of boron, in the wherein said powder, contain SiC:43wt%, contain Si
3N
4: 36wt%, surplus is B.During spraying, its technological parameter is: operating voltage: 35V; Spray distance is: 175mm; Air pressure is 0.8MPa.The dura mater thickness of structure is 5mm.
Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art works as can make various corresponding changes and distortion by summary of the invention according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (10)
1. preparation method with ferrite stainless steel mold of dura mater structure, it may further comprise the steps:
(1) provides a kind of ferrite stainless steel mold as substrate, pre-treatment is carried out on the surface that substrate is pending;
(2) apply one deck intermediate layer, described intermediate layer is the FeCrAlY coating;
(3) apply the face coat with dura mater structure, the face coat of described dura mater structure comprises SiC, Si
3N
4And B.
2. the described preparation method of claim 1, it is characterized in that the mass fraction of Fe is in the described FeCrAlY coating: 75-83.5wt%, the mass fraction of Cr is: 8-15wt%, the mass fraction of Al are the Y of 2.5-7.5wt% and surplus.
3. claim 1 or 2 described preparation methods is characterized in that described pre-treatment step comprises the greasy dirt of removing substrate surface and the step of removing oxide layer.
4. claim 1 or 2 described preparation methods is characterized in that using the method for brushing or spraying to form the FeCrAlY coating, annealing under protective atmosphere then.
5. the described preparation method of claim 4 is characterized in that described spraying method is selected from any one in flame-spraying, HVAF, electric arc spraying, detonation flame spraying, the cold spraying.
6. the described preparation method of claim 4 is characterized in that described protective atmosphere refers to vacuum, inert gas or reducing atmosphere, and corresponding protection property gas is selected from by N
2, Ar, H
2Perhaps in the group that their combination in any is formed.
7. claim 1 or 2 described preparation methods is characterized in that the face coat of dura mater structure contains SiC, Si through spraying
3N
4Form with the powder of B.
8. the described preparation method of claim 7 is characterized in that described spraying is electric arc spraying.
9. the described preparation method of claim 7 is characterized in that containing SiC:35-48wt% in the wherein said powder, contains Si
3N
4: 18-36wt%, surplus is B.
10. the described preparation method of claim 8 is characterized in that the technological parameter of electric arc spraying is: operating voltage: 20-40V; Spray distance is: 100-200mm; Air pressure is 0.5-0.9MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110158309XA CN102343392A (en) | 2011-06-14 | 2011-06-14 | Preparation method of ferritic stainless steel die with hard film structure |
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|---|---|---|---|
| CN201110158309XA CN102343392A (en) | 2011-06-14 | 2011-06-14 | Preparation method of ferritic stainless steel die with hard film structure |
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| CN102343392A true CN102343392A (en) | 2012-02-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018110A (en) * | 2014-05-16 | 2014-09-03 | 北京理工大学 | Preparation method for ferrite electric-conduction ceramic coating |
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| JPS5931867A (en) * | 1982-08-17 | 1984-02-21 | Usui Internatl Ind Co Ltd | Formation of heat resistant and abrasion resistant coating layer on inside circumferential surface of metallic cylindrical body |
| CN1178204A (en) * | 1996-09-19 | 1998-04-08 | 株式会社东芝 | Thermal insulation coating components, their manufacture and gas turbine parts using them |
| CN1433486A (en) * | 2000-06-08 | 2003-07-30 | 表面工程设计产品公司 | Coating system for high temperature stainless steel |
| CN1653867A (en) * | 2002-05-08 | 2005-08-10 | 达纳公司 | Plasma-assisted coating |
| CN1692179A (en) * | 2002-10-09 | 2005-11-02 | 石川岛播磨重工业株式会社 | Rotor and coating method therefor |
| CN1776023A (en) * | 2005-11-23 | 2006-05-24 | 邹志尚 | Hard composite nano ceramic film cladding for use in carity of precision pressure mould |
| WO2008076953A2 (en) * | 2006-12-15 | 2008-06-26 | Praxair S.T. Technology, Inc. | Amorphous-nanocrystalline-microcrystalline coatings |
-
2011
- 2011-06-14 CN CN201110158309XA patent/CN102343392A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5931867A (en) * | 1982-08-17 | 1984-02-21 | Usui Internatl Ind Co Ltd | Formation of heat resistant and abrasion resistant coating layer on inside circumferential surface of metallic cylindrical body |
| CN1178204A (en) * | 1996-09-19 | 1998-04-08 | 株式会社东芝 | Thermal insulation coating components, their manufacture and gas turbine parts using them |
| CN1433486A (en) * | 2000-06-08 | 2003-07-30 | 表面工程设计产品公司 | Coating system for high temperature stainless steel |
| CN1653867A (en) * | 2002-05-08 | 2005-08-10 | 达纳公司 | Plasma-assisted coating |
| CN1692179A (en) * | 2002-10-09 | 2005-11-02 | 石川岛播磨重工业株式会社 | Rotor and coating method therefor |
| CN1776023A (en) * | 2005-11-23 | 2006-05-24 | 邹志尚 | Hard composite nano ceramic film cladding for use in carity of precision pressure mould |
| WO2008076953A2 (en) * | 2006-12-15 | 2008-06-26 | Praxair S.T. Technology, Inc. | Amorphous-nanocrystalline-microcrystalline coatings |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018110A (en) * | 2014-05-16 | 2014-09-03 | 北京理工大学 | Preparation method for ferrite electric-conduction ceramic coating |
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Application publication date: 20120208 |