CN102808178A - Zinc alloy mold with high temperature-resistant and wear-resistant coating - Google Patents
Zinc alloy mold with high temperature-resistant and wear-resistant coating Download PDFInfo
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- CN102808178A CN102808178A CN2011101426351A CN201110142635A CN102808178A CN 102808178 A CN102808178 A CN 102808178A CN 2011101426351 A CN2011101426351 A CN 2011101426351A CN 201110142635 A CN201110142635 A CN 201110142635A CN 102808178 A CN102808178 A CN 102808178A
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Abstract
The present invention provides a preparation method for a zinc alloy mold with a high temperature-resistant and wear-resistant coating. The method comprises the following steps: providing a zinc alloy mold as a substrate, and carrying out a pretreatment on a substrate surface requiring treatment; applying a middle transition layer, wherein the middle transition layer is a ZnCrAlY coating; and applying a high temperature-resistant coating, wherein the high temperature-resistant coating contains SiC, TiC, Fe and Ni. With application of the mold with the structure in the present invention, a service life and use performances of the mold 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 mould of heat resistant and wear resistant.
Background technology
Mould is widely used in impact briquetting 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 shocking of rapid heating refrigerative, 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 oxidation phenomenon can not take place in mould under hot conditions.
(5) good processability, the surface that is prone to be processed into high precision 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 moulding stock mostly; But high temperature oxidation takes place in this mould easily; Under thermal cycling effect repeatedly; The inside crystal phase structure of material changes, and also variation of surface quality, thereby causes mould to lose efficacy easily.
Traditional moulds is zinc, aluminium, copper, magnesium with mfg. moulding die with the zinc alloy material staple; Zn-Al-Cu-Mg is that alloy is that performance preferably uses maximum mfg. moulding dies to use zinc alloy with actual in the prior art, in the Zn-Al-Cu-Mg alloy, can improve its performance through adding some trace element.Still there is following problem as existing zinc alloy mould:
1, mechanical property does not reach mould yet and makes requirement, and the strength ratio punching block is much lower, and hardness of alloy is relatively poor with wear resistance, easy damage under bigger blanking pressure or die cavity injection pressure and clamp force effect; Hardness of alloy and wear resistance are relatively poor, and the work-ing life of mould is short, can only reach thousands of production quantity;
2, the zinc alloy softening temperature is low, and size is unstable.The zinc alloy fusing point is low, and when working more than 200 ℃, intensity, hardness reduce, and under big blanking pressure or high injection pressure effect, mold cavity is easy to generate thermal distortion, influence the precision of product, and the abrasion loss increasing.
In order to address the above problem, the application's applicant at the zinc alloy mould surface spraying metal oxide ceramic particle and the superhard alloy of hard, thereby on zinc alloy surface, form composite structure mould wear-resisting, the high-temperature corrosion resistance coating on its surface.
The object of the present invention is to provide a kind of preparation method with zinc alloy mould of high-temperaure coating; This method can be used for improving the Wear-resistant, high-temperature resistant performance of zinc alloy mould; Brought up to thousands of time from about 1,000 times the work-ing life of zinc alloy mould; Even can reach more than ten thousand times, significant prolongation the work-ing life of zinc alloy mould.
The present invention has adopted following technical scheme for this reason: a kind of zinc alloy mould with high-temperaure coating, and it has with understructure:
(1) a kind of zinc alloy press tool is as substrate;
(2) put on suprabasil intermediate layer, described middle layer is the ZnCrAlY coating;
(3) put on high-temperaure coating on the middle layer, described high-temperaure coating comprises SiC, TiC, Fe and Ni.
Wherein, the composition of described zinc alloy and composition are: Al:5wt%-22wt%, Cu:2wt%-10wt%, manganese 2wt%-5wt%, surplus is Zn.
In the described ZnCrAlY coating, the massfraction of Zn is: 35-45.5wt%, the massfraction of Cr is: 36-48wt%, the massfraction of Al are the Y of 2.5-8.5wt% and surplus.
Wherein, in the high-temperaure coating, contain SiC:25-36wt%, contain TiC:18-32wt%, contain Fe:8-18wt%, surplus is Ni.
Wherein, the thickness of intermediate layer is 10um-50um, and preferably its thickness is 10um-20um.
Wherein, the thickness of high-temperaure coating is 3mm-8mm, and preferably its thickness is 3mm-5mm.
The method of spraying forms the ZnCrAlY coating, and annealing forms intermediate layer under protective atmosphere then.Described 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
2In the group that perhaps their arbitrary combination is formed.
Wherein, the top coat of high-temperaure coating forms through the powder that spraying contains SiC, TiC, Fe and Ni, in the wherein said powder, contains SiC:25-36wt%, contains TiC:18-32wt%, contains Fe:8-18wt%, and surplus is Ni.During spraying, its processing parameter is: WV: 20-35V; Spray distance is: 120-180mm; Air pressure is 0.4-0.8MPa.The thickness of high-temperaure coating is 3mm-8mm, and preferably its thickness is 3mm-5mm.
Use the middle layer can prevent that stratum basale is in high temperature casting cycle generation high temperature oxidation phenomenon; Also strengthened the cohesive strength between substrate and the coating in addition; And prevented inner metal level through diffusion, atoms metal wherein diffuses in the high-temperaure coating on surface.
Zinc alloy mould through method preparation of the present invention; Have ZnCrAlY middle layer and the coating that contains SiC, TiC, Fe and Ni high-temperaure coating; 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, produces internal stress and causes the problem of bad adhesion between the coating; Through coating structure design of the present invention, the middle layer can increase the cohesive force between the zinc alloy mould between SiC, TiC, Fe high-temperaure coating and the substrate that contains Ni.And, in the high-temperaure coating of the present invention, also have the iron and the nickel of some amount, can improve the internal stress of top coat.Therefore, adopt the mould of the said structure of the application, can increase the work-ing life and the use properties thereof of mould.
Embodiment
Below will make further explanation to technical scheme of the present invention through typical embodiment.The applicant it is emphasized that following examples only are the needs for the content that specifies invention, 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
Mould 1:
The first layer: zinc alloy press tool substrate, the composition of wherein said zinc alloy and composition are: Al:8wt%, Cu:3wt%, Mn:2.5wt%, surplus is Zn.
The second layer: the ZnCrAlY intermediate layer, the massfraction of Zn is: 38wt%, the massfraction of Cr is: 38wt%, the massfraction of Al are the Y of 3.5wt% and surplus.The thickness of ZnCrAlY intermediate layer is 10um.
The 3rd layer: high-temperaure coating, wherein contain SiC:25wt%, contain TiC:18wt%, the Ni of Fe:18wt% and surplus.The thickness of high-temperaure coating is 7.5mm.
Embodiment 2
Mould 2:
The first layer: zinc alloy press tool substrate, the composition of wherein said zinc alloy and composition are: Al:8wt%, Cu:2wt%, Mn:2.5wt%, surplus is Zn.
The second layer: the ZnCrAlY intermediate layer, the massfraction of Zn is: 35wt%, the massfraction of Cr is: 38wt%, the massfraction of Al are the Y of 3.5wt% and surplus.The thickness of ZnCrAlY intermediate layer is 10um.
The 3rd layer: high-temperaure coating, wherein contain SiC:25wt%, contain TiC:18wt%, the Ni of Fe:18wt% and surplus.The thickness of high-temperaure coating is 4.5mm.
Embodiment 3
Mould 3:
The first layer: zinc alloy press tool substrate, the composition of wherein said zinc alloy and composition are: Al:10wt%, Cu:3.5wt%, Mn:2.8wt%, surplus is Zn.
The second layer: the ZnCrAlY intermediate layer, the massfraction of Zn is: 35wt%, the massfraction of Cr is: 45wt%, the massfraction of Al are the Y of 6.5wt% and surplus.The thickness of ZnCrAlY intermediate layer is 10um.
The 3rd layer: high-temperaure coating, wherein contain SiC:28wt%, contain TiC:22wt%, the Ni of Fe:15wt% and surplus.The thickness of high-temperaure coating is 6.0mm.
Embodiment 4
Mould 4:
The first layer: zinc alloy press tool substrate, the composition of wherein said zinc alloy and composition are: Al:12.5wt%, Cu:3.2wt%, Mn:2.9wt%, surplus is Zn.
The second layer: the ZnCrAlY intermediate layer, the massfraction of Zn is: 39wt%, the massfraction of Cr is: 46wt%, the massfraction of Al are the Y of 6.5wt% and surplus.The thickness of ZnCrAlY intermediate layer is 10um.
The 3rd layer: high-temperaure coating, wherein contain SiC:28wt%, contain TiC:22wt%, the Ni of Fe:15wt% and surplus.The thickness of high-temperaure coating is 4.0mm.
Embodiment 5
Mould 5:
The first layer: zinc alloy press tool substrate, the composition of wherein said zinc alloy and composition are: Al:14wt%, Cu:3.5wt%, Mn:2.5wt%, surplus is Zn.
The second layer: the ZnCrAlY intermediate layer, the massfraction of Zn is: 43wt%, the massfraction of Cr is: 45wt%, the massfraction of Al are the Y of 4.5wt% and surplus.The thickness of ZnCrAlY intermediate layer is 10um.
The 3rd layer: high-temperaure coating, wherein contain SiC:36wt%, contain TiC:28wt%, the Ni of Fe:12wt% and surplus.The thickness of high-temperaure coating is 3.5mm.
Embodiment 6
Mould 6:
The first layer: zinc alloy press tool substrate, the composition of wherein said zinc alloy and composition are: Al:16wt%, Cu:6.5wt%, Mn:3.5wt%, surplus is Zn.
The second layer: the ZnCrAlY intermediate layer, the massfraction of Zn is: 42wt%, the massfraction of Cr is: 39wt%, the massfraction of Al are the Y of 7.5wt% and surplus.The thickness of ZnCrAlY intermediate layer is 10um.
The 3rd layer: high-temperaure coating, wherein contain SiC:36wt%, contain TiC:28wt%, the Ni of Fe:12wt% and surplus.The thickness of high-temperaure coating is 5.5mm.
Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art is when making various corresponding different dies by summary of the invention according to the present invention; For example through changing known coating method and/or adjust the component and the content of each coating and matrix, but these change and are out of shape the protection domain that resulting mould all should belong to the appended claim of the present invention accordingly.
Claims (8)
1. zinc alloy mould with high-temperaure coating, it has with understructure:
(1) a kind of zinc alloy mould is as substrate;
(2) put on suprabasil intermediate layer, described intermediate layer is the ZnCrAlY coating;
(3) put on high-temperaure coating on the intermediate layer, described high-temperaure coating comprises SiC, TiC, Fe and Ni.
2. the described zinc alloy mould of claim 1, it is characterized in that the massfraction of Zn is in the described ZnCrAlY coating: 35-45.5wt%, the massfraction of Cr is: 36-48wt%, the massfraction of Al are the Y of 2.5-8.5wt% and surplus.
3. the described zinc alloy mould of claim 1 is characterized in that containing SiC:25-36wt% in the wherein said powder, contains TiC:18-32wt%, contains Fe:8-18wt%, and surplus is Ni.
4. the described zinc alloy mould of claim 1, the thickness that it is characterized in that described intermediate layer is 10um-50um.
5. the described zinc alloy mould of claim 5, the thickness that it is characterized in that described intermediate layer is 10um-20um.
6. the described zinc alloy mould of claim 1, the thickness that it is characterized in that described high-temperaure coating is 3mm-8mm.
7. the described zinc alloy mould of claim 6, the thickness that it is characterized in that described high-temperaure coating is 3mm-5mm.
8. the described zinc alloy mould of claim 1, it is characterized in that the composition of described zinc alloy and composition are: Al:5wt%-22wt%, Cu:2wt%-10wt%, manganese 2wt%-5wt%, surplus is Zn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101426351A CN102808178A (en) | 2011-05-30 | 2011-05-30 | Zinc alloy mold with high temperature-resistant and wear-resistant coating |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101426351A CN102808178A (en) | 2011-05-30 | 2011-05-30 | Zinc alloy mold with high temperature-resistant and wear-resistant coating |
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| CN102808178A true CN102808178A (en) | 2012-12-05 |
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| CN2011101426351A Pending CN102808178A (en) | 2011-05-30 | 2011-05-30 | Zinc alloy mold with high temperature-resistant and wear-resistant coating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451527A (en) * | 2013-09-25 | 2013-12-18 | 常熟市金马模具有限公司 | High-temperature-resistant die |
| CN107974641A (en) * | 2017-11-28 | 2018-05-01 | 宁波市鸿博机械制造有限公司 | A kind of EPS output shafts |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0318803A1 (en) * | 1987-11-28 | 1989-06-07 | Asea Brown Boveri Aktiengesellschaft | High-temperature protective coating |
| CN1465745A (en) * | 2002-06-14 | 2004-01-07 | 中国科学院金属研究所 | Method of risisting high-temp. oxidation and heat corrosion for high-temp. alloy |
| CN1718812A (en) * | 2005-07-04 | 2006-01-11 | 帅进 | High wear resistance, high toughness titanium carbide base hard alloy capable of welding |
| US20100221574A1 (en) * | 2009-02-27 | 2010-09-02 | Rochester Thomas H | Zinc alloy mechanically deposited coatings and methods of making the same |
| CN101967595A (en) * | 2010-11-24 | 2011-02-09 | 沈阳工业大学 | Spray-deposition nano particle reinforced zinc-based composite and preparation method thereof |
-
2011
- 2011-05-30 CN CN2011101426351A patent/CN102808178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0318803A1 (en) * | 1987-11-28 | 1989-06-07 | Asea Brown Boveri Aktiengesellschaft | High-temperature protective coating |
| CN1465745A (en) * | 2002-06-14 | 2004-01-07 | 中国科学院金属研究所 | Method of risisting high-temp. oxidation and heat corrosion for high-temp. alloy |
| CN1718812A (en) * | 2005-07-04 | 2006-01-11 | 帅进 | High wear resistance, high toughness titanium carbide base hard alloy capable of welding |
| US20100221574A1 (en) * | 2009-02-27 | 2010-09-02 | Rochester Thomas H | Zinc alloy mechanically deposited coatings and methods of making the same |
| CN101967595A (en) * | 2010-11-24 | 2011-02-09 | 沈阳工业大学 | Spray-deposition nano particle reinforced zinc-based composite and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103451527A (en) * | 2013-09-25 | 2013-12-18 | 常熟市金马模具有限公司 | High-temperature-resistant die |
| CN107974641A (en) * | 2017-11-28 | 2018-05-01 | 宁波市鸿博机械制造有限公司 | A kind of EPS output shafts |
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Application publication date: 20121205 |