CN108893707A - Aluminium die casting surface coated treatment technique and the cated aluminium die casting of tool - Google Patents
Aluminium die casting surface coated treatment technique and the cated aluminium die casting of tool Download PDFInfo
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- CN108893707A CN108893707A CN201810809910.2A CN201810809910A CN108893707A CN 108893707 A CN108893707 A CN 108893707A CN 201810809910 A CN201810809910 A CN 201810809910A CN 108893707 A CN108893707 A CN 108893707A
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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
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/36—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases using ionised gases, e.g. ionitriding
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
- C23C14/32—Vacuum evaporation by explosion; by evaporation and subsequent ionisation of the vapours, e.g. ion-plating
- C23C14/325—Electric arc evaporation
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of aluminium die casting surface coated treatment technique and the cated aluminium die castings of tool, include the following steps：Prerinse, dealuminzation, cleaning, degassing, sandblasting, rough polishing, plasma nitriding, finishing polish, cleaning and PVD coating.The present invention combines plasma nitriding and PVD coating, coating is set to have the characteristics that hardness is high, binding force is excellent, wearability is good, corrosion resistance and heat-resisting quantity are good, and the processing such as dealuminzation, degassing, sandblasting, polishing is carried out before PVD coating treatment, advanced optimize the binding force of coating, improve the service performance of die surface, the problems such as reducing viscous aluminium, fire check, corrosive wear, increases substantially the service life of aluminium die casting.
Description
Technical field：
The present invention relates to die surface technical field of modification more particularly to a kind of aluminium die casting surface coated treatment techniques
And the cated aluminium die casting of tool.
Background technique：
Aluminium die casting is a kind of part of compression casting, by the compression casting machinery die casting machine of casting die, liquid
Aluminum or aluminum alloy pours into the feeding inlet of die casting machine, through die casting machine die casting, casts out the aluminium part of the shape and size of mold limitation
Or aluminum alloy part, such part are usually just called aluminium die casting.Aluminium die casting belongs to hot-work die, and use condition is extremely
Badly.The fusing point of aluminium is 660 DEG C, when die casting, and temperature of aluminum liquid is controlled at 650-720 DEG C.It is pushed the case where not preheated to mold
Casting, mold cavity surface temperature rise to liquid temperature by room temperature, and mold cavity surface will bear great tensile stress.When being opened head part, mold cavity surface
Great compression is born again.Mold is after thousands of time die casting, the defects of surface just generates cracking, micro-crack, therefore right
Aluminium die casting surface property requires high.
Common aluminium die casting process for modifying surface has modifier treatment, glow discharge nitriding, steam oxidation, Bononizing pretreatment, heat
Spraying, PVD coating etc..Many researchers also have been devoted to improve the service life of aluminium die casting, Hyundai Motor Corporation
Patent of invention " coating material for aluminium die casting and the method for preparing the coating material " (201210592987.1)
Just describe a kind of method that die life is improved using PVD technique.The hair of Ningbo JiuTeng lamp light Electrical Appliances Co., Ltd
A kind of bright patent " aluminium die casting with plating composite surface coating " (201320825220.9) is described and is seeped using ion
Nitrogen adds the composite treatment process of non-magnetic controlled sputtering ion plating layer.Also having using the method for anodic oxidation improves aluminium die casting
Service life.
Summary of the invention：
The present invention is easy viscous aluminium for aluminium die casting, generates adhesive wear, high temperature erosion and abrasive wear, high temperature oxygen
Change and alloy deposition, fire check cause aluminium die casting service life low the features such as generation, in order to improve aluminium pressure
The service life of casting mould, the present invention in a kind of aluminium die casting surface coated treatment technique is provided, mold can be significantly improved
Service life.
The present invention is achieved through the following technical solutions：
A kind of aluminium die casting surface coated treatment technique, mainly includes the following steps that：
A. prerinse, using lye by spray, the greasy dirt of ultrasonic cleaning removal die surface；
The good mold of prerinse is placed in lye tank (vat) and carries out dealumination reaction by b. dealuminzation, removes die surface because of die trial
Or remaining molten aluminum ingredient after processing；
C. it cleans, is cleaned after the completion of dealumination reaction；
F. it deaerates, it is internal inevitably there are micro-crack or erosion stomata after aluminium die casting use, it needs true
The certain condition of setting removes the impurity such as remaining oil molecule, air in micro-crack or stomata in empty degasification furnace；
Mold after degassing is carried out dry blasting processing by e. sandblasting, removes oxide skin, the rust matter of die surface；
F. rough polishing carries out rough polishing after sandblasting, reduce mold surface roughness；
G. plasma nitriding carries out plasma nitriding to mold, and the main hardness for increasing die matrix applies for subsequent PVD
Layer provides hardness buffer layer, improves the anti-fatigue performance of mold；
H. finishing polish carries out finishing polish to mold after plasma nitriding, reduces die surface coefficient of friction, on the one hand improves
On the other hand film-substrate cohesion is conducive to compression mod production and is demoulded, not sizing；
I. it cleans, before carrying out PVD coating, needs to guarantee that die surface cleans；
J.PVD coating, the mold after cleaning carry out clamping into furnace, do PVD coating treatment, form one layer of height in die surface
The excellent PVD coating of hardness, antioxygenic property.
Preferably, lye used in the dealumination reaction in the step b is that certain density sodium aluminate-sodium hydroxide is molten
Liquid effectively can quickly remove aluminium die casting molten aluminum ingredient remained on surface, expose completely after on the one hand making mold dealuminzation
Matrix, it is on the other hand, repeatedly anti-under suitable cooling conditions convenient for checking whether mold has the problems such as crackle, damaged
Lye after answering can produce 3 crystal of Al (OH), can recycle.
Preferably, cleaning is to pass through spray using the Novatec cleaning equipment of import, leaching, surpass in step c, i
The processes such as sound, rinsing, drying make mold obtain clean surface.
Preferably, the degassing in the step d is carried out using vacuum degassing furnace, and the vacuum condition is less than for vacuum degree
1*10-4Mbar, 300-350 DEG C of true temp.
Preferably, in the step e sandblasting using dry blasting technique.The dry blasting technique is using 500
Purpose aluminum oxide sand, blasting pressure 3-4bar.
Preferably, the plasma nitriding technique in the step g, the plasma nitriding technique are low temperature nitriding, are seeped
Nitrogen temperature is 420-440 DEG C, and nitriding is with a thickness of 50-100 μm.
Preferably, finishing polish in the step h, the surface roughness after finishing polish reach Ra0.4.
Preferably, the PVD coating in the step j is prepared using arc ion plating (aip), and the PVD coating is AlCr
Base coating, coating layer thickness are 5-10 μm.
According to the above method, the cated aluminium die casting of tool that service life is longer, has excellent performance can be prepared by.
The beneficial effects of the invention are as follows：The present invention combines plasma nitriding and PVD coating, and coating is made to have hardness
High, the features such as binding force is excellent, wearability is good, corrosion resistance and heat-resisting quantity are good, and taken off before PVD coating treatment
The processing such as aluminium, degassing, sandblasting, polishing, advanced optimizes the binding force of coating, improves the service performance of die surface, reduces viscous
The problems such as aluminium, fire check, corrosive wear, increases substantially the service life of aluminium die casting.
Detailed description of the invention：
Fig. 1 is the flow chart of aluminium die casting surface coated treatment technique of the present invention；
Fig. 2 for of the invention three embodiments surveyed aluminium die casting and coating binding force metallographic microscope.
Specific embodiment：
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be understood by those skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Embodiment 1：
A kind of aluminium die casting surface coated treatment technique, as shown in Figure 1, including the following steps：
A. prerinse, using lye by spray, the greasy dirt of ultrasonic cleaning removal die surface；
The good mold of prerinse is placed in sodium aluminate-sodium hydroxide and carries out dealumination reaction by b. dealuminzation, removes mold table
The remaining molten aluminum in face；
C. it cleans, uses the Novatec cleaning equipment of import to be cleaned after the completion of dealumination reaction；
D. it deaerates, the impurity such as remaining oil molecule, air, vacuum in micro-crack or stomata is removed in vacuum degassing furnace
Degree is less than 0.8*10-4Mbar, 320 DEG C of true temp；
Mold after degassing is carried out dry blasting processing by the aluminum oxide sand of 500 mesh by e. sandblasting, and blasting pressure is
4bar removes oxide skin, the rust matter of die surface；
F. rough polishing carries out rough polishing after sandblasting, reduce mold surface roughness；
G. plasma nitriding carries out plasma nitriding to mold, and nitriding temperature is 430 DEG C, and nitriding increases with a thickness of 90 μm
The hardness of die matrix provides hardness buffer layer for subsequent PVD coating, improves the anti-fatigue performance of mold；
H. finishing polish, carries out finishing polish to mold after plasma nitriding, and the surface roughness after finishing polish reaches
Ra0.4 reduces die surface coefficient of friction；
I. it cleans, before carrying out PVD coating, secondary cleaning is carried out to die surface；
J.PVD coating, the mold after cleaning carry out clamping into furnace, PVD coating treatment are done using arc ion plating, in mold
Surface forms PVD coating, and coating layer thickness is 8 μm.
Aluminium die casting surface covering performance after the coating is detected, coating hardness 3350HV0.05, coating with
For basal body binding force as shown in Fig. 2 (a), binding force grade is HF1 grades, and coating surface coefficient of friction is Ra0.2.
Embodiment 2：
A kind of aluminium die casting surface coated treatment technique, as shown in Figure 1, including the following steps：
A. prerinse, using lye by spray, the greasy dirt of ultrasonic cleaning removal die surface；
The good mold of prerinse is placed in sodium aluminate-sodium hydroxide and carries out dealumination reaction by b. dealuminzation, removes mold table
The remaining molten aluminum in face；
C. it cleans, uses the Novatec cleaning equipment of import to be cleaned after the completion of dealumination reaction；
D. it deaerates, the impurity such as remaining oil molecule, air, vacuum in micro-crack or stomata is removed in vacuum degassing furnace
Degree is less than 0.6*10-4Mbar, 300 DEG C of true temp；
Mold after degassing is carried out dry blasting processing by the aluminum oxide sand of 500 mesh by e. sandblasting, and blasting pressure is
4bar removes oxide skin, the rust matter of die surface；
F. rough polishing carries out rough polishing after sandblasting, reduce mold surface roughness；
G. plasma nitriding carries out plasma nitriding to mold, and nitriding temperature is 420 DEG C, and nitriding increases with a thickness of 60 μm
The hardness of die matrix provides hardness buffer layer for subsequent PVD coating, improves the anti-fatigue performance of mold；
H. finishing polish, carries out finishing polish to mold after plasma nitriding, and the surface roughness after finishing polish reaches
Ra0.4 reduces die surface coefficient of friction；
I. it cleans, before carrying out PVD coating, secondary cleaning is carried out to die surface；
J.PVD coating, the mold after cleaning carry out clamping into furnace, PVD coating treatment are done using arc ion plating, in mold
Surface forms PVD coating, and coating layer thickness is 6 μm.
Aluminium die casting surface covering performance after the coating is detected, coating hardness 3300HV0.05, coating with
For basal body binding force as shown in Fig. 2 (b), binding force grade is HF1 grades, and coating surface coefficient of friction is Ra0.25.
Embodiment 3：
A kind of aluminium die casting surface coated treatment technique, as shown in Figure 1, including the following steps：
A. prerinse, using lye by spray, the greasy dirt of ultrasonic cleaning removal die surface；
The good mold of prerinse is placed in sodium aluminate-sodium hydroxide and carries out dealumination reaction by b. dealuminzation, removes mold table
The remaining molten aluminum in face；
C. it cleans, uses the Novatec cleaning equipment of import to be cleaned after the completion of dealumination reaction；
D. it deaerates, the impurity such as remaining oil molecule, air, vacuum in micro-crack or stomata is removed in vacuum degassing furnace
Degree is less than 1.0*10-4Mbar, 350 DEG C of true temp；
Mold after degassing is carried out dry blasting processing by the aluminum oxide sand of 500 mesh by e. sandblasting, and blasting pressure is
4bar removes oxide skin, the rust matter of die surface；
F. rough polishing carries out rough polishing after sandblasting, reduce mold surface roughness；
G. plasma nitriding carries out plasma nitriding to mold, and nitriding temperature is 440 DEG C, and nitriding increases with a thickness of 100 μm
Add the hardness of die matrix, provides hardness buffer layer for subsequent PVD coating, improve the anti-fatigue performance of mold；
H. finishing polish, carries out finishing polish to mold after plasma nitriding, and the surface roughness after finishing polish reaches
Ra0.4 reduces die surface coefficient of friction；
I. it cleans, before carrying out PVD coating, secondary cleaning is carried out to die surface；
J.PVD coating, the mold after cleaning carry out clamping into furnace, PVD coating treatment are done using arc ion plating, in mold
Surface forms PVD coating, and coating layer thickness is 10 μm.
Aluminium die casting surface covering performance after the coating is detected, coating hardness 3420HV0.05, coating with
For basal body binding force as shown in Fig. 2 (c), binding force grade is HF1 grades, and coating surface coefficient of friction is Ra0.2.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.
Claims (10)
1. a kind of aluminium die casting surface coated treatment technique, which is characterized in that include the following steps：
A. prerinse, using lye by spray, the greasy dirt of ultrasonic cleaning removal die surface；
The good mold of prerinse is placed in lye and carries out dealumination reaction by b. dealuminzation, removes the remaining molten aluminum of die surface；
C. it cleans, is cleaned after the completion of dealumination reaction；
D. it deaerates, remaining oil molecule, air plankton in micro-crack or stomata is removed in vacuum degassing furnace；
Mold after degassing is carried out blasting treatment by e. sandblasting, removes oxide skin, the rust matter of die surface；
F. rough polishing carries out rough polishing after sandblasting, reduce mold surface roughness；
G. plasma nitriding carries out plasma nitriding to mold, increases the hardness of die matrix, provide firmly for subsequent PVD coating
Buffer layer is spent, the anti-fatigue performance of mold is improved；
H. finishing polish carries out finishing polish to mold after plasma nitriding, reduces die surface coefficient of friction；
I. it cleans, before carrying out PVD coating, die surface is cleaned；
J.PVD coating, the mold after cleaning carry out clamping into furnace, do PVD coating treatment, form PVD coating in die surface.
2. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that in the step b
Lye used in dealumination reaction is sodium aluminate-sodium hydroxide solution.
3. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that in step c, i
Cleaning is to pass through spray, leaching, ultrasound, rinsing, drying process using cleaning equipment, and mold is made to obtain clean surface.
4. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that in the step d
Vacuum condition is that vacuum degree is less than 1*10-4Mbar, 300-350 DEG C of true temp.
5. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that sprayed in the step e
Sand is using dry blasting technique.
6. aluminium die casting surface coated treatment technique according to claim 5, which is characterized in that the dry blasting technique
Using the aluminum oxide sand of 500 mesh, blasting pressure 3-4bar.
7. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that the step g is medium
Glow discharge nitriding technique is low temperature nitriding, and nitriding temperature is 420-440 DEG C, and nitriding is with a thickness of 50-100 μm.
8. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that smart in the step h
Surface roughness after polishing reaches Ra0.4.
9. aluminium die casting surface coated treatment technique according to claim 1, which is characterized in that in the step j
PVD coating is prepared using arc ion plating (aip), and the PVD coating is AlCr base coating, and coating layer thickness is 5-10 μm.
10. a kind of cated aluminium die casting of tool, which is characterized in that the cated aluminium die casting of tool uses such as right
It is required that the described in any item surface coated treatment techniques of 1-9.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534785A (en) * | 2020-05-08 | 2020-08-14 | 徐州百惠模具制造有限公司 | Surface hardening treatment method for metal stamping die |
| CN112276800A (en) * | 2020-10-15 | 2021-01-29 | 上海交通大学 | Method and system for improving surface roughness of casting |
| CN113118962A (en) * | 2021-03-19 | 2021-07-16 | 廊坊市北方天宇机电技术有限公司 | Polishing and grinding treatment method for outer surface of casing |
| CN117418191A (en) * | 2023-12-15 | 2024-01-19 | 苏州瑞德智慧精密科技股份有限公司 | Surface PVD coating processing technology of aluminum die casting die |
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| CN108070817A (en) * | 2016-11-17 | 2018-05-25 | 广州今泰科技股份有限公司 | A kind of compound dual treatment method of metal die steel surface |
| CN108130507A (en) * | 2017-12-22 | 2018-06-08 | 西安交通大学 | A kind of surface recombination structure shock resistance coating die casting and preparation method thereof |
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2018
- 2018-07-23 CN CN201810809910.2A patent/CN108893707A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108070817A (en) * | 2016-11-17 | 2018-05-25 | 广州今泰科技股份有限公司 | A kind of compound dual treatment method of metal die steel surface |
| CN108130507A (en) * | 2017-12-22 | 2018-06-08 | 西安交通大学 | A kind of surface recombination structure shock resistance coating die casting and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111534785A (en) * | 2020-05-08 | 2020-08-14 | 徐州百惠模具制造有限公司 | Surface hardening treatment method for metal stamping die |
| CN112276800A (en) * | 2020-10-15 | 2021-01-29 | 上海交通大学 | Method and system for improving surface roughness of casting |
| CN113118962A (en) * | 2021-03-19 | 2021-07-16 | 廊坊市北方天宇机电技术有限公司 | Polishing and grinding treatment method for outer surface of casing |
| CN113118962B (en) * | 2021-03-19 | 2023-11-21 | 廊坊市北方天宇机电技术有限公司 | Polishing and grinding treatment method for outer surface of casing |
| CN117418191A (en) * | 2023-12-15 | 2024-01-19 | 苏州瑞德智慧精密科技股份有限公司 | Surface PVD coating processing technology of aluminum die casting die |
| CN117418191B (en) * | 2023-12-15 | 2024-04-16 | 苏州瑞德智慧精密科技股份有限公司 | Surface PVD coating processing technology of aluminum die casting die |
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