CN110172671A - A kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation method - Google Patents
A kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation method Download PDFInfo
- Publication number
- CN110172671A CN110172671A CN201910528525.5A CN201910528525A CN110172671A CN 110172671 A CN110172671 A CN 110172671A CN 201910528525 A CN201910528525 A CN 201910528525A CN 110172671 A CN110172671 A CN 110172671A
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- CN
- China
- Prior art keywords
- aluminum
- aluminum alloy
- casting mould
- film
- alloy casting
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Classifications
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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
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
- C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
-
- 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
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
- C23C14/352—Sputtering by application of a magnetic field, e.g. magnetron sputtering using more than one target
Abstract
The invention discloses a kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation methods, the polishing of aluminum or aluminum alloy casting mould substrate, magnetic control sputtering plating nimonic film after polishing and cleaning, drying, nimonic film is stable and is tightly combined with matrix, with good thermal conductivity, improve the quenching property of substrate, the heat of the aluminum or aluminum alloy melted in aluminum or aluminum alloy forming process is easier to outwardly scatter and disappear by mold, simultaneously, with good ductility and corrosion resistance, with excellent plasticity, the surface lubrication state of mold can be improved, it is stress-retained when to aluminium and the aluminium alloy machine-shaping of melting to improve mold, reduce mold stress, it avoids quickly heating when aluminium and the aluminium alloy machine-shaping of melting, the problem of causing crack of die and product to crack when rapid cooling, reduce crack of die probability, improve mould It is used with effect.
Description
Technical field
The present invention relates to aluminum or aluminum alloy processing technique field more particularly to a kind of aluminum or aluminum alloy casting mould cracking resistances
Protective film and preparation method.
Background technique
Aluminum or aluminum alloy die casting is that the aluminum or aluminum alloy high speed of melting is pressed into an accurate metal die type using high pressure
Intracavitary, aluminum or aluminum alloy liquid solidifies a kind of casting for forming casting under the effect of the pressure.Die casting is raw as die casting
The critical equipment of production, its performance and service life directly affect the quality and cost of aluminium alloy castings.But the work of die casting
Make condition very severe, there is corrosion caused by directly contacting with melting aluminum or aluminum alloy and mold work to be repeatedly subjected to heat in the process
Heat fatigue caused by the cooling alternating action of state METAL HEATING PROCESS and cooling medium and the crackle generated.These corrosion and crackle are pressures
The most common failure mode of casting mould.Usually can by adjusting the alloying component of mold materials come improve mold performance and make
With the service life, for example common aluminum or aluminum alloy processing mold uses H13 steel in industry, H13 steel have high impact resistance and
High-hardenability, Si, Mn, Cr, Mo, W are contained in composition, and V etc. has anti-impact necessary to low temperature when cooling medium is cooled down
Ability is hit, general deformation is smaller, but if heated unevenly in forging process, forge crack, different heat treatment easily occurs
Technique is easy to make mold generation deformation that can generate larger internal stress if cooling after forged speed control is improper, lead to crack of die.
In addition to this, in industry usually can also using nitrogen treatment or surface covering method to aluminum alloy die-casting die into
Row surface treatment appropriate, improves the corrosion-resistant and heat-resistant anti-fatigue performance of mold, so as to improve the quality of mold, extend mould
The service life of tool.Wherein, nitrogen treatment also improves the corrosion resistance of mold working surface and heat-resisting tired to a certain extent
Labor performance, but it still needs further improvement for the service life of mold, and then further decreases the production cost of die casting.Coating technology
Important means as material surface technology, it is intended to the working performance that workpiece surface is improved with minimal amount of material, to reach
It improves product quality, the service life for extending workpiece, reduce production cost, the purpose to economize on resources with the energy.However, existing
Coating majority is organic matter film, and since processing carries out at high temperature, organic component is decomposed in coating, may be sent out with aluminium and aluminium alloy
Biochemical reaction influences product quality, and processes inconvenience, and coating itself is also easy to fall off under stress.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation side
Method, with it is long-acting solve the problems, such as that mold is easy to crack while, enhance the anticorrosive property of mold body.
The present invention provides a kind of aluminum or aluminum alloy casting mould cracking resistance protective film, key is the cracking resistance protection
Film is NiTi evanohm film.
Preferably, the Ni containing 20~40wt%, the Cr of 40~50wt% and 20 in the NiTi evanohm film~
The Ti of 30wt%.
Preferably, the cracking resistance protective film with a thickness of 0.1~0.8 μm.
The present invention also provides a kind of preparation method of aluminum or aluminum alloy casting mould cracking resistance protective film, feature exists
In including the following steps:
S1. it is dried after aluminum or aluminum alloy casting mould substrate being polished, polished and cleaned；
S2. using magnetic control sputtering plating method by step S1 treated the aluminum or aluminum alloy casting mould substrate surface
Form nimonic film.
Preferably, cleaning includes alkali cleaning in the step S1.
Preferably, the step S2 specially successively opens pure Ni metal targets, pure Cr metal targets and pure Ti metallic target
Material, to form nimonic film in the aluminum or aluminum alloy casting mould substrate surface.
Preferably, magnetic control sputtering plating method described in the step S2 is high vacuum direct magnetic control sputter.
Preferably, in the step S2 magnetic control sputtering plating condition are as follows: the aluminum or aluminum alloy casting mould base reservoir temperature is
100~150 DEG C, gas flow is 40~80cc/min, and DC current is 20~30A, DC voltage≤800v；Vacuum degree is
10-4~10-5Pa, working gas are 99.999% argon gas, and film coating environment humidity is≤50%.
Preferably, the pure Ni metal targets plated film opening time be 15~40s, the pure Cr metal targets opening time be 40~
60s, pure Ti metal targets opening time are 15~20s.
Compared with prior art, the present invention provides providing a kind of aluminum or aluminum alloy casting mould cracking resistance protective film,
The cracking resistance protective film is NiTi evanohm film, compared with prior art, the invention has the following advantages: (1) nickel chromium triangle titanium
Alloy film is stablized, and magnetic control sputtering plating method can be such that nimonic film is tightly combined with matrix, and (2) nimonic film has good
Thermal conductivity, the heat of the aluminum or aluminum alloy melted in aluminum or aluminum alloy forming process is easier to outwardly scatter and disappear by mold；(3)
Nimonic film has good ductility and corrosion resistance, has excellent plasticity, the surface lubrication shape of mold can be improved
State, it is stress-retained when to aluminium and the aluminium alloy machine-shaping of melting to improve mold, reduces mold stress.To sum up, this hair
The bright stability for solving sputter alloy, improves the ductility of mold, improves the quenching property of substrate, avoids the aluminium and aluminium of melting
The problem of causing crack of die and product to crack when quickly heating, being quickly cooled down when alloy machine-shaping, reaches reduction
Crack of die probability, the purpose for improving mold Acceptable life reduce entreprise cost.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, With reference to embodiment to this
Invention elaborates.
The present invention provides a kind of aluminum or aluminum alloy casting mould cracking resistance protective film, key is the cracking resistance protective film
For nimonic film, the content of Ni is preferably 20~40wt% in nimonic film, and the content of Cr is preferably 40~
The content of 50wt%, Ti are preferably 20~30wt%.The thickness of nimonic film is preferably 0.1~0.8 μm.Wherein, Ni has
There are good ductility and plasticity, good corrosion resistance；Cr has good ductility and corrosion resistance；Ti has good prolong
Malleability and plasticity, good corrosion resistance.Fusing point of three's fusing point than aluminum or aluminum alloy and mold is much higher, and all has
Good thermal conductivity, is influenced minimum by temperature change, improves the toughness and heat-resistant deforming performance of mould steel.Moreover, NiTi closes
Fitting has memory function, and anti-fatigue performance is strong.Alloy film after three is compound has excellent a thermal conductivity and ductility, plasticity,
Corrosion resistance.
The present invention also provides a kind of preparation method of aluminum or aluminum alloy casting mould cracking resistance protective film, feature exists
In including the following steps:
S1. it is dried after aluminum or aluminum alloy casting mould substrate being polished, polished and cleaned；
First aluminum or aluminum alloy casting mould substrate is cleaned to clean oil-free rear drying first, is then polished with abrasive paper for metallograph
To bright smooth and without obvious scratch, then polish.Cleaned up after polishing, cleaning process can take washing, alkali cleaning, washing,
The sequence of pickling, washing, to ensure that alloy film layer and die surface have good binding force after plated film.Alkali cleaning is to remove
The oxide on aluminum or aluminum alloy casting mould surface.
S2. using magnetic control sputtering plating method by step S1 treated the aluminum or aluminum alloy casting mould substrate surface
Form nimonic film.
When aluminum or aluminum alloy casting mould base reservoir temperature is 100~150 DEG C by pure Ni metal targets, pure Cr metal targets
It is opened with pure Ti metal targets and carries out magnetic control sputtering plating, the condition of magnetic control sputtering plating is preferred are as follows: gas flow is 40~80cc/min, directly
Galvanic electricity stream is 20~30A, DC voltage≤800v, vacuum degree 10-4~10-5Pa, working gas are 99.999% argon gas, plating
Membrane environment humidity is≤50%.In order to reach better effect, selection successively open pure Ni metal targets, pure Cr metal targets and
Pure Ti metal targets while to ensure that alloy film can better solve crack of die problem, can enhance its mold body
Antiseptic property.Using in magnetic control sputtering plating method coating process, the pure Ni metal targets opening time is preferably 15~40s, pure
The Cr metal targets opening time is preferably 40~60s, and the pure Ti metal targets opening time is preferably 15~20s.Each target is opened
Time depends on the requirement in practical application to the thickness of film.
For the sake of becoming apparent from, it is described in detail below by following embodiment.
Embodiment 1
(1) the aluminum or aluminum alloy casting mould substrate that material is H13 is successively washed, is alkali cleaning, washing, pickling, pure
Washing, is then dried.
(2) it is polished with abrasive paper for metallograph, until it is bright smooth, without obvious scratch, polishing.
(3) mold base after polishing is successively washed again, alkali cleaning, washing, pickling, pure water are washed, and are then dried, complete
At surface preparation.
(4) high vacuum direct magnetic control is carried out on the aluminum or aluminum alloy casting mould substrate surface Jing Guo surface preparation to splash
Plating, detailed process are
Setting magnetic control sputtering plating condition: 100 DEG C of base reservoir temperature, gas flow 40cc/min, plated film DC current 25A, direct current
Voltage≤800v；Vacuum degree is 10-5Pa, working gas are 99.999% argon gas, and film coating environment humidity is≤50%；
It opens pure Ni metal targets and carries out plated film, opening time 15s；
It opens pure Cr metal targets and carries out plated film, opening time 60s；
It opens pure Ti metal targets and carries out plated film, opening time 15s.
0.4 μm of the nimonic film thicknesses of layers that the preparation method obtains, Ni accounts for 25%, Cr and accounts for 50% in alloy film,
Ti accounts for 25%.
Embodiment 2
Base reservoir temperature is 120 DEG C, gas flow 80cc/min in magnetic control sputtering plating condition, and plated film DC current is 20A；Very
Reciprocal of duty cycle is 5*10-5Pa, pure Ni metal targets plated film time are 20s, and pure Cr metal targets plated film time is 40s, pure Ti metallic target
Material plated film time is 20s, the other the same as in Example 1.0.6 μm of obtained thicknesses of layers, Ni accounts for 35%, Cr and accounts for 40% in alloy film,
Ti accounts for 25%.
Embodiment 3
Coating temperature is 150 DEG C, gas flow 60cc/min in magnetic control sputtering plating condition, and plated film DC current is 30A；Very
Reciprocal of duty cycle is 10-4Pa, pure Ni metal targets plated film time are 40s, and pure Cr metal targets plated film time is 50s, pure Ti metal targets
Plated film time is 20s, the other the same as in Example 1.0.7 μm of obtained thicknesses of layers, Ni accounts for 35%, Cr and accounts for 45%, Ti in alloy film
Account for 20%.
It is above only to illustrate section Example, it can be seen that coating temperature, argon flow, plating membrance current, vacuum degree, Ni
Metal targets, pure Cr metal targets, the plated film time of pure Ti metal targets are key parameter.It should be pointed out that being led for this technology
For the those of ordinary skill of domain, without departing from the principle of the present invention, by technique more than optimization, obtained performance is good
Good composite alloy coating process condition is accordingly to be regarded as protection scope of the present invention.
Claims (9)
1. a kind of aluminum or aluminum alloy casting mould cracking resistance protective film, which is characterized in that the cracking resistance protective film is nickel chromium triangle titanium
Alloy film.
2. aluminum or aluminum alloy casting mould cracking resistance protective film according to claim 1, which is characterized in that the cracking resistance
The Ti of the Cr and 20~30wt% of Ni, 40~50wt% in protective film containing 20~40wt%.
3. aluminum or aluminum alloy casting mould cracking resistance protective film according to claim 1, which is characterized in that the cracking resistance
Protective film with a thickness of 0.1~0.8 μm.
4. a kind of preparation method of the described in any item aluminum or aluminum alloy casting mould cracking resistance protective films of claims 1 to 3,
It is characterized in that, includes the following steps:
S1. aluminum or aluminum alloy casting mould substrate is polished, polished and is cleaned, then dried；
S2. using magnetic control sputtering plating method by step S1, treated that the aluminum or aluminum alloy casting mould substrate surface is formed
NiTi evanohm film.
5. the preparation method according to claim 4, which is characterized in that cleaning includes alkali cleaning in the step S1.
6. the preparation method according to claim 4, which is characterized in that the step S2 specially successively opens pure Ni metal
Target, pure Cr metal targets and pure Ti metal targets, to form NiTi chromium in the aluminum or aluminum alloy casting mould substrate surface
Alloy film.
7. the preparation method according to claim 4, which is characterized in that magnetic control sputtering plating method described in step S2 is high vacuum
Direct magnetic control sputter.
8. the preparation method according to claim 4, which is characterized in that the condition of magnetic control sputtering plating in the step S2 are as follows: institute
Stating aluminum or aluminum alloy casting mould base reservoir temperature is 100~150 DEG C, and gas flow is 40~80cc/min, DC current 20
~30A, DC voltage≤800v；Vacuum degree is 10-4~10-5Pa, the argon gas that working gas is 99.999%, film coating environment are wet
Degree is≤50%.
9. preparation method according to claim 6, which is characterized in that the pure Ni metal targets opening time be 15~
40s, the pure Cr metal targets opening time are 40~60s, and the pure Ti metal targets opening time is 15~20s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910528525.5A CN110172671A (en) | 2019-06-18 | 2019-06-18 | A kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910528525.5A CN110172671A (en) | 2019-06-18 | 2019-06-18 | A kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation method |
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2019
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Application publication date: 20190827 |