CN107475585A - A kind of high intensity hard disk aluminium alloy and preparation method thereof - Google Patents
A kind of high intensity hard disk aluminium alloy and preparation method thereof Download PDFInfo
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- CN107475585A CN107475585A CN201710918988.3A CN201710918988A CN107475585A CN 107475585 A CN107475585 A CN 107475585A CN 201710918988 A CN201710918988 A CN 201710918988A CN 107475585 A CN107475585 A CN 107475585A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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Abstract
A kind of high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：Si：0.65 0.7%；Fe：0.25 0.3%；Cu：0.3 0.35%；Mn：0.1 0.15%；Mg：0.86 0.90%；Zn≤0.05%；Ti：0.04 0.06%；Surplus is Al.Preferably, the high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：Si：0.68%；Fe：0.27%；Cu：0.32%；Mn：0.14%；Mg：0.88%；Zn：0.01%；Ti：0.05%；Surplus is Al.The hard disk that the present invention is prepared aluminium alloy good impact resistance, smooth surface, machinability is good, and hardness is high, long lifespan.
Description
Technical field
The present invention relates to field of computer technology, is used for computer hard disc high-strength aluminum alloy and its system more particularly, to one kind
Preparation Method.
Background technology
Hard disk is one of main storaging medium of computer, it is desirable to light weight and has high rigidity, and has smooth surface, at present
Typically use JIS H 4000：5086 alloys (Al-Mg systems alloy) of 2014 defineds, but R/W speed of hard disc is got over
Carry out higher, the thickness of hard disk also more and more thinner, the hardness of the aluminium alloy, flatness, impact resistance etc. can not meet increasingly to improve
Hard disk aluminium alloy quality requirement.
The content of the invention
In view of the above-mentioned problems existing in the prior art, this application provides a kind of high intensity hard disk aluminium alloy and its preparation side
Method.The hard disk that the present invention is prepared aluminium alloy good impact resistance, smooth surface, machinability is good, and hardness is high, long lifespan.
Technical scheme is as follows：
A kind of high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：
Si：0.65-0.7%；Fe：0.25-0.3%；Cu：0.3-0.35%；Mn：0.1-0.15%；Mg：0.86-
0.90%；Zn≤0.05%；Ti：0.04-0.06%；Surplus is Al.
Preferably, the high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：
Si：0.68%；Fe：0.27%；Cu：0.32%；Mn：0.14%；Mg：0.88%；Zn：0.01%；Ti：
0.05%；Surplus is Al.
The applicant additionally provides a kind of preparation method of high intensity hard disk aluminium alloy, comprises the following steps that：
(1) metallic silicon and aluminium copper are first thrown in smelting furnace, then puts into aluminium ingot covering alloy, heats up and aluminium ingot is carried out
Fusing；Fusion temperature is controlled at 720-760 DEG C；Fusing time 3-4 hours；
(2) and then nitrogen is opened, pressure is adjusted in 0.05-0.10Mpa；Aluminium liquid is carried out to refine 15-20 minutes, surface
Scum silica frost clean out, analysis is sampled to aluminium liquid；
(3) chalybeate and manganese agent are added according to analysis numerical value；8-15 minutes are stirred, second is carried out and refines, refining time is
20-30 minutes；The scum silica frost on surface is cleaned out, second of sampling analysis is carried out to aluminium liquid；
(4) titanium agent and magnesium metal are added according to analysis numerical value, then carries out third time refining, refining time 15-20 minutes；
The scum silica frost on surface is cleaned out, analysis is sampled to aluminium liquid；
(5) after composition alloy, nitrogen pressure is adjusted to 0.01-0.05Mpa；5-10 points of low pressure exhaust is carried out to aluminium liquid
Clock；
(6) aluminium liquid static 15-30 minutes, casting is prepared；
(7) casting starts preceding convective tank, mould carries out toasting 25-35 minutes, and furnace is then heated to 760-780
DEG C, for mould temperature control at 700-720 DEG C, water-carrying capacity control uses argon gas degasification in 2800-3200ml/min, online degasification,
Blow pressure 0.2-0.4Mpa, cast out bar needed for hard disk；
(8) cast out and carry out bar and carry out the heat treatment that homogenizes, 560-585 DEG C of homogenizing temperature；It is incubated 7-9 hours；Then it is cold
But, the type of cooling is Forced water cooling；
(9) bar after homogeneous is cut into short material, length tolerance controls in ± 1mm, then shells surface scale
Totally, outer diameter tolerance control prepares follow-up extruding in ± 1mm；
(10) when extruding, bar enters heating furnace and is warmed to 480-520 DEG C；Mould is heated to 460-480 DEG C, squeezes out required
The square rod wanted；
(11) square rod bar stock is heated to 400-460 DEG C by meshbeltfurnace；It is put into forcing press and carries out rough forging；
(12) blank carries out Quenching Treatment, 530-540 DEG C of hardening heat；It is quick to enter cooling water after being incubated 35-45 minutes
Cooling；
(13) and then Ageing Treatment, 170-180 DEG C of aging temp；It is incubated 7-9 hours；
(14) small powder is finally cut into, small powder passes through Cutter Body Processing with Machining Center into required hard disk shape.
The present invention is beneficial to be had technical effect that：
The hard disk aluminium alloy good impact resistance that the present invention is prepared, intensity and hardness have carrying for several times than common hard disc
It is high.After being prepared into hard disk shape, surface is without cold shut, crackle, and defect is considerably less, and inoxidizability and corrosion resistance are all splendid.
Embodiment
With reference to embodiment, the present invention is specifically described.
Embodiment 1：
A kind of high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：
Si：0.65%；Fe：0.25%；Cu：0.3%；Mn：0.1%；Mg：0.86%；Zn：0.01%；Ti：0.04%；
Surplus is Al.
The preparation method of the hard disk aluminium alloy is：
(1) metallic silicon and aluminium copper are first thrown in smelting furnace, then puts into aluminium ingot covering alloy, heats up and aluminium ingot is carried out
Fusing；Fusion temperature is controlled at 760 DEG C；Fusing time 3 hours；
(2) and then nitrogen is opened, pressure is adjusted in 0.10Mpa；Refining 15 minutes is carried out to aluminium liquid, the scum silica frost surface is clear
Reason is clean, and analysis is sampled to aluminium liquid；
(3) chalybeate and manganese agent are added according to analysis numerical value；Stirring 15 minutes, carry out second and refine, refining time 20
Minute；The scum silica frost on surface is cleaned out, second of sampling analysis is carried out to aluminium liquid；
(4) titanium agent and magnesium metal are added according to analysis numerical value, then carries out third time refining, refining time 20 minutes；
The scum silica frost on surface is cleaned out, and analysis is sampled to aluminium liquid；
(5) after composition alloy, nitrogen pressure is adjusted to 0.01Mpa；Low pressure is carried out to aluminium liquid to be vented 10 minutes, is prevented
Aluminium liquid rolling causes greatly very much suction hydrogen serious；
(6) static 15 minutes of aluminium liquid, casting is prepared；
(7) casting starts preceding convective tank, mould carries out baking 35 minutes, furnace is then heated to 760 DEG C, mould
At 720 DEG C, water-carrying capacity controls in 2800ml/min temperature control, and online degasification uses argon gas degasification, blow pressure 0.2Mpa, casting
Produce bar needed for hard disk；
(8) cast out and carry out bar and carry out the heat treatment that homogenizes, 585 DEG C of homogenizing temperature；Insulation 7 hours；The type of cooling is strong
Water cooling processed, allows Mg2Si fully separates out raising performance；
(9) bar after homogeneous is cut into short material, length tolerance controls in ± 1mm, then shells surface scale
Totally, outer diameter tolerance control prepares follow-up extruding in ± 1mm；
(10) when extruding, bar enters heating furnace and is warmed to 520 DEG C；Mould is heated to 460 DEG C, squeezes out required side
Rod；
(11) square rod bar stock is heated to 460 DEG C by meshbeltfurnace；It is put into forcing press and carries out rough forging；
(12) blank carries out Quenching Treatment, 530 DEG C of hardening heat；Insulation quickly cools down after 45 minutes into cooling water；
(13) and then Ageing Treatment, 170 DEG C of aging temp；Insulation 9 hours；
(14) small powder is finally cut into, small powder passes through Cutter Body Processing with Machining Center into required hard disk shape.
Embodiment 2：
A kind of high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：
Si：0.68%；Fe：0.27%；Cu：0.32%；Mn：0.14%；Mg：0.88%；Zn：0.01%；Ti：
0.05%；Surplus is Al.
The preparation method of the hard disk aluminium alloy is：
(1) metallic silicon and aluminium copper are first thrown in smelting furnace, then puts into aluminium ingot covering alloy, heats up and aluminium ingot is carried out
Fusing；Fusion temperature is controlled at 740 DEG C；Fusing time 3.5 hours；
(2) and then nitrogen is opened, pressure is adjusted in 0.08Mpa；Refining 18 minutes is carried out to aluminium liquid, the scum silica frost surface is clear
Reason is clean, and analysis is sampled to aluminium liquid；
(3) chalybeate and manganese agent are added according to analysis numerical value；Stirring 12 minutes, carry out second and refine, refining time 25
Minute；The scum silica frost on surface is cleaned out, second of sampling analysis is carried out to aluminium liquid；
(4) titanium agent and magnesium metal are added according to analysis numerical value, then carries out third time refining, refining time 17 minutes；
The scum silica frost on surface is cleaned out, and analysis is sampled to aluminium liquid；
(5) after composition alloy, nitrogen pressure is adjusted to 0.03Mpa；Low pressure is carried out to aluminium liquid to be vented 8 minutes, is prevented
Aluminium liquid rolling causes greatly very much suction hydrogen serious；
(6) static 12 minutes of aluminium liquid, casting is prepared；
(7) casting starts preceding convective tank, mould carries out baking 30 minutes, furnace is then heated to 770 DEG C, mould
At 710 DEG C, water-carrying capacity controls in 3000ml/min temperature control, and online degasification uses argon gas degasification, blow pressure 0.3Mpa, casting
Produce bar needed for hard disk；
(8) cast out and carry out bar and carry out the heat treatment that homogenizes, 575 DEG C of homogenizing temperature；Insulation 8 hours；The type of cooling is strong
Water cooling processed, allows Mg2Si fully separates out raising performance；
(9) bar after homogeneous is cut into short material, length tolerance controls in ± 1mm, then shells surface scale
Totally, outer diameter tolerance control prepares follow-up extruding in ± 1mm；
(10) when extruding, bar enters heating furnace and is warmed to 500 DEG C；Mould is heated to 470 DEG C, squeezes out required side
Rod；
(11) square rod bar stock is heated to 430 DEG C by meshbeltfurnace；It is put into forcing press and carries out rough forging；
(12) blank carries out Quenching Treatment, 535 DEG C of hardening heat；Insulation quickly cools down after 40 minutes into cooling water；
(13) and then Ageing Treatment, 175 DEG C of aging temp；Insulation 8 hours；
(14) small powder is finally cut into, small powder passes through Cutter Body Processing with Machining Center into required hard disk shape.
Embodiment 3：
A kind of high intensity hard disk aluminium alloy, is made up of the metallic element of following percetage by weight：
Si：0.7%；Fe：0.3%；Cu：0.35%；Mn：0.15%；Mg：0.90%；Zn：0.03%；Ti：0.06%；
Surplus is Al.
The preparation method of the hard disk aluminium alloy is：
(1) metallic silicon and aluminium copper are first thrown in smelting furnace, then puts into aluminium ingot covering alloy, heats up and aluminium ingot is carried out
Fusing；Fusion temperature is controlled at 720 DEG C；Fusing time 4 hours；
(2) and then nitrogen is opened, pressure is adjusted in 0.05Mpa；Refining 20 minutes is carried out to aluminium liquid, the scum silica frost surface is clear
Reason is clean, and analysis is sampled to aluminium liquid；
(3) chalybeate and manganese agent are added according to analysis numerical value；Stirring 8 minutes, carry out second and refine, refining time is 30 points
Clock；The scum silica frost on surface is cleaned out, second of sampling analysis is carried out to aluminium liquid；
(4) titanium agent and magnesium metal are added according to analysis numerical value, then carries out third time refining, refining time 15 minutes；
The scum silica frost on surface is cleaned out, and analysis is sampled to aluminium liquid；
(5) after composition alloy, nitrogen pressure is adjusted to 0.05Mpa；Low pressure is carried out to aluminium liquid to be vented 5 minutes, is prevented
Aluminium liquid rolling causes greatly very much suction hydrogen serious；
(6) static 30 minutes of aluminium liquid, casting is prepared；
(7) casting starts preceding convective tank, mould carries out baking 25 minutes, furnace is then heated to 780 DEG C, mould
At 700 DEG C, water-carrying capacity controls in 3200ml/min temperature control, and online degasification uses argon gas degasification, blow pressure 0.4Mpa, casting
Produce bar needed for hard disk；
(8) cast out and carry out bar and carry out the heat treatment that homogenizes, 560 DEG C of homogenizing temperature；Insulation 9 hours；The type of cooling is strong
Water cooling processed, allows Mg2Si fully separates out raising performance；
(9) bar after homogeneous is cut into short material, length tolerance controls in ± 1mm, then shells surface scale
Totally, outer diameter tolerance control prepares follow-up extruding in ± 1mm；
(10) when extruding, bar enters heating furnace and is warmed to 480 DEG C；Mould is heated to 480 DEG C, squeezes out required side
Rod；
(11) square rod bar stock is heated to 400 DEG C by meshbeltfurnace；It is put into forcing press and carries out rough forging；
(12) blank carries out Quenching Treatment, 540 DEG C of hardening heat；Insulation quickly cools down after 35 minutes into cooling water；
(13) and then Ageing Treatment, 180 DEG C of aging temp；Insulation 7 hours；
(14) small powder is finally cut into, small powder passes through Cutter Body Processing with Machining Center into required hard disk shape.
Test case 1：Mechanical property
The embodiment 1-3 aluminium alloys being prepared are processed into the thick aluminium flakes of 1mm, performance test are carried out, using GBT
228.1-2010 the method provided, test result are as shown in table 1.
Table 1
Test case 2：Corrosion resistance
After aluminum alloy materials polishing that embodiment 1~3 is prepared is smooth, be placed on humidity be 80%, temperature 80
DEG C ventilation cupboard in, the defects of forward and backward aluminum alloy material surface is placed in observation quantity, each diameter is more than 1 micron of pit
For a defect, unit is " individual/cm2”.As a result it is as shown in table 2.
Table 2
| Embodiment | Before placement | After placing 30 days | After placing 60 days | After placing 90 days |
| 1 | 1 | 3 | 4 | 5 |
| 2 | 0 | 1 | 2 | 3 |
| 3 | 1 | 2 | 3 | 4 |
It can see from the data of table 2, the hard disk aluminium alloy that is prepared of the present invention is for high temperature, high humidity, oxidation
Resistance is very high, can keep two months optimal performances in extreme circumstances, and more obvious surface damage is just had after 3 months
Wound.According to derivation, aluminium alloy of the invention is as 1.8~2.3 times that the service life of hard disk is common hard disc on the market.
Claims (3)
1. a kind of high intensity hard disk aluminium alloy, it is characterised in that be made up of the metallic element of following percetage by weight：
Si：0.65-0.7%；Fe：0.25-0.3%；Cu：0.3-0.35%；Mn：0.1-0.15%；Mg：0.86-0.90%；Zn
≤ 0.05%；Ti：0.04-0.06%；Surplus is Al.
2. a kind of high intensity hard disk aluminium alloy, it is characterised in that be made up of the metallic element of following percetage by weight：
Si：0.68%；Fe：0.27%；Cu：0.32%；Mn：0.14%；Mg：0.88%；Zn：0.01%；Ti：0.05%；It is remaining
Measure as Al.
3. a kind of preparation method of high intensity hard disk aluminium alloy, it is characterised in that comprise the following steps that：
(1) metallic silicon and aluminium copper are first thrown in smelting furnace, aluminium ingot covering alloy is then put into, heats up and aluminium ingot is melted
Change；Fusion temperature is controlled at 720-760 DEG C；Fusing time 3-4 hours；
(2) and then nitrogen is opened, pressure is adjusted in 0.05-0.10Mpa；Aluminium liquid is carried out to refine 15-20 minutes, the floating of surface
Slag is cleaned out, and analysis is sampled to aluminium liquid；
(3) chalybeate and manganese agent are added according to analysis numerical value；8-15 minutes are stirred, second is carried out and refines, refining time 20-30
Minute；The scum silica frost on surface is cleaned out, second of sampling analysis is carried out to aluminium liquid；
(4) titanium agent and magnesium metal are added according to analysis numerical value, then carries out third time refining, refining time 15-20 minutes；Table
The scum silica frost in face is cleaned out, and analysis is sampled to aluminium liquid；
(5) after composition alloy, nitrogen pressure is adjusted to 0.01-0.05Mpa；Low pressure exhaust 5-10 minutes are carried out to aluminium liquid；
(6) aluminium liquid static 15-30 minutes, casting is prepared；
(7) casting starts preceding convective tank, mould carries out toasting 25-35 minutes, and furnace is then heated to 760-780 DEG C,
For mould temperature control at 700-720 DEG C, water-carrying capacity control uses argon gas degasification, degasification in 2800-3200ml/min, online degasification
Pressure 0.2-0.4Mpa, cast out bar needed for hard disk；
(8) cast out and carry out bar and carry out the heat treatment that homogenizes, 560-585 DEG C of homogenizing temperature；It is incubated 7-9 hours；Then cool down, it is cold
But mode is Forced water cooling；
(9) bar after homogeneous being cut into short material, length tolerance is controlled in ± 1mm, is then shelled surface scale totally,
Outer diameter tolerance is controlled in ± 1mm, prepares follow-up extruding；
(10) when extruding, bar enters heating furnace and is warmed to 480-520 DEG C；Mould is heated to 460-480 DEG C, required for squeezing out
Square rod；
(11) square rod bar stock is heated to 400-460 DEG C by meshbeltfurnace；It is put into forcing press and carries out rough forging；
(12) blank carries out Quenching Treatment, 530-540 DEG C of hardening heat；Quickly cooled down into cooling water after insulation 35-45 minutes；
(13) and then Ageing Treatment, 170-180 DEG C of aging temp；It is incubated 7-9 hours；
(14) small powder is finally cut into, small powder passes through Cutter Body Processing with Machining Center into required hard disk shape.
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| CN109097644A (en) * | 2018-10-10 | 2018-12-28 | 江苏亚太安信达铝业有限公司 | A method of for spindle high-strength aluminum alloy and its prepare spindle |
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