CN106312007A - Aluminum alloy pressure casting technology for automobile sheet - Google Patents
Aluminum alloy pressure casting technology for automobile sheet Download PDFInfo
- Publication number
- CN106312007A CN106312007A CN201610785333.9A CN201610785333A CN106312007A CN 106312007 A CN106312007 A CN 106312007A CN 201610785333 A CN201610785333 A CN 201610785333A CN 106312007 A CN106312007 A CN 106312007A
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- casting
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a pressure casting technology for pressure casting aluminum alloy which is used for automobile sheets and has excellent mechanical property. The technology comprises die assembly locking, vacuumizing, pressure casting, demoulding cleaning, solid solution-quenching treatment and two-stage aging. Optimal aluminum alloy pressure casting filling parameters and heat treatment industrial steps are selected to obtain an aluminum alloy with the excellent mechanical property. Meanwhile, bubbles are prevented from forming in metal parts obtained after pressure casting, and the product quality is improved.
Description
Technical field
The present invention relates to foundary industry technical field, a kind of aluminum alloy die-casting technological for automobile board.
Background technology
Aluminum and alloy thereof because of have the mechanical property of excellence, corrosion resistance, processability and favored, simultaneously from ancient times
In addition 2.17g/cm2Low-density, aluminium alloy is that the structural type typically used gently closes, in automobile, boats and ships, transporter, family
The every field such as electrical article, idea communication apparatus, building materials are all widely used.The energy the most serious especially for reply is short
Lack and the problem such as environmental pollution, it is necessary to the consumption of the fuel oil that practices every conceivable frugality and the strict discharge controlling the gases such as carbon dioxide, and
The quality of transportation product often alleviates 10%, it is possible to making oil consumption decline at least 5%, corresponding gas discharges also natural energy
Access effective control, and be used for producing accordingly by the aluminium alloy with high specific strength and specific stiffness and other excellent properties
The manufacture of product, solves the method that the problems referred to above are the most feasible beyond doubt.
Compression casting be aluminum and alloy thereof now casting method in one of the higher advanced preparation method of technology content, its
Advantage of lower cost, and production efficiency is high, the aluminum alloy surface quality prepared is good, dimensional accuracy is high, it is possible to meet automobile
Industrial part is for the requirement standard of alloy product.But how to select preferably aluminium alloy compression casting to fill shape parameter and heat treatment
Industry step is always the research topic that related researcher pays close attention to the most.
It is thus desirable to a kind of reasonable, practical aluminum alloy die-casting technological for automobile board is the most promising.
Summary of the invention
Goal of the invention: the shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of reasonable, practical
The aluminum alloy die-casting technological for automobile board.
Technical scheme: in order to realize object above, a kind of aluminium alloy compression casting work for automobile board of the present invention
Skill, comprises the steps:
Matched moulds locks: fixing mould keeps with movable mold contacting formation die cavity, and locks closed die；
Evacuation: with the pipeline being connected with vacuum pump on fixing mould, the air in die cavity is extracted out and is made type by vacuum pump
Intracavity forms vacuum；
Die casting: be pressed in the mold cavity of preheated at least 180 DEG C after melt is cooled to 650 DEG C, wherein fills type and starts
Time melt flow be 0.5-0.6m/s, casting pressure be 60-65Mpa, fill type rate more than 60% after, reduce melt flow velocity extremely
0.1-0.2m/s, casting pressure are 75-80Mpa, terminate until filling type die casting；
The demoulding is cleared up: after motlten metal is hardened to metallic article, cover half separates with dynamic model, and clears up the pressure after the demoulding
Casting foundry goods；
Solid solution-Quenching Treatment: die casting foundry goods is obtained aluminum alloy plate materials after cold rolling or hot rolling, then by aluminium alloy
Sheet material carries out water quenching cooling after salt bath solution treatment 1-3min under the conditions of 500-550 DEG C；
Two-stage timeliness: first by the salt bath insulation under conditions of 80-90 DEG C of the aluminum alloy plate materials through solid solution-Quenching Treatment
3.5-4h, the most again by aluminum alloy plate materials salt bath insulation 100-110h under conditions of 40-45 DEG C, finally gives die casting after taking-up
Model.
As preferably, described melt flow when type starts of filling is 0.55m/s；
As preferably, described casting pressure when type starts that fills is 63Mpa；
As preferably, after described type rate of filling is more than 60%, reduction melt flow is 0.15m/s；
As preferably, after described type rate of filling is more than 60%, casting pressure is 78Mpa；
As preferably, described in fill type and terminate rear pressurize 5-8min；
As preferably, sheet material is come out of the stove, and the time into water, less than 3 seconds and the temperature of cooling water was less than 25 DEG C；
1, heretofore described a kind of aluminum alloy die-casting technological for automobile board, by described fill type start time
Melt flow be 0.55m/s, speed during initial is the fastest, and the melt forming being filled with is the fastest, cooling molding after casting
Part quality is the highest；
2, heretofore described a kind of aluminum alloy die-casting technological for automobile board, by described fill type start time
Casting pressure be 63Mpa so that the aluminium alloy of molten condition at high temperature under high pressure can be with Slow cooling；
3, heretofore described a kind of aluminum alloy die-casting technological for automobile board, is exceeded by described type rate of filling
After 60%, reduction melt flow is 0.15m/s, and ending filling velocity is the slowest, and the beneficially discharge of bubble in die cavity decreases die cavity
The shrinkage cavity of inwall；
4, heretofore described a kind of aluminum alloy die-casting technological for automobile board, is exceeded by described type rate of filling
After 60%, casting pressure is 78Mpa, and in during ending, increase casting pressure is conducive to die cavity, the precipitation of remainder melt merges, it is to avoid
In die cavity, the shrinkage cavity at bubble and inwall produces；
5, heretofore described a kind of aluminum alloy die-casting technological for automobile board, is protected after type terminates by described filling
Pressure 5-8min so that the air pressure in die cavity will cause casting temperature quickly to cool down because of rapid drawdown；
6, heretofore described a kind of aluminum alloy die-casting technological for automobile board, is come out of the stove into water by described sheet material
Less than 3 seconds and the temperature of cooling water was less than 25 DEG C, further Optimizing Process Parameters time, obtain the aluminium alloy of excellent performance；
It is an advantage of the current invention that: (1) is vacuum state in using evacuation to make die cavity before filling type so that melted gold
Belong to and do not have gas to be trapped in die cavity when injecting die cavity, form bubble in preventing the metalwork of die casting, improve product quality；
(2) have selected optimal die-casting technological parameter to obtain the aluminium alloy of excellent performance；(3) poring rate is controlled, molten metal
Can relatively smooth enter casting mold, it is possible to reduce the hot cracking tendency of foundry goods, eliminate the hidden danger of hot tearing to a certain extent；
(4) have employed maximally efficient two-stage aging technique and parameter, improve the performance of aluminium alloy to greatest extent；(5) type knot is filled
Pressurize 5 8min after bundle so that the air pressure in die cavity will cause casting temperature quickly to cool down because of rapid drawdown；(6) sheet material is come out of the stove
Less than 3 seconds and the temperature of cooling water was less than 25 DEG C to enter time of water, and further Optimizing Process Parameters, the aluminum obtaining excellent performance closes
Gold.
Detailed description of the invention
Embodiment 1
Need before die casting to carry out a series of preparation, including the inspection of raw and process materials, store, protect, melting, the conveying of aluminum water and
One layer of releasing agent of die casting surface spraying.Extrusion process specifically includes following steps:
Matched moulds locks: fixing mould keeps with movable mold contacting formation die cavity, and locks closed die；
Evacuation: with the pipeline being connected with vacuum pump on fixing mould, the air in die cavity is extracted out and is made type by vacuum pump
Intracavity forms vacuum；
Die casting: be pressed in the mold cavity of preheated at least 180 DEG C after melt is cooled to 650 DEG C, wherein fills type and starts
Time melt flow be 0.5m/s, casting pressure be 60Mpa, fill type rate more than 60% after, reduce melt flow velocity to 0.1m/s,
Casting pressure is 75Mpa, terminates until filling type die casting；
The demoulding is cleared up: after motlten metal is hardened to metallic article, cover half separates with dynamic model, and clears up the pressure after the demoulding
Casting foundry goods；
Solid solution-Quenching Treatment: die casting foundry goods is obtained aluminum alloy plate materials after cold rolling or hot rolling, then by aluminium alloy
Sheet material carries out water quenching cooling after salt bath solution treatment 1min under the conditions of 500 DEG C；
Two-stage timeliness: first by the salt bath insulation 3.5h under conditions of 80 DEG C of the aluminum alloy plate materials through solid solution-Quenching Treatment,
The most again by aluminum alloy plate materials salt bath insulation 100h under conditions of 40 DEG C, after taking-up, finally give casting die.
Die casting needs after completing to carry out following process, including blank go the conveying of cast gate, blank, blank cleaning, blank ball blast,
Blank passivation, primary product conveying, primary product machining, finished product inspection, finished product packing and storage eventually.
Embodiment 2
Need before die casting to carry out a series of preparation, including the inspection of raw and process materials, store, protect, melting, the conveying of aluminum water and
One layer of releasing agent of die casting surface spraying.Extrusion process specifically includes following steps:
Matched moulds locks: fixing mould keeps with movable mold contacting formation die cavity, and locks closed die；
Evacuation: with the pipeline being connected with vacuum pump on fixing mould, the air in die cavity is extracted out and is made type by vacuum pump
Intracavity forms vacuum；
Die casting: be pressed in the mold cavity of preheated at least 180 DEG C after melt is cooled to 650 DEG C, wherein fills type and starts
Time melt flow be 0.6m/s, casting pressure be 65Mpa, fill type rate more than 60% after, reduce melt flow velocity to 0.2m/s,
Casting pressure is 80Mpa, terminates until filling type die casting；
The demoulding is cleared up: after motlten metal is hardened to metallic article, cover half separates with dynamic model, and clears up the pressure after the demoulding
Casting foundry goods；
Solid solution-Quenching Treatment: die casting foundry goods is obtained aluminum alloy plate materials after cold rolling or hot rolling, then by aluminium alloy
Sheet material carries out water quenching cooling after salt bath solution treatment 3min under the conditions of 550 DEG C；
Two-stage timeliness: first by the salt bath insulation 4h under conditions of 90 DEG C of the aluminum alloy plate materials through solid solution-Quenching Treatment, with
After again by aluminum alloy plate materials under conditions of 45 DEG C salt bath insulation 110h, finally give casting die after taking-up.
Die casting needs after completing to carry out following process, including blank go the conveying of cast gate, blank, blank cleaning, blank ball blast,
Blank passivation, primary product conveying, primary product machining, finished product inspection, finished product packing and storage eventually.
Embodiment 3
Need before die casting to carry out a series of preparation, including the inspection of raw and process materials, store, protect, melting, the conveying of aluminum water and
One layer of releasing agent of die casting surface spraying.Extrusion process specifically includes following steps:
Matched moulds locks: fixing mould keeps with movable mold contacting formation die cavity, and locks closed die；
Evacuation: with the pipeline being connected with vacuum pump on fixing mould, the air in die cavity is extracted out and is made type by vacuum pump
Intracavity forms vacuum；
Die casting: be pressed in the mold cavity of preheated at least 180 DEG C after melt is cooled to 650 DEG C, wherein fills type and starts
Time melt flow be 0.55m/s, casting pressure be 63Mpa, fill type rate more than 60% after, reduce the flow velocity of melt to 0.15m/
S, casting pressure are 78Mpa, terminate until filling type die casting；
The demoulding is cleared up: after motlten metal is hardened to metallic article, cover half separates with dynamic model, and clears up the pressure after the demoulding
Casting foundry goods；
Solid solution-Quenching Treatment: die casting foundry goods is obtained aluminum alloy plate materials after cold rolling or hot rolling, then by aluminium alloy
Sheet material carries out water quenching cooling after salt bath solution treatment 2min under the conditions of 525 DEG C；
Two-stage timeliness: first by the salt bath insulation 3.8h under conditions of 85 DEG C of the aluminum alloy plate materials through solid solution-Quenching Treatment,
The most again by aluminum alloy plate materials salt bath insulation 105h under conditions of 43 DEG C, after taking-up, finally give casting die.
Die casting needs after completing to carry out following process, including blank go the conveying of cast gate, blank, blank cleaning, blank ball blast,
Blank passivation, primary product conveying, primary product machining, finished product inspection, finished product packing and storage eventually.
The casting die obtained by embodiment 1-3 carries out hot strength, yield strength and hardness 500kg power 10mm ball
Performance test.
Comparative example be existing market sell the trade mark and state be: the aluminium alloy capability parameter of 6061-T651.
Test result is as shown in table 1.
Table 1 embodiment 1-3 and the performance test results of comparative example 1
As can be known from the above table, embodiment 1-3 of the present invention, hot strength ＞ 500Mpa, yield strength ＞ 300Mpa, hard
Degree 500Kg power 10mm ball ＞ 100, the every mechanical property being different from comparative example is more excellent, according to the parameters institute of embodiment 1-3
The aluminium alloy compression casting model quality obtained is higher.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvement, these improvement also should be regarded as the present invention's
Protection domain.
Claims (7)
1., for an aluminum alloy die-casting technological for automobile board, it is characterized in that, including following step:
(1) matched moulds locking: fixing mould keeps with movable mold contacting formation die cavity, and locks closed die；
(2) evacuation: with the pipeline being connected with vacuum pump on fixing mould, the air in die cavity is extracted out and is made die cavity by vacuum pump
Interior formation vacuum；
(3) die casting: be pressed in the mold cavity of preheated at least 180 DEG C after melt is cooled to 650 DEG C, wherein fills type when starting
Melt flow be 0.5-0.6m/s, casting pressure be 60-65Mpa, fill type rate more than 60% after, reduce melt flow velocity extremely
0.1-0.2m/s, casting pressure are 75-80Mpa, terminate until filling type die casting；
(4) demoulding cleaning: after motlten metal is hardened to metallic article, cover half separates with dynamic model, and clears up the pressure after the demoulding
Casting foundry goods；
(5) solid solution-Quenching Treatment: die casting foundry goods is obtained aluminum alloy plate materials after cold rolling or hot rolling, then by aluminium alloy
Sheet material carries out water quenching cooling after salt bath solution treatment 1-3min under the conditions of 500-550 DEG C；
(6) two-stage timeliness: first by the salt bath insulation under conditions of 80-90 DEG C of the aluminum alloy plate materials through solid solution-Quenching Treatment
3.5-4h, the most again by aluminum alloy plate materials salt bath insulation 100-110h under conditions of 40-45 DEG C, finally gives die casting after taking-up
Model.
A kind of aluminum alloy die-casting technological for automobile board the most according to claim 1, it is characterised in that: described fills
Melt flow when type starts is 0.55m/s.
A kind of aluminum alloy die-casting technological for automobile board the most according to claim 1, it is characterised in that: described fills
Casting pressure when type starts is 63Mpa.
A kind of aluminum alloy die-casting technological for automobile board the most according to claim 1, it is characterised in that: described fills
After type rate is more than 60%, reduction melt flow is 0.15m/s.
A kind of aluminum alloy die-casting technological for automobile board the most according to claim 1, it is characterised in that: described fills
After type rate is more than 60%, casting pressure is 78Mpa.
A kind of aluminum alloy die-casting technological for automobile board the most according to claim 1, it is characterised in that fill type described in:
Pressurize 5-8min after end.
A kind of aluminum alloy die-casting technological for automobile board the most according to claim 1, it is characterised in that: described through water
Quenching but sheet material is come out of the stove, and the time into water, less than 3 seconds and the temperature of cooling water was less than 25 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785333.9A CN106312007A (en) | 2016-08-31 | 2016-08-31 | Aluminum alloy pressure casting technology for automobile sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610785333.9A CN106312007A (en) | 2016-08-31 | 2016-08-31 | Aluminum alloy pressure casting technology for automobile sheet |
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| CN106312007A true CN106312007A (en) | 2017-01-11 |
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| CN201610785333.9A Pending CN106312007A (en) | 2016-08-31 | 2016-08-31 | Aluminum alloy pressure casting technology for automobile sheet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102732A (en) * | 2019-06-11 | 2019-08-09 | 天津圣金特汽车配件有限公司 | A kind of aluminium alloy automobile part compression molding process |
| CN111676402A (en) * | 2020-07-07 | 2020-09-18 | 广东鸿特精密技术（台山）有限公司 | Aluminum alloy die-casting process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110102732A (en) * | 2019-06-11 | 2019-08-09 | 天津圣金特汽车配件有限公司 | A kind of aluminium alloy automobile part compression molding process |
| CN111676402A (en) * | 2020-07-07 | 2020-09-18 | 广东鸿特精密技术（台山）有限公司 | Aluminum alloy die-casting process |
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Application publication date: 20170111 |