CN1055136C - Casting-state aluminium alloy and its prepn. method - Google Patents
Casting-state aluminium alloy and its prepn. method Download PDFInfo
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- CN1055136C CN1055136C CN96117663A CN96117663A CN1055136C CN 1055136 C CN1055136 C CN 1055136C CN 96117663 A CN96117663 A CN 96117663A CN 96117663 A CN96117663 A CN 96117663A CN 1055136 C CN1055136 C CN 1055136C
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Abstract
The present invention relates to a casting state aluminium alloy and a preparation method thereof. The casting state aluminium alloy comprises 9.0 to 14.2% of Zn, 7.5 to 10.0% of Si, 0.3 to 0.6% of Ti, 0.35 to 0.5% of Mg, and balance of Al. The casting state aluminium alloy is prepared by the steps of production preparation, batch smelting, magnesium press processing by a bell jar, degassing treatment, modification treatment, sampling inspection, static placement and pouring. The present invention has good comprehensive mechanical property and the simple technology preparation method, and particularly, the present invention has the advantages of heat treatment procedure cancellation, production period shortening and energy consumption reduction; a waste product which is generated in the heat treatment procedure is prevented. Accordingly, product quality is improved, and the industrial application and the development of the aluminium alloy are prompted.
Description
The present invention relates to a kind of cast aluminium alloy, especially as-cast aluminum alloy and preparation method thereof.
As everyone knows, aluminium alloy has many premium propertiess, and its application in machinery manufacturing industry is very extensive, and particularly along with the light-weighted development of industrial material (as automotive industry), the application of aluminium alloy more increases.Because many premium propertiess of aluminum current alloy, especially mechanics---the rational faculty can, obtain by thermal treatment, and the thermal treatment of aluminium alloy not only temperature (solution strengthening temperature) require high, and temperature control ratio difficulty, the time is long simultaneously, current consumption is big, operation is many, thus in heat treatment process, easily cause waste product, and expenses is bigger.Thereby it becomes " Root of Clark Clematis " that the aluminium alloy industrial production is used, has seriously hindered the development of aluminium alloy in industrial application.
The purpose of this invention is to provide a kind of as-cast aluminum alloy and preparation method thereof, aluminium alloy need not heat-treated in as cast condition just can use, and have good casting technique performance and comprehensive mechanical performance.Thereby the use value of expansion aluminium alloy shortens the production cycle, reduces energy consumption and production costs.
The object of the present invention is achieved like this: make a kind of as-cast aluminum alloy that is used for machinery manufacturing industry, it is characterized in that it is by Zn:9.0～14.2%; Si:7.5～10.0%; Ti:0.3～0.6%; Mg:0.35～0.6%; Surplus is that Al forms.
The present invention produces by above-mentioned component, and its preparation method is undertaken by the several steps of following order:
Production preparation → melting in batches → bell jar pressure magnesium processing → degassing processing → go bad and handle → take a sample to check → leave standstill → pour into a mould.
Wherein: produce and prepare to comprise: A. is equipped with furnace charge, chooses aluminium ingot, zinc ingot metal, magnesium ingot, aluminium titanium master alloy and aluminium silicon master alloy; B. crucible, melting instrument are cleaned out, and coating; C. to furnace charge and melting instrument carry out preheating in batches melting be aluminium ingot, aluminium silicon master alloy, ferro-aluminum master alloy, zinc ingot metal to be added successively in batches carry out melting in the crucible, treat fine melt after, the liquid temperature of aluminium alloy is 680 °～720 ℃.
The present invention utilizes its alloy to have the advantage of " quenching automatically " based on the Al-Zn alloy, and being convenient to give full play to and utilize can be in the characteristic of as cast condition application.In the Al-Zn alloy, add an amount of Si, Ti, Mg alloying element, by the alloying effect, adjust and transform the metallographic structure state status of alloy, reach and improve casting technique performance and comprehensive mechanical performance index, the usefulness that development aluminium alloy as cast condition is used.
In alloy, add an amount of Si element, content range is defined as 7.5～10%, can makes alloy structure be in the eutectic state, its crystallization range is little, have good casting technique performance and comprehensive mechanical performance condition, and can guarantee the machinability of as-cast aluminum alloy.In alloy, add the Ti element of some amount, will form TiAl
3High melting compound (TiAl
3Be the tetragonal body lattice, lattice parameter: a=5.42A °, c=8.57A °), can impel the alloy substrate tissue to obtain refinement as external nucleus, realize strengthening effect by the fining metal matrix.In the Al-Zn-Si-Ti alloy, add an amount of Mg element, its objective is the heat resistance energy that improves alloy, reduce the wall thickness effect, improve hot cracking tendency effectively, thus the potentiality of performance castability.
The present invention adopts melting in batches, is with aluminium ingot, aluminium silicon master alloy, aluminium titanium master alloy, zinc ingot metal according to the batching number from big to small, and molten point adds successively from low to high and carries out melting in the crucible.Like this, being convenient to each element thoroughly fuses.Carrying out bell jar and press magnesium to handle after melting in batches, is that MAG block is packed in the bell jar, be pressed into then in the aluminium liquid so that Mg burning less as much as possible, preferably evenly scattering and permeating in aluminium liquid.After bell jar is pressed the magnesium processing, carry out degassing processing, its objective is the gas in the aluminium alloy solution is excreted that the product of avoiding pouring into a mould has pore.Because the silicon content higher (greater than 6%) in the aluminium alloy solution in order to change its structural state, adds alterant and handles, and makes grain structure obtain refinement, thereby improves casting technique performance and mechanical property.
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a process flow sheet of the present invention.
As shown in Figure 1, preparation process of the present invention is: one. produce and prepare:
1. get the raw materials ready by following composition and content:
1.. zinc ingot metal: zinc content is 9.2%;
2.. magnesium ingot: magnesium content is 0.45%;
3.. the ferro-aluminum master alloy: the titaniferous amount is 0.38%;
4.. aluminium silicon master alloy: silicon content is 8.5%;
5.. its surplus is an aluminium.
2. crucible, melting instrument are cleaned out and coating.
3. furnace charge and melting instrument are carried out preheating.Two. melting in batches:
Blow-on heats up, and alloy material is added successively by aluminium ingot, aluminium silicon master alloy, aluminium titanium master alloy, zinc ingot metal in batches carry out melting in the crucible, treat fine melt after, measuring temperature of aluminum liquid is 680 °～720 ℃.Three. bell jar presses magnesium to handle:
When temperature of aluminum liquid this during to 700～720 ℃, with bell jar MAG block is pressed in the aluminium liquid, the degree of depth of bell jar in aluminium liquid is to move about in 2/3 place, so that magnesium is even at aluminium liquid internal diffusion.Four. degassing processing:
In aluminium liquid, feed argon gas with the argon gas device, treat to stop after 8～10 minutes.Gas in argon gas evaporable while aluminum solutions is also discharged thereupon.Five. the rotten processing:
When temperature of aluminum liquid is 730～750 ℃, add alterant.Alterant is sprinkling upon aluminium liquid surface equably, keeps after 8～10 minutes, with pressing spoon that alterant is pressed in the aluminium liquid, by stirring, make the alloy grain tissue obtain abundant refinement, the agent evaporable is simultaneously on the turn, slag in the aluminium liquid floats over aluminium liquid surface, with spoon scum silica frost is taken off then.Six. take a sample to check:
With the casting ladle aluminium liquid that takes a morsel, water into test block, fractograph is checked in the cooling back, observes modification effect.Seven. left standstill 8～10 minutes.Eight. cast:
Teeming temperature determines according to product structure.Example: cast cylinder head (automobile engine of light car is used), adopt gravity casting method, quantitatively cast, its teeming temperature is 740～760 ℃.
The present invention obtains significant effect owing to adopted above-mentioned component and preparation method in test and in using.Show that by detection of Institute of Analysis of Chengdu Univ. of Science ﹠ Technology of State Education Commission and the test of physics and chemistry inspection center of Chengdu Engine Co. the present invention has good cast structure's state and comprehensive mechanical performance, its performance index are as follows:
Tensile strength (σ
b) 244.3～288.2N/mm
2
Yield strength (σ
0.2) 205.7～208.2N/mm
2
Unit elongation (δ) 2.5～3.2%;
Hardness (HB) 86～94
The present invention compares with the Castingother aluminium alloy, and outstanding feature is need not heat-treat, in casting Attitude just can be used, and has the premium properties of aluminium gold. The contrast situation of it and Zl101 aluminium alloy sees the following form:
| The alloy classification | Material | Tensile strength | Bend intensity | Percentage elongation | Hardness |
| State | σ b N/mm 2 | σ 0.2 N/mm 2 | δ％ | HB | |
| The Zl101 aluminium alloy | T 6 | 200～240 | 170～210 | 2～3 | 70～80 |
| As-cast aluminum alloy | As cast condition | 244.2～288.2 | 205.7～208.2 | 2.5～3.2 | 86～94 |
This shows: the present invention not only has good comprehensive mechanical performance, and its preparation process letter Single, the more important thing is that the present invention has cancelled heat treatment step, thereby shortened the production cycle, reduced energy Consumption has been avoided the waste product that produces in the heat treatment step, thereby has been improved product quality, decrease Cost. The product that utilizes the present invention to cast has good comprehensive mechanical performance, and just can make in as cast condition With, therefore, the present invention has preferably economic benefit and social benefit, and it will further promote aluminium alloy Development in commercial Application.
Claims (3)
1. as-cast aluminum alloy is by Zn:9.0～14.2%; Si:7.5～10.0%; Ti:0.3～0.6%; Mg:0.35～0.6%; Surplus is that Al forms.
2. the preparation method of an as-cast aluminum alloy as claimed in claim 1, several steps in the following order carries out:
Production preparation → melting in batches → bell jar pressure magnesium processing → degassing processing → go bad and handle → take a sample to check → leave standstill → pour into a mould; Wherein:
Produce and prepare to comprise: A. is equipped with furnace charge, chooses aluminium ingot, zinc ingot metal, magnesium ingot, aluminium titanium master alloy and aluminium silicon master alloy; B. crucible, melting instrument are cleaned out, and coating; C. furnace charge and melting instrument are carried out preheating;
Melting is that aluminium ingot, aluminium silicon master alloy, aluminium titanium master alloy, zinc ingot metal are added in the melting of carrying out in the crucible successively in batches in batches, Jin Ronghou, and the liquid temperature of aluminium alloy is 680 °～720 °;
Bell jar presses magnesium to handle: when temperature of aluminum liquid reaches 700～720 ℃, with bell jar MAG block is pressed in the aluminium liquid, compression distance is the 2/3 aluminium liquid degree of depth;
Degassing processing is to feed argon gas with the argon gas device in aluminium liquid, treats to stop after 8～10 minutes;
The rotten processing:, add alterant when temperature of aluminum liquid is 730～750 ℃; Earlier alterant is sprinkling upon aluminium liquid surface equably, keeps after 8～10 minutes,, stir with pressing spoon that alterant is pressed in the aluminium liquid;
Time of repose is 8～10 minutes.
3. the preparation method of as-cast aluminum alloy according to claim 2, it is characterized in that producing in the preparation to be equipped with furnace charge be to get the raw materials ready by following composition and content:
1.. zinc ingot metal: zinc content is 9.2%;
2.. magnesium ingot: magnesium content is 0.45%;
3.. aluminium titanium master alloy: the titaniferous amount is 0 38%;
4.. aluminium silicon master alloy: silicon content is 8.5%;
5.. its surplus is an aluminium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117663A CN1055136C (en) | 1996-08-14 | 1996-08-14 | Casting-state aluminium alloy and its prepn. method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117663A CN1055136C (en) | 1996-08-14 | 1996-08-14 | Casting-state aluminium alloy and its prepn. method |
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| Publication Number | Publication Date |
|---|---|
| CN1173547A CN1173547A (en) | 1998-02-18 |
| CN1055136C true CN1055136C (en) | 2000-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96117663A Expired - Lifetime CN1055136C (en) | 1996-08-14 | 1996-08-14 | Casting-state aluminium alloy and its prepn. method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443712B (en) * | 2010-10-11 | 2013-05-22 | 贵州航天风华精密设备有限责任公司 | Casting method for high-strength cast aluminum alloy |
| CN103667826B (en) * | 2014-01-06 | 2016-03-30 | 山东建筑大学 | A kind of Strong-strength abrasion-proof cast aluminum alloy |
| CN105624487A (en) * | 2015-04-07 | 2016-06-01 | Sj技术股份有限公司 | Aluminum alloy for pressure casting and preparation method for aluminum alloy casting piece utilizing aluminum alloy for pressure casting |
| CN106282697A (en) * | 2015-06-05 | 2017-01-04 | Sj技术股份有限公司 | Aluminium diecasting alloy compositions, the casting piece utilizing it and manufacture method |
| CN106381424A (en) * | 2016-11-24 | 2017-02-08 | 苏州华意铭铄激光科技有限公司 | High-performance composite aluminum-based metal product |
| CN114107718A (en) * | 2021-11-30 | 2022-03-01 | 湖北谷城县东华机械股份有限公司 | Alloy casting process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5356114A (en) * | 1976-11-01 | 1978-05-22 | Mitsubishi Metal Corp | Bright corrosion resistant al alloy for die casting |
| JPS5465110A (en) * | 1977-11-04 | 1979-05-25 | Mitsubishi Metal Corp | Bright, corrosion resistant al alloy for die casting |
-
1996
- 1996-08-14 CN CN96117663A patent/CN1055136C/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5356114A (en) * | 1976-11-01 | 1978-05-22 | Mitsubishi Metal Corp | Bright corrosion resistant al alloy for die casting |
| JPS5465110A (en) * | 1977-11-04 | 1979-05-25 | Mitsubishi Metal Corp | Bright, corrosion resistant al alloy for die casting |
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| Publication number | Publication date |
|---|---|
| CN1173547A (en) | 1998-02-18 |
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