CN1122726C - Aluminium-silicon alloy without, solidification shrinking and its casting technology - Google Patents
Aluminium-silicon alloy without, solidification shrinking and its casting technology Download PDFInfo
- Publication number
- CN1122726C CN1122726C CN00113943A CN00113943A CN1122726C CN 1122726 C CN1122726 C CN 1122726C CN 00113943 A CN00113943 A CN 00113943A CN 00113943 A CN00113943 A CN 00113943A CN 1122726 C CN1122726 C CN 1122726C
- Authority
- CN
- China
- Prior art keywords
- alloy
- temperature
- silicon alloy
- aluminum silicon
- solidification shrinkage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Silicon Compounds (AREA)
Abstract
The present invention provides an aluminium-silicon alloy without solidification shrinkage and a casting technology thereof. The high-quality aluminium-silicon alloy without solidification shrinkage can be prepared by a P-Cu+RE composite modifier and temperature difference processing. Moreover, the aluminium-silicon alloy not only overcomes casting defects caused by solidification shrinkage, but also has the advantages of favorable mechanical property, favorable air tightness and favorable corrosion resistance. The casting technology does not need special devices, has simple operating technology and can greatly reduce the production cost of castings, so that the present invention is an ideal alloy and a casting technology for manufacturing high-strength wear-resistance parts, such as pistons, cylinder bodies, etc.
Description
The present invention relates to field of metallurgy, further relate to the aluminum silicon alloy technical field, specifically is a kind of no solidification shrinkage aluminum silicon alloy and casting technology thereof.
Volumetric shrinkage in various degree generally all will take place during liquid metal solidification, and volumetric shrinkage is to cause foundry goods to produce the root of casting flaws such as shrinkage cavity, shrinkage porosite, surface depression.For fear of the generation of the casting flaw that causes because of volumetric shrinkage, all to take the feeding measure during general alloy casting, the weight of system of risers is 0.6～3 times of casting weight normally.This not only causes the huge waste of material, the energy and manpower, nor can fundamentally prevent the generation of the casting flaw that caused by volumetric shrinkage.
Aluminium alloy is because proportion is little, intensity height, good toughness and being widely used in during aviation, navigation, space flight, automobile and motorcycle industry produce.In recent years, because the develop rapidly of aviation, navigation, space flight, particularly automobile and motorcycle industry science and technology, need to adopt the silumin material that linear expansivity is very little He wear resistance is very high and mechanical property is good to make foundry goods such as internal combustion engine, housing, aluminum silicon alloy fusing back is widely used in the Foundry Production owing to having good flowability.But the same with other alloy, general aluminum silicon alloy also can produce casting flaws such as shrinkage cavity, shrinkage porosite, surface depression because of volumetric shrinkage when solidifying.The generation of these casting flaws can reduce mechanical property, resistance to air loss and the erosion resistance of foundry goods greatly, avoid the generation of these casting flaws, be still with the system of risers that strengthens foundry goods in the industrial production at present and solve problem, so the production cost of foundry goods is improved greatly.How can make alloy that volumetric shrinkage neither takes place when solidifying, have favorable mechanical performance, resistance to air loss and erosion resistance again, this is the problem that domestic and international scientific worker inquires into always.
Transcocrystallized Al-Si alloy is along with silicone content increases, hardness, intensity improve, and toughness reduces greatly, this mainly be primary silicon thick in the alloy structure mutually due to, so a large amount of research has been done in the refinement of primary silicon in the transcocrystallized Al-Si alloy tissue both at home and abroad in recent years.The process for refining of primary silicon mainly contains in the transcocrystallized Al-Si alloy tissue at present: element refinement method; Ultrasonic wave refinement method; Stir the refinement method; Rapid solidification refinement method; Mix cast refinement method behind the alloy melting of two kinds of heterogeneities; Temperature, soaking time refinement method when the holding temperature of control melt, insulation.As the patent No. is the Japanese Patent of JP63243208, uses the element refinement method of P-Cu as fining agent exactly, and its operating procedure is simple, production cost is low, but its silicone content is 17%, and hardness is lower, wear resistance is undesirable, and the primary silicon size only refine to about 30 μ m.And for example be published in " JOURAL OF THE JAPANINSTITUTE OF METALS " and P.700-705 mix cast refinement method behind the alloy melting of the article of June 1990＜Refinementof Primary Silicon Crystals in Hypereutectic Al-Si Alloysby the Duplex Casting process＞just introduced two kinds of heterogeneities (32%Si and 12%Si), this method technology is simple, production cost is low, but its primary silicon can only refine to about 40 μ m.And thinning methods such as ultrasonic wave refinement method, stirring refinement method also can only make the primary silicon size refine to about 30 μ m, and need with special device and equipment, the cost height, and the founding complexity is difficult for forming and produces in batches.Though these several thinning methods make mechanical property, resistance to air loss and the erosion resistance of foundry goods increase, but still can not accomplish not have solidification shrinkage, do not satisfy the needs of the scientific and technological cause such as aviation, navigation, space flight of present develop rapidly.
The present inventor entrusts the Scientific and Technical Information Institute, Shaanxi Province to the research of transcocrystallized Al-Si alloy having been carried out looking into newly over past ten years both at home and abroad, and its conclusion is: no solidification shrinkage transcocrystallized Al-Si alloy prescription and founding that this Cha Xinke topic is studied there is no identical report in the pertinent literature at home and abroad.
The present inventor is engaged in the research of aluminum silicon alloy aspect always over past ten years, in order to obtain high strength, wear-resisting, corrosion resistant aluminium-silicon alloy casting, on the basis of original process for refining, adopt compound modifier to combine, succeed by continuous experiment and exploration with special founding.
Purpose of the present invention will provide a kind of volumetric shrinkage that do not take place exactly when solidifying, alloy microscopic structure after solidifying is very tiny, the primary silicon size can refine to 10～15 μ m, the mechanical property of foundry goods, resistance to air loss and erosion resistance improve greatly, save conventional feeding a casting system, economical with materials, the energy and manpower can reduce cost greatly, need not Special Equipment, simple, the easy no solidification shrinkage aluminum silicon alloy and the casting technology thereof of going, being applicable to actual industrial production of technology.
Below in conjunction with accompanying drawing the present invention is elaborated.
Fig. 1 is the microstructure before alloy of the present invention is untreated.
Fig. 2 is the microstructure of alloy of the present invention after founding of the present invention is handled.
The chemical composition of alusil alloy provided by the present invention (wt.%) scope is: Si 23～28 Cu 0.5～1.2 Mg 0.6～1.0 Ni 1.0～2.0 Al are surplus Amount.
Volume contraction does not take place in this alloy when solidifying. The inventor is to the above prescription that provides Aluminium-silicon alloy casting shrinkage factor, fine and close proportion, than having reformed a large amount of experiment and grinding Study carefully work, its result is as follows.
Shrinking percentage 0～-0.14%
Fine and close proportion 2.5751～2.5336
Proportion 2.5694～2.5388
Fine and close proportion: foundry goods proportion with system of risers
Proportion: the foundry goods proportion of no system of risers
This shows that the aluminum silicon alloy of this prescription does not only have volumetric shrinkage when solidifying, small expansion is arranged on the contrary.
General transcocrystallized Al-Si alloy under conventional founding, because of its Tc at interval about 200 ℃, the size of primary silicon and Eutectic Silicon in Al-Si Cast Alloys is very thick in the microstructure behind the alloy graining, its primary silicon is of a size of about 200 μ m.Though aluminum silicon alloy provided by the present invention has been accomplished no solidification shrinkage, but under conventional founding, the size of primary silicon is still very thick in the microstructure behind the alloy graining, see Fig. 1, this just makes the refinement of primary silicon become very difficult, and the processing characteristics of aluminum silicon alloy is directly relevant with the size of primary silicon with mechanical property, and primary silicon is refine to a certain degree, and alloy just has good processing properties and mechanical property.Aluminum silicon alloy provided by the present invention belongs to high-silicon aluminium-silicon alloy, can't reach this point with traditional thinning method at all, must seek a kind of special process treatment process its melting process is controlled, and just can reach the purpose of refinement.
The present invention has adopted special casting technology to the fusing and the cooled and solidified process of the aluminum silicon alloy that provided, and the microstructure of alloy is by refinement greatly after this art breading, and the size of primary silicon only is 10～15 μ m in the microstructure, through T
6After the thermal treatment, mechanical performance index is: σ
b=310.8MPa HB=208.3 δ=3.83%
This shows that after solidifying under the founding provided by the present invention, alloy microscopic structure is very tiny, sees Fig. 2 to the aluminum silicon alloy that provided in the present invention, mechanical property, resistance to air loss and erosion resistance are good.
The special casting technology of no solidification shrinkage aluminum silicon alloy provided by the present invention is the P-Cu+RE composite inoculating, and then it is carried out the temperature difference handle.
The alterant of this alloy is the P-Cu+RE compound modifier, and its add-on (is benchmark with the alloy total amount) is: P-Cu 0.8～1.2% RE 12～18% RE add with the Al-14%RE master alloy for preparing.
Specific practice is as follows:
(1) prepares aluminum silicon alloy provided by the present invention according to aforementioned alloy ratio, put into resistance furnace then and melt, after the fusing, when treating that the alloy liquid temp rises to 750～780 ℃, add admixture refining agent and carry out refining fully.
The composition of admixture refining agent is: C
2Cl
650% KCl, 25% NaCl 25%
(2) add the P-Cu+RE compound modifier in the alloy liquid after refining, be warming up to 820～850 ℃ of insulations about 20 minutes in that the smelting furnace relaying is continuous again, be rapidly heated to about 900 ℃, be poured into temperature then and be in 200～300 ℃ the metallic mould.
(3) alloy after rotten is divided into two portions, put into different resistance furnace refuses respectively, after treating that two stoves melt fully, a stove is warmed up to 650～700 ℃, and this alloy liquid is considered as low-temperature melt, another stove is warmed up to 900～950 ℃, this alloy liquid is considered as high-temperature fusant, then high-temperature fusant is added in the low-temperature melt, behind the uniform mixing, uniform mixed solution is poured into temperature about 750 ℃ be in 200～300 ℃ the metallic mould, can obtain no solidification shrinkage aluminum silicon alloy of the present invention.
The present invention is through a large amount of experimental study and theoretical analysis, thereby adopted the proportioning of science and casting technology to obtain high strength, wear-resisting, corrosion-resistant, the no solidification shrinkage aluminum silicon alloy that do not need system of risers and Special Equipment.Integrate aluminum silicon alloy provided by the present invention and casting technology and have following advantage:
1, volumetric shrinkage does not take place during cooled and solidified, avoided generation because of casting flaws such as shrinkage cavity that volumetric shrinkage causes, shrinkage porosites, so in castings production, can save system of risers (system of risers foundry goods 0.6～3 times) often, this can save material, the energy and manpower greatly, and the castings production cost is reduced significantly.
2, have good processing properties and mechanical property, because its melting process has been carried out the special process processing, the foundry goods microstructure that obtains is very tiny, and the primary silicon size only is 10～15 μ m, so the processing characteristics and the mechanicalness of foundry goods improve greatly, the foundry goods tooling cost reduces greatly.
3, wear-resisting, good corrosion resistance can be used for that needs such as piston, cylinder body are wear-resisting, the foundry goods of good corrosion resistance.
4, founding is simple, need not Special Equipment, and easily behaviour does, and production cost is low, and productivity is increased substantially, and very easily promotes the use of in actual industrial production.
Embodiment:
Get alloy ingredient and be (wt.%): Si 26% Cu 1.0% Mg 0.8% Ni1.5% Al surplus.
The alterant add-on of this alloy (is benchmark with the alloy total amount) is: P-Cu:1.2%RE:15%.
The founding concrete steps of alloy are as follows:
(1) prepares aluminum silicon alloy provided by the present invention according to aforementioned alloy ratio, put into resistance furnace then and melt, after the fusing, when treating that the alloy liquid temp rises to 760 ℃ of left and right sides, add admixture refining agent and carry out refining fully.
The composition of admixture refining agent is: C
2Cl
650% KCl, 25% NaCl 25%
(2) ratio in giving compound modifier add-on adds the P-Cu+RE compound modifier in the alloy liquid after refining, continue at the smelting furnace relaying again and be warming up to about 830 ℃, be incubated about 20 minutes, be rapidly heated to about 900 ℃, be poured into temperature then and be in 200～300 ℃ the metallic mould with standby.
(3) alloy after rotten is divided into two portions, put into different resistance furnace refuses respectively, after treating that two stoves melt fully, a stove is warmed up to about 670 ℃, and this alloy liquid is considered as low-temperature melt, another stove is warmed up to about 930 ℃, this alloy liquid is considered as high-temperature fusant, then high-temperature fusant is added in the low-temperature melt, behind the uniform mixing, uniform mixed solution is poured into temperature about 750 ℃ be in 200～300 ℃ the metallic mould, can obtain no solidification shrinkage aluminum silicon alloy of the present invention.
Claims (3)
1. no solidification shrinkage aluminum silicon alloy, the chemical ingredients (wt%) that it is characterized in that not having the solidification shrinkage aluminum silicon alloy is:
Si：23～28 Cu：0.5～1.2 Mg：0.6～1.0
Ni:1.0～2.0 Al: surplus.
2. casting technology that does not have the solidification shrinkage aluminum silicon alloy, it is characterized in that carrying out the P-Cu+RE composite inoculating by the liquid towards alloy, and then carry out the temperature difference and handle, the alterant of this alloy is the P-Cu+RE compound modifier, and its add-on (is benchmark with the alloy total amount) is: P-Cu:0.8～1.2% RE:12～18%.
3. casting technology according to claim 2 is characterized in that:
Specific practice is as follows:
(1) prepares a certain amount of aluminum silicon alloy by the alloy ratio of claim 1, put into the resistance furnace fusing, after the fusing, treat that alloy temperature rises to 750～780 ℃ fully, add admixture refining agent and carry out refining;
(2) adding the described P-Cu+RE compound modifier of claim 2 in the alloy liquid after refining goes bad to alloy liquid, be warming up to 820～850 ℃ again, be incubated about 20 minutes, be rapidly heated again to about 900 ℃, be cast to temperature then and be in 200～300 ℃ the metallic mould with standby;
(3) alloy after rotten is divided into two portions, put into different resistance furnace refuses respectively, after treating that two stoves melt fully, one stove is warming up to 650～700 ℃, this alloy liquid is considered as the low-temperature melt temperature, another stove is warming up to 900～950 ℃, this alloy liquid is considered as the high-temperature fusant temperature, then high-temperature fusant is poured in the low-temperature melt, after treating uniform mixing, uniform mixing liquid is cast to temperature about 750 ℃ be in 200～300 ℃ the metallic mould, can obtain no solidification shrinkage aluminum silicon alloy of the present invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00113943A CN1122726C (en) | 2000-10-18 | 2000-10-18 | Aluminium-silicon alloy without, solidification shrinking and its casting technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00113943A CN1122726C (en) | 2000-10-18 | 2000-10-18 | Aluminium-silicon alloy without, solidification shrinking and its casting technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1290762A CN1290762A (en) | 2001-04-11 |
| CN1122726C true CN1122726C (en) | 2003-10-01 |
Family
ID=4583676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00113943A Expired - Fee Related CN1122726C (en) | 2000-10-18 | 2000-10-18 | Aluminium-silicon alloy without, solidification shrinking and its casting technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1122726C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880784A (en) * | 2010-07-20 | 2010-11-10 | 上海海事大学 | Method for producing aluminum-silicon alloy |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100449146C (en) * | 2002-11-11 | 2009-01-07 | 宁波欣晖制冷设备有限公司 | Cylinder body of inclined disc type compressor |
| CN101775530B (en) * | 2010-03-04 | 2012-03-28 | 安徽省恒泰动力科技有限公司 | Hypereutectic al-si alloy piston material |
| CN103146963B (en) * | 2013-03-08 | 2015-08-12 | 宁波市煌家铝业有限公司 | Cast aluminium alloy formula and processing technology |
| CN106191552B (en) * | 2016-09-27 | 2018-09-21 | 广州致远新材料科技有限公司 | It is a kind of can anodic oxidation pack alloy preparation method |
| CN108149161A (en) * | 2016-12-05 | 2018-06-12 | 宜兴市零零七机械科技有限公司 | A kind of improved machining center case material |
| CN110093524B (en) * | 2019-05-08 | 2020-05-22 | 上海交通大学 | Alterant for high-silicon aluminum alloy and use method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129743A (en) * | 1994-10-28 | 1996-08-28 | 奔驰公司 | Cylinder liner comprising a supereutectic aluminium/silicon alloy for sealing into a crankcase of a reciprocating piston engine and method of producing such a cylinder liner |
-
2000
- 2000-10-18 CN CN00113943A patent/CN1122726C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1129743A (en) * | 1994-10-28 | 1996-08-28 | 奔驰公司 | Cylinder liner comprising a supereutectic aluminium/silicon alloy for sealing into a crankcase of a reciprocating piston engine and method of producing such a cylinder liner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880784A (en) * | 2010-07-20 | 2010-11-10 | 上海海事大学 | Method for producing aluminum-silicon alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1290762A (en) | 2001-04-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2004260006B2 (en) | Aluminum alloy for engine blocks | |
| CN1643171A (en) | High strength aluminum alloy for high temperature applications | |
| CN1317410C (en) | Abrasion resistant, heat resistant high silicone aluminium alloy and its shaping technology | |
| CN106086538A (en) | High-temperature resistant nano ceramic particle strengthens hypoeutectic al-si alloy and casting method thereof | |
| Gupta et al. | Fabrication of ceramic reinforcement aluminium and its alloys metal matrix composite materials: A review | |
| Lee | Cast aluminum alloy for high temperature applications | |
| CN105886847A (en) | High-temperature-resistant ceramic nanoparticle reinforced aluminum alloy and preparation method and application thereof | |
| CN1122726C (en) | Aluminium-silicon alloy without, solidification shrinking and its casting technology | |
| CN105886853A (en) | Nano ceramic particle reinforced aluminum silicon alloy, preparation method and application thereof | |
| Fraś et al. | Thin wall ductile iron castings as substitutes for aluminium alloy castings | |
| CN111690840B (en) | Amorphous phase silicate particle and SiC particle reinforced aluminum matrix composite material and preparation | |
| Kearney et al. | Aluminum foundry products | |
| Krishna et al. | Research significance, applications and fabrication of hybrid metal matrix composites | |
| CN1718808A (en) | High strength heat resistant alloy | |
| CN109652669A (en) | A kind of micro-nano Mg2Si particle reinforced aluminum alloy powder and preparation method thereof | |
| KR20070008518A (en) | Method for producing metal matrix composite materials | |
| CN114231876B (en) | Aluminum alloy cylinder body with embedded gray cast iron cylinder sleeve for secondary hot dip plating and casting method thereof | |
| CN112453422B (en) | Light Al-Si-Mg2Si electronic packaging material and preparation method and application thereof | |
| CN1256207C (en) | Copper and copper alloy surface casting and penetrating process | |
| JP2753880B2 (en) | Engine components | |
| CN1308142A (en) | Double inoculant for casting high-silicon aluminium-silicon alloy | |
| CN108796316B (en) | Piston made of aluminum-based composite material for heavy-duty diesel engine and preparation method of piston | |
| JP2971380B2 (en) | Method for producing aluminum alloy having high wear resistance | |
| CN116590549A (en) | Method for improving high-temperature strength of aluminum-silicon-magnesium alloy through nickel microalloying | |
| AbdulJabbar et al. | The effects of Heat Treatment (T6) Technique and Some Centrifugal Casting Parameters on the Fatigue behavior of the Composite Material (A380/Al2O3) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |