CN106521256A - Hypereutectic aluminum-silicon alloy and preparation method thereof - Google Patents
Hypereutectic aluminum-silicon alloy and preparation method thereof Download PDFInfo
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- CN106521256A CN106521256A CN201611065847.3A CN201611065847A CN106521256A CN 106521256 A CN106521256 A CN 106521256A CN 201611065847 A CN201611065847 A CN 201611065847A CN 106521256 A CN106521256 A CN 106521256A
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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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper 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
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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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
- C22F1/043—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 silicon as the next major constituent
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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
- C22F1/057—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 copper as the next major constituent
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- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention provides a hypereutectic aluminum-silicon alloy comprising, by mass, 9%-18% of silicon, 6%-12% of copper, 0.4%-1.5% of magnesium and the balance aluminum. The latest deformation processing technique is adopted to process the hypereutectic aluminum-silicon alloy and has the characteristics that the normal temperature and high temperature dimension stability of the alloy is improved significantly by means of a two-stage aging and cycle treatment process; tension resistance strength is bigger than 400 MPa, elongation is bigger than 4%, and hardness HRB is bigger than 78. The hypereutectic aluminum-silicon alloy can be widely applied into parts which have high-strength and abrasion resistance and need high dimensional stability.
Description
Technical field
The invention belongs to metallurgical technology field, and in particular to a kind of high intensity, the hypereutectic aluminium of wear-resisting, high-dimensional stability
Silicon alloy and preparation method thereof.
Background technology
Silicon content is referred to as hypereutectic alloy up to more than 12.7% alusil alloy.Its metallographic is characterized in that in interrupted eutectic matrix
It is dispersed with the nascent silicon crystal grain of various granularities and shape. it is well known that the shape of nascent silicon crystal grain, granularity and distribution are with alloy
Impurity content, condensing rate and selected refining agent (such as P elements) etc. are multifactor and change.Low thermal expansion, intensity/hard
Many advantages, such as Du Bigao, fabulous wear resistance, makes hypereutectic alloy be able to extensively should in engine cylinder-body and piston manufacture
With.
The above-mentioned key property of hypereutectic al-si platform gold, especially fabulous wear resistance, should give the credit to material first
In come into being silicon crystal grain presence.Regrettably, also exactly these crystal grain, form bad shape sometimes in casting process, from
And causing material property unstable, processability is bad, and tool wear is serious.The good characteristic of transcocrystallized Al-Si alloy to be kept, just
Which must be refined using proper method.
Deformation processing technology has advantages below：Category end form or the shaping of nearly end form, are conducive to improving the dimensional accuracy of part；
Die wear mitigates；Deviation and the reduction of air-breathing defect etc., the preparation for being applied to hypereutectic Al-si alloys has its own
Advantage, and the technique also can reduce Si phase sizes to a certain extent.The present invention adopts newest deformation processing technique, significantly carries
The normal temperature and high temperature dimensional stability of high alloy, there is not yet relevant report.
The content of the invention
The purpose of the present invention is providing a kind of transcocrystallized Al-Si alloy.
The present invention transcocrystallized Al-Si alloy calculate by mass percentage by：The silicon of 9-18%, the copper of 6-12%, 0.4-
1.5% magnesium and the aluminium composition of surplus.
The transcocrystallized Al-Si alloy is calculated by mass percentage, and its composition is preferably：The silicon of 12-15%, 8-10%
The aluminium of copper, the magnesium of 0.8-1.1% and surplus.
The transcocrystallized Al-Si alloy tensile strength is more than 400MPa, and elongation percentage is more than 4%, and hardness HRB is more than 78.
Another object of the present invention is to provide a kind of preparation method of transcocrystallized Al-Si alloy, it is characterised in that include
Following steps：
1）Gas atomization prepares the hyper eutectic silicon Al alloy powder：The melting in electric induction furnace by powder stock, melting temperature
Spend for 800-870 DEG C, alloy melt is refined, atomising device is injected after degasification, atomizing medium is nitrogen, argon gas or air, gas
Body pressure is 2-10Mpa, and temperature is 780-850 DEG C, and the mass percent consumption of the powder stock is as follows：Silicon:9-18%,
Copper:6-12%, magnesium:0.4-1.5%, remaining be aluminium；
2）Compacting raw embryo：On a hydraulic press with the pressure forming powder raw embryo of 100-400 Mpa；
3）Jacket is encapsulated：Obtained powder raw embryo is encapsulated with fine aluminium sheet material；
4）The pre-heat treatment：Heat packaged powder raw embryo in heat-treatment furnace, under air atmosphere, heating-up temperature 330-380 DEG C,
Time 1.5-2.5 hour；
5）Hot extrusion：The raw embryo of preheated degasification is taken out from stove, is put in hot extrusion grinding tool rapidly, extrusion molding densification material
Material, 350-400 DEG C of extrusion temperature, lubricant are graphite powder；
6）Material heat treatment：470-520 DEG C of solution treatment 1.5-3 hour, in 50-100 DEG C of hot quenching-in water, at artificial aging
150-220 DEG C of insulation 12-24 hour of reason.
It is an advantage of the current invention that：The normal temperature and high temperature of alloy are significantly improved using two-stage time effect, circulating disposal process
Dimensional stability, the silico-aluminum tensile strength of preparation are more than 400MPa, and elongation percentage is more than 4%, and hardness HRB is more than 78.Can be wide
It is general to be applied to parts that are high-strength, wear-resisting and needing high-dimensional stability.
Specific embodiment
Embodiment 1：
Prepare powder stock：Weigh silicon 14.7kg, copper 7.3kg, magnesium 0.8kg, aluminium 77.2kg.By powder stock in electric induction furnace
Melting, smelting temperature are 850 DEG C, and alloy melt is refined, atomising device is injected after degasification, and atomizing medium is nitrogen, gas pressure
Power is 4.5Mpa, and temperature is 800 DEG C.On a hydraulic press with the pressure forming powder raw embryo of 120Mpa, subsequently by obtained powder
Raw embryo fine aluminium sheet material is encapsulated into row the pre-heat treatment, and treatment conditions are：340 DEG C of heating-up temperature, 2.5 hours time.Into hot extrusion
Pressure ring section, the raw embryo of the pre-heat treatment is taken out from stove, is put in hot extrusion grinding tool rapidly, extrusion molding dense material, extruding
Temperature is 380 DEG C, and lubricant is graphite powder.Material heat treatment is carried out finally：In 495 DEG C of solution treatment 2.5 hours, then at 85 DEG C
Hot quenching-in water, artificial aging process 220 DEG C, insulation complete technological process within 14 hours.
The silico-aluminum tensile strength of preparation is more than 400MPa, and elongation percentage is more than 4%, and hardness HRB is more than 78, at present
Automobile air conditioner compressor key components and parts are had application at present.
Embodiment 2：
Prepare powder stock：Weigh silicon 12.5kg, copper 8.5kg, magnesium 1.2kg, aluminium 77.8kg.By powder stock in electric induction furnace
Melting, smelting temperature are 840 DEG C, and alloy melt is refined, atomising device is injected after degasification, and atomizing medium is nitrogen, gas pressure
Power is 6.5Mpa, and temperature is 820 DEG C.On a hydraulic press with the pressure forming powder raw embryo of 180Mpa, subsequently by obtained powder
Raw embryo fine aluminium sheet material is encapsulated into row the pre-heat treatment, and treatment conditions are：350 DEG C of heating-up temperature, 2.25 hours time.Into hot extrusion
Pressure ring section, the raw embryo of the pre-heat treatment is taken out from stove, is put in hot extrusion grinding tool rapidly, extrusion molding dense material, extruding
Temperature is 360 DEG C, and lubricant is graphite powder.Material heat treatment is carried out finally：In 500 DEG C of solution treatment 2 hours, then at 90 DEG C
Hot quenching-in water, artificial aging process 210 DEG C, and insulation completes technological process in 12 hours.
The silico-aluminum tensile strength of preparation is more than 400MPa, and elongation percentage is more than 4%, and hardness HRB is more than 78, at present
Automobile air conditioner compressor key components and parts are had application at present.
Embodiment 3：
Prepare powder stock：Weigh silicon 14.7kg, copper 9.5kg, magnesium 0.8kg, aluminium 75kg.Powder stock is melted in electric induction furnace
Refining, smelting temperature are 830 DEG C, and alloy melt is refined, atomising device is injected after degasification, and atomizing medium is nitrogen, gas pressure
For 8.5Mpa, temperature is 840 DEG C.On a hydraulic press with the pressure forming powder raw embryo of 220Mpa, subsequently obtained powder is given birth to
Embryo fine aluminium sheet material is encapsulated into row the pre-heat treatment, and treatment conditions are：360 DEG C of heating-up temperature, 1.75 hours time.Into hot extrusion
Link, the raw embryo of the pre-heat treatment is taken out from stove, is put in hot extrusion grinding tool rapidly, extrusion molding dense material, extruding temperature
Spend for 370 DEG C, lubricant is graphite powder.Material heat treatment is carried out finally：In 480 DEG C of solution treatment 2 hours, then in 70 DEG C of heat
Quenching-in water, artificial aging process 180 DEG C, and insulation completes technological process in 8 hours.
The silico-aluminum tensile strength of preparation is more than 400MPa, and elongation percentage is more than 4%, and hardness HRB is more than 78, at present
Automobile air conditioner compressor key components and parts are had application at present.
Claims (4)
1. a kind of transcocrystallized Al-Si alloy, it is characterised in that calculate by mass percentage by：The silicon of 9-18%, the copper of 6-12%,
The aluminium composition of the magnesium and surplus of 0.4-1.5%.
2. a kind of transcocrystallized Al-Si alloy according to claim 1, it is characterised in that calculate by mass percentage by：12-
The aluminium composition of 15% silicon, the copper of 8-10%, the magnesium of 0.8-1.1% and surplus.
3. a kind of transcocrystallized Al-Si alloy according to claim 1, it is characterised in that the transcocrystallized Al-Si alloy tension
Intensity is more than 400MPa, and elongation percentage is more than 4%, and hardness HRB is more than 78.
4. the preparation method of transcocrystallized Al-Si alloy described in a kind of claim 1, it is characterised in that comprise the following steps：
1）Gas atomization prepares the hyper eutectic silicon Al alloy powder：The melting in electric induction furnace by powder stock, melting temperature
Spend for 800-870 DEG C, alloy melt is refined, atomising device is injected after degasification, atomizing medium is nitrogen, argon gas or air, gas
Body pressure is 2-10Mpa, and temperature is 780-850 DEG C, and the mass percent consumption of the powder stock is as follows：Silicon:9-18%,
Copper:6-12%, magnesium:0.4-1.5%, remaining be aluminium；
2）Compacting raw embryo：On a hydraulic press with the pressure forming powder raw embryo of 100-400 Mpa；
3）Jacket is encapsulated：Obtained powder raw embryo is encapsulated with fine aluminium sheet material；
4）The pre-heat treatment：Heat packaged powder raw embryo in heat-treatment furnace, under air atmosphere, heating-up temperature 330-380 DEG C,
Time 1.5-2.5 hour；
5）Hot extrusion：The raw embryo of preheated degasification is taken out from stove, is put in hot extrusion grinding tool rapidly, extrusion molding densification material
Material, 350-400 DEG C of extrusion temperature, lubricant are graphite powder；
6）Material heat treatment：470-520 DEG C of solution treatment 1.5-3 hour, in 50-100 DEG C of hot quenching-in water, at artificial aging
150-220 DEG C of insulation 12-24 hour of reason.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611065847.3A CN106521256A (en) | 2016-11-28 | 2016-11-28 | Hypereutectic aluminum-silicon alloy and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611065847.3A CN106521256A (en) | 2016-11-28 | 2016-11-28 | Hypereutectic aluminum-silicon alloy and preparation method thereof |
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| CN106521256A true CN106521256A (en) | 2017-03-22 |
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| CN201611065847.3A Pending CN106521256A (en) | 2016-11-28 | 2016-11-28 | Hypereutectic aluminum-silicon alloy and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774990A (en) * | 2017-10-27 | 2018-03-09 | 天津百恩威新材料科技有限公司 | Carborundum hyper eutectic silicon Al alloy composite powder, preparation method and product |
| CN110193597A (en) * | 2018-02-26 | 2019-09-03 | 通用汽车环球科技运作有限责任公司 | Manufacture crystalline aluminium-iron-silicon alloy method |
| CN118441183A (en) * | 2024-07-08 | 2024-08-06 | 泰州市金鹰精密铸造有限公司 | Hypereutectic aluminum-silicon alloy with high wear resistance and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60204854A (en) * | 1984-03-29 | 1985-10-16 | Showa Alum Corp | Aluminum alloy pulley |
| JPS6148555A (en) * | 1984-08-15 | 1986-03-10 | Showa Alum Corp | Extruded aluminum alloy material having superior wear resistance |
| CN1334354A (en) * | 2001-08-09 | 2002-02-06 | 华南理工大学 | Hyper-eutectic Al-Si alloy material for powder metallurgy and its preparing process |
| US20130186525A1 (en) * | 2010-02-11 | 2013-07-25 | Trimet Aluminium Ag | Method and device for producing motor vehicle chassis parts |
| CN103614595A (en) * | 2013-12-09 | 2014-03-05 | 西南铝业（集团）有限责任公司 | High-silicon and high-copper aluminum alloy and preparation method thereof |
| CN104762535A (en) * | 2014-01-02 | 2015-07-08 | 北京有色金属研究总院 | Hypereutectic aluminium-silicon alloy billet used for automobile air-conditioning compressor rotors, and preparation method thereof |
-
2016
- 2016-11-28 CN CN201611065847.3A patent/CN106521256A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60204854A (en) * | 1984-03-29 | 1985-10-16 | Showa Alum Corp | Aluminum alloy pulley |
| JPS6148555A (en) * | 1984-08-15 | 1986-03-10 | Showa Alum Corp | Extruded aluminum alloy material having superior wear resistance |
| CN1334354A (en) * | 2001-08-09 | 2002-02-06 | 华南理工大学 | Hyper-eutectic Al-Si alloy material for powder metallurgy and its preparing process |
| US20130186525A1 (en) * | 2010-02-11 | 2013-07-25 | Trimet Aluminium Ag | Method and device for producing motor vehicle chassis parts |
| CN103614595A (en) * | 2013-12-09 | 2014-03-05 | 西南铝业（集团）有限责任公司 | High-silicon and high-copper aluminum alloy and preparation method thereof |
| CN104762535A (en) * | 2014-01-02 | 2015-07-08 | 北京有色金属研究总院 | Hypereutectic aluminium-silicon alloy billet used for automobile air-conditioning compressor rotors, and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774990A (en) * | 2017-10-27 | 2018-03-09 | 天津百恩威新材料科技有限公司 | Carborundum hyper eutectic silicon Al alloy composite powder, preparation method and product |
| CN110193597A (en) * | 2018-02-26 | 2019-09-03 | 通用汽车环球科技运作有限责任公司 | Manufacture crystalline aluminium-iron-silicon alloy method |
| CN118441183A (en) * | 2024-07-08 | 2024-08-06 | 泰州市金鹰精密铸造有限公司 | Hypereutectic aluminum-silicon alloy with high wear resistance and preparation method and application thereof |
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Application publication date: 20170322 |