CN110218915B - AlSi20Fe5Ni2Method for producing a blank - Google Patents
AlSi20Fe5Ni2Method for producing a blank Download PDFInfo
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- CN110218915B CN110218915B CN201910604722.0A CN201910604722A CN110218915B CN 110218915 B CN110218915 B CN 110218915B CN 201910604722 A CN201910604722 A CN 201910604722A CN 110218915 B CN110218915 B CN 110218915B
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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
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
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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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Abstract
The invention provides AlSi20Fe5Ni2The preparation method of the aluminum alloy blank comprises the following steps: according to the mass percentage, preparing raw materials of pure aluminum, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy and aluminum-nickel intermediate alloy according to the proportion of Al, Si, Fe and Ni being 73:20:5: 2; smelting the raw materials in a medium-frequency induction furnace, and standing for 20-30min after the raw materials are molten to obtain a melt; deslagging and degassing the melt; pouring the melt after deslagging and degassing into a tundish, standing, and preparing AlSi by spray forming20Fe5Ni2Ingot blank and residual AlSi produced20Fe5Ni2And (3) alloying powder. Reduce energy consumption, reduce environmental pollution and reduce production cost. The raw materials of the common powder metallurgy are mostly formed by mixing several kinds of elemental element powder, the risk of uneven mixing exists, the alloy powder with even components can be prepared by adopting the spray forming technology, and the proportion of the components of the raw materials is not needed.
Description
Technical Field
The invention belongs to the field of aluminum alloy preparation processes, and particularly relates to AlSi20Fe5Ni2A method for preparing a blank.
Background
In recent years, due to the increasingly prominent energy and environmental problems, light weight has been the main development trend in the fields of automobiles, air-conditioning compressors and the like, and the light weight, the high specific strength, the wear resistance and the corrosion resistance of aluminum alloy materials provide industrial prospects. The high-silicon wear-resistant heat-resistant aluminum alloy has the characteristics of low density, low thermal expansion coefficient, high strength, high wear resistance, high thermal conductivity and the like, can be used for preparing parts such as belt wheels, bearings, cylinder sleeves, sliding sheets, rotors and the like, can obviously improve the performance of equipment, prolongs the service life, can reduce energy consumption, and has obvious environmental effect. The aluminum-silicon alloy prepared by the traditional casting method has the problems of serious macrosegregation, thick structure, low tensile strength and the like, and can not meet the high-performance index requirement of the product.
The spray forming technology is used as a new generation of solidification technology, a solidification unit is improved from a centimeter level to a micron level, the solidification rate can be greatly improved, and the spray forming technology is a subversive technology for alloy material production. The material prepared by the spray forming technology has the advantages of no macrosegregation, low residual stress, fine and dispersed structure, high density and the like, and can obviously improve the processing and mechanical properties of the material. But in the process of preparing the high-silicon wear-resistant and heat-resistant aluminum alloy ingot blank material by spray forming, a large amount of alloy powder products with the size in the range of 10-80 mu m can be prepared. The powder has a large particle size distribution range, and a layer of compact oxide film is arranged on the surface of the powder, so that the powder is difficult to utilize. If the powder material is not effectively utilized, the cost of injection molding blank making is directly increased, and resources are wasted. With the rapid development of the spray forming industry in recent years, the industry scale is getting bigger and bigger, and the yield of powder is inevitably increased continuously, so that a new process is urgently needed to reasonably utilize the powder generated in the spray forming process and meet the requirements of energy conservation, emission reduction and cost reduction.
Disclosure of Invention
In order to solve the technical problem, the invention provides AlSi20Fe5Ni2A method for preparing a blank. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
The invention adopts the following technical scheme:
in some alternative embodiments, an AlSi20Fe5Ni2The preparation method of the blank comprises the following steps:
s1: according to the mass percentage, preparing raw materials of pure aluminum, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy and aluminum-nickel intermediate alloy according to the proportion of Al, Si, Fe and Ni being 73:20:5: 2;
s2: smelting the raw materials in a medium-frequency induction furnace, and standing for 20-30min after the raw materials are molten to obtain a melt;
s3: deslagging and degassing the melt;
s4: pouring the melt after deslagging and degassing into a tundish, standing, and preparing AlSi by spray forming20Fe5Ni2Ingot blank and AlSi production20Fe5Ni2And (3) powder.
Wherein, in the step S2, the melting temperature is 800-950 ℃.
In step S4, the injection molding parameters are: the oblique spray angle of the nozzle is 30-40 ℃, the atomization temperature is 800-1000 ℃, and the atomization pressure is 0.5-0.9 MPa.
In step S4, the atomizing gas and the shielding gas are nitrogen.
Wherein, still include the following step:
s5: collecting AlSi20Fe5Ni2Powder;
s6: under the protection of nitrogen, adopting an explosion-proof sieving machine to carry out AlSi treatment20Fe5Ni2Sieving the powder, wherein the explosion-proof sieving machine is a 180-mesh sieve;
s7: mixing AlSi20Fe5Ni2In the powder sheath, the wall thickness of the sheath is 2-4mm, and the sheath is degassed to form a sheath blank;
s8: the prepared sheath blank is put into a hot isostatic pressing device for hot isostatic pressing to obtain AlSi20Fe5Ni2Hot isostatic pressing the blank; the pressure transmission medium is argon;
s9: removal of AlSi by turning20Fe5Ni2And hot isostatic pressing the sheath on the surface of the blank.
Wherein, in the step S8, the temperature for degassing the sheath is 300-500 ℃, a vacuum pump is used for degassing for 12-20h, and when the vacuum degree in the sheath reaches 10-2-10-3When Pa is needed, welding the gas outlet of the sheath to complete degassing of the sheath。
Wherein the hot isostatic pressing parameters are as follows: the pressing temperature is 430-500 ℃, the pressure is 150-200MPa, the pressure maintaining time is 2-4h, the heating rate is 10 ℃/s, the pressure increasing rate is 1MPa/s, the furnace is cooled to 200-300 ℃ after the pressing is finished, then the furnace is taken out, and the air cooling is carried out to the room temperature.
The invention has the following beneficial effects: reduce energy consumption, reduce environmental pollution and reduce production cost. The raw materials of the common powder metallurgy are mostly formed by mixing several kinds of elemental element powder, the risk of uneven mixing exists, the alloy powder with even components can be prepared by adopting the spray forming technology, and the proportion of the components of the raw materials is not needed.
For the purposes of the foregoing and related ends, the one or more embodiments include the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative aspects and are indicative of but a few of the various ways in which the principles of the various embodiments may be employed. Other benefits and novel features will become apparent from the following detailed description when considered in conjunction with the drawings and the disclosed embodiments are intended to include all such aspects and their equivalents.
Drawings
FIG. 1 shows AlSi20Fe5Ni2And (5) metallography.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims.
S1: according to the mass percentage, preparing raw materials of pure aluminum, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy and aluminum-nickel intermediate alloy according to the proportion of Al, Si, Fe and Ni being 73:20:5: 2; the raw materials comprise industrial pure aluminum, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy and aluminum-nickel intermediate alloy.
S2: smelting the raw materials in a medium-frequency induction furnace, and standing for 20-30min after the raw materials are molten to obtain a melt; the smelting temperature is 800-950 ℃.
S3: deslagging and degassing the melt;
s4: pouring the melt after deslagging and degassing into a tundish, standing, and preparing AlSi by spray forming20Fe5Ni2Ingot blank and AlSi production20Fe5Ni2And (3) powder. The spray forming parameters are as follows: the oblique spray angle of the nozzle is 30-40 ℃, the atomization temperature is 800-1000 ℃, and the atomization pressure is 0.5-0.9 MPa. The atomizing gas and the shielding gas are nitrogen
S5: collecting AlSi20Fe5Ni2Powder;
s6: under the protection of nitrogen, adopting an explosion-proof sieving machine to carry out AlSi treatment20Fe5Ni2Sieving the powder, wherein the explosion-proof sieving machine is a 180-mesh sieve;
s7: mixing AlSi20Fe5Ni2In the powder sheath, the wall thickness of the sheath is 2-4mm, and the sheath is degassed to form a sheath blank;
s8: the prepared sheath blank is put into a hot isostatic pressing device for hot isostatic pressing to obtain AlSi20Fe5Ni2Hot isostatic pressing the blank; the pressure transmission medium is argon; the temperature for degassing the sheath is 300-500 ℃, a vacuum pump is used for degassing for 12-20h, and when the vacuum degree in the sheath reaches 10-2-10-3And when Pa is needed, welding the sheath degassing port to complete sheath degassing.
Wherein the hot isostatic pressing parameters are as follows: the pressing temperature is 430-500 ℃, the pressure is 150-200MPa, the pressure maintaining time is 2-4h, the heating rate is 10 ℃/s, the pressure increasing rate is 1MPa/s, the furnace is cooled to 200-300 ℃ after the pressing is finished, then the furnace is taken out, and the air cooling is carried out to the room temperature.
S9: removal of AlSi by turning20Fe5Ni2And hot isostatic pressing the sheath on the surface of the blank.
As shown in FIG. 1, AlSi is the product prepared by the method20Fe5Ni2Metallographic pictures of (a).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. AlSi20Fe5Ni2The preparation method of the blank is characterized by comprising the following steps:
s1: according to the mass percentage, preparing raw materials of pure aluminum, aluminum-silicon intermediate alloy, aluminum-iron intermediate alloy and aluminum-nickel intermediate alloy according to the proportion of Al, Si, Fe and Ni being 73:20:5: 2;
s2: smelting the raw materials in a medium-frequency induction furnace, and standing for 20-30min after the raw materials are molten to obtain a melt;
s3: deslagging and degassing the melt;
s4: pouring the melt after deslagging and degassing into a tundish, standing, and preparing AlSi by spray forming20Fe5Ni2Ingot blank and residual AlSi produced20Fe5Ni2Alloying powder;
s5: collecting AlSi20Fe5Ni2Powder;
s6: under the protection of nitrogen, adopting an explosion-proof sieving machine to carry out AlSi treatment20Fe5Ni2Sieving the powder, wherein the explosion-proof sieving machine is a 180-mesh sieve;
s7: mixing AlSi20Fe5Ni2In the powder sheath, the wall thickness of the sheath is 2-4mm, degassing the sheath to form a sheath blank;
s8: putting the prepared package blank into a hot isostatic pressing device for hot isostatic pressing to obtain AlSi20Fe5Ni2Hot isostatic pressing the blank; the pressure transmission medium is argon; the temperature for degassing the sheath is 300-500 ℃, a vacuum pump is used for degassing for 12-20h, and when the vacuum degree in the sheath reaches 10-2-10-3When Pa is needed, welding a sheath degassing port to complete sheath degassing;
s9: removal of AlSi by turning20Fe5Ni2A sheath on the surface of the hot isostatic pressing blank;
wherein the hot isostatic pressing parameters are as follows: the pressing temperature is 430-500 ℃, the pressure is 150-200MPa, the pressure maintaining time is 2-4h, the heating rate is 10 ℃/s, the pressure increasing rate is 1MPa/s, the furnace is cooled to 200-300 ℃ after the pressing is finished, then the furnace is taken out, and the air cooling is carried out to the room temperature.
2. An AlSi according to claim 120Fe5Ni2The preparation method of the blank is characterized in that in the step S2, the smelting temperature is 800-950 ℃.
3. An AlSi according to claim 220Fe5Ni2The method for preparing the blank is characterized in that in the step S4, the spray forming parameters are as follows: the oblique spray angle of the nozzle is 30-40 ℃, the atomization temperature is 800-1000 ℃, and the atomization pressure is 0.5-0.9 MPa.
4. An AlSi according to claim 320Fe5Ni2The method for preparing the blank is characterized in that in the step S4, the atomizing gas and the protective gas are nitrogen.
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| EP0568705B1 (en) * | 1991-11-22 | 1998-05-13 | Sumitomo Electric Industries, Ltd. | Method for degassing and solidifying aluminum alloy powder |
| US5597967A (en) * | 1994-06-27 | 1997-01-28 | General Electric Company | Aluminum-silicon alloy foils |
| CN1184339C (en) * | 2000-09-27 | 2005-01-12 | 北京科技大学 | Method for spraying and depositing high silicon aluminium alloy |
| JP2005272934A (en) * | 2004-03-24 | 2005-10-06 | Yoshinari Yokoo | Method for manufacturing metal member using fine atomized metal powder, and metal member using fine atomized metal powder |
| CN101457318B (en) * | 2008-12-20 | 2010-11-24 | 中国兵器工业第五二研究所 | High-silicon aluminum alloy cylinder sleeve material and preparation method thereof |
| CN102615257B (en) * | 2012-04-25 | 2013-11-13 | 东北大学 | Method for refining and spheroidizing metal or alloy |
| CN103045920B (en) * | 2012-12-21 | 2014-10-29 | 中国兵器工业第五二研究所 | High-silicon aluminum alloy cylinder sleeve material and fabrication method thereof |
| CN105220093A (en) * | 2014-05-28 | 2016-01-06 | 北京有色金属研究总院 | A kind of densification method for reaction-injection moulding ultrahigh-strength aluminum alloy material |
| CN106735225B (en) * | 2016-12-26 | 2018-08-28 | 天津百恩威新材料科技有限公司 | A method of being injected into shape forging aluminium alloy brake disc brake drum |
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