CN1238543C - Process for preparing alloy block from powdered Zn and Al - Google Patents
Process for preparing alloy block from powdered Zn and Al Download PDFInfo
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- CN1238543C CN1238543C CN 02136117 CN02136117A CN1238543C CN 1238543 C CN1238543 C CN 1238543C CN 02136117 CN02136117 CN 02136117 CN 02136117 A CN02136117 A CN 02136117A CN 1238543 C CN1238543 C CN 1238543C
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Abstract
The present invention relates to a process for preparing an alloy block material from powdered zinc and aluminum. In the present invention, on the basis of a zinc aluminium alloy prepared by a traditional casting method, a microcrystalline brittle alloy belt is prepared by adopting a single-roller quick cooling method, the alloy belt is ground into powders, and then, the powders are loaded into a mould, sintered by warm pressing, and finally demoulded so as to obtain the alloy block material. The method of the present invention greatly improves the uniformity of the density and hardness of the alloy material, and the plasticity and dry lubricating property of the material, so that the application area of the material can be widened.
Description
Technical field
The invention belongs to the metal material processing technical field, particularly a kind of preparation method of alloy block from powdered Zn and Al.
Background technology
Traditional aluminium zinc generally adopts the metal pattern casting process, and its gordian technique is a designing mould, and purpose is to improve speed of cooling.In process of cooling, there is Peritectic Reaction in the crystal grain, atomic motion has caused the ununiformity of composition to be diffused as the master; Simultaneously, the grain boundary is hard and crisp, though played the effect of strengthening crystal boundary, plasticity is relatively poor.
Content when sending out
The object of the present invention is to provide a kind of ununiformity that can significantly reduce material hardness and density, improve the preparation method of the powder aluminium alloy material of material plasticity and wear resisting property, make the aluminium zinc block of material have good dry lubricating performance, enlarge the range of application and the value-added content of product of rear earth zinc-aluminium alloy material.
The preparation method of the alloy block from powdered Zn and Al that the present invention proposes is to use single roller quench to make the amorphous fragile alloy band after traditional teeming practice makes ZnAl alloy ingot; By ball mill the alloy band is polished into powder again, adorns mould then and carry out the temperature and pressure sintering; Finally demould obtains finished product.
The novel powder aluminium zinc block of material preparation method that the present invention proposes, broken through the production technique of existing aluminium alloy material, it is on the basis of traditional casting process, made full use of single roller chilling technique and temperature and pressure sintering technology, the homogeneity of the density and hardness of material, the plasticity and the dry lubricating performance of material are all improved a lot.The variation of production technique causes the performance of material also to improve a lot thereupon, thereby has expanded the Application Areas of aluminium alloy material, and has brought very big economical effectiveness to society.
Technical process of the present invention as shown in Figure 1, concrete steps comprise the molten alloy ingot, spray alloy band, powder processing, temperature and pressure sintering etc.:
1, adopts traditional teeming practice melting ZnAl alloy ingot: utilize crucible electrical resistance furnace fusing zinc ingot metal, aluminium ingot, temperature of fusion is 800 ℃ ± 50 ℃, the master alloy that adds strengthening elements such as cupric and rare earth after zinc ingot metal, the aluminium ingot fusing again, after insulation is handled, again through slagging-off, refining, get alloy pig: wherein, rare earth is for containing the mishmetal of lanthanum (La), cerium (Ce), strengthening element also comprises chromium (Cr), nickel (Ni), magnesium (Mg), titanium (Ti), boron (B), silicon (Si) etc., the 4-7wt% that accounts for total alloy pig of master alloy.
2, spray the alloy band: alloy pig is put into single roller quenching apparatus, fusion under shielding gas, shielding gas is a rare gas element, generally can adopt nitrogen, melt temperature is 850 ℃ ± 50 ℃, is injected into the crystallite band then, its thickness is the 16-20 micron, width 15-25 millimeter;
3, powder processing: amorphous ribbon is put into ball mill, grind to form powdered alloy, the order number is 100-180;
4, temperature and pressure sintering: with the powdered alloy mould of packing into; be heated to 145 ℃-150 ℃, compression moulding, pressure is 100-500MPa; carry out normal sintering again; sintering temperature is 500 ℃-600 ℃, the temperature difference is controlled at ± 2.5 ℃ in, sintering time is 1 hour-2 hours; sintering pressure is 20MPa-30MPa; carry out under shielding gas, shielding gas is a rare gas element, generally adopts nitrogen.
5, finally demould obtains finished product.
Single roller chilling technique that the present invention adopts is that molten metal liquid is injected on the good cooling roll surface of heat conduction, forms liquid thin layer, dispels the heat rapidly by the heat conduction of roll surface and this thin layer, can produce near 10
6K/S or higher speed of cooling.High like this speed of cooling, it mainly acts on is motion and the diffusion that suppresses atom in the material, makes atom can not occupy the balance lattice point, and melt obtained bigger condensate depression (a few Baidu) before forming a large amount of solid phase particles, and then the weave construction of change material, form non-equilibrium crystal.Accompanying drawing 2 has provided and has utilized single roller chilling technique to prepare the device of microcrystallizing alloy strip, and the nozzle of device below fusion crucible, crucible and the cooling roller of the high speed rotating below the nozzle constitute.The alloy material that is used for preparing the crystallite strip is placed on crucible, is inlet mouth on the crucible, after alloy melting is good, gas is pressed into crucible, makes alloy liquid be ejected into the surface of roller.Because the roller high speed rotating, high temperature melt alloy is run into to solidify immediately on the roll surface and be attached to the surface and is gone up rotation, outwards flies to because centrifugation makes the strip that has solidified break away from roll surface.Can spray the width and the thickness of the speed adjustment strip of liquid alloy speed and cooling roller by control.The crystallite strip that obtains is a fragility, is easy to make powder.
The present invention adopts the temperature and pressure sintering technology, be once suppress, once sintered, be an economically viable new technology of making the high-strength powder metallurgical part.The temperature and pressure sintering technology is different with hot pressing, and hot pressing is meant die mould under the high temperature usually, and sintering under the pressure is characterized in the high-temperature low-pressure sintering.The characteristics of the temperature and pressure sintering technology that the present invention adopts are the cryogenic high pressure die moulds, and sintering its objective is by the high pressure die mould then, and material structure is evenly distributed, and increase the plasticity of finished product.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Fig. 2 is the single roller quenching apparatus diagram among the present invention.
Number in the figure: 1 is crucible, and 2 is molten metal, and 3 is nozzle, and 4 is cooling roller, and 5 is the alloy band.
Embodiment
Further specifically describe the present invention below by embodiment.
Embodiment is shown in technical process Fig. 1.Be prepared into ZnAl alloy ingot by common teeming practice.According to the block of material performance demands, select different processing parameters.Shielding gas adopts N in the preparation of crystallite band
2, the alloy bandwidth is 20 microns, thick is 20 millimeters.In the temperature and pressure sintering process, protective atmosphere is N
2, its pressure is 0.114MPa, 560 ℃ of sintering temperatures, sintering time 1 hour, sintering pressure 26MPa.The alloy block from powdered Zn and Al that makes is a plastic material, and structural constituent is even, and its density is 3.712g/cm3, and porosity is 0.70%, Vickers' hardness Hv=110.
Claims (2)
1, a kind of preparation method of alloy block from powdered Zn and Al is characterized in that:
(1) adopt traditional teeming practice melting ZnAl alloy ingot: utilize crucible electrical resistance furnace to melt zinc ingot metal, aluminium ingot, temperature of fusion is 800 ℃ ± 50 ℃, adds the master alloy of strengthening elements such as cupric and rare earth, after insulation is handled, again through slagging-off, refining, gets alloy pig; Wherein, rare earth is the mishmetal of lanthanum, cerium, and strengthening element also has chromium, nickel, magnesium, titanium, boron or silicon, and master alloy accounts for the 4-7wt% of total alloy pig;
(2) spray the alloy band: alloy pig is put into single roller quenching apparatus, fusion under shielding gas, melt temperature is 850 ℃ ± 50 ℃, is injected into the microcrystallizing alloy band then, its thickness is the 16-20 micron, width 15-25 millimeter;
(3) powder processing: the alloy band is put into ball mill, grind to form powdered alloy, the order number is 100-180;
(4) temperature and pressure sintering: with the powdered alloy mould of packing into, be heated to 145 ℃-150 ℃, compression moulding, pressure is 100-500MPa, carries out normal sintering again, and sintering temperature is 500 ℃-600 ℃, the temperature difference is controlled at ± 2.5 ℃ in, sintering time is 1 hour-2 hours, and sintering pressure is 20MPa-30MPa, carries out under shielding gas;
(5) finally demould obtains finished product.
2, preparation method according to claim 1 when it is characterized in that preparing the alloy band, is that melt alloy liquid is injected on the good cooling roll surface of heat conductivility, forms the liquid thin layer, dispels the heat rapidly by the heat conduction of roll surface and this thin layer; The speed by control jetting fluid alloy and the rotating speed of cooling roller are regulated the width and the thickness of alloy band.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136117 CN1238543C (en) | 2002-07-19 | 2002-07-19 | Process for preparing alloy block from powdered Zn and Al |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136117 CN1238543C (en) | 2002-07-19 | 2002-07-19 | Process for preparing alloy block from powdered Zn and Al |
Publications (2)
| Publication Number | Publication Date |
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| CN1390964A CN1390964A (en) | 2003-01-15 |
| CN1238543C true CN1238543C (en) | 2006-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02136117 Expired - Fee Related CN1238543C (en) | 2002-07-19 | 2002-07-19 | Process for preparing alloy block from powdered Zn and Al |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081064A1 (en) | 2009-01-12 | 2010-07-15 | E. I. Du Pont De Nemours And Company | Process for preparing znal target |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277517A (en) * | 2011-05-26 | 2011-12-14 | 中南大学 | High-strength weldable zinc alloy and process for preparing pipe of high-strength weldable zinc alloy through continuous extrusion |
| JP2014133921A (en) * | 2013-01-10 | 2014-07-24 | Panasonic Corp | Method of manufacturing zinc alloy powder for alkaline battery |
| CN108418320B (en) * | 2016-07-30 | 2019-12-31 | 佛山市顺德区恒德电机制品有限公司 | Driving motor |
| CN106166616A (en) * | 2016-09-29 | 2016-11-30 | 柳州增程材料科技有限公司 | A kind of preparation method of 3D printing metal dust |
| CN106216698A (en) * | 2016-09-29 | 2016-12-14 | 柳州增程材料科技有限公司 | A kind of preparation technology of 3D printing alloy powder |
| CN106216700A (en) * | 2016-09-30 | 2016-12-14 | 柳州增程材料科技有限公司 | A kind of preparation technology of change speed gear box al-mg alloy powder |
| CN115343275A (en) * | 2022-08-02 | 2022-11-15 | 苏州市祥冠合金研究院有限公司 | YZZnAl 4 Cu 1 Preparation method of spectral standard sample |
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2002
- 2002-07-19 CN CN 02136117 patent/CN1238543C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081064A1 (en) | 2009-01-12 | 2010-07-15 | E. I. Du Pont De Nemours And Company | Process for preparing znal target |
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| CN1390964A (en) | 2003-01-15 |
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Granted publication date: 20060125 Termination date: 20120719 |