CN101302587A - Method for refining and sphericizing silicon-phase structure in aluminum silicon alloy - Google Patents
Method for refining and sphericizing silicon-phase structure in aluminum silicon alloy Download PDFInfo
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- CN101302587A CN101302587A CNA2008100585838A CN200810058583A CN101302587A CN 101302587 A CN101302587 A CN 101302587A CN A2008100585838 A CNA2008100585838 A CN A2008100585838A CN 200810058583 A CN200810058583 A CN 200810058583A CN 101302587 A CN101302587 A CN 101302587A
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- silicon alloy
- nodularization
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 229910000676 Si alloy Inorganic materials 0.000 title claims description 38
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims description 36
- 238000007670 refining Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 35
- 229910052710 silicon Inorganic materials 0.000 claims description 66
- 239000010703 silicon Substances 0.000 claims description 63
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 62
- 239000000956 alloy Substances 0.000 claims description 41
- 238000012545 processing Methods 0.000 claims description 14
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 38
- 239000002245 particle Substances 0.000 abstract description 8
- 238000005266 casting Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 abstract description 3
- KMWBBMXGHHLDKL-UHFFFAOYSA-N [AlH3].[Si] Chemical compound [AlH3].[Si] KMWBBMXGHHLDKL-UHFFFAOYSA-N 0.000 abstract 6
- 239000002210 silicon-based material Substances 0.000 abstract 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 31
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000007787 solid Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000005496 eutectics Effects 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 229910018125 Al-Si Inorganic materials 0.000 description 6
- 229910018520 Al—Si Inorganic materials 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000003801 milling Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007712 rapid solidification Methods 0.000 description 2
- 238000010107 reaction injection moulding Methods 0.000 description 2
- 239000011856 silicon-based particle Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 241001466077 Salina Species 0.000 description 1
- 229910000551 Silumin Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000018984 mastication Effects 0.000 description 1
- 238000010077 mastication Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The invention provides a method for thinning and spheroidizing a silicon-phase structure in aluminium silicon. The invention is characterized in that the method comprises the following steps of: A. insulating a casting aluminium silicon material at a temperature of between 200 DEG C and smelting point temperature; B. screwing a screw pin with a rotating shaft on the upper part into the aluminium silicon material at a speed of between 1 and 3000 revolutions per minute; rotating and moving the pin and the rotating shaft forwards from one end of the aluminium silicon to the other end of the aluminium silicon at a rotating speed of between 1 and 3000 revolutions per minute and a moving speed of between 0 and 10000 meters per minute when the pin completely enters the material, after the lower end plane of the rotating shaft is contacted with the surface of the aluminium silicon, thereby completing the treatment of a pass. Therefore, the thinned and spheriodized silicon-phase structure can be acquired in the treatment area of the pass, and the silicon-phase particle is thinned to be less than or equal to 10 micrometer, which can not be achieved by the prior modification and other technologys. The method can greatly improve the mechanical property of the material, so that the material has excellent plasticity and toughness, and has higher endurance strength; moreover, the method has the advantages of simple process, short flow and so on, and has better application prospect.
Description
Technical field
The present invention relates to a kind of method, the method for silicon phase constitution in especially a kind of while refinement and the nodularization aluminum silicon alloy belongs to metallic substance modification processing technique field.
Background technology
Usually there are needle-like Eutectic Silicon in Al-Si Cast Alloys phase, thick en plaque primary silicon particle in the microtexture of cast Al-Si alloy.The source region of crackle when they become material failure usually makes plasticity, toughness and the fatigue strength of material lower.Making refinement of silicon phase and nodularization, is the major issue of studying at aluminum silicon alloy for a long time.
Aluminum silicon alloy is one of most important aluminium base structured material, is main casting alloy system.Except having the characteristics that general aluminium alloy proportion is low, heat transfer is good, can also regard a kind of in-situ composite as than the aluminum silicon alloy of high silicon content, higher room temperature comprehensive mechanical property (intensity, wear resistance, unit elongation) and high-temperature behavior are arranged, processability might as well; Because the mutual solid solubility of aluminium, element silicon is lower,, be a kind of green material simultaneously with Sustainable development so recycle conveniently.So it is at the application in fields such as automobile, aerospace, electronics more and more widely [1-3].
The main weak point of cast Al-Si alloy is to have needle-like Eutectic Silicon in Al-Si Cast Alloys phase, thick en plaque primary silicon particle in its microtexture usually.Matter is crisp, frangible on the one hand for they, and its wedge angle can cause stress concentration simultaneously, and so the source region of crackle when becoming material failure usually is the plasticity of material, toughness and fatigue strength lower [3].High silicon content (〉=eutectic composition point 11.8%) aluminium alloy exists in a large number owing to the primary silicon particulate, and is especially big to the above-mentioned Effect on Performance of material.So, solve the anomalad of silicon phase constitution, make refinement of silicon phase and nodularization, be for a long time at the major issue of aluminum silicon alloy.
At present to aluminum silicon alloy silicon carry out mutually refinement and (or) technology of nodularization can be divided into liquid state, semi-solid state and three big classes of solid state technology.Wherein, rotten handle [4], rapid solidification [5], reaction-injection moulding [6,7] etc. technology belongs to liquid technology, nodularization thermal treatment (SST) [8,9], rolling [10], violent viscous deformation (SPD) [11] etc. belong to solid state technology, and semi-soild-state technology comprises the technology [12-17] of preparation semi solid slurries such as various stirrings, vibration.
In liquid technology, rotten is a kind of commonly used and easy technology, and the influence of silicon forming core and process of growth being carried out by various alterants is to change silicon phase particulate size and form.Wherein, alterant is only effective respectively to primary silicon (as P) and Eutectic Silicon in Al-Si Cast Alloys (as Na, Sr etc.) usually; Be merely able to make silicon phase grain refine to 20～50 mu m ranges at present, relatively poor at silicone content above effect under 30% situation.And alterant is not remarkable to the effect of silicon phase nodularization, can only obtain polygon-shaped silicon phase basically.Other liquid technology such as rapid solidifications, reaction-injection moulding etc. then cost are higher, are more suitable for low dimension material produce.
Semi-soild-state technology [12-17] mainly utilizes various stirrings or Quench method to make in the semi solid slurry silicon that fracture or a large amount of forming cores etc. take place mutually, and controls the growth of solid phase particles by the homogenizing in liquid composition field and temperature field, thereby realizes the refinement of silicon phase.Generally can only make primary silicon refine to 30～50 micrometer ranges, relatively poor at silicone content above effect under 30% situation.Silicon phase particle is realized nodularization [12] by assembling with mutual friction mutually usually, thereby causes thick.So, in semi-soild-state technology, also be difficult for realizing refinement simultaneously of silicon phase particulate and nodularization.Simultaneously, also make silicon occur segregation mutually easily.
Solid state technology generally comes shearing-crushing silicon phase by the viscous deformation of matrix, and along with the viscous deformation degree increases, silicon phase degree of refinement also increases, and thinning effect is better than liquid state and semi-soild-state technology usually.For example the equal channel angular extrusion technique in the SPD technology can make the refinement of silicon phase reach hundreds of nanometer [11].But they can not make silicon obtain nodularization mutually.
The SST technology is one special in the solid state technology, its by element silicon in aluminium diffusion, solid solution and separate out again, realize the nodularization and the refinement of silicon phase, but only Eutectic Silicon in Al-Si Cast Alloys worked substantially, to the primary silicon DeGrain.
In recent years, the appearance of friction rabbling welding (FSW)/friction stir processing (FSP) technology provides a kind of material structure thinning method [18] of novelty.This technology is a kind of solid-state welding technology of Britain's institute of welding invention in 1991, and its principle (as Fig. 1) is: with the pin that the tape spool of a high speed rotating is takeed on, insert the seam crossing of two plates to be welded gradually, move along seam simultaneously.High-speed motion by pin, produce certain high temperature with the welding material friction on the one hand, two workpiece material that driven on the other hand around the pin through hot mastication produce rotation and other compound movement (stirring), intensive plastic flow and complicated mixing take place, form an integral body, thereby reach the purpose of welding two workpiece.Usually, the stirring area material is in solid-state all the time, and tissue is made up of the fine isometric crystal grains that recrystallize forms, and this has determined the mechanical property of weld seam excellence.
Based on the principle of FSW technology to the strong refinement of material structure, friction stir processing (FSP) technology has appearred again, and it is a kind of technology of material structure being carried out modification or preparation composite surface material on the same material surface.Compare with common violent viscous deformation (SPD) technology, the characteristics of FSP technology are to material partly, carry out fast strong plastic working from inside to outside, but not common SPD technology exerting pressure from outward appearance to inner essence.Because the instantaneous process zone of FSP technology is little, plant capacity is required less, can also make material structure intense mixing and homogenizing simultaneously, so advantage such as it is simple and direct efficient to have technology, and stable performance is easy to control, and equipment requirements is low.
At present, the report [19-21] that the aluminum silicon alloy surface is carried out structure refinement about FSP or FSW technology has been arranged on a small quantity.These results show, the violent viscous deformation of conventional FSP technology by the α tissue can shearing-crushing silicon phase, makes its remarkable refinement, and wherein a lot of silicon grains refine to several microns, and unit elongation can be brought up to 10 times [19] of as cast condition.But, in these researchs, do not have to find or report the effect of silicon phase nodularization.
So, refinement and nodularization problem when present technology all can not solve in the cast Al-Si alloy silicon phase well.
Reference:
[1]Crivellone?G，Fuganti?A，Mus?C，Salinas?D.Permanent?mold?gravity?casting?cylinderblock?with?hypereutectic?aluminium?liners.SAE?Special?Publication?SP?1610.(2001)：77-83
[2]Yang?Fuliang，Gan?Weiping，Chen?Zhaoke，Effect?of?extrusion?temperature?on?thephysical?properties?of?high-silicon?aluminum?alloy，Front.Mech.Eng.China，2(1)(2007)：120-124
[3]Haizhi?Ye，An?overview?of?the?development?of?Al-Si-alloy?based?material?for?engineapplications，JMEPEG?12(2003)：288-297
[4]Q.C.Jiang，C.L.Xu，M.Lu，H.Y.Wang，Effect?of?new?Al-P-Ti-TiC-Y?modifier?onprimary?silicon?in?hypereutectic?Al-Si?alloys，Materials?Letters?59(2005)：624-628
[5]Li?Yuanyuan，Zhang?Datong，Ngai?TungwaiLeo，Zhang?Weiwen，Rapidly?solidifiedhypereutectic?Al-Si?alloys?prepared?by?powder?hot?extrusion，Trans.Nonferrous?Met.Soc.China，Vol.12(5)(2000)：878-881
[6]Hamilta?de?Oliveira?Santos，Marilene?Morelli?Serna，Nelson?Batista?de?Lima，Isolda?Costa，Jesualdo?Luiz?Rossi，Crystallographic?Orientation-Spray?Formed?HypereutecticAluminium-Silicon?Alloys，Materials?Research，Vol.8(2)(2005)：181-186
[7]Jacobson DM.Spray-formed?silicon-aluminium.Advanced?Materials&Process，Vol.157(3)(2000)：36-39.
[8]Dheerendra?Kumar?Dwivedi，A.Sharma?and?T.V.Rajan，Influence?of?silicon?morphologyand?mechanical?properties?of?piston?alloys，Materials?and?Manufacturing?Processes，20(2005)：777-791
[9]E.Ogris，A.Wahlen，H.Lüchinger，P.J.Uggowitzer，On?the?silicon?spheroidization?in?Al-Sialloys，Journal?of?Light?Metals?2(2002)：263-269
[10]Osamu?Umezawa?and?Kotobu?Nagai，Microstructural?Refinement?of?an?As-Cast?Al-12.6Wt?Pct?Si?Alloy?by?Repeated?Thermomechanical?Treatment?to?Produce?a?HeavilyDeformable?Material，Metallurgical?and?Materials?Transactions，Vol.30A(1999)：2221-2228
[11]Aibin?Ma，Kazutaka?Suzuki，Naobumi?Saito，Yoshinori?Nishida，Makoto?Takagi，IchinoriShigematsu，Hiroyuki?Iwata，Impact?toughness?of?an?ingot?hypereutectic?Al-23mass％?Sialloy?improved?by?rotary-die?equal-channel?angular?pressing，Materials?Science?andEngineering?A?399(2005)：181-189
[12]J.I.Lee，H.I.Lee?and?M.I.Kim?，Formation?of?spherical?primary?silicon?crystals?duringsemi-solid?processing?of?hypereutectic?Al-15.5wt％Si?alloy，Scripta?Metallurgica?et?Materialia，Vol.32(No.12)(1995)：1945-1949
[13] Mao Weimin, the Japanese plum rope, Zhao Aimin, Cui Chenglin, Zhong Xueyou, induction stirring is to the influence of hypereutectic Al-Si alloy primary silicon growth process and pattern, Materials science and technology, 2001 (2): 117-121
[14] Mao Weimin, Japanese plum rope, Zhao Aimin, Cui Chenglin, Zhong Xueyou, the influence that induction stirring distributes to hypereutectic Al-Si alloy primary silicon, Acta Metallurgica Sinica, 2001 (7): 781-784
[15]Dehong?Lu，Yehua?Jiang，Guisheng?Guan，Rongfeng?Zhou，Zhenhua?Li，Rong?Zhou，Refinement?of?primary?Si?in?hypereutectic?Al-Si?alloy?by?electromagnetic?stirring，Journalof?Materials?Processing?Technology?189(2007)：13-18
[16]H.Wang，In-Situ?Si/Al?Composite?Produced?by?Semisolid?Metal?Processing，Materialsand?Manufacturing?Processes，22(2007)：696-699
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[18]R.S.Mishra，Z.Y.Ma，Friction?stir?welding?and?processing，Materials?Science?andEngineering?R?50(2005)：1-78
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Summary of the invention
The object of the present invention is to provide a kind of friction stir technology processing silumin that utilizes under the high-temperature solid condition, making wherein, all silicon are the method for primary silicon and Eutectic Silicon in Al-Si Cast Alloys refinement simultaneously and nodularization mutually.
The present invention realizes by following technical proposal: the method for silicon phase constitution in a kind of while refinement and the nodularization aluminum silicon alloy is characterized in that through following process steps:
A, the cast Al-Si alloy material is incubated under 200 ℃～melting temperature condition;
B, the threaded pin of the top band turning axle speed with 1～3000 rev/min is screwed in the aluminum silicon alloy material, when pin enters material fully, and the turning axle lower surface is with after the aluminum silicon alloy material surface contacts, again with 1～3000 rev/min speed of rotation, the translational speed of 0～10000m/min, pin and axial rotary front rotation limit is moved, from an end of aluminum silicon alloy material until the other end, promptly finish the processing of a passage, thereby in the treatment zone of this passage, obtain the silicon phase constitution of refinement and nodularization.
The aluminum silicon alloy material that is incubated in the described steps A is: directly from settable liquid and the insulation cast Al-Si alloy material in this temperature province, perhaps be warmed up to the cast Al-Si alloy material of this temperature province from room temperature.
The length of described pin and aluminum silicon alloy material thickness or highly adapt are so that finish the processing of aluminum silicon alloy material thickness in this zone or height in a passage.
The diameter of described pin top turning axle is 1.5～10 times of pin diameter, so that keeping enlarging the treatment zone of aluminum silicon alloy material to greatest extent under the normal handling situation.
The number of times of described processing passage is looked the size of aluminum silicon alloy material area and is determined that specifically the treatment zone of adjacent two passages joins, so that realize the refinement simultaneously of all silicon phase particulate and nodularizations in the aluminum silicon alloy material.
The present invention compared with prior art has following advantage or positively effect: adopt such scheme, can in the aluminum silicon alloy material, realize the refinement and the nodularization of silicon phase simultaneously, and silicon phase grain refine is to below≤10 microns, be that technology such as existing rotten processing are beyond one's reach, it can increase substantially the mechanical property of materials, makes it to have superior plasticity, toughness and higher fatigue strength.Advantages such as in addition, it is simple that the present invention also has technology, and flow process is short have application promise in clinical practice.
Description of drawings
Fig. 1 is a course of processing synoptic diagram of the present invention;
Fig. 2 is the aluminum silicon alloy material microstructure figure with prior art (P is rotten) processing;
Fig. 3 is the aluminum silicon alloy material microstructure figure of the technology of the present invention processing.
Among Fig. 1,1 is pyritous cast Al-Si alloy material, 2 is turning axle, 3 for being connected the pin of turning axle 2 bottoms, a is the sense of rotation of turning axle and pin, b is the travel direction of turning axle and pin, and c is the direction that moves down behind the pin pressurized of turning axle, and 4 is refinement of silicon phase and nodularization zone in the cast Al-Si alloy material 1.
Among Fig. 2, the microtexture of aluminum silicon alloy material (handling with P is rotten) contains thick particulate state primary silicon, and long bar-shaped or acicular Eutectic Silicon in Al-Si Cast Alloys particle.Maximum particle diameter is about 50 microns.
Among Fig. 3, through in the technology of the present invention finished identical cast Al-Si alloy material structure, most of silicon phase particle has been refined into≤10 microns particle, and have only small quantities of particles still bigger, but diameter is also about 30 microns.Simultaneously, granular size no matter, its nodularization is all more obvious.
Embodiment
Embodiment 1
Refinement simultaneously of ZL117 alloy silicon phase particulate and nodularization:
A, with the ZL117 cast material be heated to 470 ℃ and the insulation;
B, utilize milling machine to drive
Turning axle 2, the lower end of turning axle 2 is equipped with one
Pin 3, with 600 rev/mins speed pin 3 is screwed in the ZL117 material 1, behind turning axle 2 end face contact alloy materials 1 surface, turning axle 2 when keeping 600 rev/mins rotation, with the speed of 10m/min forward (b to) move, the pin 3 that links to each other with turning axle 2 is mobile thereupon, as Fig. 1, and in the material that moved, make most silicon obtain refinement simultaneously and nodularization mutually, as Fig. 3.
Embodiment 2
Refinement simultaneously of Al-20%Si alloy silicon phase particulate and nodularization:
A, with the Al-20%Si cast material be heated to 450 ℃ and the insulation;
B, utilize milling machine to drive
Turning axle 2, the lower end of turning axle 2 is equipped with one
Pin 3, with 500 rev/mins speed pin 3 is screwed in the Al-20%Si cast material 1, behind turning axle 2 end face contact alloy materials 1 surface, turning axle 2 is in the rotation of 500 rev/mins of maintenances, with the speed of 5m/min forward (b to) move, the pin 3 that links to each other with turning axle 2 is mobile thereupon, as Fig. 1, and in the material that moved, make most silicon obtain refinement simultaneously and nodularization mutually.
Embodiment 3
Refinement simultaneously of Al-30%Si alloy silicon phase particulate and nodularization:
A, with the Al-30%Si cast material be heated to 480 ℃ and the insulation;
B, utilize milling machine to drive
Turning axle 2, the lower end of turning axle 2 is equipped with one
Pin 3, with 800 rev/mins speed pin 3 is screwed in the ZL117 material 1, behind turning axle 2 end face contact alloy materials 1 surface, turning axle 2 with the speed of 10m/min forward (b to) move, the pin 3 that links to each other with turning axle 2 moves thereupon, as Fig. 1, and in the material that moved, make most silicon obtain refinement simultaneously and nodularization mutually.
Claims (5)
1, the method for silicon phase constitution in a kind of while refinement and the nodularization aluminum silicon alloy is characterized in that through following process steps:
A, the cast Al-Si alloy material is incubated under 200 ℃～melting temperature condition;
B, the threaded pin of the top band turning axle speed with 1～3000 rev/min is screwed in the aluminum silicon alloy material, when pin enters material fully, and the turning axle lower surface is with after the aluminum silicon alloy material surface contacts, again with 1～3000 rev/min speed of rotation, the translational speed of 0～10000m/min, pin and axial rotary front rotation limit is moved, from an end of aluminum silicon alloy material until the other end, promptly finish the processing of a passage, thus in the treatment zone of this passage, obtain refinement simultaneously and nodularization the silicon phase constitution.
2, the method for silicon phase constitution in while refinement according to claim 1 and the nodularization aluminum silicon alloy, the cast Al-Si alloy material that it is characterized in that described steps A from settable liquid and the insulation material in this temperature province, also can be the material that is warmed up to this temperature province from room temperature for directly.
3, the method for silicon phase constitution in while refinement according to claim 1 and the nodularization aluminum silicon alloy, it is characterized in that the length and the aluminum silicon alloy material thickness of described pin or highly adapt, so that in a passage, finish the processing of aluminum silicon alloy material thickness in this zone or height.
4, the method for silicon phase constitution in while refinement according to claim 1 and the nodularization aluminum silicon alloy, the diameter that it is characterized in that described pin top turning axle is 1.5～10 times of pin diameter, so that keeping enlarging the treatment zone of aluminum silicon alloy material to greatest extent under the normal handling situation.
5, the method for silicon phase constitution in while refinement according to claim 1 and the nodularization aluminum silicon alloy, the number of times that it is characterized in that described processing passage is looked the big or small concrete definite of aluminum silicon alloy material area, the treatment zone of adjacent two passages joins, to realize refinement simultaneously of all silicon phase particulate and nodularization in the aluminum silicon alloy material.
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| CN2008100585838A CN101302587B (en) | 2008-06-24 | 2008-06-24 | Method for refining and sphericizing silicon-phase structure in aluminum silicon alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150165A (en) * | 2017-04-19 | 2017-09-12 | 东北大学 | A kind of method that mixing yoghurt prevention aluminum alloy lapped welds grain boundary liquation crackle |
| CN107442743A (en) * | 2017-08-21 | 2017-12-08 | 安徽省含山县兴建铸造厂 | A kind of Al-alloy products shell moulded casting method |
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2008
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107150165A (en) * | 2017-04-19 | 2017-09-12 | 东北大学 | A kind of method that mixing yoghurt prevention aluminum alloy lapped welds grain boundary liquation crackle |
| CN107150165B (en) * | 2017-04-19 | 2020-01-07 | 东北大学 | Method for preventing aluminum alloy lap welding crystal boundary liquification cracks through friction stir processing |
| CN107442743A (en) * | 2017-08-21 | 2017-12-08 | 安徽省含山县兴建铸造厂 | A kind of Al-alloy products shell moulded casting method |
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