CN1363707A - Process for preparing non-tree-crystal Al alloy - Google Patents
Process for preparing non-tree-crystal Al alloy Download PDFInfo
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- CN1363707A CN1363707A CN 01105114 CN01105114A CN1363707A CN 1363707 A CN1363707 A CN 1363707A CN 01105114 CN01105114 CN 01105114 CN 01105114 A CN01105114 A CN 01105114A CN 1363707 A CN1363707 A CN 1363707A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 20
- 239000013078 crystal Substances 0.000 title description 19
- 238000004519 manufacturing process Methods 0.000 title description 6
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 16
- 229910018125 Al-Si Inorganic materials 0.000 claims abstract description 11
- 229910018520 Al—Si Inorganic materials 0.000 claims abstract description 11
- 239000012452 mother liquor Substances 0.000 claims abstract description 9
- 238000007872 degassing Methods 0.000 claims abstract description 4
- 238000007670 refining Methods 0.000 claims abstract description 4
- 229910021364 Al-Si alloy Inorganic materials 0.000 claims abstract 4
- 238000002844 melting Methods 0.000 claims abstract 2
- 230000008018 melting Effects 0.000 claims abstract 2
- 239000011863 silicon-based powder Substances 0.000 claims description 12
- 238000005551 mechanical alloying Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 9
- 238000005266 casting Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 description 16
- 239000002184 metal Substances 0.000 description 16
- 239000000956 alloy Substances 0.000 description 14
- 229910045601 alloy Inorganic materials 0.000 description 13
- 239000012071 phase Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 4
- 230000005496 eutectics Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000010907 mechanical stirring Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010118 rheocasting Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Continuous Casting (AREA)
Abstract
本发明涉及一种非树枝晶铝合金的制备方法,特别是非树枝晶铝合金金属坯料的制备方法。包括铝合金经常规的熔化、去渣、除气、精炼后,在处于650－720℃之间温度的母液中按0.1－2.0%wt的比例加入晶粒度为50－300nm的Al－Si合金粉末,再进行搅拌使Al－Si均匀分布在母液中,经冷却至室温即可获得非树枝晶铝合金。本发明的优点是:工艺简单、操作方便和成本低,可细化铝合金铸造中的晶粒,提高流变铸造的实用性和可靠性。
The invention relates to a method for preparing a non-dendritic aluminum alloy, in particular to a method for preparing a non-dendritic aluminum alloy blank. After conventional melting, deslagging, degassing and refining of aluminum alloy, Al-Si alloy with a grain size of 50-300nm is added in the proportion of 0.1-2.0%wt to the mother liquor at a temperature between 650-720°C powder, then stirred to make the Al-Si uniformly distributed in the mother liquor, and the non-dendritic aluminum alloy can be obtained after cooling to room temperature. The invention has the advantages of simple process, convenient operation and low cost, can refine grains in aluminum alloy casting, and improves the practicability and reliability of rheological casting.
Description
The present invention relates to a kind of preparation method of non-tree-crystal Al alloy, particularly the preparation method of non-tree-crystal Al alloy metal stock.
Non-tree-crystal metal forming (semi-solid-state shaping) is the metal fabrication methods that has merged casting and forging process characteristics, and this method has save energy, prolong die life, improve the quality of products and performance and be convenient to the advantage of mass automatic production.The prerequisite of non-tree-crystal metal forming is to produce the metal stock of non-tree-crystal tissue earlier, the tissue of this blank and the branch of routine casting gained are crystalline organize different, its primary phase has the advantages that particulate state is the non-tree-crystal shape, make it have good thixotropic property at solid-liquid two-phase region, under certain shearing action, its viscosity sharply descends, thereby can utilize manufacturing process such as common die casting, extruding, die forging, injection to realize Semi-Solid Metals Forming.The existing method for preparing the non-tree-crystal metal has two classes.The first is carried out strong agitation in the process of setting of liquid metal, make the dentrite network skeleton that is easy to the nascent solid phase that forms in the process of setting broken, and keep disperse, homogeneous granules shape tissue topography, obtain semi-solid-state metal.As: United States Patent (USP) 3902544 (1975) has proposed a kind of method that adopts mechanical stirring to prepare the non-tree-crystal metal; United States Patent (USP) 3995678 (1976) has also proposed the employing induction stirring and has claimed hydromagnetics method (MHD) to prepare the method for non-tree-crystal metal again.It two is that the ingot casting with common dentrite tissue is applied reactive force, makes it produce deformation, and makes primary phase change particulate state in heat treatment process subsequently, thereby obtain the non-tree-crystal metal.For example: United States Patent (USP) 4.415.374 (1983) has proposed strain inducing fusing activation method (Strain Induced MeltActivation S1MA) preparation non-tree-crystal metal.The deficiency of aforesaid method one is that mechanical stirring equipment is huge, and agitator contacts all the time with molten metal in metal solidification process, easily causes molten metal to pollute; Though induction stirring has overcome churned mechanically deficiency, power consumption is bigger, and equipment is also complicated.The deficiency of aforesaid method two is production cost costlinesses, only is fit to produce undersized blank.
The preparation method who the purpose of this invention is to provide a kind of non-tree-crystal Al alloy, it has the advantage that technology is simple, easy to operate, cost is low and be not subjected to the billet size restriction.
For achieving the above object, the present invention be achieved in that aluminium alloy through the fusing of routine, remove slag, after the degasification, refining, ratio adding grain fineness number in 0.1-2.0%wt in the mother liquor that is in temperature between 650-720 ℃ is the Al-Si powdered alloy of 50-300nm, the Al-Si powdered alloy, press Al powder 15-85%wt by Al powder and Si powder, the mixed of Si powder 85-15%wt after the conventional mechanical alloying form, stir again the Al-Si powdered alloy is evenly distributed in the mother liquor, can obtain non-tree-crystal Al alloy through naturally cooling to room temperature.
The best proportioning of above-mentioned Al-Si powdered alloy is: Al powder and Si powder are pressed Al powder 40-60%wt, the mixed of Si powder 60-40%wt.
The present invention is owing to only need to add the Al-Si powdered alloy in the aluminium alloy mother liquor, can obtain non-tree-crystal Al alloy easily, both overcome that huge, the easy pollution of mechanical stirring equipment, power consumption in original method are big, production cost is expensive and be subjected to the deficiency of billet size restriction, had again that technology is simple, easy to operate, molten metal is pollution-free, be not subjected to billet size restriction and the low advantage of cost.In addition, the present invention also has the effect of refinement primary phase and eutectic structure, both can prepare non-tree-crystal Al alloy, but the crystal grain in the conventional aluminium alloy casting process of refinement again, material property is further improved, and can combine with rheocasting, to improve the practicality and the reliability of rheocasting technology.
Provide embodiments of the invention and process flow sheet below, and be described further:
Fig. 1, be process flow sheet of the present invention;
Fig. 2, the ZL101A alloy organizing shape appearance figure that obtains for the present invention;
Fig. 3, common ZL101A alloy organizing shape appearance figure.
By shown in Figure 1, Al powder and Si powder, press Al powder 15-85%wt, the ratio weighing and burden of Si powder 85-15%wt, its best proportioning is: Al powder and Si powder are pressed Al powder 40-60%wt, Si powder 60-40%wt, carry out mechanical alloying then, with the grain fineness number of X-ray diffraction mensuration Al-Si powdered alloy, obtaining grain fineness number is the Al-Si powdered alloy of 50-300nm, i.e. the short deformed nucleus agent of homogeneity Al-Si.Common ZL101A alloy through conventional fusing, remove slag, after the degasification, refining treatment, ratio in 0.1-2.0%wt in the mother liquor that is in temperature between 650-720 ℃ adds the short deformed nucleus agent of above-mentioned homogeneity Al-Si, it is evenly distributed in the mother liquor, pour into a mould, naturally cool to room temperature then, can obtain the non-tree-crystal Al alloy material base.
Fig. 2 is the ZL101A alloy organizing shape appearance figure that adopts the technical process acquisition of Fig. 1, white portion is primary-Al phase in Fig. 2, present rosette and oval-shaped mixed style, black part is divided into eutectic Si tissue, be more tiny needle-like and sheet, promptly eutectic structure has also obtained refinement when forming semi-solid alloy, and material property is further improved.
Fig. 3 is common ZL101A alloy organizing shape appearance figure, and white portion is primary-Al phase in Fig. 3, presents the crystalline tissue of branch of tangible prosperity, and black part is divided into eutectic structure, is needle-like and sheet.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01105114 CN1114707C (en) | 2001-01-09 | 2001-01-09 | Process for preparing non-tree-crystal Al alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01105114 CN1114707C (en) | 2001-01-09 | 2001-01-09 | Process for preparing non-tree-crystal Al alloy |
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| Publication Number | Publication Date |
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| CN1363707A true CN1363707A (en) | 2002-08-14 |
| CN1114707C CN1114707C (en) | 2003-07-16 |
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| CN 01105114 Expired - Fee Related CN1114707C (en) | 2001-01-09 | 2001-01-09 | Process for preparing non-tree-crystal Al alloy |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955981A (en) * | 2017-05-05 | 2017-07-18 | 珠海市润星泰电器有限公司 | A kind of preparation method of semisolid state slurry thereof |
| CN111001778A (en) * | 2019-12-31 | 2020-04-14 | 北京科技大学 | A method for efficiently preparing large volume semi-solid slurry by composite process |
-
2001
- 2001-01-09 CN CN 01105114 patent/CN1114707C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106955981A (en) * | 2017-05-05 | 2017-07-18 | 珠海市润星泰电器有限公司 | A kind of preparation method of semisolid state slurry thereof |
| CN111001778A (en) * | 2019-12-31 | 2020-04-14 | 北京科技大学 | A method for efficiently preparing large volume semi-solid slurry by composite process |
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| Publication number | Publication date |
|---|---|
| CN1114707C (en) | 2003-07-16 |
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