CN101497948A - Preparation of low hot cracking tendency Al-5% Cu based alloy - Google Patents
Preparation of low hot cracking tendency Al-5% Cu based alloy Download PDFInfo
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- CN101497948A CN101497948A CNA2009100715709A CN200910071570A CN101497948A CN 101497948 A CN101497948 A CN 101497948A CN A2009100715709 A CNA2009100715709 A CN A2009100715709A CN 200910071570 A CN200910071570 A CN 200910071570A CN 101497948 A CN101497948 A CN 101497948A
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Abstract
The invention relates to a method for preparing an Al-5 percent Cu-based alloy with low hot-cracking, belonging to a method for preparing the Al-5 percent Cu-based alloy, which solves the problems that the prior method for preparing the Al-5 percent Cu-based alloy has disadvantages of complicated technology, wide range of crystallization temperature and the shrinkage porosity of alloy structure so that the Al-5 percent Cu-based alloy having high hot-cracking tendency in the casting process to produce casting defects. The method comprises the following steps: firstly, raw materials are weighted and cleaned in surfaces and then are mixed together to be put in a graphite crucible after being dried; secondly, the raw materials in the graphite crucible are melted completely, and then argon gas is pumped into the graphite crucible, and the raw materials are taken out after air cooling to obtain the Al-5 percent Cu-based alloy with low hot-cracking tendency. The invention has the advantages of simple technology, narrowed range of crystallization temperature and dense alloy structure, and reduces the hot-cracking tendency of the Al-5 percent Cu-based alloy in the casting process, and the maximum value of hot-cracking resistance is 370 N to 520 N, and the hot-cracking resistance is increased by 12.1 to 57.6 percent, and the casting defects are reduced.
Description
Technical field
The present invention relates to a kind of preparation method of Al-5%Cu base alloy.
Background technology
Al-5%Cu base alloy is the aluminum-copper alloy that contains Cu5wt%, and it has high strength, and advantages such as good plasticity, toughness and resistance to corrosion are widely used in aerospace field.But there is complex process in the method for the Al-5%Cu of preparation base alloy at present, and crystallization range is wide, and the alloy structure shrinkage porosite causes Al-5%Cu base alloy hot cracking tendency height in castingprocesses, produces the problem of casting flaw.
Summary of the invention
The present invention seeks to have complex process for the preparation method who solves existing Al-5%Cu base alloy, crystallization range is wide, the alloy structure shrinkage porosite, cause Al-5%Cu base alloy hot cracking tendency height in castingprocesses, produce the problem of casting flaw, and a kind of preparation method of low heat cracking tendency Al-5%Cu base alloy is provided.
The preparation method of low heat cracking tendency Al-5%Cu base alloy realizes according to the following steps: one, taking by weighing 64.25%～82.85% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 2%～5% aluminium manganese master alloy, 1.25%～5% aluminium zirconium hardener, 1.25%～7.5% aluminium vanadium master alloy, 2%～5% Al-Ti-B intermediate alloy, 0.15%～0.25% cadmium and 0.5%～3% aluminium yttrium master alloy, be that 10% NaOH carries out surface cleaning with mass concentration then, mix in the plumbago crucible of packing into dry back; Two, plumbago crucible is placed be heated to the raw material that takes by weighing under 700～750 ℃ the condition and melt fully, feed quality purity then and be argon gas 30～60min of 99.99%, take out behind the air cooling, promptly get low heat cracking tendency Al-5%Cu base alloy; Aluminum bronze master alloy cupric 50wt% in the step 1 wherein; Aluminium manganese master alloy contains manganese 10wt%; Aluminium zirconium hardener contains zirconium 4wt%; Aluminium vanadium master alloy contains vanadium 4wt%; Al-Ti-B intermediate alloy titaniferous 5wt%, boracic 1wt%; It is 10wt% that aluminium yttrium master alloy contains yttrium.
Technology of the present invention is simple, and easy handling does not contain noble element in the raw material, and production cost is low; The adding of middle-weight rare earths element Y of the present invention (yttrium) has been dwindled the Tc interval of Al-5%Cu base alloy, in addition, Y and Al, Cu and V (vanadium) etc. have stronger interaction, form compound, and separate out along crystal boundary, at the alloy graining secondary dendrite arm spacing that stoped the grain growing refinement in earlier stage, thereby refinement alloy structure, and metamorphism has been played at crystal boundary place second mutually, make alloy structure become more tiny, fine and close, reduced Al-5%Cu base alloy hot cracking tendency in castingprocesses, its maximum hot tearing drag value is 370～520N, with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 12.1%～57.6%, has reduced casting flaw.
Description of drawings
Fig. 1 is the freezing curve figure of gained low heat cracking tendency Al-5%Cu base alloy in the embodiment ten.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the preparation method of present embodiment low heat cracking tendency Al-5%Cu base alloy realizes according to the following steps: one, taking by weighing 64.25%～82.85% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 2%～5% aluminium manganese master alloy, 1.25%～5% aluminium zirconium hardener, 1.25%～7.5% aluminium vanadium master alloy, 2%～5% Al-Ti-B intermediate alloy, 0.15%～0.25% cadmium and 0.5%～3% aluminium yttrium master alloy, be that 10% NaOH carries out surface cleaning with mass concentration then, mix in the plumbago crucible of packing into dry back; Two, plumbago crucible is placed be heated to the raw material that takes by weighing under 700～750 ℃ the condition and melt fully, feed quality purity then and be argon gas 30～60min of 99.99%, take out behind the air cooling, promptly get low heat cracking tendency Al-5%Cu base alloy; Aluminum bronze master alloy cupric 50wt% in the step 1 wherein; Aluminium manganese master alloy contains manganese 10wt%; Aluminium zirconium hardener contains zirconium 4wt%; Aluminium vanadium master alloy contains vanadium 4wt%; Al-Ti-B intermediate alloy titaniferous 5wt%, boracic 1wt%; It is 10wt% that aluminium yttrium master alloy contains yttrium.
Embodiment two: present embodiment and embodiment one are different is that to take by weighing 71.8% quality purity by mass ratio in the step 1 be 99.99% aluminium, 10% aluminum bronze master alloy, 3% aluminium manganese master alloy, 4% aluminium zirconium hardener, 6.5% aluminium vanadium master alloy, 3% Al-Ti-B intermediate alloy, 0.2% cadmium and 1.5% aluminium yttrium master alloy.Other step and parameter are identical with embodiment one.
Gained low heat cracking tendency Al-5%Cu base alloy in the present embodiment, its maximum hot tearing drag value is 420N after testing, with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 33.5%.
Embodiment three: present embodiment and embodiment one are different is that to take by weighing 72.8% quality purity by mass ratio in the step 1 be 99.99% aluminium, 10% aluminum bronze master alloy, 4% aluminium manganese master alloy, 3% aluminium zirconium hardener, 5% aluminium vanadium master alloy, 3% Al-Ti-B intermediate alloy, 0.2% cadmium and 2% aluminium yttrium master alloy.Other step and parameter are identical with embodiment one.
Gained low heat cracking tendency Al-5%Cu base alloy in the present embodiment, its maximum hot tearing drag value is 400N after testing, with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 31.4%.
Embodiment four: present embodiment and embodiment one are different is that to take by weighing 67.75% quality purity by mass ratio in the step 1 be 99.99% aluminium, 10% aluminum bronze master alloy, 2% aluminium manganese master alloy, 5% aluminium zirconium hardener, 7.5% aluminium vanadium master alloy, 5% Al-Ti-B intermediate alloy, 0.25% cadmium and 2.5% aluminium yttrium master alloy.Other step and parameter are identical with embodiment one.
Gained low heat cracking tendency Al-5%Cu base alloy in the present embodiment, its maximum hot tearing drag value is 390N after testing, with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 22.5%.
Embodiment five: present embodiment and embodiment one are different is that to take by weighing 82.35% quality purity by mass ratio in the step 1 be 99.99% aluminium, 10% aluminum bronze master alloy, 2% aluminium manganese master alloy, 1.25% aluminium zirconium hardener, 1.25% aluminium vanadium master alloy, 2% Al-Ti-B intermediate alloy, 0.15% cadmium and 1% aluminium yttrium master alloy.Other step and parameter are identical with embodiment one.
Gained low heat cracking tendency Al-5%Cu base alloy in the present embodiment, its maximum hot tearing drag value is 500N after testing, with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 52.5%.
Embodiment six: present embodiment and embodiment one, two, three, four or five are different is in the step 2 plumbago crucible to be placed under 720～740 ℃ the condition to heat.Other step and parameter are identical with embodiment one, two, three, four or five.
Embodiment seven: present embodiment and embodiment six are different is in the step 2 plumbago crucible to be placed under 730 ℃ the condition to heat.Other step and parameter are identical with embodiment six.
Embodiment eight: present embodiment and embodiment seven are different is that to feed quality purity in the step 2 be argon gas 40～50min of 99.99%.Other step and parameter are identical with embodiment seven.
Embodiment nine: present embodiment and embodiment seven are different is that to feed quality purity in the step 2 be 99.99% argon gas 45min.Other step and parameter are identical with embodiment seven.
Embodiment ten: the preparation method of present embodiment low heat cracking tendency Al-5%Cu base alloy realizes according to the following steps: one, taking by weighing 64.25% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 5% aluminium manganese master alloy, 5% aluminium zirconium hardener, 7.5% aluminium vanadium master alloy, 5% Al-Ti-B intermediate alloy, 0.25% cadmium and 3% aluminium yttrium master alloy, be that 10% NaOH carries out surface cleaning with mass concentration then, mix in the plumbago crucible of packing into dry back; Two, plumbago crucible is placed be heated to the raw material that takes by weighing under 750 ℃ the condition and melt fully, feed quality purity then and be 99.99% argon gas 50min, take out behind the air cooling, promptly get low heat cracking tendency Al-5%Cu base alloy; Aluminum bronze master alloy cupric 50wt% in the step 1 wherein; Aluminium manganese master alloy contains manganese 10wt%; Aluminium zirconium hardener contains zirconium 4wt%; Aluminium vanadium master alloy contains vanadium 4wt%; Al-Ti-B intermediate alloy titaniferous 5wt%, boracic 1wt%; It is 10wt% that aluminium yttrium master alloy contains yttrium.
Gained low heat cracking tendency Al-5%Cu base alloy in the present embodiment, after testing by among Fig. 1 as can be known, the Tc interval of Al-5%Cu base alloy has dwindled, because add the liquidus line T of alloy behind the Y element
ESignificantly reduce solidus curve T
NSlightly rise, so the crystallizing range Δ T=T of alloy
E-T
NDwindle, improved the hot cracking tendency of alloy; Its maximum hot tearing drag value is 520N after testing, and with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 57.6%.
Embodiment 11: the preparation method of present embodiment low heat cracking tendency Al-5%Cu base alloy realizes according to the following steps: one, taking by weighing 75% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 3.5% aluminium manganese master alloy, 3.75% aluminium zirconium hardener, 2% aluminium vanadium master alloy, 4% Al-Ti-B intermediate alloy, 0.25% cadmium and 1.5% aluminium yttrium master alloy, be that 10% NaOH carries out surface cleaning with mass concentration then, mix in the plumbago crucible of packing into dry back; Two, plumbago crucible is placed be heated to the raw material that takes by weighing under 730 ℃ the condition and melt fully, feed quality purity then and be 99.99% argon gas 60min, take out behind the air cooling, promptly get low heat cracking tendency Al-5%Cu base alloy; Aluminum bronze master alloy cupric 50wt% in the step 1 wherein; Aluminium manganese master alloy contains manganese 10wt%; Aluminium zirconium hardener contains zirconium 4wt%; Aluminium vanadium master alloy contains vanadium 4wt%; Al-Ti-B intermediate alloy titaniferous 5wt%, boracic 1wt%; It is 10wt% that aluminium yttrium master alloy contains yttrium.
Gained low heat cracking tendency Al-5%Cu base alloy in the present embodiment, its maximum hot tearing drag value is 450N after testing, with the same system Al-5%Cu base alloy phase ratio of not handling through the interpolation Rare Earth Y, the hot tearing drag has increased by 36.4%.
Claims (9)
1, a kind of preparation method of low heat cracking tendency Al-5%Cu base alloy, the preparation method who it is characterized in that low heat cracking tendency Al-5%Cu base alloy realizes according to the following steps: one, taking by weighing 64.25%～82.85% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 2%～5% aluminium manganese master alloy, 1.25%～5% aluminium zirconium hardener, 1.25%～7.5% aluminium vanadium master alloy, 2%～5% Al-Ti-B intermediate alloy, 0.15%～0.25% cadmium and 0.5%～3% aluminium yttrium master alloy, be that 10% NaOH carries out surface cleaning with mass concentration then, mix in the plumbago crucible of packing into dry back; Two, plumbago crucible is placed be heated to the raw material that takes by weighing under 700～750 ℃ the condition and melt fully, feed quality purity then and be argon gas 30～60min of 99.99%, take out behind the air cooling, promptly get low heat cracking tendency Al-5%Cu base alloy; Aluminum bronze master alloy cupric 50wt% in the step 1 wherein; Aluminium manganese master alloy contains manganese 10wt%; Aluminium zirconium hardener contains zirconium 4wt%; Aluminium vanadium master alloy contains vanadium 4wt%; Al-Ti-B intermediate alloy titaniferous 5wt%, boracic 1wt%; It is 10wt% that aluminium yttrium master alloy contains yttrium.
2, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 1 is characterized in that in the step 1 that taking by weighing 71.8% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 3% aluminium manganese master alloy, 4% aluminium zirconium hardener, 6.5% aluminium vanadium master alloy, 3% Al-Ti-B intermediate alloy, 0.2% cadmium and 1.5% aluminium yttrium master alloy.
3, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 1 is characterized in that in the step 1 that taking by weighing 72.8% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 4% aluminium manganese master alloy, 3% aluminium zirconium hardener, 5% aluminium vanadium master alloy, 3% Al-Ti-B intermediate alloy, 0.2% cadmium and 2% aluminium yttrium master alloy.
4, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 1 is characterized in that in the step 1 that taking by weighing 67.75% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 2% aluminium manganese master alloy, 5% aluminium zirconium hardener, 7.5% aluminium vanadium master alloy, 5% Al-Ti-B intermediate alloy, 0.25% cadmium and 2.5% aluminium yttrium master alloy.
5, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 1 is characterized in that in the step 1 that taking by weighing 82.35% quality purity by mass ratio is 99.99% aluminium, 10% aluminum bronze master alloy, 2% aluminium manganese master alloy, 1.25% aluminium zirconium hardener, 1.25% aluminium vanadium master alloy, 2% Al-Ti-B intermediate alloy, 0.15% cadmium and 1% aluminium yttrium master alloy.
6,, it is characterized in that in the step 2 plumbago crucible placed under 720～740 ℃ the condition and heat according to the preparation method of claim 1,2,3,4 or 5 described a kind of low heat cracking tendency Al-5%Cu base alloys.
7, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 6 is characterized in that in the step 2 plumbago crucible placed under 730 ℃ the condition and heats.
8, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 7 is characterized in that feeding in the step 2 quality purity and is argon gas 40～50min of 99.99%.
9, the preparation method of a kind of low heat cracking tendency Al-5%Cu base alloy according to claim 7 is characterized in that feeding in the step 2 quality purity and is 99.99% argon gas 45min.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034873A (en) * | 2017-11-20 | 2018-05-15 | 湖州亨达铝业有限公司 | A kind of Al-6%Cu alloys of low hot cracking tendency and preparation method thereof |
| CN110004315A (en) * | 2019-01-28 | 2019-07-12 | 兰州理工大学 | Based on nanometer Y2O3The method of particle improvement ZL205A Hot-Crack Tendency of Alloy |
| CN110699566A (en) * | 2019-06-28 | 2020-01-17 | 哈尔滨工业大学 | CaMn7O12Reinforced low-expansion high-thermal-conductivity copper-based composite material and preparation method thereof |
| CN111118357A (en) * | 2020-01-17 | 2020-05-08 | 四川大学 | Aluminum-copper-tellurium alloy and preparation method thereof |
| CN112458327A (en) * | 2020-11-09 | 2021-03-09 | 哈尔滨理工大学 | Method for improving organization and mechanical property of ZL207 aluminum alloy |
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2009
- 2009-03-18 CN CNA2009100715709A patent/CN101497948A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034873A (en) * | 2017-11-20 | 2018-05-15 | 湖州亨达铝业有限公司 | A kind of Al-6%Cu alloys of low hot cracking tendency and preparation method thereof |
| CN110004315A (en) * | 2019-01-28 | 2019-07-12 | 兰州理工大学 | Based on nanometer Y2O3The method of particle improvement ZL205A Hot-Crack Tendency of Alloy |
| CN110699566A (en) * | 2019-06-28 | 2020-01-17 | 哈尔滨工业大学 | CaMn7O12Reinforced low-expansion high-thermal-conductivity copper-based composite material and preparation method thereof |
| CN110699566B (en) * | 2019-06-28 | 2021-08-10 | 哈尔滨工业大学 | CaMn7O12Reinforced low-expansion high-thermal-conductivity copper-based composite material and preparation method thereof |
| CN111118357A (en) * | 2020-01-17 | 2020-05-08 | 四川大学 | Aluminum-copper-tellurium alloy and preparation method thereof |
| CN111118357B (en) * | 2020-01-17 | 2021-06-08 | 四川大学 | Aluminum-copper-tellurium alloy and preparation method thereof |
| CN112458327A (en) * | 2020-11-09 | 2021-03-09 | 哈尔滨理工大学 | Method for improving organization and mechanical property of ZL207 aluminum alloy |
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