CN102021447A - Manufacture method of extra super duralumin alloy cast ingots - Google Patents
Manufacture method of extra super duralumin alloy cast ingots Download PDFInfo
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- CN102021447A CN102021447A CN 201010615744 CN201010615744A CN102021447A CN 102021447 A CN102021447 A CN 102021447A CN 201010615744 CN201010615744 CN 201010615744 CN 201010615744 A CN201010615744 A CN 201010615744A CN 102021447 A CN102021447 A CN 102021447A
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Abstract
The invention discloses a manufacture method of extra super duralumin alloy cast ingots, relating to a manufacture method of cast ingots. The invention aims at solving the problem of low yield due to the inner wall crack of the cast ingots manufactured by the existing casting method. The manufacture method of the extra super duralumin alloy cast ingots comprises the following steps: weighting raw materials, feeding the argon to refine after smelting, and manufacturing the extra super duralumin alloy cast ingots through the semi-continuous casting method. By using the casting method disclosed by the invention, the brittlement region of the aluminum alloy cast ingots is reduced, the heating crack resistance of the alloy is enhanced, the casting stress is reduced, and the casting performance of the extra super duralumin alloy is improved. The molding rate of the cast ingot reaches 62.3% and is enhanced by 7.3%, and the yield reaches 74.1% and is enhanced by 11.8% compared with that of the prior art. The manufacture method disclosed by the invention can be used in the field of manufacturing important structural elements.
Description
Technical field
The present invention relates to a kind of manufacture method of ingot casting.
Background technology
Super-hard aluminum alloys has high specific strength and excellent comprehensive performances, is the important structure material of industrial sector.But the ingot casting inner surface cracks appears in super-hard aluminum alloys hollow round ingot casting easily in castingprocesses.Super-hard aluminum alloys itself belongs to high-strength low plastotype alloy, from preventing the angle of ingot casting inner surface cracks, except improving the melt clarity, reasonably controlling the chemical ingredients, selects rational fuse tapering also very important.
Fuse is embraced when preventing the contraction of ingot casting in the aluminium alloy pipe semicontinuous casting process, generally all fuse should be had certain tapering.The too small ingot casting endoporus that easily makes of tapering causes the endoporus radial crack because of contraction, and tapering is excessive then can to cause the serious second-heating in ingot casting internal skin, even causes the endoporus quenching crack.
Summary of the invention
The present invention is in order to solve that ingot casting that existing castmethod prepares produces that inner surface cracks causes the low problem of yield rate and manufacture method that a kind of super-hard aluminum alloys ingot casting is provided.
The manufacture method of a kind of super-hard aluminum alloys of the present invention realizes according to the following steps: one, take by weighing batching: the mass percent by element is Cu:1.4%～2.0%, Mn:0.2%～0.6%, Mg:1.8%～2.8%, Cr:0.1%～0.25%, Zn:5.0%～7.2%, Fe: Si≤0.3% :≤0.15%, surplus is Al, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively; Two, the batching that step 1 the is taken by weighing melting in the resistance reverberatory furnace of packing into from both sides fire door convection agitation 10～15min, forms melt under 700～750 ℃ condition; Three, half melt that dips 5～20mL carries out chemical ingredients and detects from the melt degree of depth, after chemical ingredients in the melt meets elementary composition described in the step 1, melt is imported leaving standstill in the stove of resistance reverberatory furnace, feed argon gas refining 8～15min, leave standstill 10～30min then, obtain the melt after the refining; Four,, be that 70～90mm/min, casting temp are that 710～740 ℃, cooling water pressure are that the melt casting that obtains after the refining in step 3 under the condition of 0.03～0.10MPa becomes the super-hard aluminum alloys ingot casting in casting speed by the semicontinuous casting method; Wherein using tapering in the step 4 semicontinuous casting process is 1: 13～17 fuse.
The present invention prepares the employed method of super-hard aluminum alloys ingot casting by control Fe and Si content, and free silica quantity and eutectic amount in the super-hard aluminum alloys ingot casting are reduced, and has dwindled the scope of brittle zone, thereby has improved the ability of prepared alloy opposing thermal crack; The rational Match of the present invention's processing parameter in castingprocesses has reduced casting stress, has improved the castability of super-hard aluminum alloys, and the ingot casting ratio of briquetting reaches 62.3%, has improved 7.3%; The present invention selects tapering in castingprocesses be 1: 14 fuse, reduced the probability that the super-hard aluminum alloys ingot casting produces inner surface cracks, and yield rate reaches 74.1%, improve 11.8% than prior art.
Preparation method of the present invention has realized that technology is simple to the improvement of the castability of super-hard aluminum alloys ingot casting, realizes easily, need not increase specific installation.
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 manufacture method of a kind of super-hard aluminum alloys ingot casting of present embodiment can realize according to the following steps: one, take by weighing batching: the mass percent by element is Cu:1.4%～2.0%, Mn:0.2%～0.6%, Mg:1.8%～2.8%, Cr:0.1%～0.25%, Zn:5.0%～7.2%, Fe: Si≤0.3% :≤0.15%, surplus is Al, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively; Two, the batching that step 1 the is taken by weighing melting in the resistance reverberatory furnace of packing into from both sides fire door convection agitation 10～15min, forms melt under 700～750 ℃ condition; Three, half melt that dips 5～20mL carries out chemical ingredients and detects from the melt degree of depth, after chemical ingredients in the melt meets elementary composition described in the step 1, melt is imported leaving standstill in the stove of resistance reverberatory furnace, feed argon gas refining 8～15min, leave standstill 10～30min then, obtain the melt after the refining; Four,, be that 70～90mm/min, casting temp are that 710～740 ℃, cooling water pressure are that the melt casting that obtains after the refining in step 3 under the condition of 0.03～0.10MPa becomes the super-hard aluminum alloys ingot casting in casting speed by the semicontinuous casting method; Wherein using tapering in the step 4 semicontinuous casting process is 1: 13～17 fuse.
Embodiment two: present embodiment and embodiment one are different is to be that Cu:1.6%～1.8%, Mn:0.3%～0.5%, Mg:2.0%～2.5%, Cr:0.15%～0.2%, Zn:5.5%～6.5%, Fe:0.01%～0.28%, Si:0.02～0.12%, surplus are Al by the mass percent of element in the step 1, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively.Other steps are identical with embodiment one with parameter.
Embodiment three: present embodiment is different with embodiment one or two be in the step 2 under 710～740 ℃ condition convection agitation 12～14min.Other steps are identical with embodiment one or two with parameter.
Embodiment four: what present embodiment and embodiment three were different is to feed argon gas refining 10～12min in the step 3, leaves standstill 15～25min then.Other steps are identical with embodiment three with parameter.
Embodiment five: present embodiment and embodiment four are different is to be that 75～85mm/min, casting temp are that 720～730 ℃, cooling water pressure are to be cast as the super-hard aluminum alloys ingot casting under the condition of 0.05～0.08MPa in casting speed in the step 4.Other steps are identical with embodiment four with parameter.
Embodiment six: present embodiment and embodiment five are different is that to use tapering in the step 4 semicontinuous casting process be 1: 14～16 fuse.Other steps are identical with embodiment five with parameter.
Embodiment seven: the manufacture method of a kind of super-hard aluminum alloys ingot casting of present embodiment can realize according to the following steps: one, take by weighing batching: the mass percent by element is Cu:1.4%～2.0%, Mn:0.2%～0.6%, Mg:1.8%～2.8%, Cr:0.1%～0.25%, Zn:5.0%～7.2%, Fe: Si≤0.3% :≤0.15%, surplus is Al, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively; Two, batching is loaded to melting in the resistance reverberatory furnace, under 720 ℃ condition,, forms melt from both sides fire door convection agitation 12min; Three, half melt that dips 10mL carries out chemical ingredients and detects from the melt degree of depth, after chemical ingredients in the melt meets elementary composition described in the step 1, import the leaving standstill in the stove of resistance reverberatory furnace, feed argon gas refining 10min, leave standstill 15min then, obtain the melt after the refining; Four,, be that 70mm/min, casting temp are that 715 ℃, cooling water pressure are that the melt casting that obtains after the refining in step 3 under the condition of 0.03～0.10MPa becomes the super-hard aluminum alloys ingot casting in casting speed by the semicontinuous casting method; Wherein using tapering in the step 4 semicontinuous casting process is 1: 17 fuse.
Batching is packed in proper order for adding electrolytic copper and aluminium zinc master alloy and immerse electrolytic copper and aluminium zinc master alloy in the melt fully after softening the staying of preparing burden when other in the present embodiment stove, add aluminium manganese master alloy, aluminium chromium hardener and ferro-aluminum master alloy when melt temperature reaches 720 ℃ again, add pure magnesium ingot at last.
Present embodiment is selected different adding opportunitys at the characteristic of different-alloy, has solved the problem of the abundant alloying of each element, and the super-hard aluminum alloys ingot casting yield rate of preparation increases, and reaches 62%.
Embodiment eight: the manufacture method of a kind of super-hard aluminum alloys ingot casting of present embodiment can realize according to the following steps: one, take by weighing batching: the mass percent by element is Cu:1.4%～2.0%, Mn:0.2%～0.6%, Mg:1.8%～2.8%, Cr:0.1%～0.25%, Zn:5.0%～7.2%, Fe: Si≤0.3% :≤0.15%, surplus is Al, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively; Two, batching is loaded to melting in the resistance reverberatory furnace, under 720 ℃ condition,, forms melt from both sides fire door convection agitation 12min; Three, half melt that dips 10mL carries out chemical ingredients and detects from the melt degree of depth, after chemical ingredients in the melt meets elementary composition described in the step 1, import the leaving standstill in the stove of resistance reverberatory furnace, feed argon gas refining 10min, leave standstill 15min then, obtain the melt after the refining; Four,, be that 71.3mm/min, casting temp are that 715 ℃, cooling water pressure are that the melt casting that obtains after the refining in step 3 under the condition of 0.03～0.10MPa becomes the super-hard aluminum alloys ingot casting in casting speed by the semicontinuous casting method; Wherein using tapering in the step 4 semicontinuous casting process is 1: 14 fuse.
The super-hard aluminum alloys ingot casting yield rate of present embodiment preparation has reached 74.1%.
Claims (6)
1. the manufacture method of a super-hard aluminum alloys ingot casting, it is characterized in that described super-hard aluminum alloys ingot casting realizes according to the following steps: one, take by weighing batching: the mass percent by element is Cu:1.4%～2.0%, Mn:0.2%～0.6%, Mg:1.8%～2.8%, Cr:0.1%～0.25%, Zn:5.0%～7.2%, Fe: Si≤0.3% :≤0.15%, surplus is Al, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively; Two, the batching that step 1 the is taken by weighing melting in the resistance reverberatory furnace of packing into from both sides fire door convection agitation 10～15min, forms melt under 700～750 ℃ condition; Three, half melt that dips 5～20mL carries out chemical ingredients and detects from the melt degree of depth, after chemical ingredients in the melt meets elementary composition described in the step 1, melt is imported leaving standstill in the stove of resistance reverberatory furnace, feed argon gas refining 8～15min, leave standstill 10～30min then, obtain the melt after the refining; Four,, be that 70～90mm/min, casting temp are that 710～740 ℃, cooling water pressure are that the melt casting that obtains after the refining in step 3 under the condition of 0.03～0.10MPa becomes the super-hard aluminum alloys ingot casting in casting speed by the semicontinuous casting method; Wherein using tapering in the step 4 semicontinuous casting process is 1: 13～17 fuse.
2. the manufacture method of a kind of super-hard aluminum alloys ingot casting according to claim 1, it is characterized in that in the step 1 that mass percent by element is that Cu:1.6%～1.8%, Mn:0.3%～0.5%, Mg:2.0%～2.5%, Cr:0.15%～0.2%, Zn:5.5%～6.5%, Fe:0.01%～0.28%, Si:0.02～0.12%, surplus are Al, takes by weighing pure magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, aluminium silicon master alloy, ferro-aluminum master alloy, electrolytic copper, aluminium zinc master alloy and remelting aluminium ingot respectively.
3. the manufacture method of a kind of super-hard aluminum alloys ingot casting according to claim 1 and 2 is characterized in that in the step 2 convection agitation 12～14min under 710～740 ℃ condition.
4. the manufacture method of a kind of super-hard aluminum alloys ingot casting according to claim 3 is characterized in that feeding argon gas refining 10～12min in the step 3, leaves standstill 15～25min then.
5. the manufacture method of a kind of super-hard aluminum alloys ingot casting according to claim 4 is characterized in that in the step 4 in casting speed being that 75～85mm/min, casting temp are that 720～730 ℃, cooling water pressure are to be cast as the super-hard aluminum alloys ingot casting under the condition of 0.05～0.08MPa.
6. the manufacture method of a kind of super-hard aluminum alloys ingot casting according to claim 5, it is characterized in that in the step 4 semicontinuous casting process using tapering is 1: 14～16 fuse.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877012A (en) * | 2012-09-13 | 2013-01-16 | 燕山大学 | Method for improving plasticity of super hard aluminum alloy |
| CN102935494A (en) * | 2012-11-13 | 2013-02-20 | 东北轻合金有限责任公司 | Method for producing small-dimension aluminum alloy round ingot |
| CN103639386A (en) * | 2013-12-20 | 2014-03-19 | 西南铝业（集团）有限责任公司 | Aluminium alloy casting method used for bogie axle box body of railway vehicle |
| CN104264015A (en) * | 2014-10-21 | 2015-01-07 | 东北轻合金有限责任公司 | Manufacturing method of high-strength antirust aluminum alloy slab ingot |
| CN104975212A (en) * | 2015-07-17 | 2015-10-14 | 东北轻合金有限责任公司 | Method for manufacturing large high-strength aluminum alloy slab ingot |
| CN105063439A (en) * | 2015-07-29 | 2015-11-18 | 东北轻合金有限责任公司 | Aluminum alloy hollow ingot for nuclear reactor and manufacturing method for aluminum alloy hollow ingot |
| CN105401023A (en) * | 2015-11-14 | 2016-03-16 | 合肥标兵凯基新型材料有限公司 | Preparation method of high-strength aluminum alloy |
| CN107937774A (en) * | 2017-12-26 | 2018-04-20 | 四川欧亚高强铝业有限公司 | Corrosion-resistant extra super duralumin alloy material and production technology |
| CN109457151A (en) * | 2018-12-14 | 2019-03-12 | 烟台南山学院 | A kind of high-strength/tenacity aluminum alloy plate and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877012A (en) * | 2012-09-13 | 2013-01-16 | 燕山大学 | Method for improving plasticity of super hard aluminum alloy |
| CN102935494A (en) * | 2012-11-13 | 2013-02-20 | 东北轻合金有限责任公司 | Method for producing small-dimension aluminum alloy round ingot |
| CN103639386A (en) * | 2013-12-20 | 2014-03-19 | 西南铝业（集团）有限责任公司 | Aluminium alloy casting method used for bogie axle box body of railway vehicle |
| CN104264015A (en) * | 2014-10-21 | 2015-01-07 | 东北轻合金有限责任公司 | Manufacturing method of high-strength antirust aluminum alloy slab ingot |
| CN104264015B (en) * | 2014-10-21 | 2016-06-29 | 东北轻合金有限责任公司 | A kind of manufacture method of high-strength rust-preventing aluminum alloy slab ingot |
| CN104975212A (en) * | 2015-07-17 | 2015-10-14 | 东北轻合金有限责任公司 | Method for manufacturing large high-strength aluminum alloy slab ingot |
| CN104975212B (en) * | 2015-07-17 | 2017-03-22 | 东北轻合金有限责任公司 | Method for manufacturing large high-strength aluminum alloy slab ingot |
| CN105063439A (en) * | 2015-07-29 | 2015-11-18 | 东北轻合金有限责任公司 | Aluminum alloy hollow ingot for nuclear reactor and manufacturing method for aluminum alloy hollow ingot |
| CN105401023A (en) * | 2015-11-14 | 2016-03-16 | 合肥标兵凯基新型材料有限公司 | Preparation method of high-strength aluminum alloy |
| CN107937774A (en) * | 2017-12-26 | 2018-04-20 | 四川欧亚高强铝业有限公司 | Corrosion-resistant extra super duralumin alloy material and production technology |
| CN107937774B (en) * | 2017-12-26 | 2019-10-29 | 四川欧亚高强铝业有限公司 | Corrosion-resistant extra super duralumin alloy material and production technology |
| CN109457151A (en) * | 2018-12-14 | 2019-03-12 | 烟台南山学院 | A kind of high-strength/tenacity aluminum alloy plate and preparation method thereof |
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Application publication date: 20110420 |