CN101736183A - Preparation method of superplastic aluminum alloy plates for track traffic - Google Patents

Preparation method of superplastic aluminum alloy plates for track traffic Download PDF

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Publication number
CN101736183A
CN101736183A CN200910312401A CN200910312401A CN101736183A CN 101736183 A CN101736183 A CN 101736183A CN 200910312401 A CN200910312401 A CN 200910312401A CN 200910312401 A CN200910312401 A CN 200910312401A CN 101736183 A CN101736183 A CN 101736183A
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CN
China
Prior art keywords
aluminum alloy
track traffic
superplastic aluminum
alloy plates
plates
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Pending
Application number
CN200910312401A
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Chinese (zh)
Inventor
吕新宇
冯正海
杨志强
罗建华
魏继承
师雪飞
杨伟刚
刘静
王兆立
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Northeast Light Alloy Co Ltd
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Northeast Light Alloy Co Ltd
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Publication date
Application filed by Northeast Light Alloy Co Ltd filed Critical Northeast Light Alloy Co Ltd
Priority to CN200910312401A priority Critical patent/CN101736183A/en
Publication of CN101736183A publication Critical patent/CN101736183A/en
Pending legal-status Critical Current

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Abstract

A preparation method of superplastic aluminum alloy plates for track traffic relates to the manufacturing method of superplastic aluminum alloy plates. The method solves the problems of bad superplastic formability and bad mechanical properties at high temperature when the existing common aluminum alloy is prepared into plates. The method comprises the steps as follows: (1) smelting and casting alloy ingots; (2) homogenization annealing; (3) hot rolling; (4) intermediate annealing; and (5) secondary rolling the finished product thickness, and then the superplastic aluminum alloy plates for track traffic are obtained after oil scouring and finishing. The plates prepared by the method have good mechanical properties in which the tensile strength is not less than 458N/mm<2>, the non-proportional extension strength is not less than 405N/mm<2> and the elongation percentage after fracture is not less than 6.3%; the plates have good formability performance, the transverse elongation percentage is more than 200% and the longitudinal elongation percentage is more than 250% when the temperature is 500 DEG C; and the surface quality is good after hot forming.

Description

The preparation method of superplastic aluminum alloy plates for track traffic
Technical field
The present invention relates to the manufacture method of superplastic aluminum alloy plates for track traffic.
Background technology
The lightweight of train is the first-selected condition that improves train speed in the development of track traffic, can alleviate deadweight, reduces operating resistance, cuts down the consumption of energy etc.The superplastic aluminum alloy prepares the compartment in the widespread use of track traffic complicated shape moulding industrial circle with it, can alleviate deadweight, and can increase the weight-carrying capacity in compartment.
At present, common aluminum alloy is after being prepared into sheet material, and mechanical property is bad, shows as: tensile strength is low (only to be 400~450N/mm 2), the disproportional extension strength is low (only to be 360~405N/mm 2), elongation after fracture low (only being 2~6.3%), sheet material high-temperature molding performance is bad, and horizontal expansion rate below 200% in the time of 500 ℃, longitudinal extension rate be below 250%, hot forming rear surface poor quality.
Summary of the invention
The present invention seeks in order to solve existing common aluminum alloy after being prepared into sheet material, the problem that the high temperature superplastic formation is not good and mechanical property is bad, and the manufacture method of superplastic aluminum alloy plates for track traffic is provided.
The preparation method of superplastic aluminum alloy plates for track traffic, sheet material is grouped into by following one-tenth by weight: Si≤0.10%, Fe≤0.12%, Cu<0.05%, Mn:0.50%~0.90%, Mg:4.30%~4.90%, Cr:0.05%~0.20%, Zn<0.10%, Ti:0.02%~0.08%, Zr:0.05%~0.20%, V:0.01%~0.10%, single impurity≤0.05% adds up to impurity≤0.15%, and all the other are Al; Manufacture method realizes by following step: one, melting and casting alloy cast ingot; Two, alloy cast ingot carries out homogenizing annealing, at 390~405 ℃ of 6h that anneal down, then at 535~545 ℃ of 36h that anneal down; Three, alloy cast ingot carries out hot rolling, 620 ℃ of chain type process furnace constant temperatures, and be 5~8h heat-up time, and tapping temperature is 450~480 ℃, and residing time in furnace is 18~24h, and being hot-rolled down to sheet metal thickness is 7.0 ± 0.2mm; Four, process annealing, 350 ℃ of box-type furnace constant temperatures change 275 ℃ of constant temperatures after the high point of metal temperature reaches 230~240 ℃, are incubated 1h after end point reaches 255 ℃, the not blowing-out that the has a power failure during insulation air cooling of coming out of the stove; Five, double mill product thickness after cleaning oil and finishing, promptly gets superplastic aluminum alloy plates for track traffic.
The mechanical property of the sheet material of the present invention's preparation is good, shows as tensile strength and is not less than 458N/mm 2, the disproportional extension strength is not less than 405 N/mm 2, elongation after fracture is not less than 6.3%, and sheet material high-temperature molding performance is good, and the horizontal expansion rate is more than 200% in the time of 500 ℃, and the longitudinal extension rate is more than 250%, and hot forming rear surface quality is good.
Embodiment
Embodiment one: the preparation method of present embodiment superplastic aluminum alloy plates for track traffic, sheet material is grouped into by following one-tenth by weight: Si≤0.10%, Fe≤0.12%, Cu<0.05%, Mn:0.50%~0.90%, Mg:4.30%~4.90%, Cr:0.05%~0.20%, Zn<0.10%, Ti:0.02%~0.08%, Zr:0.05%~0.20%, V:0.01%~0.10%, single impurity≤0.05% adds up to impurity≤0.15%, and all the other are Al; Manufacture method realizes by following step: one, melting and casting alloy cast ingot; Two, alloy cast ingot carries out homogenizing annealing, at 390~405 ℃ of 6h that anneal down, then at 535~545 ℃ of 36h that anneal down; Three, alloy cast ingot carries out hot rolling, 620 ℃ of chain type process furnace constant temperatures, and be 5~8h heat-up time, and tapping temperature is 450~480 ℃, and residing time in furnace is 18~24h, and being hot-rolled down to sheet metal thickness is 7.0 ± 0.2mm; Four, process annealing, 350 ℃ of box-type furnace constant temperatures change 275 ℃ of constant temperatures after the high point of metal temperature reaches 230~240 ℃, are incubated 1h after end point reaches 255 ℃, the not blowing-out that the has a power failure during insulation air cooling of coming out of the stove; Five, double mill product thickness after cleaning oil and finishing, promptly gets superplastic aluminum alloy plates for track traffic.
Hot rolling in the present embodiment step 3 is carried out according to the regulation of table 1.
Table 1
Embodiment one: what present embodiment and embodiment one were different is melting and casting alloy cast ingot in the step 1: raw material is selected rafifinal for use, requires prepurging, adopts argon-chlorine mixed gas to carry out refining in the stove, and stove adopts online degassing and filtration outward.Other step and parameter are identical with embodiment one.
Embodiment three: present embodiment and embodiment two are different is at 395 ℃ of annealing 6h down, then at 540 ℃ of annealing 36h down in the step 2.Other step and parameter are identical with embodiment two.
Embodiment four: present embodiment and embodiment three are different is 620 ℃ of chain type process furnace constant temperatures in the step 3, and be 6h heat-up time, and tapping temperature is 460 ℃, and residing time in furnace is 22h, and being hot-rolled down to sheet metal thickness is 7.0 ± 0.1mm.Other step and parameter are identical with embodiment three.
Embodiment five: present embodiment and embodiment four are different is 350 ℃ of box-type furnace constant temperatures in the step 4, changes 275 ℃ of constant temperatures after the high point of metal temperature reaches 230~240 ℃.Other step and parameter are identical with embodiment four.
Embodiment six: the preparation method of present embodiment superplastic aluminum alloy plates for track traffic, sheet material is grouped into by following one-tenth by weight: Si≤0.10%, Fe≤0.12%, Cu<0.05%, Mn:0.50%~0.90%, Mg:4.30%~4.90%, Cr:0.05%~0.20%, Zn<0.10%, Ti:0.02%~0.08%, Zr:0.05%~0.20%, V:0.01%~0.10%, single impurity≤0.05% adds up to impurity≤0.15%, and all the other are Al; Manufacture method realizes by following step: one, melting and casting alloy cast ingot; Two, alloy cast ingot carries out homogenizing annealing, at 400 ℃ of 6h that anneal down, then at 545 ℃ of 36h that anneal down; Three, alloy cast ingot carries out hot rolling, 620 ℃ of chain type process furnace constant temperatures, and be 8h heat-up time, and tapping temperature is 470 ℃, and residing time in furnace is 22h, and being hot-rolled down to sheet metal thickness is 7.0mm; Four, process annealing, 350 ℃ of box-type furnace constant temperatures change 275 ℃ of constant temperatures after the high point of metal temperature reaches 235 ℃, are incubated 1h after end point reaches 255 ℃, the not blowing-out that the has a power failure during insulation air cooling of coming out of the stove; Five, double mill product thickness after cleaning oil and finishing, promptly gets superplastic aluminum alloy plates for track traffic.
The mechanical property of the sheet material of present embodiment preparation is good, shows as tensile strength and is not less than 458N/mm 2, the disproportional extension strength is not less than 405N/mm 2, elongation after fracture is not less than 6.3%, and sheet material high-temperature molding performance is good, and the horizontal expansion rate is more than 200% in the time of 500 ℃, and the longitudinal extension rate is more than 250%, and hot forming rear surface quality is good.

Claims (5)

1. the preparation method of superplastic aluminum alloy plates for track traffic, sheet material is grouped into by following one-tenth by weight: Si≤0.10%, Fe≤0.12%, Cu<0.05%, Mn:0.50%~0.90%, Mg:4.30%~4.90%, Cr:0.05%~0.20%, Zn<0.10%, Ti:0.02%~0.08%, Zr:0.05%~0.20%, V:0.01%~0.10%, single impurity≤0.05% adds up to impurity≤0.15%, and all the other are Al; The manufacture method that it is characterized in that it realizes by following step: one, melting and casting alloy cast ingot; Two, alloy cast ingot carries out homogenizing annealing, at 390~405 ℃ of 6h that anneal down, then at 535~545 ℃ of 36h that anneal down; Three, alloy cast ingot carries out hot rolling, 620 ℃ of chain type process furnace constant temperatures, and be 5~8h heat-up time, and tapping temperature is 450~480 ℃, and residing time in furnace is 18~24h, and being hot-rolled down to sheet metal thickness is 7.0 ± 0.2mm; Four, process annealing, 350 ℃ of box-type furnace constant temperatures change 275 ℃ of constant temperatures after the high point of metal temperature reaches 230~240 ℃, are incubated 1h after end point reaches 255 ℃, the not blowing-out that the has a power failure during insulation air cooling of coming out of the stove; Five, double mill product thickness after cleaning oil and finishing, promptly gets superplastic aluminum alloy plates for track traffic.
2. the preparation method of superplastic aluminum alloy plates for track traffic according to claim 1, it is characterized in that melting and casting alloy cast ingot in the step 1: raw material is selected rafifinal for use, require prepurging, adopt argon-chlorine mixed gas to carry out refining in the stove, stove adopts online degassing and filtration outward.
3. the preparation method of superplastic aluminum alloy plates for track traffic according to claim 2 is characterized in that in the step 2 at 395 ℃ of 6h that anneal down, then at 540 ℃ of 36h that anneal down.
4. the preparation method of superplastic aluminum alloy plates for track traffic according to claim 3, it is characterized in that in the step 3 620 ℃ of chain type process furnace constant temperatures, be 6h heat-up time, and tapping temperature is 460 ℃, residing time in furnace is 22h, and being hot-rolled down to sheet metal thickness is 7.0 ± 0.1mm.
5. the preparation method of superplastic aluminum alloy plates for track traffic according to claim 4 is characterized in that in the step 4 350 ℃ of box-type furnace constant temperatures, changes 275 ℃ of constant temperatures after the high point of metal temperature reaches 230~240 ℃.
CN200910312401A 2009-12-28 2009-12-28 Preparation method of superplastic aluminum alloy plates for track traffic Pending CN101736183A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914710A (en) * 2010-09-16 2010-12-15 东北轻合金有限责任公司 Aluminum alloy sheet for high-speed train structure and manufacture thereof
CN102489512A (en) * 2011-12-14 2012-06-13 西南铝业(集团)有限责任公司 Production method for marine aluminum alloy plate
CN103014385A (en) * 2012-12-03 2013-04-03 滁州迪蒙德模具制造有限公司 Processing technology for high-abrasion-resistance aluminium alloy foaming mould casting
CN103614610A (en) * 2013-11-28 2014-03-05 太原理工大学 Method for preparing weather-resisting steel ingot
CN104694801A (en) * 2015-03-20 2015-06-10 东北轻合金有限责任公司 Al-Mg-Sc-Zr aluminum alloy plate and manufacturing method thereof
CN105200285A (en) * 2015-10-26 2015-12-30 东北轻合金有限责任公司 Aluminium alloy plate with superplasticity and manufacturing method thereof
CN105755330A (en) * 2016-05-03 2016-07-13 贵州航天风华精密设备有限公司 Superplasticity aluminum alloy plate and preparation method thereof
CN105861896A (en) * 2016-05-18 2016-08-17 太仓鸿鑫精密压铸有限公司 Manufacturing method for aluminum alloy material for automobile
CN106591751A (en) * 2016-12-30 2017-04-26 西南铝业(集团)有限责任公司 2060 alloy intermediate annealing process method
CN109433898A (en) * 2018-09-28 2019-03-08 北京航星机器制造有限公司 A kind of rail traffic aluminum alloy sheet metal component and its superplastic forming method
EP3569721A1 (en) * 2018-05-18 2019-11-20 Aleris Rolled Products Germany GmbH Method of manufacturing an al-mg-mn alloy plate product

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101914710B (en) * 2010-09-16 2012-01-11 东北轻合金有限责任公司 Manufacture method of aluminum alloy sheet for high-speed train structure
CN101914710A (en) * 2010-09-16 2010-12-15 东北轻合金有限责任公司 Aluminum alloy sheet for high-speed train structure and manufacture thereof
CN102489512A (en) * 2011-12-14 2012-06-13 西南铝业(集团)有限责任公司 Production method for marine aluminum alloy plate
CN103014385B (en) * 2012-12-03 2016-01-06 滁州迪蒙德模具制造有限公司 The complete processing of high abrasion aluminium alloy foaming mould foundry goods
CN103014385A (en) * 2012-12-03 2013-04-03 滁州迪蒙德模具制造有限公司 Processing technology for high-abrasion-resistance aluminium alloy foaming mould casting
CN103614610A (en) * 2013-11-28 2014-03-05 太原理工大学 Method for preparing weather-resisting steel ingot
CN103614610B (en) * 2013-11-28 2015-06-17 太原理工大学 Method for preparing weather-resisting steel ingot
CN104694801A (en) * 2015-03-20 2015-06-10 东北轻合金有限责任公司 Al-Mg-Sc-Zr aluminum alloy plate and manufacturing method thereof
CN105200285A (en) * 2015-10-26 2015-12-30 东北轻合金有限责任公司 Aluminium alloy plate with superplasticity and manufacturing method thereof
CN105755330A (en) * 2016-05-03 2016-07-13 贵州航天风华精密设备有限公司 Superplasticity aluminum alloy plate and preparation method thereof
CN105861896A (en) * 2016-05-18 2016-08-17 太仓鸿鑫精密压铸有限公司 Manufacturing method for aluminum alloy material for automobile
CN106591751A (en) * 2016-12-30 2017-04-26 西南铝业(集团)有限责任公司 2060 alloy intermediate annealing process method
EP3569721A1 (en) * 2018-05-18 2019-11-20 Aleris Rolled Products Germany GmbH Method of manufacturing an al-mg-mn alloy plate product
CN109433898A (en) * 2018-09-28 2019-03-08 北京航星机器制造有限公司 A kind of rail traffic aluminum alloy sheet metal component and its superplastic forming method

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Open date: 20100616