CN102505086B - Method for manufacturing aluminum alloy profiles for side walls of rail transit vehicles - Google Patents
Method for manufacturing aluminum alloy profiles for side walls of rail transit vehicles Download PDFInfo
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- CN102505086B CN102505086B CN201110460072.0A CN201110460072A CN102505086B CN 102505086 B CN102505086 B CN 102505086B CN 201110460072 A CN201110460072 A CN 201110460072A CN 102505086 B CN102505086 B CN 102505086B
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Abstract
The invention discloses a method for manufacturing aluminum alloy profiles for side walls of rail transit vehicles, which includes steps of a, billet batching, b, billet smelting, c, billet casting, d, homogenizing, e, billet surface treatment, f, billet heating, g, mould heating, h, extruding, i, online quenching, and j, profile aging. Parameters of the processing steps are controlled well. Larger sections and better comprehensive properties of aluminum profiles can be achieved, requirements of the aluminum profiles on vehicle use are met, vehicle manufacturing cost is lowered, vehicle weight can be reduced, and the shortages of heavy weight, high maintenance difficulty, high auxiliary equipment cost and the like of the steel-structured vehicles are overcome. In addition, energy consumption in manufacture by the method is only one fifth of that in stainless manufacture, water consumption is only one fifth of that in manufacture of stainless steel cars, and weight of the cars is reduced by one third. Proof strength of non-proportional extension can reach more than 255MPa, tensile strength can reach more than 300MPa, and elongation after facture can reach more than 11%.
Description
Technical field
The present invention relates to aluminium alloy and manufacture field, relate in particular to a kind of manufacture method of aluminum alloy profiles for side walls of rail transit vehicles.
Background technology
In the epoch of high-speed railway fast development, during the last ten years, inquiring into both at home and abroad about in Development of High Speed Railway always, is which better as body bottom material to use aluminium alloy and stainless steel? by test, find to adopt aluminium alloy extrusions tentatively to meet the demands.But in prior art, the section of aluminum alloy profiles for side walls of rail transit vehicles is smaller, this just causes weld seam more, and welding distortion increases, assembling difficulty is large; And welding can cause degradation, more weld is comprehended the decline that causes whole car body performance.And the technological process of production that directly causes profiles for side walls of rail transit vehicles is comparatively complicated, production efficiency is told somebody what one's real intentions are, the production cycle is long, production cost is higher.Producing large section section bar is the effective ways that solve an above-mentioned difficult problem, and still, the production difficulty of large section section bar is larger equally, in process of production, if process selection is improper, can make section bar produce a lot of unnecessary defects.
For above-mentioned deficiency, need to, from improving large section type material performance perspective, again provide a kind of aluminium alloy manufacturing process, to solve the technical barrier existing in prior art.
Summary of the invention
In view of this, the object of this invention is to provide a kind of manufacture method of aluminum alloy profiles for side walls of rail transit vehicles, the aluminum alloy profiles for side walls of rail transit vehicles of producing by present method is in guaranteed performance, can simplification of flowsheet, enhance productivity, shorten the production cycle, reduce production costs, there is obvious economic benefit.
The object of the invention is to be achieved through the following technical solutions: a kind of manufacture method of aluminum alloy profiles for side walls of rail transit vehicles, comprises the following steps:
A, casting rod batching: adopt 6005A alloy, element mass percent meets following requirement;
B, casting rod melting: batching is dropped into successively in smelting furnace and carries out melting, in stove, be controlled at 720 ℃-760 ℃, and use flux to carry out refining covering.; Feed intake after 30min-60min, while there is aluminium water in stove, start to stir, again through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature is standing maintenance 20-30min under 730 ℃ of-750 ℃ of conditions, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
C, casting rod casting: adopt cunning casting, casting temp is controlled at 680 ℃-720 ℃, and casting speed is controlled at 26-42mm/min, casting cooling water flow is controlled at 950-1350L/min;
D, homogenizing processing: homogenizing processing will be carried out at homogeneous furnace, temperature is incubated 10 hours between 550 ℃-560 ℃;
E, casting rod surface treatment: casting rod surface railway carriage 10mm, the roughness Ra of appearance should be not less than 6.3 μ m
F, casting rod heating: casting rod is heated to be gradient-heated head, the tail temperature difference between 10 ℃-20 ℃ in excellent stove, casting rod Heating temperature in stove is 510 ± 10 ℃ for controlling;
G, mold heated: mould is incubated 3-8 hour with 500 ± 10 ℃ in mould heating furnace;
H, extrusion production: after casting rod, mold heated complete, push, extrusion speed is 1.3 ± 0.3m/min;
I, press quenching: during extruded section model outlet, its temperature is not less than 500 ℃ and enters quench zone, quenching mode is chosen as high wind and coordinates water spray quenching;
J, section bar timeliness: after extruding finishes, within 8 hours, carry out timeliness, aging temp is 175 ℃, and soaking time is 8h, can obtain required aluminum alloy profiles for side walls of rail transit vehicles.
Further, in step c, casting speed is controlled at 33mm/min;
Further, in step h, extrusion speed is 1.3m/min.
Beneficial effect of the present invention: aluminum alloy profiles for side walls of rail transit vehicles manufacture method of the present invention, can make aluminium section bar obtain the over-all properties of larger section and Geng Jia, meet the demand of aluminum profile car body use and the manufacturing cost of reduction car body, alleviate the weight of car body itself, the shortcomings such as elimination steel construction car body quality is large, and maintenance difficulty is large, utility appliance expense height, and energy consumption of the present invention is only that stainless 1/5, water consumption is only 1/5 of stainless steel compartment, compartment loss of weight reaches 1/3; By present method, produce aluminum alloy profiles for side walls of rail transit vehicles, its Proof strength of non-proportional is that 255MPa is above, tensile strength is that 300MPa is above, elongation after fracture is more than 11%; Meanwhile, can simplification of flowsheet, enhance productivity, shorten the production cycle, reduce production costs, there is obvious economic benefit.This section bar width can reach 542 ± 2mm, and thickness can reach 42 ± 0.4mm; The lateral performance of its extruding position while welding can reach without extruding the more than 90% of position while welding.
Accompanying drawing explanation
Accompanying drawing 1 is the manufacturing process flow diagram of aluminum alloy profiles for side walls of rail transit vehicles of the present invention.
Embodiment
Embodiment 1, the manufacture method of the aluminum alloy profiles for side walls of rail transit vehicles of the present embodiment, comprises the following steps:
A, casting rod batching: adopt 6005A alloy, element mass percent meets following requirement;
| Element | Si | Mg | Fe | Cu | Mn | Cr | Ti | Zn | Other | Al |
| Content | 0.75 | 0.45 | 0.30 | 0.20 | 0.30 | 0.10 | 0.10 | 0.10 | 0.10 | All the other |
B, casting rod melting: batching is dropped into successively in smelting furnace and carries out melting, in stove, be controlled at 760 ℃, and use flux to carry out refining covering; Feed intake after 30min, while there is aluminium water in stove, start to stir, again through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature is standing maintenance 20min under 750 ℃ of conditions, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
C, casting rod casting: adopt cunning casting, casting temp is controlled at 720 ℃, and casting speed is controlled at 26mm/min, casting cooling water flow is controlled at 1350L/min;
D, homogenizing processing: homogenizing processing will be carried out at homogeneous furnace, temperature was 550 ℃ of insulations 10 hours;
E, casting rod surface treatment: casting rod surface railway carriage 10mm, the roughness Ra of appearance should be not less than 6.3 μ m; So that the defects such as removal casting rod surface and oil contaminant, machinery are damaged, surface segregation layer;
F, casting rod heating: casting rod is heated to be gradient-heated head, the tail temperature difference at 20 ℃ in excellent stove, casting rod Heating temperature in stove is 500 ℃ for controlling;
G, mold heated: mould is incubated 8 hours with 490 ℃ in mould heating furnace;
H, extrusion production: after casting rod, mold heated complete, push, extrusion speed is 1.0m/min;
I, press quenching: during extruded section model outlet, its temperature is not less than 500 ℃ and enters quench zone, quenching mode is chosen as high wind and coordinates water spray quenching; Guarantee to obtain high oversaturated sosoloid in matrix;
J, section bar timeliness: after extruding finishes, within 8 hours, carry out timeliness, aging temp is 175 ℃, and soaking time is 8h, can obtain required aluminum alloy profiles for side walls of rail transit vehicles.
Embodiment 2, the manufacture method of the aluminum alloy profiles for side walls of rail transit vehicles of the present embodiment, comprises the following steps:
A, casting rod batching: adopt 6005A alloy, element mass percent meets following requirement;
| Element | Si | Mg | Fe | Cu | Mn | Cr | Ti | Zn | Other | Al |
| Content | 0.85 | 0.35 | 0.25 | 0.15 | 0.30 | 0.10 | 0.10 | 0.10 | 0.10 | All the other |
B, casting rod melting: batching is dropped into successively in smelting furnace and carries out melting, in stove, be controlled at 720 ℃, and use flux to carry out refining covering; Feed intake after 60min, while there is aluminium water in stove, start to stir, again through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature is standing maintenance 30min under 730 ℃ of conditions, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
C, casting rod casting: adopt cunning casting, casting temp is controlled at 680 ℃, and casting speed is controlled at 42mm/min, casting cooling water flow is controlled at 950L/min;
D, homogenizing processing: homogenizing processing will be carried out at homogeneous furnace, temperature was 560 ℃ of insulations 10 hours;
E, casting rod surface treatment: casting rod surface railway carriage 10mm, the roughness Ra of appearance should be not less than 6.3 μ m; So that the defects such as removal casting rod surface and oil contaminant, machinery are damaged, surface segregation layer;
F, casting rod heating: casting rod is heated to be gradient-heated head, the tail temperature difference at 10 ℃ in excellent stove, casting rod Heating temperature in stove is 520 ℃ for controlling;
G, mold heated: mould is incubated 3 hours with 510 ℃ in mould heating furnace;
H, extrusion production: after casting rod, mold heated complete, push, extrusion speed is 1.6m/min;
I, press quenching: during extruded section model outlet, its temperature is not less than 500 ℃ and enters quench zone, quenching mode is chosen as high wind and coordinates water spray quenching; Guarantee to obtain high oversaturated sosoloid in matrix;
J, section bar timeliness: after extruding finishes, within 8 hours, carry out timeliness, aging temp is 175 ℃, and soaking time is 8h, can obtain required aluminum alloy profiles for side walls of rail transit vehicles.
Embodiment 3, the manufacture method of the aluminum alloy profiles for side walls of rail transit vehicles of the present embodiment, comprises the following steps:
A, casting rod batching: adopt 6005A alloy, element mass percent meets following requirement;
| Element | Si | Mg | Fe | Cu | Mn | Cr | Ti | Zn | Other | Al |
| Content | 0.8 | 0.4 | 0.30 | 0.15 | 0.25 | 0.08 | 0.08 | 0.09 | 0.09 | All the other |
B, casting rod melting: batching is dropped into successively in smelting furnace and carries out melting, in stove, be controlled at 740 ℃, and use flux to carry out refining covering; Feed intake after 45min, while there is aluminium water in stove, start to stir, again through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature is standing maintenance 25min under 740 ℃ of conditions, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
C, casting rod casting: adopt cunning casting, casting temp is controlled at 700 ℃, and casting speed is controlled at 33mm/min, casting cooling water flow is controlled at 1100L/min;
D, homogenizing processing: homogenizing processing will be carried out at homogeneous furnace, temperature was 550 ℃ of insulations 10 hours;
E, casting rod surface treatment: casting rod surface railway carriage 10mm, the roughness Ra of appearance should be not less than 6.3 μ m; So that the defects such as removal casting rod surface and oil contaminant, machinery are damaged, surface segregation layer;
F, casting rod heating: casting rod is heated to be gradient-heated head, the tail temperature difference at 15 ℃ in excellent stove, casting rod Heating temperature in stove is 510 ℃ for controlling;
G, mold heated: mould is incubated 5 hours with 500 ℃ in mould heating furnace;
H, extrusion production: after casting rod, mold heated complete, push, extrusion speed is 1.3m/min;
I, press quenching: during extruded section model outlet, its temperature is not less than 500 ℃ and enters quench zone, quenching mode is chosen as high wind and coordinates water spray quenching; Guarantee to obtain high oversaturated sosoloid in matrix;
J, section bar timeliness: after extruding finishes, within 8 hours, carry out timeliness, aging temp is 175 ℃, and soaking time is 8h, can obtain required aluminum alloy profiles for side walls of rail transit vehicles.
The aluminum alloy profiles for side walls of rail transit vehicles of producing by above-mentioned three embodiment, its energy consumption be only that stainless 1/5, water consumption is only 1/5 of stainless steel compartment, compartment loss of weight reaches 1/3; By present method, produce aluminum alloy profiles for side walls of rail transit vehicles, its Proof strength of non-proportional is that 255MPa is above, tensile strength is that 300MPa is above, elongation after fracture is more than 11%; Meanwhile, can simplification of flowsheet, enhance productivity, shorten the production cycle, reduce production costs, there is obvious economic benefit.This section bar width can reach 542 ± 2mm, and thickness can reach 42 ± 0.4mm; The lateral performance of its extruding position while welding can reach without extruding the more than 90% of position while welding.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, but those of ordinary skill in the art modifies or is equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (3)
1. a manufacture method for aluminum alloy profiles for side walls of rail transit vehicles, is characterized in that: comprise the following steps:
A, casting rod batching: adopt 6005A alloy, element mass percent meets following requirement;
B, casting rod melting: batching is dropped into successively in smelting furnace and carries out melting, in stove, be controlled at 720 ℃-760 ℃, and use flux to carry out refining covering; Feed intake after 30min-60min, while there is aluminium water in stove, start to stir, again through refining, skimming obtains after qualified composition, aluminium liquid is injected to holding furnace from smelting furnace, furnace temperature is standing maintenance 20-30min under 730 ℃ of-750 ℃ of conditions, then utilizes argon gas to take the hydrogen in aluminium liquid and fine impurities to surface, thereby reduces the hydrogen richness in aluminium liquid;
C, casting rod casting: adopt cunning casting, casting temp is controlled at 680 ℃-720 ℃, and casting speed is controlled at 26-42mm/min, casting cooling water flow is controlled at 950-1350L/min;
D, homogenizing processing: homogenizing processing will be carried out at homogeneous furnace, temperature is incubated 10 hours between 550 ℃-560 ℃;
E, casting rod surface treatment: casting rod surface railway carriage 10mm, the roughness Ra of appearance should be not less than 6.3 μ m;
F, casting rod heating: casting rod is heated to be gradient-heated in excellent stove, casting rod head, the tail temperature difference are between 10 ℃-20 ℃, and casting rod Heating temperature in stove is 510 ± 10 ℃ for controlling;
G, mold heated: mould is incubated 3-8 hours with 500 ± 10 ℃ in mould heating furnace;
H, extrusion production: after casting rod, mold heated complete, push, extrusion speed is 1.3 ± 0.3m/min; I, press quenching: during extruded section model outlet, its temperature is not less than 500 ℃ and enters quench zone, quenching mode is chosen as high wind and coordinates water spray quenching;
J, section bar timeliness: after extruding finishes, within 8 hours, carry out timeliness, aging temp is 175 ℃, and soaking time is 8h, can obtain required aluminum alloy profiles for side walls of rail transit vehicles.
2. the manufacture method of aluminum alloy profiles for side walls of rail transit vehicles according to claim 1, is characterized in that: in step c, casting speed is controlled at 33mm/min.
3. the manufacture method of aluminum alloy profiles for side walls of rail transit vehicles according to claim 1 and 2, is characterized in that: in step h, extrusion speed is 1.3m/min.
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| CN201110460072.0A CN102505086B (en) | 2011-12-31 | 2011-12-31 | Method for manufacturing aluminum alloy profiles for side walls of rail transit vehicles |
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| CN103725905A (en) * | 2013-12-17 | 2014-04-16 | 芜湖万润机械有限责任公司 | Preparation method of aluminium alloy section with high abrasion resistance |
| CN103710586A (en) * | 2013-12-17 | 2014-04-09 | 芜湖万润机械有限责任公司 | Preparation method of high-strength heat-resistant aluminum alloy profile |
| CN106435301A (en) * | 2016-11-18 | 2017-02-22 | 山东裕航特种合金装备有限公司 | Production method of aluminum alloy car body keel frame material of new energy passenger car |
| CN107008763A (en) * | 2017-05-22 | 2017-08-04 | 新疆源盛科技发展有限公司 | A kind of extrusion process of aluminium alloy extrusions |
| CN107488799A (en) * | 2017-08-14 | 2017-12-19 | 山东南山铝业股份有限公司 | A kind of automobile connecting plate aluminium alloy extrusions and its manufacture method |
| CN107326227A (en) * | 2017-08-14 | 2017-11-07 | 山东南山铝业股份有限公司 | Rail transit vehicle body skirtboard aluminium alloy extrusions and its manufacture method |
| CN108220843B (en) * | 2018-01-02 | 2020-04-17 | 丛林铝业科技(山东)有限责任公司 | Grading homogenization process of 6005A aluminum alloy |
| CN108893661B (en) * | 2018-07-19 | 2020-07-28 | 中铝萨帕特种铝材（重庆）有限公司 | Wide thin-wall 6-series aluminum alloy section for high-speed motor train unit and preparation method thereof |
| CN109487128B (en) * | 2018-12-12 | 2020-04-14 | 山东南山铝业股份有限公司 | Aluminum alloy section for roof side beam of rail transit vehicle body and manufacturing method thereof |
| CN110714146A (en) * | 2019-11-01 | 2020-01-21 | 安徽鑫铂铝业股份有限公司 | Processing method of aluminum alloy section for rail transit |
| CN111069321A (en) * | 2019-11-22 | 2020-04-28 | 辽宁忠旺集团有限公司 | Aluminum alloy large-width thin-wall track car body floor profile extrusion process |
| CN111304499B (en) * | 2019-11-30 | 2021-10-08 | 吴江市新申铝业科技发展有限公司 | Improved 6005A aluminum alloy section and manufacturing process thereof |
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| DE102004022817A1 (en) * | 2004-05-08 | 2005-12-01 | Erbslöh Ag | Decorative anodizable, easily deformable, mechanically highly loadable aluminum alloy, process for its production and aluminum product made from this alloy |
| CN101597707A (en) * | 2009-07-13 | 2009-12-09 | 中南大学 | A kind of Al-Mg-Si-Cu alloy and preparation method thereof |
| CN101935784B (en) * | 2010-08-30 | 2011-11-23 | 佛山市鸿金源铝业制品有限公司 | Aluminium material for contact nets on rapid transit railway and manufacturing method thereof |
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