CN105256193A - Process for avoiding coarse-grain rings of 6061 aluminum alloy bars and rods - Google Patents
Process for avoiding coarse-grain rings of 6061 aluminum alloy bars and rods Download PDFInfo
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- CN105256193A CN105256193A CN201510861771.4A CN201510861771A CN105256193A CN 105256193 A CN105256193 A CN 105256193A CN 201510861771 A CN201510861771 A CN 201510861771A CN 105256193 A CN105256193 A CN 105256193A
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Abstract
The invention discloses a process for avoiding coarse-grain rings of 6061 aluminum alloy bars and rods, and belongs to the technical field of aluminum alloy machining. The process includes the steps of alloy component optimization, cast bar heating, the extrusion process, online quenching, stretch flattening and artificial aging. Chemical components of optimized alloy components include 0.60-0.65% of Si, 0.20% of Fe, 0.19-0.24% of Cu, 0.05-0.10% of Mn, 0.90-0.95% of Mg, 0.25-0.30% of Cr, 0.15% of Zn, 0.10% of Ti, 0.15% of other substances, and the balance Al. Double-hole die extrusion is adopted for the extrusion process. By means of the process, extruded aluminum alloy products can be free of coarse-grain ring tissue defects, the mechanics, fatigue and other physical performance of materials are greatly improved, the bearing capacity and use safety of materials are improved, the service life of materials is prolonged, and use risks of materials are reduced.
Description
Technical field
The invention belongs to aluminum alloy processing technology field, be specifically related to a kind of technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed.
Background technology
6061 aluminium alloys belong to Al-Mg-Si system alloy, have medium tenacity, good plasticity, and excellent weldability and good erosion resistance.In 6061 rods and bars of aluminium alloy extruding, often occur coarse grain ring, this is a kind of important tissue defects in Al-alloy products, the physicalies such as the mechanical property of material, fatigue strength can be caused obviously to decline, affect the normal use of material, cause application risk.
For the problems referred to above, be necessary to be optimized improvement to the technique of existing 6061 rodss and bars of aluminium alloy, avoid the generation of the tissue defects such as coarse grain ring, improve the physicals level such as mechanical property, fatigue strength of material.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed, easily occur that the tissue defects such as coarse grain ring cause material physical property to decline to solve in prior art, affect the normal use of material, cause the problem of application risk.
The object of the invention is to be achieved through the following technical solutions:
Avoid the technique that 6061 rods and bars of aluminium alloy coarse grain rings are formed, processing step comprises alloying constituent optimization, casting rod heating, extrusion process, press quenching, tension leveling and artificial aging, chemical composition after alloying constituent optimization: Si:0.60%-0.65%, Fe:0.20%, Cu:0.19%-0.24%, Mn:0.05%-0.10%, Mg:0.90%-0.95%, Cr:0.25%-0.30%, Zn:0.15%, Ti:0.10%, other: add up to 0.15%, Al: surplus, described extrusion process adopts double hole mould extruding.
Further, in casting rod heating process, casting rod temperature is controlled within the scope of 485 ~ 515 DEG C.
Further, casting rod temperature controls at 490 DEG C.
Further, before extrusion process, also comprise mould and container heating, its temperature controls respectively within the scope of 440 ~ 460 DEG C and 440 ~ 460 DEG C.
Further, the temperature of mould and container all controls at 450 DEG C.
Further, in extrusion process, extrusion speed controls within the scope of 5.5 ~ 6.5m/min; Carry out wearing water treatment in extruded section model outlet.
Further, extrusion speed is 6m/min.
Further, carry out tension leveling operation after extrusion process in 24h, extensibility is within the scope of 0.5-1.5%.
Further, artificially aged temperature is 175 DEG C, and aging time is 8h.
The invention has the beneficial effects as follows:
The present invention can make the alloy product of extruding without coarse grain ring tissue defects, property indices all reaches Standard, its specific requirement is: yield strength >=240Mpa, tensile strength >=260Mpa, elongation >=9%, result by this processing method obtains: yield strength >=300MPa, tensile strength >=335MPa, elongation >=13%, significantly improve the physicalies such as the mechanics of material, fatigue, improve the supporting capacity of material, work-ing life and safety in utilization, reduce the application risk of material.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, or can be instructed from the practice of the present invention.Target of the present invention and other advantages can be realized by specification sheets below and obtain.
Accompanying drawing explanation
Nothing
Embodiment
Below will be described in detail the preferred embodiments of the present invention.Should be appreciated that preferred embodiment only in order to the present invention is described, instead of in order to limit the scope of the invention.
First embodiment
The technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed of the present embodiment, concrete processing step comprises alloying constituent optimization, casting rod heats, extrusion process, press quenching, tension leveling and artificial aging, chemical composition after alloying constituent optimization: Si:0.60%-0.65%, Fe:0.20%, Cu:0.19%-0.24%, Mn:0.05%-0.10%, Mg:0.90%-0.95%, Cr:0.25%-0.30%, Zn:0.15%, Ti:0.10%, other: add up to 0.15%, Al: surplus, described extrusion process adopts double hole mould extruding, with double hole mould, reduce extrusion ratio, reduce aluminium ingot deflection in extrusion process, suppress the formation of coarse grain, improve production efficiency simultaneously.
As the improvement of the present embodiment, in casting rod heating process, casting rod temperature is controlled within the scope of 485 ~ 515 DEG C, more excellent, casting rod temperature is controlled within the scope of 490 DEG C, while can quenching temperature being met, avoid that temperature is too high makes grain growth, form coarse grain ring.
As the improvement of the present embodiment, before extrusion process, also comprise mould and container heating, its temperature controls respectively within the scope of 440 ~ 460 DEG C and 440 ~ 460 DEG C, more excellent, the temperature of mould and container all controls within the scope of 450 DEG C, the load reducing squeeze and act on tool and mould, when preventing from extruding, metal bonding is on instrument, worsens product surface quality.
As the improvement of the present embodiment, in extrusion process, extrusion speed controls within the scope of 5.5 ~ 6.5m/min; Carry out wearing water treatment in extruded section model outlet, can ensure product mechanical property and section bar planeness, more excellent, extrusion speed controls within the scope of 6m/min.Obtain tiny crystal grain after ensureing section bar solution treatment, ensure the physicals such as mechanical property, fatigue strength simultaneously.Reduce extrusion speed, when making extruding, ingot blank outer layer metal reduces to the resistance touching hole flowing, and inside and outside metal, velocity of flow keeps balance, avoids " vexed car " phenomenon etc. occurs.
As the improvement of the present embodiment, carry out tension leveling operation after extrusion process in 24h, extensibility is within the scope of 0.5-1.5%.
As the improvement of the present embodiment, artificially aged temperature is 175 DEG C, and aging time is 8h.
Below experimental result of the present invention:
| σ b/Mpa | σ 0.2/Mpa | δ％ |
| 335 | 310 | 14 |
| 355 | 335 | 14 |
| 345 | 315 | 13.5 |
| 360 | 330 | 14 |
| 365 | 340 | 13 |
The result that this processing method obtains can be found out: yield strength >=300MPa by upper table, tensile strength >=335MPa, elongation >=13%, relative to Standard: yield strength >=240Mpa, tensile strength >=260Mpa, elongation >=9%, significantly improves the physicalies such as the mechanics of material, fatigue, thus improve the supporting capacity of material, work-ing life and safety in utilization, reduce the application risk of material.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of the technical program, it all should be encompassed in the middle of right of the present invention.
Claims (9)
1. avoid the technique that 6061 rods and bars of aluminium alloy coarse grain rings are formed, it is characterized in that: processing step comprises alloying constituent optimization, casting rod heating, extrusion process, press quenching, tension leveling and artificial aging, chemical composition after alloying constituent optimization: Si:0.60%-0.65%, Fe:0.20%, Cu:0.19%-0.24%, Mn:0.05%-0.10%, Mg:0.90%-0.95%, Cr:0.25%-0.30%, Zn:0.15%, Ti:0.10%, other: add up to 0.15%, Al: surplus, described extrusion process adopts double hole mould extruding.
2. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 1, is characterized in that: in casting rod heating process, casting rod temperature is controlled within the scope of 485 ~ 515 DEG C.
3. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 2, is characterized in that: casting rod temperature controls at 490 DEG C.
4. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 1, is characterized in that: before extrusion process, and also comprise mould and container heating, its temperature controls respectively within the scope of 440 ~ 460 DEG C and 440 ~ 460 DEG C.
5. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 4, is characterized in that: the temperature of mould and container all controls at 450 DEG C.
6. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 1, it is characterized in that: in extrusion process, extrusion speed controls within the scope of 5.5 ~ 6.5m/min; Carry out wearing water treatment in extruded section model outlet.
7. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 6, is characterized in that: extrusion speed is 6m/min.
8. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 1, it is characterized in that: carry out tension leveling operation in 24h after extrusion process, extensibility is within the scope of 0.5-1.5%.
9. the technique avoiding 6061 rods and bars of aluminium alloy coarse grain rings to be formed according to claim 1, it is characterized in that: artificially aged temperature is 175 DEG C, aging time is 8h.
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105821265A (en) * | 2016-05-19 | 2016-08-03 | 广东伟业铝厂集团有限公司 | Large-section thick-wall alloy profile and production process thereof |
| CN105838943A (en) * | 2016-05-31 | 2016-08-10 | 广西南南铝加工有限公司 | Al-Mg-Si aluminum alloy and extrusion method for sectional bar of Al-Mg-Si aluminum alloy |
| CN105970008A (en) * | 2016-05-19 | 2016-09-28 | 广东伟业铝厂集团有限公司 | Alloy section material for air cylinders and production technology thereof |
| CN106011564A (en) * | 2016-07-25 | 2016-10-12 | 无锡海特铝业有限公司 | Coarse ring-free aluminum alloy bar and preparation method thereof |
| CN106086550A (en) * | 2016-07-21 | 2016-11-09 | 辽宁忠旺集团有限公司 | The production technology of 6061 aluminium alloy stretch bending section bars |
| CN106623464A (en) * | 2016-12-29 | 2017-05-10 | 西南铝业（集团）有限责任公司 | Method for decreasing coarse grain ring depth of 2A50 alloy extruded bar |
| CN107052077A (en) * | 2017-06-23 | 2017-08-18 | 辽宁忠旺集团有限公司 | A kind of production technology of large-diameter aluminium alloy pipe |
| CN107686916A (en) * | 2017-09-19 | 2018-02-13 | 山东友升铝业有限公司 | A kind of vehicle energy absorption box processing method |
| CN107999552A (en) * | 2017-11-30 | 2018-05-08 | 辽宁忠旺集团有限公司 | A kind of vehicle beam section bar diplopore extrudes production technology |
| CN108504914A (en) * | 2018-04-25 | 2018-09-07 | 东北轻合金有限责任公司 | A kind of preparation method of rods and bars of aluminium alloy |
| CN108941239A (en) * | 2018-06-26 | 2018-12-07 | 亚太轻合金(南通)科技有限公司 | A kind of production technology of aluminium alloy pole |
| CN109136506A (en) * | 2018-08-24 | 2019-01-04 | 山东南山铝业股份有限公司 | It is a kind of for inhibiting the processing method and aluminium alloy extrusions of aluminium alloy extrusions coarse grain ring |
| CN109355537A (en) * | 2018-12-14 | 2019-02-19 | 湖南海铝汽车工业有限公司 | New energy battery tray 6 line aluminium alloy profiles and its processing method |
| CN110614286A (en) * | 2019-11-04 | 2019-12-27 | 东北轻合金有限责任公司 | 6XXX series aluminum alloy bar extrusion on-line quenching method |
| CN111440971A (en) * | 2020-04-29 | 2020-07-24 | 郑州明泰交通新材料有限公司 | Aluminum profile for controlling coarse crystal ring and manufacturing method thereof |
| CN112207517A (en) * | 2020-09-30 | 2021-01-12 | 中国船舶重工集团公司第十二研究所 | Method for eliminating surface coarse grains of extruded part of aluminum alloy cylinder |
| CN112496074A (en) * | 2020-11-27 | 2021-03-16 | 辽宁忠旺集团有限公司 | Aluminum alloy bar for vehicle and processing method |
| CN112725668A (en) * | 2020-12-28 | 2021-04-30 | 东北轻合金有限责任公司 | 6061 aluminum alloy bar production method capable of eliminating coarse crystal ring |
| CN115418511A (en) * | 2022-09-23 | 2022-12-02 | 湖南中创空天新材料股份有限公司 | Preparation method of high-strength large-diameter 6061 aluminum alloy extruded bar |
| WO2023103921A1 (en) * | 2021-12-10 | 2023-06-15 | 广东坚美铝型材厂（集团）有限公司 | Method for repairing solid bar extrusion die |
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| CN106623464A (en) * | 2016-12-29 | 2017-05-10 | 西南铝业（集团）有限责任公司 | Method for decreasing coarse grain ring depth of 2A50 alloy extruded bar |
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| CN112207517A (en) * | 2020-09-30 | 2021-01-12 | 中国船舶重工集团公司第十二研究所 | Method for eliminating surface coarse grains of extruded part of aluminum alloy cylinder |
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Application publication date: 20160120 |