CN102330041A - Aging heat treatment method for aluminium alloy section - Google Patents
Aging heat treatment method for aluminium alloy section Download PDFInfo
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- CN102330041A CN102330041A CN201110216129A CN201110216129A CN102330041A CN 102330041 A CN102330041 A CN 102330041A CN 201110216129 A CN201110216129 A CN 201110216129A CN 201110216129 A CN201110216129 A CN 201110216129A CN 102330041 A CN102330041 A CN 102330041A
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Abstract
The invention discloses an aging heat treatment method for an aluminium alloy section. The aging temperature is 155-170DEG C, and the thermal insulation time is 10-16 hours. With the aging heat treatment method for an aluminium alloy section, which is provided by the invention, the obtained aluminium alloy section has higher strength, better plasticity, lower yield strength and high percentage elongation if being compared with the section obtained with the traditional method.
Description
Technical field
The present invention relates to aluminium alloy extrusions manufacturing technology field, relate in particular to a kind of ageing hot processing method of aluminium alloy extrusions.
Background technology
6 line aluminium alloys are with its medium tenacity, good erosion resistance, polishability, anode oxidation coloration property.It is used widely on aluminum, aluminium radiator, electronic component in aluminum alloy doors and windows, engineering construction structured material, track traffic through the section bar of extrusion molding.
6 is but that alloy belongs to the thermal treatment reinforced alloys, and the section bar of its preparation is after overaging thermal treatment, and its intensity can improve about 100MPa.And the aging thermal treating process parameter of aluminium alloy extrusions (being in particular in its thermal treatment temp and soaking time) is different, has a strong impact on intensity, plasticity, corrosion resistance of the section bar that is obtained etc.The main strengthening mechanism of 6 line aluminium alloys is through the aging heat treatment effect, controls its second phase Mg
2Si separates out quantity and disperse distribution, thereby makes its tensile strength improve.Therefore, the content of alloying element (like main alloy element Mg, Si) also is the important factor that influences its intensity and heat treatment reinforcement effect.
Under some working conditions, the aluminum alloy materials that expectation obtains not only has higher intensity, also should have plasticity (and ys is lower, unit elongation is higher) preferably simultaneously.At present, the timeliness thermal treatment temp that is adopted in the 6 line aluminium alloy section bar manufacturing processedes is between 175-210 ℃, and soaking time is 4-8h; According to the different-alloy composition, the tensile strength of section bar finished product is between 175 ~ 300MPa, and its elongation after fracture is between 6% ~ 12%.But in present manufacturing technology, the intensity of product raises after the timeliness thermal treatment, and its plasticity seriously descends, and can not keep having good over-all properties.
Summary of the invention
The embodiment of the invention provides a kind of ageing hot processing method of aluminium alloy extrusions, can make the aluminium alloy extrusions that the intensity height keeps better plasticity simultaneously.
For realizing above-mentioned purpose, the embodiment of the invention provides following technical scheme:
A kind of ageing hot processing method of aluminium alloy extrusions, said aging temp are 155-170 ℃, and soaking time is 10-16 hour.
Further, section bar extrusion molding and residence time of packing between the aging oven are no more than 8 hours.
Further, timeliness thermal treatment heat-up rate is 0.8 ~ 1.5 ℃/min.
Further, used aluminium alloy cast ingot composition and the weight percent of said aging treatment method is: Si:0.55 ~ 1.1%; Mg:0.55 ~ 1.0%; Fe :≤0.5%; Cu :≤0.25%; Mn :≤0.7%; Cr:0.1 ~ 0.15%; Zn :≤0.2%; Ti:0.01 ~ 0.05%; Residue content is Al, and the weight percent of said Mg and said Si satisfies: 0.9 < Mg:Si < 1.6.Compared with prior art; Ageing hot processing method provided by the invention makes Mg2Si second evenly separate out in matrix with the particle form of disperse; Reduce the segregation that Mg2Si second locates at crystal boundary etc.; And when composition designed, the content of Mg and Si (weight percent) satisfied 0.9 < Mg:Si < 1.6, can satisfy the Mg element and be present in the alloy substrate with the second phase form fully.Aluminium alloy extrusions changes the timeliness heat treatment step through parking after the extrusion molding over to after being no more than 8h, through using lesser temps and the timeliness thermal treatment of long period, makes that separating out of Mg2Si is comparatively slow, and its precipitation state is thinner dispersoid particle.The distribution of this kind second phase helps to improve its strengthening effect.Therefore the section bar tensile strength that makes of the present invention increases more than about 15MPa than 175 ℃ of same time intensity of timeliness in the prior art, and plasticity is better, and ys is lower and unit elongation is higher.That the embodiment of this discovery can be applicable to is conventional 6061,6063,6101,6005,6005A, 6081, alloys range such as 6082.
Embodiment
To carry out clear, intactly description to the technical scheme in the embodiment of the invention below, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention adopts lesser temps long period ageing treatment through changing the method for high-temperature short period of time timeliness in the prior art, strengthens its tensile strength when guaranteeing aluminium alloy extrusions plasticity.It below is specific embodiment.
Embodiment one
Aluminium alloy cast ingot composition (weight percent W%) is as follows:
Si:0.63%; Mg:0.63%; Fe:0.14%; Cu:0.005%; Mn:0.29%; Cr:0.10%; Zn :≤0.002%; Ti:0.04%; Residue content is Al, Mg%:Si%=1.
The extrusion molding of section bar and quench treatment process: ingot casting is heated to 510 ℃ before the extrusion molding; Extrusion speed (section bar velocity of discharge) is controlled at 2.0-3.5m/min; The water temp that quenches is controlled at 520-530 ℃; Use water quenching, quench cooling rate 200-400 ℃/min;
The timeliness heat treatment process: section bar is removed curved part, the aging oven timeliness of packing into subsequently (residence time is no more than 8 hours), 160 ℃ of aging temps, soaking time 10-16 hour through the extrusion molding back draft.
In order to verify the meliority of this processing parameter, carry out 175 ℃ aging test simultaneously, and compare.Detect mechanical property behind the section bar completion of prescription, the Mechanics Performance Testing result of comparative is following:
Can find out from test-results: during 160 ℃ of timeliness of (1) section bar, its tensile strength is than 175 ℃ of high about 15MPa of intensity of same time of timeliness; (2) compare with 175 ℃, section bar is timeliness under 160 ℃ of temperature, its plasticity better (show: ys is more hanged down about 10MPa, and unit elongation is higher by about 5%).
Embodiment two
Aluminium alloy cast ingot composition (weight percent W%) is as follows:
Si:0.94%; Fe:0.21%; Cu:0.003%; Mn:0.58%; Mg:0.85%; Cr:0.11%; Zn :≤0.004%; Ti:0.023%; Residue content is the content of Al, Mg%:Si%=0.9.
The extrusion molding of section bar and quench treatment process: ingot casting is heated to 515 ℃ before the extrusion molding; Extrusion speed (section bar velocity of discharge) is controlled at 3.0 ~ 5.0m/min; The water temp that quenches is controlled at 535 ~ 545 ℃; Use wind quenches, 180 ~ 320 ℃/min of quench cooling rate;
The timeliness heat treatment process: section bar is removed curved part, the aging oven timeliness of packing into subsequently (residence time is no more than 8 hours), 155 ℃ of aging temps, soaking time 10 ~ 16 hours through the extrusion molding back draft.
In order to verify the meliority of this processing parameter, carry out 175 ℃ aging test simultaneously, and compare.Detect mechanical property behind the section bar completion of prescription, the Mechanics Performance Testing result of comparative is following:
Can find out from test-results: during 155 ℃ of timeliness of (1) section bar, its tensile strength is than 175 ℃ of high about 15MPa of intensity of same time of timeliness; (2) compare with 175 ℃, section bar is timeliness under 155 ℃ of temperature, and its plasticity is better, and ys is lower and unit elongation is higher.
Embodiment three
Aluminium alloy cast ingot composition (weight percent W%) is as follows:
Si:0.625%; Fe:0.4%; Cu:0.21%; Mn:0.1%; Mg:1.0%; Cr:0.15%; Zn :≤0.1%; Ti:0.01%; Residue content is the content of Al, Mg%:Si%=1.6.
The extrusion molding of section bar and quench treatment process: ingot casting is heated to 515 ℃ before the extrusion molding; Extrusion speed (section bar velocity of discharge) is controlled at 5.0 ~ 8.0m/min; The water temp that quenches is controlled at 525 ~ 540 ℃; Use water quenching, 280 ~ 400 ℃/min of quench cooling rate;
The timeliness heat treatment process: section bar is removed curved part, the aging oven timeliness of packing into subsequently (residence time is no more than 8 hours), 170 ℃ of aging temps, soaking time 10 ~ 16 hours through the extrusion molding back draft.
In order to verify the meliority of this processing parameter, carry out 175 ℃ aging test simultaneously, and compare.Detect mechanical property behind the section bar completion of prescription, the Mechanics Performance Testing result of comparative is following:
Can find out from test-results: during 170 ℃ of timeliness of (1) section bar, its tensile strength is than 175 ℃ of high about 12MPa of intensity of same time of timeliness; (2) compare with 175 ℃, section bar is timeliness under 170 ℃ of temperature, and its plasticity is better, and ys is lower and unit elongation is higher.
Embodiment four
Aluminium alloy cast ingot composition (weight percent W%) is as follows:
Si:0.55%; Mg:0.77%; Fe:0.2%; Cu:0.015%; Mn:0.7%; Cr:0.12%; Zn:0.01%; Ti:0.03%; Residue content is Al, Mg%:Si%=1.4.
The extrusion molding of section bar and quench treatment process: ingot casting is heated to 515 ℃ before the extrusion molding; Extrusion speed (section bar velocity of discharge) is controlled at 5.0 ~ 8.0m/min; The water temp that quenches is controlled at 525 ~ 540 ℃; Use water quenching, 250 ~ 400 ℃/min of quench cooling rate;
The timeliness heat treatment process: section bar is removed curved part, the aging oven timeliness of packing into subsequently (residence time is no more than 8 hours), 168 ℃ of aging temps, soaking time 10 ~ 16 hours through the extrusion molding back draft.
In order to verify the meliority of this processing parameter, carry out 175 ℃ aging test simultaneously, and compare.Detect mechanical property behind the section bar completion of prescription, the Mechanics Performance Testing result of comparative is following:
Can find out from test-results: during 168 ℃ of timeliness of (1) section bar, its tensile strength is than 175 ℃ of high about 10MPa of intensity of same time of timeliness; (2) compare with 175 ℃, section bar is timeliness under 168 ℃ of temperature, and its plasticity is better, and ys is lower and unit elongation is higher.
Embodiment five
Aluminium alloy cast ingot composition (weight percent W%) is as follows:
Si:1.1%; Mg:0.99%; Fe:0.4%; Cu:0.01%; Mn:0.3%; Cr:0.13%; Zn:0.015%; Ti:0.05%; Residue content is Al, Mg%:Si%=0.9.
The extrusion molding of section bar and quench treatment process: ingot casting is heated to 515 ℃ before the extrusion molding; Extrusion speed (section bar velocity of discharge) is controlled at 5.0 ~ 8.0m/min; The water temp that quenches is controlled at 525 ~ 540 ℃; Use water quenching, 250 ~ 400 ℃/min of quench cooling rate;
The timeliness heat treatment process: section bar is removed curved part, the aging oven timeliness of packing into subsequently (residence time is no more than 8 hours), 157 ℃ of aging temps, soaking time 10 ~ 16 hours through the extrusion molding back draft.
In order to verify the meliority of this processing parameter, carry out 175 ℃ aging test simultaneously, and compare.Detect mechanical property behind the section bar completion of prescription, the Mechanics Performance Testing result of comparative is following:
Can find out from test-results: during 157 ℃ of timeliness of (1) section bar, its tensile strength is than 175 ℃ of high about 11MPa of intensity of same time of timeliness; (2) compare with 175 ℃, section bar is timeliness under 157 ℃ of temperature, and its plasticity is better, and ys is lower and unit elongation is higher.
Embodiment six
Aluminium alloy cast ingot composition (weight percent W%) is as follows:
Si:0.6%; Mg:0.55%; Fe:0.1%; Cu:0.015%; Mn:0.1%; Cr:0.14%; Zn:0.008%; Ti:0.01%; Residue content is Al, Mg%:Si%=0.92.
The extrusion molding of section bar and quench treatment process: ingot casting is heated to 515 ℃ before the extrusion molding; Extrusion speed (section bar velocity of discharge) is controlled at 5.0 ~ 8.0m/min; The water temp that quenches is controlled at 525 ~ 540 ℃; Use water quenching, 200 ~ 350 ℃/min of quench cooling rate;
The timeliness heat treatment process: section bar is removed curved part, the aging oven timeliness of packing into subsequently (residence time is no more than 8 hours), 163 ℃ of aging temps, soaking time 10 ~ 16 hours through the extrusion molding back draft.
In order to verify the meliority of this processing parameter, carry out 175 ℃ aging test simultaneously, and compare.Detect mechanical property behind the section bar completion of prescription, the Mechanics Performance Testing result of comparative is following:
Can find out from test-results: during 163 ℃ of timeliness of (1) section bar, its tensile strength is than 175 ℃ of high about 15MPa of intensity of same time of timeliness; (2) compare with 175 ℃, section bar is timeliness under 163 ℃ of temperature, and its plasticity is better, and ys is lower and unit elongation is higher.
More than the ageing hot processing method of a kind of aluminium alloy extrusions that the embodiment of the invention is provided carried out detailed introduction; Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change can know that to sum up this description should not be construed as limitation of the present invention.
Claims (4)
1. the ageing hot processing method of an aluminium alloy extrusions is characterized in that, aging temp is 155-170 ℃, and soaking time is 10-16 hour.
2. the ageing hot processing method of a kind of aluminium alloy extrusions according to claim 1 is characterized in that, the section bar extrusion molding and the residence time of packing between the aging oven are no more than 8 hours.
3. the ageing hot processing method of a kind of aluminium alloy extrusions according to claim 1 is characterized in that, heat-up rate is 0.8 ~ 1.5 ℃/min.
4. the ageing hot processing method of a kind of aluminium alloy extrusions according to claim 1 is characterized in that, aluminium alloy cast ingot composition and weight percent that said heat treating method is used are: Si:0.55 ~ 1.1%; Mg:0.55 ~ 1.0%; Fe :≤0.5%; Cu :≤0.25%; Mn :≤0.7%; Cr:0.1 ~ 0.15%; Zn :≤0.2%; Ti:0.01 ~ 0.05%; Residue content is Al, and the weight percent of said Mg and said Si satisfies: 0.9 < Mg:Si < 1.6.
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Citations (5)
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| JPH09249953A (en) * | 1996-03-12 | 1997-09-22 | Nippon Light Metal Co Ltd | Production of aluminum extruded material forged product |
| JP2002348630A (en) * | 2001-05-18 | 2002-12-04 | Nissan Motor Co Ltd | Aluminum forged component and manufacturing method therefor |
| CN101935788A (en) * | 2010-10-19 | 2011-01-05 | 上海友升铝业有限公司 | Aluminum-magnesium-silicon series aluminum alloy material with middle and high intensity |
| CN101935784A (en) * | 2010-08-30 | 2011-01-05 | 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 |
| CN101536112B (en) * | 2006-10-30 | 2011-10-19 | 株式会社自动网络技术研究所 | Wire conductor and process for producing the same |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09249953A (en) * | 1996-03-12 | 1997-09-22 | Nippon Light Metal Co Ltd | Production of aluminum extruded material forged product |
| JP2002348630A (en) * | 2001-05-18 | 2002-12-04 | Nissan Motor Co Ltd | Aluminum forged component and manufacturing method therefor |
| CN101536112B (en) * | 2006-10-30 | 2011-10-19 | 株式会社自动网络技术研究所 | Wire conductor and process for producing the same |
| CN101935784A (en) * | 2010-08-30 | 2011-01-05 | 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 |
| CN101935788A (en) * | 2010-10-19 | 2011-01-05 | 上海友升铝业有限公司 | Aluminum-magnesium-silicon series aluminum alloy material with middle and high intensity |
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Address after: 410200 Sheng Tong Industrial Park, 109 Jinxing Road, Wangcheng District, Changsha, Hunan. Patentee after: Suntown Technology Group Corporation Address before: 410200 Sheng Tong Industrial Park, 109 Jinxing Road, Wangcheng District, Changsha, Hunan. Patentee before: Hunan Shengtong Technology Group Co., Ltd. |