CN102330041B - A kind of ageing hot processing method of aluminium alloy extrusions - Google Patents
A kind of ageing hot processing method of aluminium alloy extrusions Download PDFInfo
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- CN102330041B CN102330041B CN201110216129.2A CN201110216129A CN102330041B CN 102330041 B CN102330041 B CN 102330041B CN 201110216129 A CN201110216129 A CN 201110216129A CN 102330041 B CN102330041 B CN 102330041B
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- section bar
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Abstract
The invention discloses a kind of ageing hot processing method of aluminium alloy extrusions, aging temp is 155-170 DEG C, and soaking time is 10-16 hour.The ageing hot processing method of aluminium alloy extrusions provided by the invention, obtained aluminium alloy extrusions is compared with the section bar obtained by conventional process, and its intensity is higher, and plasticity is better, and yield strength is low, and unit elongation is high.
Description
Technical field
The present invention relates to aluminium alloy extrusions manufacturing technology field, particularly relate 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.Its section bar through extrusion molding is used widely on aluminum alloy doors and windows, engineering construction structured material, track traffic aluminum, aluminium radiator, electronic component.
6 be alloy belong to thermal treatment can reinforced alloys, its section bar prepared is after aging strengthening model, and its intensity can improve about 100MPa.And the difference of the aging thermal treating process parameter of aluminium alloy extrusions (being in particular in its thermal treatment temp and soaking time), have a strong impact on the intensity of obtained section bar, plasticity, corrosion resistance etc.The main strengthening mechanism of 6 line aluminium alloys is by aging heat treatment effect, controls its second-phase Mg
2si separates out quantity and Dispersed precipitate state, thus its tensile strength is improved.Therefore, the content (as main alloy element Mg, Si) of alloying element is also the important factor affecting its intensity and heat treatment reinforcement effect.
Under some working conditions, expect that the aluminum alloy materials obtained not only has higher intensity, also should have good plasticity (and yield strength is lower, unit elongation higher) simultaneously.At present, the aging strengthening model temperature adopted in 6 line aluminium alloy section bar manufacturing processedes is between 175-210 DEG C, and soaking time is 4-8h; According to 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 current manufacturing technology, after aging strengthening model, the intensity of product raises, and its plasticity degradation, the over-all properties had can not be kept.
Summary of the invention
Embodiments provide a kind of ageing hot processing method of aluminium alloy extrusions, the aluminium alloy extrusions that intensity height keeps better plasticity simultaneously can be obtained.
For achieving the above object, the embodiment of the present invention provides following technical scheme:
An ageing hot processing method for aluminium alloy extrusions, described aging temp is 155-170 DEG C, and soaking time is 10-16 hour.
Further, profile extrusion shaping and residence time loaded between aging oven is no more than 8 hours.
Further, aging strengthening model heat-up rate is 0.8 ~ 1.5 DEG C/min.
Further, the aluminium alloy cast ingot composition that described aging treatment method is used and weight percent 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 described Mg and described Si meets: 0.9<Mg:Si<1.6.Compared with prior art, ageing hot processing method provided by the invention makes Mg2Si second-phase evenly separate out in the base with the particle form of disperse, reduce the segregation of Mg2Si second-phase at places such as crystal boundaries, and when Composition Design, the content (weight percent) of Mg and Si meets 0.9<Mg:Si<1.6, can meet Mg element and be present in alloy substrate with second-phase form completely.Aluminium alloy extrusions proceeds to aging strengthening model operation after parking after extrusion molding and being no more than 8h, and by using lesser temps and the aging strengthening model of long period, make the precipitation of Mg2Si comparatively slow, its precipitation state is thinner dispersoid particle.The distribution of this kind of second-phase, contributes to improving its strengthening effect.Therefore the section bar tensile strength that obtains of the present invention increases about more than 15MPa than the same time intensity of 175 DEG C of timeliness in prior art, and plasticity is better, and yield strength is lower and unit elongation is higher.The embodiment of this discovery can be applicable to conventional 6061,6063,6101,6005,6005A, 6081, the alloys range such as 6082.
Embodiment
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention, by changing the method for high-temperature short period of time timeliness in prior art, adopts lesser temps long period ageing treatment, strengthens its tensile strength while ensureing aluminium alloy extrusions plasticity.It is below 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: before extrusion molding, ingot casting is heated to 510 DEG C; Extrusion speed (section bar velocity of discharge) controls at 2.0-3.5m/min; Quenching water-inlet temperature controls at 520-530 DEG C; Use water quenching, quench cooling rate 200-400 DEG C/min;
Aging strengthening model process: section bar, through extrusion molding back draft, removes curved part, loads aging oven timeliness (residence time is no more than 8 hours) subsequently, aging temp 160 DEG C, soaking time 10-16 hour.
In order to verify the superiority of this processing parameter, carrying out the aging test of 175 DEG C simultaneously, and contrasting.Detect mechanical property after section bar completion of prescription, the mechanical experimental results of comparative is as follows:
As can be seen from the test results: during (1) section bar 160 DEG C of timeliness, its tensile strength is than 175 DEG C of timeliness same time intensity height about 15MPa; (2) compared with 175 DEG C, section bar is timeliness at 160 DEG C of temperature, its plasticity better (show: the lower about 10MPa of yield strength, 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: before extrusion molding, ingot casting is heated to 515 DEG C; Extrusion speed (section bar velocity of discharge) controls at 3.0 ~ 5.0m/min; Quenching water-inlet temperature controls at 535 ~ 545 DEG C; Use wind quenches, quench cooling rate 180 ~ 320 DEG C/min;
Aging strengthening model process: section bar, through extrusion molding back draft, removes curved part, loads aging oven timeliness (residence time is no more than 8 hours) subsequently, aging temp 155 DEG C, soaking time 10 ~ 16 hours.
In order to verify the superiority of this processing parameter, carrying out the aging test of 175 DEG C simultaneously, and contrasting.Detect mechanical property after section bar completion of prescription, the mechanical experimental results of comparative is as follows:
As can be seen from the test results: during (1) section bar 155 DEG C of timeliness, its tensile strength is than 175 DEG C of timeliness same time intensity height about 15MPa; (2) compared with 175 DEG C, section bar is timeliness at 155 DEG C of temperature, and its plasticity is better, and yield strength 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: before extrusion molding, ingot casting is heated to 515 DEG C; Extrusion speed (section bar velocity of discharge) controls at 5.0 ~ 8.0m/min; Quenching water-inlet temperature controls at 525 ~ 540 DEG C; Use water quenching, quench cooling rate 280 ~ 400 DEG C/min;
Aging strengthening model process: section bar, through extrusion molding back draft, removes curved part, loads aging oven timeliness (residence time is no more than 8 hours) subsequently, aging temp 170 DEG C, soaking time 10 ~ 16 hours.
In order to verify the superiority of this processing parameter, carrying out the aging test of 175 DEG C simultaneously, and contrasting.Detect mechanical property after section bar completion of prescription, the mechanical experimental results of comparative is as follows:
As can be seen from the test results: during (1) section bar 170 DEG C of timeliness, its tensile strength is than 175 DEG C of timeliness same time intensity height about 12MPa; (2) compared with 175 DEG C, section bar is timeliness at 170 DEG C of temperature, and its plasticity is better, and yield strength 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: before extrusion molding, ingot casting is heated to 515 DEG C; Extrusion speed (section bar velocity of discharge) controls at 5.0 ~ 8.0m/min; Quenching water-inlet temperature controls at 525 ~ 540 DEG C; Use water quenching, quench cooling rate 250 ~ 400 DEG C/min;
Aging strengthening model process: section bar, through extrusion molding back draft, removes curved part, loads aging oven timeliness (residence time is no more than 8 hours) subsequently, aging temp 168 DEG C, soaking time 10 ~ 16 hours.
In order to verify the superiority of this processing parameter, carrying out the aging test of 175 DEG C simultaneously, and contrasting.Detect mechanical property after section bar completion of prescription, the mechanical experimental results of comparative is as follows:
As can be seen from the test results: during (1) section bar 168 DEG C of timeliness, its tensile strength is than 175 DEG C of timeliness same time intensity height about 10MPa; (2) compared with 175 DEG C, section bar is timeliness at 168 DEG C of temperature, and its plasticity is better, and yield strength 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: before extrusion molding, ingot casting is heated to 515 DEG C; Extrusion speed (section bar velocity of discharge) controls at 5.0 ~ 8.0m/min; Quenching water-inlet temperature controls at 525 ~ 540 DEG C; Use water quenching, quench cooling rate 250 ~ 400 DEG C/min;
Aging strengthening model process: section bar, through extrusion molding back draft, removes curved part, loads aging oven timeliness (residence time is no more than 8 hours) subsequently, aging temp 157 DEG C, soaking time 10 ~ 16 hours.
In order to verify the superiority of this processing parameter, carrying out the aging test of 175 DEG C simultaneously, and contrasting.Detect mechanical property after section bar completion of prescription, the mechanical experimental results of comparative is as follows:
As can be seen from the test results: during (1) section bar 157 DEG C of timeliness, its tensile strength is than 175 DEG C of timeliness same time intensity height about 11MPa; (2) compared with 175 DEG C, section bar is timeliness at 157 DEG C of temperature, and its plasticity is better, and yield strength 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: before extrusion molding, ingot casting is heated to 515 DEG C; Extrusion speed (section bar velocity of discharge) controls at 5.0 ~ 8.0m/min; Quenching water-inlet temperature controls at 525 ~ 540 DEG C; Use water quenching, quench cooling rate 200 ~ 350 DEG C/min;
Aging strengthening model process: section bar, through extrusion molding back draft, removes curved part, loads aging oven timeliness (residence time is no more than 8 hours) subsequently, aging temp 163 DEG C, soaking time 10 ~ 16 hours.
In order to verify the superiority of this processing parameter, carrying out the aging test of 175 DEG C simultaneously, and contrasting.Detect mechanical property after section bar completion of prescription, the mechanical experimental results of comparative is as follows:
As can be seen from the test results: during (1) section bar 163 DEG C of timeliness, its tensile strength is than 175 DEG C of timeliness same time intensity height about 15MPa; (2) compared with 175 DEG C, section bar is timeliness at 163 DEG C of temperature, and its plasticity is better, and yield strength is lower and unit elongation is higher.
Above the ageing hot processing method of a kind of aluminium alloy extrusions that the embodiment of the present invention provides is described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in summary, this description should not be construed as limitation of the present invention.
Claims (1)
1. an ageing hot processing method for aluminium alloy extrusions, is characterized in that, aging temp is 155-170 DEG C, and soaking time is 10-16 hour; Profile extrusion shaping and residence time loaded between aging oven is no more than 8 hours; Heat-up rate is 0.8 ~ 1.5 DEG C/min; The aluminium alloy cast ingot composition that described heat treating method is used and weight percent are: Si:0.94 ~ 1.1%; Mg:0.99 ~ 1.0%; Fe :≤0.5%; Cu:0.003% ~ 0.015%; Mn:0.58% ~ 0.7%; Cr:0.1 ~ 0.15%; Zn :≤0.2% and >0%; Ti:0.01 ~ 0.05%; Residue content is Al, and the weight percent of described Mg and described Si meets: 0.9<Mg:Si<1.6.
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| 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 |
| 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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| 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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