CN109594027A - A kind of ageing hot processing method improving 6 line aluminium alloy intensity - Google Patents
A kind of ageing hot processing method improving 6 line aluminium alloy intensity Download PDFInfo
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- CN109594027A CN109594027A CN201910001355.5A CN201910001355A CN109594027A CN 109594027 A CN109594027 A CN 109594027A CN 201910001355 A CN201910001355 A CN 201910001355A CN 109594027 A CN109594027 A CN 109594027A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
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Abstract
A kind of ageing hot processing method improving 6 line aluminium alloy intensity, comprising: twin-stage evenly heating processing is carried out to 6 line aluminium alloy, at 145~165 DEG C, carries out the soaking heat preservation of 2~6h；When being warming up to 170~185 DEG C, the soaking heat preservation of 5~10h is carried out.Tensile strength >=the 330MPa for 6 line aluminium alloys that the present invention is prepared, yield strength >=315MPa, elongation percentage >=8% significantly improve tensile strength, the yield strength of 6 line aluminium alloys, can satisfy the high performance requirements of product, are suitable for automotive light weight technology and design.
Description
Technical field
The invention belongs to field of aluminum alloys, and in particular to a kind of ageing hot processing method for improving 6 line aluminium alloy intensity.
Background technique
Aluminium alloy extrusions by intensity height, light weight, it is easily molded the features such as, be widely used in auto parts and components.Currently, needle
To 6082 aluminium alloys, existing standard requirements are as follows: GMW15665 standard: T6 performance, tensile strength >=300MPa, yield strength
>=270MPa, elongation percentage >=8%；EN755 performance standard: T6 performance, tensile strength >=290MPa, yield strength >=250MPa,
Elongation percentage >=8%；GB/T6892 performance standard: T6 performance, tensile strength >=310MPa, yield strength >=260MPa, elongation percentage
>=10%.
Definition based on various standards to 6082 aluminium alloys, current aging technique can satisfy the requirement of its performance.But
Tend to the popularization that aluminium alloy is applied in automobile industry, the requirement of different components also tends to be personalized, the requirement to 6082 performances into
One step is promoted.For example, the tensile strength of 6082 aluminium alloy of further requirement is promoted to 330MPa or more, yield strength reaches
315MPa or more, specific performance require as follows: T6 performance, tensile strength >=330MPa, yield strength >=315MPa, and elongation percentage >=
8%.
Al-Mg-Si system alloy ageing strengthening principle is main are as follows: and α (the Al base supersaturated solid solution) area → GP → β " → β ' →
β.6082 aluminium alloys are to belong to the high Al-Mg-Si alloy of alloy content, and wherein alloy content is high, and solid solution density is high, natrual ageing
Sensibility is stronger, i.e., β " metastable phase in timeliness strengthening process, β ' metastable phase, phase transition process is sensitive between β stable phase, difficult control
System, moreover, the natrual ageing after 6082 aluminium alloy extruded moldings at room temperature is relatively strong, it is bigger on alloy property influence,
This phenomenon is unfavorable for obtaining higher performance subsequently through artificial aging, is especially difficult to obtain tensile strength and is promoted to
330MPa or more, yield strength reach the aluminium alloy extrusions of 315MPa or more.
Summary of the invention
The purpose of the present invention is to provide a kind of ageing hot processing method for improving 6 line aluminium alloy intensity, 6 be prepared
Tensile strength >=330MPa of line aluminium alloy, yield strength >=315MPa, elongation percentage >=14% significantly improve the tension of aluminium alloy
Intensity, yield strength are suitable for automotive light weight technology and design.
In order to achieve the above objectives, the technical scheme is that
The research of the invention finds that: the precipitation rate of 6 line aluminium alloy hardening constituents depends on the temperature of timeliness；In ag(e)ing process,
The otherness that transformation is precipitated in hardening constituent is reduced, promotes its consistency, will increase has the reinforcing for promoting intensity effect in final alloy
The content of phase achievees the purpose that promote tensile strength, yield strength, is key technology of the invention.
Specifically, a kind of ageing hot processing method for improving 6 line aluminium alloy intensity provided by the invention, comprising: to described 6
Line aluminium alloy profile carries out twin-stage homogeneous heat treatment, specifically includes:
1) at 145~165 DEG C, the soaking heat preservation of 2~6h is carried out；
2) when being warming up to 170~185 DEG C, the soaking heat preservation of 5~10h is carried out.
Further, in step (1), it is from room temperature to the time used in 145~165 DEG C by 6082 aluminium alloy extrusions
70~80min.
Further, in step (2), 6082 aluminium alloy extrusions are warming up to used in 170~185 DEG C from 145~165 DEG C
Time is 30~40min.
Preferably, the ageing hot processing method for improving 6 line aluminium alloy intensity includes: (1) at 160 DEG C, carries out 4h
Samming heat preservation；(2) when being warming up to 170 DEG C, the samming heat preservation of 8h is carried out.The present invention passes through 170 DEG C of 160 DEG C+high temperature of low temperature
Heat treatment process, by intensity peak control at the beginning of β " mutually last and β ' phase.
Preferably, in step 1), by 6082 aluminium alloys from room temperature to 160 DEG C of heating-up time be 70~80min.
Preferably, in step 2), 6082 aluminium alloys are warming up to 170 DEG C of heating-up time from 160 DEG C as 30~40min.
Preferably, 6 line aluminium alloy is 6082 grade aluminium alloys.
The present invention also provides the aluminium alloys that above-mentioned ageing hot processing method is prepared.
In the present invention, high alloy content will increase the sensitivity of 6082 aluminium alloy natrual ageings in 6082 aluminium alloy
Property, when will certainly be precipitated because of a part of hardening constituent be changed into β " phase & β ' phase in this way, then carry out artificial aging, which has been analysed
Hardening constituent out just has part and is converted further into stable phase β, and then loses the effect of reinforced alloys, will lead to the strong of alloy
Degree loss.
The present invention is exactly first to use 145~165 DEG C of timeliness of low temperature by the adjustment to aging technique, it is therefore an objective to be reduced
The conversion rates for the hardening constituent β " β ' being precipitated in Natural Aging Process, while enhancing remaining non-precipitation strength and mutually assembling, turn
The generation of change reduces the difference between it, while hardening constituent being avoided largely to be precipitated；Then high-temperature aging is reused, it is therefore an objective to
On the basis of reducing difference, makes β " the phase & β ' phase for being changed into promotion intensity of hardening constituent faster, last result: make to close
The hardening constituent content of gold gets a promotion, and then to promote the intensity of alloy.Wherein the temperature of second level high-temperature aging is unsuitable excessively high,
Otherwise it can increase the difficulty that otherness is precipitated in control front and back hardening constituent again；But if temperature is lower, and production efficiency is low, actual
It is undesirable in production application.According to actual verifying, 145~165 DEG C and 170~185 DEG C have finally been formulated as two-stage time effect
Temperature.
Beneficial effects of the present invention:
The present invention is that aluminium closes to 6 by the aging thermal treating process of 170~185 DEG C of 145~165 DEG C+high temperature of low temperature of control
Golden ageing strengthening process is accurately controlled, and hardening constituent is made mutually with β ' Xiang Weizhu, to be reduced β phase with β ", promote hardening constituent and matrix
Mainly based on coherence state, the intensity and elongation percentage of aluminium alloy are promoted, tensile strength >=330MPa, yield strength are reached
>=315MPa, elongation percentage >=14%, while there is excellent intensity and elongation percentage.
Specific embodiment
Below with reference to embodiment, the present invention will be further described.
Specific embodiment
Testing equipment: aluminium extruding machine -2200T, finished product sawing machine, timeliness electric furnace, band saw, horizontal milling machine, 20T universal test
Machine.
Test procedure:
1) 6082 aluminium alloys are squeezed into bumper bar cross beam sectional bar by 2200T extruder.Before squeezing production every time, need
Full inspection cleaning is carried out to the spray head of water spray, prevents to influence the cooling rate of product because spray head blocks, causes solid solubility to decline, shadow
Ring properties of product.
2) specific length is sawed by finished product sawing machine.
3) ageing treatment is carried out respectively using same timeliness electric furnace, amount to 16 groups, every group sample preparation 3, specific timeliness is hot
Treatment process condition is referring to table 1.
4) band saw and horizontal milling machine are used, carries out the production of tensile sample to product after timeliness respectively, in case performance detection；
According to GB/T16865 standard, every group sample preparation 3.
5) using 20T universal testing machine carry out performance detection, measurement method execute GB/T228 standard, testing result referring to
Table 1.
6) according to test result, timeliness is carried out to qualified group again, then repeatedly 4) 5) carries out the inspection of performance, sample preparation
10.Same batch products, detection performance result are verified again using 160 DEG C/4h+170 DEG C/8h institution of prescription (embodiment 4-6)
Referring to table 2.
By table 1-2 it is found that the aluminium alloy 100% of existing 6 line aluminium alloy aging thermal treating process (comparative example 1-9) processing
It is unsatisfactory for high performance requirements, comparative example 10-24 product 100% can not meet high performance requirements.When 1-21 of the embodiment of the present invention
The lower aluminium alloy tensile strength >=330MPa manufactured of effect heat treatment process control, yield strength >=315MPa, elongation percentage >=14%,
There is excellent intensity and elongation percentage simultaneously, product 100% meets high performance requirements.
Table 1
Table 2
Claims (8)
1. a kind of ageing hot processing method for improving 6 line aluminium alloy intensity, which comprises the steps of: to 6 system
Aluminium alloy carries out twin-stage evenly heating processing, comprising:
1) at 145~165 DEG C, the soaking heat preservation of 2~6h is carried out；
2) when being warming up to 170~185 DEG C, the soaking heat preservation of 5~10h is carried out.
2. the ageing hot processing method according to claim 1 for improving 6 line aluminium alloy intensity, which is characterized in that step 1)
In, by 6082 aluminium alloys from room temperature to 145~165 DEG C of heating-up time be 70~80min.
3. the ageing hot processing method according to claim 1 for improving 6 line aluminium alloy intensity, which is characterized in that step 2)
In, 6082 aluminium alloys are warming up to 170~185 DEG C of heating-up time from 145~165 DEG C as 30~40min.
4. the ageing hot processing method according to claim 1 for improving 6 line aluminium alloy intensity, which is characterized in that described to mention
The heat treatment method of high 6 line aluminium alloy intensity includes: 1) at 160 DEG C, and the samming for carrying out 4h is kept the temperature；2) when being warming up to 170 DEG C,
Carry out the samming heat preservation of 8h.
5. the ageing hot processing method according to claim 4 for improving 6 line aluminium alloy intensity, which is characterized in that step 1)
In, by 6082 aluminium alloys from room temperature to 160 DEG C of heating-up time be 70~80min.
6. the ageing hot processing method according to claim 4 for improving 6 line aluminium alloy intensity, which is characterized in that step 2)
In, 6082 aluminium alloys are warming up to 170 DEG C of heating-up time from 160 DEG C as 30~40min.
7. the ageing hot processing method according to claim 1-6 for improving 6 line aluminium alloy intensity, feature exist
In 6 line aluminium alloy is 6082 grade aluminium alloys.
8. the aluminium alloy being prepared such as the described in any item ageing hot processing methods of claim 1-7.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938758A (en) * | 2019-12-09 | 2020-03-31 | 东北轻合金有限责任公司 | Manufacturing method of T61 state 6 series plate |
| CN112538597A (en) * | 2020-10-19 | 2021-03-23 | 东莞长盈精密技术有限公司 | Aluminum alloy shell and preparation method and application thereof |
| CN114908304A (en) * | 2022-05-12 | 2022-08-16 | 江苏亚太航空科技有限公司 | Aging process for improving strength and thermal stability of aluminum alloy |
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| CN105385971A (en) * | 2015-12-17 | 2016-03-09 | 上海友升铝业有限公司 | Aging process for AI-Mg-Si based alloy after bent deformation |
| CN108381117A (en) * | 2018-01-24 | 2018-08-10 | 广西南南铝加工有限公司 | A kind of heat-treatable strengthened aluminum alloy soldering technique |
| CN108866363A (en) * | 2018-07-25 | 2018-11-23 | 辽宁忠旺集团有限公司 | A kind of 6082 aluminum alloy thick wall tubing production technologies |
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2019
- 2019-01-02 CN CN201910001355.5A patent/CN109594027A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105385971A (en) * | 2015-12-17 | 2016-03-09 | 上海友升铝业有限公司 | Aging process for AI-Mg-Si based alloy after bent deformation |
| CN108381117A (en) * | 2018-01-24 | 2018-08-10 | 广西南南铝加工有限公司 | A kind of heat-treatable strengthened aluminum alloy soldering technique |
| CN108866363A (en) * | 2018-07-25 | 2018-11-23 | 辽宁忠旺集团有限公司 | A kind of 6082 aluminum alloy thick wall tubing production technologies |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938758A (en) * | 2019-12-09 | 2020-03-31 | 东北轻合金有限责任公司 | Manufacturing method of T61 state 6 series plate |
| CN112538597A (en) * | 2020-10-19 | 2021-03-23 | 东莞长盈精密技术有限公司 | Aluminum alloy shell and preparation method and application thereof |
| CN114908304A (en) * | 2022-05-12 | 2022-08-16 | 江苏亚太航空科技有限公司 | Aging process for improving strength and thermal stability of aluminum alloy |
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Application publication date: 20190409 |