CN103540880B - A kind of Al-Zn-Mg-Cu aluminum alloy strengthens tough aging process - Google Patents
A kind of Al-Zn-Mg-Cu aluminum alloy strengthens tough aging process Download PDFInfo
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Abstract
The present invention is that a kind of Al-Zn-Mg-Cu aluminum alloy strengthens tough aging process, it is characterized in that: the method increases preageing before Al-Zn-Mg-Cu aluminum alloy T6, T74, T73, T76, T77, T78 or T79 artificial aging technique, the Heating temperature of preageing system is 80 DEG C ~ 115 DEG C, and aging time is 4 ~ 96 hours.The aluminum alloy chemical composition that the method is suitable for and weight percent are: Zn5.0 ~ 12.0%, Mg1.2 ~ 3.2%, Cu1.0 ~ 3.0%, Zr0.04 ~ 0.30% or Cr0.10 ~ 0.40%, Si≤0.50%, Fe≤0.50%, Ti≤0.10%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.The method is applicable to production aerospace, boats and ships and aluminium alloys for automobile slab, thin plate, forging and squeeze wood.
Description
Technical field
The present invention is that a kind of Al-Zn-Mg-Cu aluminum alloy strengthens tough aging process, belongs to metal material engineering technical field.The novel aluminum alloy goods adopting present method to produce have excellent intensity and toughness.
Background technology
In recent years, the strong Al-Zn-Mg-Cu aluminum alloy of some superelevation has been developed as 7055 in this area, and 7449,7068 and 7085 etc.; Also some processing methodes improving Fracture of Material energy have been developed as T6, T73, T74, T76, T77, T78 and T79 thermal treatment process etc.
The mentality of designing of the thermal treatment process such as T77, T78 and T79 adopts more shallow overaging, to ensure material high intensity level.T77 aging technique passes through transformation and the back dissolving in higher temperatures secondary time effect control GP district in short-term, and improve toughness of material and corrosion resisting property, chilling sets up material metastable state subsequently, is separating out GP district further through three-step aging, ensures material high intensity level; T78 and T79 aging technique is close with T77 aging technique mentality of designing, all adopts more shallow timeliness to control the reduction of the strength of materials.
Modern mechanical design more focuses on less energy-consumption and high life, and during for meeting the Transport Machinery such as aircraft, automobile and boats and ships long boat, the demand of high life and economy, the demand of high performance material is more and more higher.As the aluminium alloy of aircraft primary structure material, general consumption accounts for more than 30% of complete machine weight, can reach close to 80%.So, more and more higher to the requirement of Al-Zn-Mg-Cu based material intensity and tough over-all properties.
Summary of the invention
The present invention designs for above-mentioned prior art situation just and provides a kind of Al-Zn-Mg-Cu aluminum alloy and strengthen tough aging process, its objective is and improves Al-Zn-Mg-Cu based material intensity and tough over-all properties further.
Al-Zn-Mg-Cu aluminum alloy is high strength alumin ium alloy, and alloy, based on precipitation strength, organizes Precipitation Behavior to be after solid solution: supersaturated solid solution → GP district → η ' → η.GP district and matrix coherence; η ' and matrix half coherence; η phase is equilibrium phase.Different according to formation condition, GP district at room temperature can be formed; More than 120 DEG C, GP district starts to η ' phase in version; More than 143 DEG C, η ' is η phase in version in opposite directions, and is less than the GP district back dissolving matrix of critical size.
Technical solution of the present invention is according to above-mentioned principle, and the research kind of long-time aging on precipitated phase and the impact of form, research shows that less than 120 DEG C GP districts fully separate out, and also increases, reach solute atoms and balance along with temperature raises its size.
The content of technical solution of the present invention is:
This kind of Al-Zn-Mg-Cu aluminum alloy strengthens tough aging process, it is characterized in that: the method increases preageing before Al-Zn-Mg-Cu aluminum alloy T6, T74, T73, T76, T77, T78 or T79 artificial aging technique, the Heating temperature of preageing system is 80 DEG C ~ 115 DEG C, and aging time is 4 ~ 96 hours.
T6, T74, T73, T76, T77, T78 or T79 artificial aging first step aging temp that preageing carries out with it is afterwards low 10 ~ 35 DEG C.
Preageing adopts continuously or the mode of staged heating and thermal insulation completes.
The Heating temperature of preageing system is 80 DEG C ~ 89 DEG C, and aging time is 4 ~ 96 hours.
The Heating temperature of preageing system is 90 DEG C ~ 99 DEG C, and aging time is 20 ~ 60 hours.
The Heating temperature of preageing system is 100 DEG C ~ 115 DEG C, and aging time is 4 ~ 24 hours.
The chemical composition of Al-Zn-Mg-Cu aluminum alloy and weight percent are: Zn5.0 ~ 12.0%, Mg1.2 ~ 3.2%, Cu1.0 ~ 3.0%, Zr0.04 ~ 0.30% or Cr0.10 ~ 0.40%, Si≤0.50%, Fe≤0.50%, Ti≤0.10%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
Technical solution of the present invention adopts less than 115 DEG C long-time agings, reaches 96 hours most, and GP district is fully separated out, and obtains the GP district of even dispersion distribution; In the artificial aging T6 carried out subsequently, T73, T74, T76, T77, T78 and T79 process, will the GP block reservation of part relative small size be had to get off, or the GP district of reduced size postpone the transformation to η ' phase and η phase.Thus improve material peak value aging strength or overaging tenacity over-all properties.
The Technology that the present invention relates to is applicable to production aerospace, boats and ships and automobile slab, thin plate, forging and squeeze wood.
Embodiment
Below with reference to embodiment, technical solution of the present invention is further described:
Produce qualified Al-Zn-Mg-Cu aluminum alloy material, the chemical composition of this alloy and weight percent are: Zn5.0 ~ 12.0%, Mg1.2 ~ 3.2%, Cu1.0 ~ 3.0%, Zr0.04 ~ 0.30% or Cr0.10 ~ 0.40%, Si≤0.50%, Fe≤0.50%, Ti≤0.10%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
Production craft step is as follows:
(1) founding, homogenizing production process is completed with reference to 7050 aluminium alloys;
(2) complete forging with reference to 7050 aluminium alloys or extrude or roll forming operation;
(3) quenching process is completed with reference to 7050 aluminium alloys;
Table 1 carries out for adopting the above-mentioned Al-Zn-Mg-Cu aluminum alloy of technical solution of the present invention the processing parameter strengthening tough timeliness
Table 1:
Table 2 is that the another kind of above-mentioned Al-Zn-Mg-Cu aluminum alloy of technical solution of the present invention that adopts carries out the processing parameter strengthening tough timeliness, and wherein, preageing adopts the mode of staged heating and thermal insulation to complete.
Table 2:
Table 3 is that the another kind of above-mentioned Al-Zn-Mg-Cu aluminum alloy of technical solution of the present invention that adopts carries out the processing parameter strengthening tough timeliness, and wherein, preageing adopts continuous warming, the mode of insulation completes.Alloy is 15h ~ 2400h 45 DEG C ~ 90 DEG C temperature range heating total times; At 91 DEG C ~ 180 DEG C
Temperature range heating total time is 4h ~ 96h.
Table 3:
By two kinds of alloy materials difference called after XHJ-5 and XHJ-6 containing Zr or Cr in above-mentioned Al-Zn-Mg-Cu aluminum alloy, adopt traditional T6 technique to carry out ageing treatment, the material mechanical performance after process is in table 4.
Table 4:
Table 5 is for the L obtained after the process of XHJ-5 and XHJ-6 alloy material employing technical solution of the present invention is to material property.
Table 5:
| Alloy | σ b，MPa | σ 0.2，MPa | δ 5，% | γ，%IACS | |
| XHJ-6 | 750 | 731 | 10.2 | 32.0 | |
| XHJ-6 | 778 | 760 | 8.3 | 33.1 | |
| XHJ-6 | 760 | 752 | 8.3 | 34.2 | |
| XHJ-6 | 758 | 746 | 8.6 | 35.6 | |
| XHJ-6 | 754 | 751 | 7.6 | 34.9 | |
| XHJ-5 | 778 | 742 | 9.3 | 30.2 | |
| XHJ-5 | 779 | 748 | 8.9 | 31.2 | |
| XHJ-5 | 773 | 745 | 8.3 | 31.2 | |
| XHJ-5 | 776 | 752 | 10.2 | 31.3 | |
| XHJ-5 | 776 | 753 | 9.1 | 30.1 | |
| XHJ-5 | 743 | 721 | 10.1 | 36.0 | |
| XHJ-5 | 772 | 757 | 9.2 | 32.6 | |
| XHJ-5 | 738 | 721 | 9.5 | 35.9 | |
| XHJ-5 | 742 | 722 | 10.2 | 35.2 |
Contrast table 5 and table 4 testing data known, adopt the intensity of the alloy material of technical solution of the present invention process to significantly improve.Compared with prior art, the alloy material of technical solution of the present invention process is adopted can to ensure the tough coupling over-all properties of the height of material.
Claims (6)
1. an Al-Zn-Mg-Cu aluminum alloy strengthens tough aging process, it is characterized in that: the method increases preageing before Al-Zn-Mg-Cu aluminum alloy T6, T74, T73, T76, T77, T78 or T79 artificial aging technique, the Heating temperature of preageing system is 80 DEG C ~ 115 DEG C, and the preageing time is 4 ~ 96 hours.
2. Al-Zn-Mg-Cu aluminum alloy according to claim 1 strengthens tough aging process, it is characterized in that: preageing system adopts continuously or the mode of staged heating and thermal insulation completes.
3. Al-Zn-Mg-Cu aluminum alloy according to claim 1 strengthens tough aging process, it is characterized in that: the Heating temperature of preageing system is 80 DEG C ~ 89 DEG C, and the preageing time is 4 ~ 96 hours.
4. Al-Zn-Mg-Cu aluminum alloy according to claim 1 strengthens tough aging process, it is characterized in that: the Heating temperature of preageing system is 90 DEG C ~ 99 DEG C, and the preageing time is 20 ~ 60 hours.
5. Al-Zn-Mg-Cu aluminum alloy according to claim 1 strengthens tough aging process, it is characterized in that: the Heating temperature of preageing system is 100 DEG C ~ 115 DEG C, and the preageing time is 4 ~ 24 hours.
6. Al-Zn-Mg-Cu aluminum alloy according to claim 1 strengthens tough aging process, it is characterized in that: the chemical composition of Al-Zn-Mg-Cu aluminum alloy and weight percent are: Zn 5.0 ~ 12.0%, Mg 1.2 ~ 3.2%, Cu 1.0 ~ 3.0%, Zr 0.04 ~ 0.30% or Cr0.10 ~ 0.40%, Si≤0.50%, Fe≤0.50%, Ti≤0.10%, other impurity is single≤and 0.05%, total amount≤0.15%, surplus is Al.
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| CN103898382B (en) * | 2014-03-27 | 2017-01-04 | 北京科技大学 | Superpower high-ductility corrosion Al Zn Mg Cu aluminum alloy materials and preparation method thereof |
| CN104789836B (en) * | 2014-05-07 | 2017-05-24 | 天长市正牧铝业科技有限公司 | Lightweight high-strength aluminum alloy |
| CN104004946B (en) * | 2014-06-06 | 2016-03-30 | 江苏大学 | 690-730MPa superstrength 80-100mm hardening capacity aluminium alloy and preparation method thereof |
| CN104004947B (en) * | 2014-06-06 | 2016-05-04 | 江苏大学 | High anti intercrystalline corrosion aluminium alloy of 600-650MPa intensity and preparation method thereof |
| CN104404321B (en) * | 2014-11-26 | 2016-08-24 | 中国石油天然气集团公司 | A kind of ultradeep well ultrahigh-strength aluminum alloy drill pipe body and manufacture method thereof |
| CN107937776A (en) * | 2017-12-29 | 2018-04-20 | 西南铝业（集团）有限责任公司 | A kind of strong 7 line aluminium alloy material of inexpensive superelevation for heavy haul train draw bar |
| RU2757280C1 (en) * | 2018-06-12 | 2021-10-12 | Алерис Роллд Продактс Джермани Гмбх | Method for manufacturing plate product made of aluminum alloy of 7xxx series, which has improved fatigue resistance |
| CN109136510A (en) * | 2018-09-30 | 2019-01-04 | 李明珠 | A kind of corrosion-resistant sound insulation and noise reduction composite board and preparation method thereof |
| CN111455197B (en) * | 2020-04-07 | 2021-09-07 | 台山市金桥铝型材厂有限公司 | Preparation method of Al-Zn-Mg alloy |
| CN115386752A (en) * | 2022-09-06 | 2022-11-25 | 昆明冶金研究院有限公司 | Manufacturing method of aluminum alloy forging for automobile suspension part and automobile suspension forging |
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| DE1950498A1 (en) * | 1969-10-07 | 1971-05-06 | Kaiser Aluminium Chem Corp | Heat treatment for aluminium alloy - armour plate |
| JPS62142753A (en) * | 1985-12-16 | 1987-06-26 | Showa Alum Corp | Heat treatment of 7000 type aluminum alloy |
| CN101792891B (en) * | 2010-04-28 | 2011-04-27 | 中南大学 | Aging treatment process of Al-Zn-Mg-Cu aluminum alloy |
| CN103180471B (en) * | 2010-11-05 | 2016-01-13 | 阿莱利斯铝业迪弗尔私人有限公司 | The method of structural partsof automobiles is manufactured by the Al-Zn alloy of rolling |
| CN102409272A (en) * | 2011-11-22 | 2012-04-11 | 中国航空工业集团公司北京航空材料研究院 | Strengthening and toughening aging process for Al-Zn-Mg-Cu-series aluminum alloy |
| CN102796974B (en) * | 2012-08-13 | 2013-12-18 | 北京有色金属研究总院 | Improved 7000 series aluminum alloy double-stage overaging heat treatment technology |
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