CN109055794A - A kind of T7X heat treatment method of high strength alumin ium alloy rivet - Google Patents
A kind of T7X heat treatment method of high strength alumin ium alloy rivet Download PDFInfo
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- CN109055794A CN109055794A CN201811171875.2A CN201811171875A CN109055794A CN 109055794 A CN109055794 A CN 109055794A CN 201811171875 A CN201811171875 A CN 201811171875A CN 109055794 A CN109055794 A CN 109055794A
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- rivet
- treatment
- temperature
- quenching
- heat treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
Abstract
The present invention is a kind of T7X heat treatment method of high strength alumin ium alloy rivet, belongs to field of aluminum alloy heat treatment technology, can be applied to the heat treatment of aviation alloyed aluminium rivet.Technology of the invention is the following steps are included: solid solution, quenching, cold cycling, timeliness, and the present invention in traditional T73 heat treating regime to being improved.The reason of rivet shear performance is unqualified and rivets problem of Cracking is that rivet internal stress is higher and rivet obtains toughness decline after high intensity.In order to reduce the quenching stress of rivet, improve rivet performance, quenching liquid temperature using solvent quenching liquid and is increased to 40 DEG C~50 DEG C by traditional room temperature by the present invention, and cold cycling treatment technique is added.It is distributed to obtain precipitated phase and refined in transgranular disperse, the interrupted nodularization distribution of Grain Boundary Precipitates, present invention employs three-step aging techniques, improve the matching relationship of rivet performance and toughness；Obtain the T7X heat treating regime for being suitable for high strength alumin ium alloy rivet.
Description
Technical field
The present invention is a kind of T7X heat treatment method of high strength alumin ium alloy rivet, belongs to field of aluminum alloy heat treatment technology, can
To be applied to the heat treatment of aviation alloyed aluminium rivet.
Background technique
High strength alumin ium alloy rivet is widely used in aerospace field, realizes structural weight reduction, high reliability, can repair
Property.Rivet needs to be heat-treated after pier nose forming, and staking process is carried out after heat treatment.Heat treatment process is to determine the power of rivet
It learns performance and rivets the important process of forming property, deal with improperly and easily cause riveting cracking phenomena.It is directed to currently, the country lacks
The dedicated heat treating regime of high strength alumin ium alloy rivet, existing T73 heat treating regime are as follows: solid solubility temperature: 471 DEG C~482 DEG C, room temperature
Water quenching；+ 177 DEG C of 121 DEG C of two-stage time effect/(4h~for 24 hours)/(6h~12h), heats up between level-one timeliness and secondary time effect with furnace.
There is the phenomenon that undesirable and riveting is cracked for the cutting performance of rivet part in the heat treating regime.
Summary of the invention
The present invention for rivet performance present in above-mentioned existing heat treatment process be not able to satisfy requirement deficiency and
A kind of specific process of the T7X heat treatment of high strength alumin ium alloy rivet is devised, the purpose is to make the mechanical property of rivet and riveting
It connects forming property and reaches good matching.
The purpose of the present invention is achieved through the following technical solutions:
Technology is the following steps are included: solid solution, quenching, cold cycling, timeliness, which is characterized in that
(1) solution treatment: rivet solid solution temperature is 471 DEG C~482 DEG C；
(2) quench: quenching liquid is 20%~30% polyethylene glycol organic solvent, and temperature is 40 DEG C~50 DEG C；
(3) 2 cold cycling treatments, the 1st cold cycling treatment: deep cooling cold cycling treatment: are used after rivet quenching
Treatment temperature is -180 DEG C, soaking time 5h, then carries out ageing treatment, 120 DEG C of aging temp, keeps the temperature 5h；2nd time cold and hot to follow
Ring processing: subzero treatment temperature is -150 DEG C, soaking time 3h；
(4) ageing treatment: three-step aging process is used, 120 DEG C of level-one aging temp, keeps the temperature 5h；Level-one timeliness arrives
Secondary time effect slowly heats up, 15 DEG C of heating rate~20 DEG C/h；Secondary time effect: 160 DEG C~170 DEG C of aging temp, soaking time
Φ 3mm~Φ 6mm:3h；Secondary time effect is to three-step aging heating rate: heating up with furnace；Three-step aging: 175 DEG C of aging temp~
185 DEG C, soaking time Φ 3mm~Φ 4mm:2h~3h；Φ 5mm~Φ 6mm:4h~5h.
The specific method is as follows for the quenching of the step 2: after rivet solution treatment is come out of the stove, be immediately placed in temperature be 40 DEG C~
In 50 DEG C of quenching liquid, quenching shift time is no more than 15s, and quenching liquid is 20%~30% polyethylene glycol organic solvent；It is quenching
Teetertotter 10min~15min in fiery slot, until rivet temperature is consistent with quenching liquid temperature.
The specific method is as follows for 2 cold cycling treatments of the step 3:
1st time: the deep cooling box that quenched rivet is immediately placed in -180 DEG C is subjected to subzero treatment, after soaking time 5h,
It is transferred to immediately after coming out of the stove from deep cooling box in 120 DEG C of aging furnace and carries out ageing treatment, timeliness soaking time is 5h；
2nd time: the deep cooling box that the rivet after timeliness is immediately placed in -150 DEG C is subjected to subzero treatment, soaking time 3h.
The present invention has the advantage that: the present invention in traditional T73 heat treating regime to being improved.Rivet shear performance is not
The reason of qualified and riveting problem of Cracking is that rivet internal stress is higher and rivet obtains toughness decline after high intensity.In order to reduce
The quenching stress of rivet improves rivet performance, and the present invention is using solvent quenching liquid and by quenching liquid temperature by traditional room temperature
40 DEG C~50 DEG C are increased to, and cold cycling treatment technique is added.It is distributed to obtain precipitated phase and refined in transgranular disperse, crystal boundary
The interrupted nodularization distribution of precipitated phase, present invention employs three-step aging techniques, improve the matching relationship of rivet performance and toughness；It obtains
Obtained the T7X heat treating regime for being suitable for high strength alumin ium alloy rivet.
The present invention has carried out the heat treatment process such as solid solution, quenching, cold cycling treatment, timeliness for high strength alumin ium alloy rivet
Research, and by the test and verifying of multiple batches of rivet, obtain the optimal heat treatment process side high strength alumin ium alloy rivet T7X
Method realizes rivet mechanical property and rivets the matched well of forming property.
Specific embodiment
Technical solution of the present invention is further described below with reference to embodiment:
Embodiment:
(1) the high strength alumin ium alloy rivet for selecting Φ 5mm specification, using T7X heat treating regime of the invention, the mechanics of acquisition
Performance and riveting forming property etc. are all satisfied requirement.Experimental result is shown in Table 1.
Table 1
(2) select Φ 3mm, Φ 4mm, Φ 5mm, Φ 6mm specification high strength alumin ium alloy rivet, using second level of the invention and
Three-step aging parameter, solid solubility temperature select 475 DEG C, and quenching liquid uses 40 DEG C~50 DEG C of 20%~30% polyglycols solution, obtains
The test results such as the mechanical property and riveting forming property that obtain are all satisfied design requirement.Experimental result is shown in Table 2.
Table 2
Comparative example:
The parameter that table 3 gives T73 technique in current document carries out mechanical property result and riveting after rivet heat treatment
There is the phenomenon that unqualified shear strength or riveting forming cracking in forming results after heat treatment.
Table 3
Claims (3)
1. a kind of high strength alumin ium alloy rivet T7X heat treatment method, technology is the following steps are included: solid solution, quenching, cold and hot follow
Ring, timeliness, which is characterized in that
(1) solution treatment: rivet solid solution temperature is 471 DEG C~482 DEG C；
(2) quench: quenching liquid is 20%~30% polyethylene glycol organic solvent, and temperature is 40 DEG C~50 DEG C；
(3) 2 cold cycling treatments, the 1st cold cycling treatment: subzero treatment cold cycling treatment: are used after rivet quenching
Temperature is -180 DEG C, soaking time 5h, then carries out ageing treatment, 120 DEG C of aging temp, keeps the temperature 5h；At 2nd cold cycling
Reason: subzero treatment temperature is -150 DEG C, soaking time 3h；
(4) ageing treatment: three-step aging process is used, 120 DEG C of level-one aging temp, keeps the temperature 5h；Level-one timeliness is to second level
Timeliness slowly heats up, 15 DEG C of heating rate~20 DEG C/h；Secondary time effect: 160 DEG C~170 DEG C of aging temp, soaking time Φ 3mm
~Φ 6mm:3h；Secondary time effect is to three-step aging heating rate: heating up with furnace；Three-step aging: 175 DEG C~185 DEG C of aging temp,
Soaking time Φ 3mm~Φ 4mm:2h~3h；Φ 5mm~Φ 6mm:4h~5h.
2. a kind of high strength alumin ium alloy rivet T7X heat treatment method according to claims 1, it is characterised in that；Second step is quenched
Fire, the specific method is as follows: after rivet solution treatment is come out of the stove, being immediately placed in the quenching liquid that temperature is 40 DEG C~50 DEG C, quenching turns
Shift time is no more than 15s, and quenching liquid is 20%~30% polyethylene glycol organic solvent；Teetertotter in quenching tank 10min~
15min, until rivet temperature is consistent with quenching liquid temperature.
3. a kind of high strength alumin ium alloy rivet T7X heat treatment method according to claims 1, it is characterised in that: third step 2 times
Cold cycling treatment, the specific method is as follows:
1st time: the deep cooling box that quenched rivet is immediately placed in -180 DEG C being subjected to subzero treatment, after soaking time 5h, from depth
Ice chest, which is transferred to immediately in 120 DEG C of aging furnace after coming out of the stove, carries out ageing treatment, and timeliness soaking time is 5h；
2nd time: the deep cooling box that the rivet after timeliness is immediately placed in -150 DEG C is subjected to subzero treatment, soaking time 3h.
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| CN201811171875.2A CN109055794B (en) | 2018-10-09 | 2018-10-09 | T7X heat treatment method for high-strength aluminum alloy rivet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029297A (en) * | 2019-05-17 | 2019-07-19 | 广东和胜工业铝材股份有限公司 | Aluminum alloy and quenching post-treatment method thereof |
| CN110952047A (en) * | 2019-11-28 | 2020-04-03 | 湖南恒佳新材料科技有限公司 | Heat treatment process for high-quality aluminum alloy material |
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| US20040140019A1 (en) * | 2003-01-22 | 2004-07-22 | The Boeing Company | Method for preparing rivets from cryomilled aluminum alloys and rivets produced thereby |
| US20050109158A1 (en) * | 2003-11-25 | 2005-05-26 | The Boeing Company | Method for preparing ultra-fine, submicron grain titanium and titanium-alloy articles and articles prepared thereby |
| CN103628007A (en) * | 2013-12-03 | 2014-03-12 | 葛鹏 | New method for eliminating aluminium alloy workpiece residual stress |
| CN104726656A (en) * | 2013-12-20 | 2015-06-24 | 北京有色金属研究总院 | Water-soluble quenching medium for aluminum alloy precision part |
| CN106319404A (en) * | 2015-06-18 | 2017-01-11 | 张家港市丰乐汽车设备有限公司 | Three stage aging heat treatment method for aluminum alloy |
| CN106498245A (en) * | 2016-10-09 | 2017-03-15 | 江苏大学 | A kind of high-strength cast aluminum-silicon alloy of subzero treatment reinforcing and its preparation technology |
| CN108149172A (en) * | 2017-12-26 | 2018-06-12 | 湖南科技大学 | A kind of processing method of fine grain cubic texture corrosion fatigue resistant aluminum alloy plate materials |
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2018
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040140019A1 (en) * | 2003-01-22 | 2004-07-22 | The Boeing Company | Method for preparing rivets from cryomilled aluminum alloys and rivets produced thereby |
| US20050109158A1 (en) * | 2003-11-25 | 2005-05-26 | The Boeing Company | Method for preparing ultra-fine, submicron grain titanium and titanium-alloy articles and articles prepared thereby |
| CN103628007A (en) * | 2013-12-03 | 2014-03-12 | 葛鹏 | New method for eliminating aluminium alloy workpiece residual stress |
| CN104726656A (en) * | 2013-12-20 | 2015-06-24 | 北京有色金属研究总院 | Water-soluble quenching medium for aluminum alloy precision part |
| CN106319404A (en) * | 2015-06-18 | 2017-01-11 | 张家港市丰乐汽车设备有限公司 | Three stage aging heat treatment method for aluminum alloy |
| CN106498245A (en) * | 2016-10-09 | 2017-03-15 | 江苏大学 | A kind of high-strength cast aluminum-silicon alloy of subzero treatment reinforcing and its preparation technology |
| CN108149172A (en) * | 2017-12-26 | 2018-06-12 | 湖南科技大学 | A kind of processing method of fine grain cubic texture corrosion fatigue resistant aluminum alloy plate materials |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110029297A (en) * | 2019-05-17 | 2019-07-19 | 广东和胜工业铝材股份有限公司 | Aluminum alloy and quenching post-treatment method thereof |
| CN110952047A (en) * | 2019-11-28 | 2020-04-03 | 湖南恒佳新材料科技有限公司 | Heat treatment process for high-quality aluminum alloy material |
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