CN102465219A - Method for development of ultrahigh-strength ultrahigh-toughness aluminum alloy - Google Patents
Method for development of ultrahigh-strength ultrahigh-toughness aluminum alloy Download PDFInfo
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- CN102465219A CN102465219A CN2010105316303A CN201010531630A CN102465219A CN 102465219 A CN102465219 A CN 102465219A CN 2010105316303 A CN2010105316303 A CN 2010105316303A CN 201010531630 A CN201010531630 A CN 201010531630A CN 102465219 A CN102465219 A CN 102465219A
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Abstract
The invention relates to a method for development of an ultrahigh-strength ultrahigh-toughness aluminum alloy. The method utilizes an Al-Zn-Mg-Cu alloy as a base material. Through the method, a ratio of main alloy elements is optimized; types and content of added elements are determined; and the research on trace impurity element existence forms and action mechanisms, melt purification, a casting and solidification technology, a deformation and heat treatment technology, and an ultrahigh-strength aluminum alloy application technology is realized.
Description
[technical field]
The present invention relates to the ultra by force toughness duraluminum of a kind of superelevation method of production, especially the aldural of aerospace industry extensive application is main still for being similar to LC4, LC9, the LD10 of Russia B95 Ц and U.S. 7075,2014 alloys.Though also begin in recent years 7050 aldurals such as grade are studied, still be conceived to improve the toughness and the corrosion resistance of alloy mostly, their intensity then still maintains on the level of 7075-T6 mostly, even also has reduction in various degree.
[background technology]
Duraluminum with superstrength of industrial significance belongs to the Al-Zn-Mg-Cu alloy.The subject matter that such alloy exists is to obtain the high-intensity while through high-alloying, and the plasticity and the solidity to corrosion of alloy are poor, is prone to produce stress corrosion crack.Find the initial stage as far back as Al-Zn-Mg-Cu living expenses high-strength alloy, people just recognize this problem, and set about studying.After this up to the fifties, states such as moral, day, Russia, English, U.S.A have launched big quantity research around the particularly effect of Cu, Mn, Cr of alloying, and forming with 7075 is the high-strength Al-Zn-Mg-Cu alloy series of representative.
[summary of the invention]
With B96 Ц alloy with the extruded tube form in order to make small-sized air-to-air missile, also make the intermediate range missile housing parts in addition with the form of forging.At present, Russia can make with the quiet strong worker of B96 Ц type alloy and reach 700MPa (σ
b) and 650MPa (σ
0.2).B96 Ц type alloy development trend from now on is further to improve intensity in the prerequisite of improving its plasticity, to satisfy the higher design requirements (σ of guided missile
b=750MPa).Because low being only limited on the small sized product of process plastic used.
The technical problem that the present invention will solve provides the ultra by force toughness duraluminum of a kind of superelevation method of production
For solving the problems of the technologies described above, technical scheme that the present invention adopts is:
The research purpose of this patent is that development tensile strength is 770MPa, unit elongation 10%, has the ultra-high-strength/tenacity aluminum alloy of excellent comprehensive performance, and its performance index surpass the index of domestic and international similar alloy.
1) adopting high-alloying is the inevitable choice that reaches the high-strength and high ductility performance.The Al-Zn-Mg-Cu alloy of high alloy concentration; High because of alloying element content, being prone to segregation, strand, to dissolve eutectic phase many; Casting and hot rolling cogging are easy to crack to be the bottleneck problem that practical application is moved towards in such alloy preparation of restriction, and grain refining and homogenizing are the keys that addresses the above problem.
2) opening the core of making ultra-high-strength/tenacity aluminum alloy is how to realize intensity and flexible overall equilbrium.Use the synergistic combination effect of multiple highly malleablized mechanism, the global design of alloying constituent and the finely regulating of microtexture are the keys of development ultra-high-strength/tenacity aluminum alloy.
3) relation of research material and liquid hydrogen, liquid oxygen prevents the hydrogen embrittlement tendency, makes material have good low-temperature performance, welding property and other over-all properties.
4) improve use characteristics and shaping processability ability, prevent casting, forging, rolling crack, produce big products.
[embodiment]
With the miniaturization of Solid State Structure and the accuracy controlling of heterogeneous multistage strengthening phase form and distribution is guiding; Adopt means such as suitable thermal treatment and multistage aging; Make strengthening phase size multipolarity topology distribution; Precipitated phase and solute distribution and grain boundary structure and distribution of orientations near the control crystal boundary realize that multiple disperse phase separates out the optimization with intracrystalline, grain boundary structure.Specifically be, carry out two-stage time effect being lower than and being higher than GP district solvus temperature, obtain transition precipitated phase very tiny and that the high-density disperse distributes, reach best strengthening effect.Obtain an amount of thick precipitated phase simultaneously with the raising preliminary work hardening rate, and make the viscous deformation homogenizing.
Claims (4)
1. the ultra by force toughness duraluminum of superelevation method of production:
2. ultra process plastic novel process;
3. strengthen the high temperature deformation novel process;
4. reinforced metal streamline novel process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105316303A CN102465219A (en) | 2010-11-04 | 2010-11-04 | Method for development of ultrahigh-strength ultrahigh-toughness aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105316303A CN102465219A (en) | 2010-11-04 | 2010-11-04 | Method for development of ultrahigh-strength ultrahigh-toughness aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102465219A true CN102465219A (en) | 2012-05-23 |
Family
ID=46069337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105316303A Pending CN102465219A (en) | 2010-11-04 | 2010-11-04 | Method for development of ultrahigh-strength ultrahigh-toughness aluminum alloy |
Country Status (1)
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| CN (1) | CN102465219A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255431A (en) * | 2017-06-15 | 2017-10-17 | 中南大学 | A kind of anti-yaw damper aluminium alloy cartridge and preparation method thereof |
-
2010
- 2010-11-04 CN CN2010105316303A patent/CN102465219A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255431A (en) * | 2017-06-15 | 2017-10-17 | 中南大学 | A kind of anti-yaw damper aluminium alloy cartridge and preparation method thereof |
| CN107255431B (en) * | 2017-06-15 | 2019-04-19 | 中南大学 | A kind of anti-ablation aluminium alloy cartridge and preparation method thereof |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120523 |