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Preparation method of in situ micro-nano particle reinforced al-cu-mg-si alloy sheet in melt

An al-cu-mg-si, micro-nano particle technology, applied in the field of alloy sheet preparation, can solve the problems of restricting the development and application of aluminum alloys, poor creep resistance, low high temperature strength, etc. Large, improved mechanical properties, large number of effects

Active Publication Date: 2020-05-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, aluminum alloys have the disadvantages of low high temperature strength, poor creep resistance and low elastic modulus. Traditional alloying, plastic deformation and heat treatment methods cannot solve the above problems, and the above problems have become the bottleneck in the field of aluminum alloy research. Therefore, the further development and application of aluminum alloys are seriously restricted.

Method used

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  • Preparation method of in situ micro-nano particle reinforced al-cu-mg-si alloy sheet in melt
  • Preparation method of in situ micro-nano particle reinforced al-cu-mg-si alloy sheet in melt

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A method for preparing an Al-Cu-Mg-Si alloy sheet strengthened by in-situ micro-nano particles in a melt, the specific method is as follows:

[0051] Step 1, prepare Al-Ti-B 4 C system compact:

[0052] (1)B 4 Ball milling activation pretreatment of C powder: the particle size is 2.6μmB 4 C powder is put into the ball mill tank; the ball-to-material ratio is 100:1, and ball milled for 3 hours at a ball milling speed of 200r / min;

[0053] (2) Al alloy powder with a particle size of 45 μm, Ti powder with a particle size of 25 μm and B after ball milling 4 C powder mixed into 100g, Al alloy powder: 70.3wt.%; Ti powder: 21.4wt.%; B 4 C powder: 8.3wt.%; put 100g of the mixed powder into the ball mill tank in the mixer, and mix for 36 hours at a speed of 60r / min;

[0054] Among them, in addition to aluminum Al, the composition of the aluminum alloy powder is: copper Cu: 4.2%; magnesium Mg: 0.7%; silicon Si: 1%; zinc Zn: 0.15%; manganese Mn: 0.6%; titanium Ti: 0.1%; Nick...

Embodiment 2

[0072] A method for preparing an Al-Cu-Mg-Si alloy sheet strengthened by in-situ micro-nano particles in a melt, the specific method is as follows:

[0073] Step 1, prepare Al-Ti-B4 C system compact:

[0074] (1)B 4 Ball mill activation pretreatment of C powder: the particle size is 1.2μmB 4 C powder is put into the ball mill jar; the ball-to-material ratio is 100:1, and ball milled for 1.5 hours at a ball milling speed of 260r / min;

[0075] (2) Al alloy powder with a particle size of 60 μm, Ti powder with a particle size of 15 μm and B after ball milling 4 C powder mixed to 3.86kg, Al alloy powder: 74.1wt.%; Ti powder: 18.7wt.%; B 4 C powder: 7.2wt.%; put 3.86kg of mixed powder into the ball mill tank in the mixer, and mix for 8 hours at a speed of 30r / min;

[0076] Among them, in addition to aluminum Al, the composition of the aluminum alloy powder is: Copper Cu: 4.4%; Magnesium Mg: 0.6%; Silicon Si: 0.7%; Zinc Zn: 0.2%; Manganese Mn: 0.6%; Titanium Ti: 0.1%; Nickel Ni:...

Embodiment 3

[0094] A method for preparing an Al-Cu-Mg-Si alloy sheet strengthened by in-situ micro-nano particles in a melt, the specific method is as follows:

[0095] Step 1, prepare Al-Ti-B 4 C system compact:

[0096] (1)B 4 Ball milling activation pretreatment of C powder: the particle size is 2.9μmB 4 C powder is put into the ball mill tank; the ball-to-material ratio is 100:1, and ball milled for 2 hours at a ball milling speed of 300r / min;

[0097] (2) Al alloy powder with a particle size of 15 μm, Ti powder with a particle size of 45 μm and B after ball milling 4 C powder mixed into 505g, Al alloy powder: 80.2wt.%; Ti powder: 14.3wt.%; B 4 C powder: 5.5wt.%; put 505g of the mixed powder into the ball mill tank in the mixer, and mix for 24 hours at a speed of 80r / min;

[0098] Among them, in addition to aluminum Al, the composition of the aluminum alloy powder is: Copper Cu: 3.9%; Magnesium Mg: 0.5%; Silicon Si: 1.1%; Zinc Zn: 0.8%; Manganese Mn: 0.9%; Titanium Ti: 0.12%; Ni...

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Abstract

The invention provides a method for preparing Al-Cu-Mg-Si alloy plates strengthened by in-situ micro-nano particles in the melt, which utilizes Al-Ti-B to induce Al-Ti-B in the alloy melt 4 In situ self-propagating reaction in C system to generate micro-nano TiC‑TiB 2 Ceramic particles, TiC‑TiB 2 Ceramic particles are generated directly in situ in the melt, compared to externally added particles, TiC‑TiB 2 The dispersion effect of ceramic particles is better, the interface between the particles and the matrix is ​​clean and pollution-free, and there is no harmful interface reaction, which avoids the disadvantages of uneven particle dispersion and harmful interface pollution. When strengthening Al‑Cu‑Mg‑Si alloys, micronano TiC‑TiB 2 Ceramic particles can act as the heterogeneous nucleation core of ɑ-Al, promote the heterogeneous nucleation of ɑ-Al, increase the nucleation rate, and improve the strength of the alloy through grain refinement without reducing its strength. plasticity.

Description

technical field [0001] The invention belongs to the technical field of alloy sheet preparation, in particular to a method for preparing Al-Cu-Mg-Si alloy sheet reinforced with in-situ micro-nano particles in a melt. Background technique [0002] Aluminum alloy has many advantages such as low density, high specific strength, and easy processing and forming. It is the most widely used lightweight structural material and has become the first choice for lightweight structural materials in the aerospace and automotive industries. However, aluminum alloys have the disadvantages of low high temperature strength, poor creep resistance and low elastic modulus. Traditional alloying, plastic deformation and heat treatment methods cannot solve the above problems, and the above problems have become the bottleneck in the field of aluminum alloy research. Therefore, the further development and application of aluminum alloys are seriously restricted. Contents of the invention [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C1/06C22C21/18C22C21/16C22C32/00C22F1/057
CPCC22C1/06C22C1/1015C22C1/1036C22C21/14C22C21/16C22C21/18C22C32/0047C22F1/057C22C1/1052
Inventor 邱丰刘天舒赵建融杨宏宇
Owner JILIN UNIV
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