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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: 2019-04-16
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

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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 preparation method of an in-situ micro-nano particle-reinforced Al-Cu-Mg-Si alloy sheet in a melt, which utilizes an in-situ self-propagation reaction in an Al-Ti-B4C system in an alloy melt to form micro-nano TiC-TiB2 ceramic particles, and TiC-TiB2 ceramic particles are directly formed in situ in the melt directly. Compared with the added particles, the dispersion effectof TiC-TiB2 ceramic particles is better, and the interface between the particles and a substrate is clean and pollution-free without harmful interface reaction, thus avoiding the disadvantages of uneven particle dispersion and harmful interface pollution. When the Al-Cu-Mg-Si alloy is reinforced, the micro-nano TiC-TiB2 ceramic particles can serve as the heterogeneous nucleation core of alpha-Al,promote the heterogeneous nucleation of alpha-Al, improve the nucleation rate, and thus increases the strength of the alloy pass through the crystal grain refinement and does not reduce plasticity while increasing strength.

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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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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