Transgranular grain boundary distribution micro-nano complex particle reinforced aluminum base composite material and preparation method thereof

A particle-reinforced aluminum and composite material technology, which is applied in the field of advanced metal matrix composite material preparation, can solve the problems of reducing material plasticity and toughness, potential safety hazards, particle segregation, etc., and achieves accelerated reaction process, reduced production cost, and uniform organization Effect

Active Publication Date: 2019-09-13
咸阳瞪羚谷新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the distribution of a single small-size reinforcing phase in the aluminum melt has a clear tendency during solidification, which is likely to cause particle segregation (for example, ceramic particles are mostly segregated at the α-Al grain boundary, and the smaller the particle size, the segregation The more serious), seriously reducing the plastic toughness of the material, causing potential safety hazards and restricting its promotion and use

Method used

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  • Transgranular grain boundary distribution micro-nano complex particle reinforced aluminum base composite material and preparation method thereof
  • Transgranular grain boundary distribution micro-nano complex particle reinforced aluminum base composite material and preparation method thereof
  • Transgranular grain boundary distribution micro-nano complex particle reinforced aluminum base composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Step 1: Put K 2 TiF 6 The powder is added to the pure aluminum melt at a temperature of 750°C, and at the same time, the Nb-Zr alloy ultrasonic amplitude rod is immersed in the melt, and the ultrasonic treatment is performed for 10 minutes, with an ultrasonic power of 1.2kW, to remove liquid molten salt impurities on the surface of the melt, and after pouring, it is obtained Al-Al 3 Ti master alloy, the resulting Al-Al 3 Al in Ti master alloy 3 The mass fraction of Ti particles is 10%.

[0037] Step 2: Put K 2 TiF 6 、KBF 4 The powders were mixed according to the molar ratio of 1:2, and after being fully mixed, they were then added to the pure aluminum melt at a temperature of 800 °C. At the same time, the Nb-Zr alloy ultrasonic amplitude rod was immersed in the melt, and the ultrasonic treatment was performed for 10 minutes. The ultrasonic power was 1.2kW, remove liquid molten salt impurities on the surface of the melt, and obtain Al-TiB after casting 2 master a...

Embodiment 2

[0043] Step 1: Put K 2 TiF 6 The powder is added to the pure aluminum melt at a temperature of 800°C, and at the same time, the Nb-Zr alloy ultrasonic amplitude rod is immersed in the melt, ultrasonically treated for 5 minutes, and the ultrasonic power is 1.5kW, to remove liquid molten salt impurities on the surface of the melt, and after pouring, it is obtained Al-Al 3 Ti master alloy, the resulting Al-Al 3 Al in Ti master alloy 3 The mass fraction of Ti particles is 15%.

[0044] Step 2: Put K 2 TiF 6 、KBF 4 The powders were mixed according to the molar ratio of 1:2. After being fully mixed, they were then added to the pure aluminum melt at a temperature of 850 ° C. At the same time, the Nb-Zr alloy ultrasonic amplitude rod was immersed in the melt, and the ultrasonic treatment was performed for 5 minutes. The ultrasonic power was 1.2kW, remove liquid molten salt impurities on the surface of the melt, and obtain Al-TiB after casting 2 master alloy, the resulting Al-T...

Embodiment 3

[0047] Step 1: Put K 2 TiF 6 The powder is added to the pure aluminum melt at a temperature of 700 ° C, and at the same time, the Nb-Zr alloy ultrasonic amplitude rod is immersed in the melt, and the ultrasonic treatment is performed for 10 minutes with an ultrasonic power of 1.0kW to remove liquid molten salt impurities on the surface of the melt. Al-Al 3 Ti master alloy, the resulting Al-Al 3 Al in Ti master alloy 3 The mass fraction of Ti particles is 8%.

[0048] Step 2: Put K 2 TiF 6 、KBF 4 The powders were mixed according to the molar ratio of 1:2. After being fully mixed, they were then added to the pure aluminum melt at a temperature of 750 °C. At the same time, the Nb-Zr alloy ultrasonic amplitude rod was immersed in the melt, and the ultrasonic treatment was performed for 8 minutes. The ultrasonic power was 1.5kW, remove liquid molten salt impurities on the surface of the melt, and obtain Al-TiB after casting 2 master alloy, the resulting Al-TiB 2 TiB in mas...

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Abstract

The invention discloses a transgranular grain boundary distribution micro-nano complex particle reinforced aluminum base composite material and a preparation method thereof. Firstly, K2TiF6 powder isfed in a pure aluminum melt to prepare an uniform-structured Al-Al3Ti intermediate alloy through assistance by ultrasonic stirring; the average particle size of Al3Ti particles in the obtained Al-Al3Ti intermediate alloy is smaller than 5 microns; then, the K2TiF6 powder and KBF4 powder are mixed according to a mole ratio of 1: 2, and are fed in the pure aluminum melt to prepare an uniform-structured Al-TiB2 intermediate alloy through assistance by ultrasonic stirring; the average particle size of TiB2 particles in the obtained Al-TiB2 intermediate alloy is smaller than 100 microns; finally, Al, the Al-Al3Ti intermediate alloy and the Al-TiB2 intermediate alloy are used as raw materials, or Al, alloy elements, the Al-Al3Ti intermediate alloy and the Al-TiB2 intermediate alloy are used as the raw materials; the raw materials are molten; reinforced particles are dispersed through assistance by ultrasonic stirring; and a transgranular grain boundary double-reinforcement aluminum base composite material is obtained after casting.

Description

technical field [0001] The invention belongs to the field of preparation of advanced metal-matrix composite materials, and in particular relates to an ultrasonic-assisted liquid-phase composite method for preparing an aluminum-matrix composite material reinforced with small particle size multi-phase particles distributed in grain boundaries within a grain and a preparation method thereof. Background technique [0002] Particle-reinforced aluminum matrix composites have high specific strength, specific modulus and good wear resistance, and have very broad application prospects in aerospace, automobile manufacturing, electronic devices and other fields. The preparation of particle-reinforced aluminum matrix composites by casting method can significantly reduce the production cost, and can directly obtain castings with complex shapes, so this method has attracted much attention in the field of particle-reinforced aluminum matrix composites preparation. Generally, the smaller th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/10
CPCC22C21/00C22C1/1005C22C1/1036C22C1/1047
Inventor 刘志伟董志武郑巧玲皇志富高义民邢建东
Owner 咸阳瞪羚谷新材料科技有限公司
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