High-performance 7075 aluminum alloy die forging method

An aluminum alloy, high-performance technology, applied in the field of material preparation, can solve the problems of lack of carboxylated graphene reinforced aluminum-based composite material preparation and forming technology, high powder waste, and large human injury, so as to reduce the probability of agglomeration and reduce Internal stress, the effect of good interface

Active Publication Date: 2019-01-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, due to the limitations of electroless plating, this method is more harmful to the human body, and it also needs to carboxylate graphene separately, the production cycle is long, and the waste of this type of powder is high, which has certain limitations.
[0008] Therefore, there is still a lack of a cost-effective preparation and forming technology for carboxylated graphene-reinforced aluminum matrix composites.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The carboxylated graphene was ultrasonically pre-dispersed in analytical pure ethanol for 1 hour, the temperature was at room temperature, and no water vapor was controlled throughout the process. The volume ratio was strictly controlled at 0.2:50, and then the resulting dispersion was poured into a precursor solution consisting of glycerol and tetraisopropyl titanate, sealed and sonicated for 1 hour. Among them, the volume ratio of glycerol to tetraisopropyl titanate is 10:0.9. Afterwards, hydrothermal treatment is carried out, wherein the volume of the suspension accounts for 60% of the volume of the reactor. Then put it into the reaction furnace to heat, raise the temperature to 100°C at 5°C / min, keep it for 2h, then raise the temperature to 180°C at 3°C / min, and keep it for 10h. Take out the reactor and cool it in air. The resulting solution was taken out, centrifuged, and centrifuged several times by pouring analytical pure ethanol until the solution was colorles...

Embodiment 2

[0035] The carboxylated graphene was ultrasonically pre-dispersed in analytical pure ethanol for 1 hour, the temperature was at room temperature, and no water vapor was controlled throughout the process. The volume ratio was strictly controlled at 0.2:50, and then the resulting dispersion was poured into a precursor solution consisting of glycerol and tetraisopropyl titanate, sealed and sonicated for 1 hour. Among them, the volume ratio of glycerol to tetraisopropyl titanate is 10:0.4. Afterwards, hydrothermal treatment is carried out, wherein the volume of the suspension accounts for 50% of the volume of the reactor. Then put it into the reaction furnace to heat, raise the temperature to 90°C at 5°C / min, keep it for 2h, then raise the temperature to 180°C at 2°C / min, and keep it for 10h. Take out the reactor and cool it in air. The resulting solution was taken out, centrifuged, and centrifuged several times by pouring analytical pure ethanol until the solution was colorless...

Embodiment 3

[0039] The carboxylated graphene was ultrasonically pre-dispersed in analytical pure ethanol for 1 hour, the temperature was at room temperature, and no water vapor was controlled throughout the process. The volume ratio was strictly controlled at 0.2:50, and then the resulting dispersion was poured into a precursor solution consisting of glycerol and tetraisopropyl titanate, sealed and sonicated for 1 hour. Among them, the volume ratio of glycerol to tetraisopropyl titanate is 10:0.4. Afterwards, hydrothermal treatment is carried out, wherein the volume of the suspension accounts for 50% of the volume of the reactor. Then put it into the reaction furnace to heat, raise the temperature to 90°C at 5°C / min, keep it for 2h, then raise the temperature to 180°C at 2°C / min, and keep it for 10h. Take out the reactor and cool it in air. The resulting solution was taken out, centrifuged, and centrifuged several times by pouring analytical pure ethanol until the solution was colorless...

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Abstract

The invention provides a high-performance 7075 aluminum alloy die forging method. In a water-free environment, Ti ions are adsorbed under the action of functional groups of carbonylated graphene through alcohol thermal high pressure, and TiO2 (anatase type) clad carbonylated graphene is obtained during after-baking; the obtained powder and pure aluminum powder are mixed and cold-pressed accordingto a certain ratio to obtain an intermediate alloy; the intermediate alloy is added into aluminum alloy melt as required, and TiO2 clad carbonylated graphene particles are dispersed under the action of a high-energy ultrasonic instrument; an obtained composite is poured to the center position of a lower die cavity to conduct thixotropic forging to obtain a die forged blank, then the blank is subjected to T6 heat treatment, and finally, a high-performance product is obtained. The product produced through the method has the good comprehensive mechanical performance. Meanwhile, the technology hasthe advantages of being simple, safe, easy to operate, controllable and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation. Background technique [0002] Graphene nanosheets are one-atom-layer-thick two-dimensional materials composed of sp2 hybridized carbon atoms, which exhibit a series of unusual physical properties. Because of its special two-dimensional structure, graphene nanosheets have attracted great interest from researchers in physics, chemistry and materials science. Basic research and engineering application research on graphene have become a research hotspot in recent years. Due to the high strength of graphene, its tensile strength can reach 130GPa, implying that graphene has a huge application space in material application research. [0003] In fact, the research on using carbon materials such as carbon nanotubes or graphene to enhance the strength and other mechanical properties of aluminum has been going on and has made some progress. However, due to its extremely outstanding physical p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10B22D18/02C22F1/053C22C21/10C22C32/00
CPCC22C1/101C22C1/1036C22C21/10C22C32/00C22F1/053B22D18/02C22C1/1073C22C1/12
Inventor 闫洪魏志帆
Owner NANCHANG UNIV
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