Forming device and method for semi-solid slurry of nanometer SiC-particle-reinforced 7075-aluminum-based composite material

A technology of aluminum-based composite materials and semi-solid slurry, which is applied in the forming device and field of forming semi-solid slurry of nano-SiC particles reinforced 7075 aluminum-based composite materials, which can solve poor interface wettability, high cost, and long process flow, etc. problem, to achieve the effect of uniform spheroidization and fine grain

Active Publication Date: 2016-03-09
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of poor interface wettability between nanoparticles and aluminum matrix, easy flocculation of nanoparticles, high cost of forming method, long process flow and shape control in the existing semi-solid slurry of particle reinforced aluminum matrix composite materials. Poor problem, and provide a molding device and molding method for nano-SiC particle reinforced 7075 aluminum matrix composite semi-solid slurry

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  • Forming device and method for semi-solid slurry of nanometer SiC-particle-reinforced 7075-aluminum-based composite material
  • Forming device and method for semi-solid slurry of nanometer SiC-particle-reinforced 7075-aluminum-based composite material
  • Forming device and method for semi-solid slurry of nanometer SiC-particle-reinforced 7075-aluminum-based composite material

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specific Embodiment approach 1

[0043] Specific embodiment 1: This embodiment is a preparation device for semi-solid slurry of nano-SiC particles reinforced 7075 aluminum-based composite materials, including an ultrasonic vibration device 1, a thermocouple 2, a resistance furnace 5, a cover plate 6, a stirrer 7, a motor 8, frame 9 and crucible 10;

[0044] The crucible 10 is placed in the resistance furnace 5; the cover plate 6 is covered on the upper end surface of the resistance furnace 5, and the middle position of the cover plate 6 is provided with a punching hole, and the ultrasonic vibration device 1 or the stirrer 7 passes through the cover plate 6 The punching hole extends into the inside of the crucible 10; the upper end of the agitator 7 is connected with the motor 8, and the motor 8 and the frame 9 are fixedly connected by bolts.

specific Embodiment approach 2

[0045] Specific embodiment two: the difference between this embodiment and specific embodiment one is: described crucible 10 is made by molybdenum alloy material, and the method for making is to adopt powder metallurgy method; The external diameter of crucible 10 is 160mm, and internal diameter is 140mm, a height of 360mm, and a bottom wall thickness of 20mm; the inner tank material of the resistance furnace 5 is SiC ceramic material. Others are the same as the first embodiment.

specific Embodiment approach 3

[0046] Specific implementation mode three: This implementation mode is a method for preparing semi-solid slurry of nano-SiC particle reinforced 7075 aluminum-based composite material, which is specifically prepared according to the following method:

[0047] 1. Preparation of liquid 7075 aluminum alloy: heating the resistance furnace 5 to 650°C, then putting the extruded 7075 aluminum alloy billet into the crucible 10, and then keeping it at 650°C for 10-16 minutes to obtain liquid 7075 aluminum alloy;

[0048] 2. Ultrasonic cleaning: using ethanol as a cleaning agent, ultrasonically clean the nano-SiC particles at a power of 100W for 2 minutes to 3 minutes, and then dry them to obtain nano-SiC particles after ultrasonic cleaning;

[0049] 3. Mixing and ultrasonication: Add the nano-SiC particles after ultrasonic cleaning to the liquid 7075 aluminum alloy at a temperature of 650°C to obtain a mixed melt of nano-SiC particles and 7075 aluminum alloy; then place the ultrasonic vi...

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Abstract

The invention relates to a forming device and method for semi-solid slurry, in particular to a forming device and method for semi-solid slurry of a nanometer SiC-particle-reinforced 7075-aluminum-based composite material. The forming device and method aim at solving the problems that as for existing prepared semi-solid slurry of the particle-reinforced aluminum-based composite material, the interface wettability of nano-particles and an aluminum base body is poor, the nano-particles are prone to flocculation, a forming method is high in cost, a technological process is long, and shape control is poor. A preparing device comprises a vibration device, a thermocouple, a resistance furnace, a cover plate, a stirrer, a motor, a frame and a crucible. A preparing method includes the steps of preparing of 7075 aluminum alloy; ultrasonic cleaning; mixing and ultrasonic treatment; stirring and cooling; preparing of the semi-solid slurry. The forming device comprises templates, bolts, a heater, a pressing plate, a male mold, a fixing plate, a female mold sleeve, a female mold, a cavity and an ejector rod. The forming method includes the steps of preheating; heating; material feeding; pressurizing; taking and cooling. The forming device and method are suitable for preparing and forming the semi-solid slurry.

Description

technical field [0001] The present invention relates to a forming device and a forming method of semi-solid slurry, which is the preparation and forming device of nano-SiC particle reinforced 7075 aluminum-based composite material semi-solid slurry with application date of November 27, 2014 and application number of 201410705946.8. Preparation and Forming Method" divisional application. Background technique [0002] Due to a series of excellent properties such as low density, high specific strength and specific stiffness, high elastic modulus, high wear resistance, high thermal conductivity and low thermal expansion coefficient of nano-ceramic particle aluminum matrix composites, it is widely used in aviation, aerospace, transportation, etc. The fields of transportation, nuclear industry and ordnance industry have received extensive attention. At the same time, in order to adapt to the national policy of "energy saving, emission reduction, and consumption reduction" and ach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C21/00
CPCC22C1/1036C22C21/00C22C1/1073
Inventor 姜巨福王迎
Owner HARBIN INST OF TECH
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