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Preparing and molding devices and preparing and molding methods of nano SiC particle enhanced 7075 aluminum matrix composite material semi-solid slurry

A technology of aluminum-based composite material and semi-solid slurry, which is applied in the field of preparation and molding equipment and preparation and molding of nano-SiC particle-reinforced 7075 aluminum-based composite material semi-solid slurry, which can solve the problems of poor interface wettability, high cost, Poor shape control and other problems, to achieve the effect of uniform spheroidization and fine grains

Active Publication Date: 2015-03-04
HARBIN INST OF TECH
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  • 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 semi-solid slurry of particle-reinforced aluminum-based composite materials. Poor problem, but to provide nano-SiC particle reinforced 7075 aluminum matrix composite material semi-solid slurry preparation and molding device and preparation and molding method

Method used

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  • Preparing and molding devices and preparing and molding methods of nano SiC particle enhanced 7075 aluminum matrix composite material semi-solid slurry
  • Preparing and molding devices and preparing and molding methods of nano SiC particle enhanced 7075 aluminum matrix composite material semi-solid slurry
  • Preparing and molding devices and preparing and molding methods of nano SiC particle enhanced 7075 aluminum matrix composite material semi-solid slurry

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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 discloses preparing and molding devices and preparing and molding methods of nano SiC particle enhanced 7075 aluminum matrix composite material semi-solid slurry, relates to preparing and molding devices and preparing and molding methods of semi-solid slurry, and aims at solving the problems in the currently prepared particle enhanced aluminum matrix composite material semi-solid slurry that the interfacial wettability of nano particles and aluminum matrix is poor, nano particles are easy to flocculate, and the molding method is high in cost, long in technological process and poor in shape control. The preparation device comprises an oscillating device, a thermocouple, a resistance furnace, a cover board, a stirrer, a motor, a frame and a crucible. The preparation method comprises the following steps: preparing liquid 7075 aluminum alloy; carrying out ultrasonic cleaning; mixing and carrying out ultrasonic treatment; stirring and cooling; and preparing the semi-solid slurry. The molding device comprises a template, bolts, a heater, a pressure plate, a convex die, a fixing plate, a concave die sleeve, a concave die, a mold cavity and a top rod. The molding method comprises the following steps: preheating; heating; charging; pressurizing; taking out; and cooling. The preparing and molding devices and the preparing and molding methods are suitable for preparing and molding the semi-solid slurry.

Description

technical field [0001] The invention relates to a preparation and molding device and a preparation and molding method of semi-solid slurry. 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 achieve sustainable and rapid economic development, structural parts are developing rapidly towards lightweight and high reliability. Particle-reinforced aluminum matrix composites are widely used in Complex load-bearing structural parts in the equipmen...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/02B22D27/11
CPCC22C1/1036C22C21/00C22C1/1073
Inventor 姜巨福王迎
Owner HARBIN INST OF TECH
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