Method and apparatus for preparing composite solder for welding particle enhanced aluminium-based composite material

Abstract

The invention provides the preparing method and device for combined welding rod used for particle enhancement composite material aluminium. The method comprises the following steps: putting the clean alloy into crucible, starting vacuum pump to 5 X10-5, then charging protective gas into vacuum system, heating the alloy, controlling the temperature, the lowest which is higher than liquid line of alloy, and the highest of which is lower than liquid line plus 100-125Deg.C, melting alloy, canceling vacuum, carrying out slag-out treatment, adding clean reinforcement particle according to volume fraction, charging protective gas, starting agitating device and ultrasonic vibrator, after stirring and ultrasonic vibration, carrying out slag-out treatment, cooling, and getting casting ingot. The invention improves the preparing efficiency, overcomes the defect that it is not sufficient to wet the enhancement phase / base, and optimizes the alloy solidification structure.

Description

(1) Technical field [0001] The invention relates to a method for preparing materials, in particular to a method for preparing welding materials. The invention also relates to special equipment for this preparation method. (2) Background technology [0002] Particle reinforced aluminum matrix composites have excellent characteristics such as specific strength, high specific stiffness, creep resistance, small thermal expansion coefficient, and good high temperature performance. With the continuous improvement of the preparation process, the cost of this material is greatly reduced, and it has a wide range of application prospects in the fields of aerospace and national defense, such as missiles, tanks, armored vehicles, etc., as well as in civilian industries, such as automobile engine pistons, connecting rod brakes Machines and bicycle parts, etc. However, because the composition, structure and performance of the reinforcement phase particles in this kind of composite mater...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method that can improve the preparation efficiency of the composite solder, overcome the problems of incomplete wetting of the reinforcement phase / matrix and the microscopic segregation of the reinforcement phase, optimize the solidification structure of the matrix alloy, and avoid the introduction of interface defects in the composite solder Preparation method of composite solder for particle reinforced aluminum matrix composite welding which seriously affects the performance of joints in aluminum matrix composite welds

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