Rotary pouring manufacture method of AZ91D magnesium alloy semisolid slurry

Abstract

The invention relates to a method for preparing AZ91D magnesium alloy semi-solid sizing agent by rotating pouring, which is characterized in that AZ91D magnesium alloy is melted and refined in a smelting maintaining furnace, then cooled to 630-650 DEG C, and insulated for 10-30 minutes; a stainless steel rotating pouring tube is preheated to 60-80 DEG C, with the rotating speed of the pouring tube controlled at 0-105r / min, and the inclination of the rotating pouring tube being 20-30 degrees; then the AZ91D magnesium alloy melt is poured into the rotating tube through a deflection tube; a crystallizer is preheated to 470-500 DEG C; the AZ91D magnesium alloy melt enters the crystallizer through the rotating pouring tube, and insulated for 5-15 minutes. The method for preparing the AZ91D magnesium alloy semi-solid sizing agent by rotating pouring has a simple device, low cost, convenient operation, high practicality; the prepared AZ91D magnesium alloy semi-solid sizing agent has fine grain organization and even distribution; in addition, the process flow is short, the energy consumption is low, the efficiency is high, the equipment is simple, the structure is compact, the applicability is high, and the method is especially applicable to small and medium-sized enterprises of China.

Description

technical field [0001] The invention belongs to the technical field of metal material forming, and relates to a preparation method of magnesium alloy semi-solid slurry. Background technique [0002] As a light metal, magnesium alloy is second only to titanium alloy and alloy structural steel in terms of specific strength and specific stiffness. It is not only much higher than engineering materials, but also significantly higher than aluminum alloy. Its impact resistance, processing performance and recyclability are all better than aluminum alloy. alloy. Because of these excellent properties of magnesium, magnesium and its alloys have been widely used in aviation, aerospace, navigation, communication, transportation, audio and video equipment, microelectronics technology and other fields in recent years. Magnesium alloys have excellent thin-wall casting performance, good specific strength, specific stiffness and anti-collision ability, which can fully meet the requirements o...

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Problems solved by technology

Each method has its own disadvantages. The traditional mechanical stirring method has low production efficiency, short service life of the stirring chamber and stirring rod, and the stirring rod and stirring chamber are easy to pollute the semi-solid alloy slurry, which is only suitable for laboratory research work. , cannot meet the needs of commercial production; due to the existence of "skin effect", the electromagnetic stirring method is generally considered to be only able to prepare semi-solid slurry with a diameter of less than 150mm, and the energy consumption is large; the attenuation of ultrasonic vibration waves in the ultrasonic vibration method is severe, Ultrasonic waves cannot reach deeper or farther areas; the deformation mutagenesis activation method requires a large amount of extrusion deformation, so only small-diameter alloy semi-solid billets can be prepared; semi-solid billets prepared by spray deposition are expensive and only suitable for It is suitable for preparing advanced or refractory alloy blanks and forming advanced part blanks, and it cannot be applied on a large scale

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