Magnesium lithium alloy can be cast in many ways, including casting, die casting and semi-solid casting. It has excellent filling capacity and feeding capacity.

The plastic deformation ability of magnesium lithium alloy is better than that of aluminum alloy and other metal materials. It can forge complex structural parts with small machining allowance and high product forming rate.

Stamping

The elongation of magnesium lithium alloy can be greater than 36, and the material utilization rate is high in silver and gold products.

Spinning

For rotary parts, the spinning process can be used for production. The minimum wall thickness is less than 1mm, and the rebound amount is small in the process of product processing, which can produce products with gradual thickness.

Extrusion

Magnesium lithium alloy has good fluidity at high temperature, and can extrude non symmetrical shaped materials. Compared with other alloy products, the extruded heat sink has complex structure and high dimensional accuracy.

The welding process of Mg Li alloy is simple, the weld strength can be more than 90% higher than the base material, and the heat affected zone is small. Especially for thin-walled products, the welding deformation is small.

Conductive oxidation

Conductive oxidation refers to the process of immersing alloy products in oxidation solution and generating a thin layer of compound layer on the surface through redox reaction.The thickness is 0.1 to 2.0 microns,which can prevent the oxidation of magnesium lithium alloy in air.It can be used together with micro arc oxidation treatment and paint spraying treatment to achieve the conductive function and environmental adaptability of internal conductivity and external anti-corrosion of the chamber.

The conductive oxidation process is only suitable for the mildest service environment.Aerospace products mainly use conductive oxidation+painting process to form internal conductivity of components and external absorption.

Electroplate

Electroplating refers to the electrochemical process in which the product is hung on the cathode connected by the copper rod in the electroplating solution,and the anode is dissolved after being electrified,and the coating is formed on the product hung by the cathode.The main plating types of electroplating are:gold plating,silver plating,iron plating,copper plating,etc.Generally,the alloy adopts multi-layer coating with a total thickness of 20-40 microns,which has strong corrosion resistance,conductivity,weldability and other functions.It can be used together with conductive oxidation and painting.

The process is mainly applied to cavity parts requiring strong conductivity and welding in aerospace,aviation and military electronics fields.

Electroless plating

Electroless plating refers to the process of placing magnesium lithium alloy products that have been pretreated to form autocatalytic centers in the electroless plating solution and forming coatings on the products through redox reaction.The commonly used chemical plating processes are:chemical plating process and chemical copper plating process.The thickness of the chemical plating layer is about 25~40 microns,which can achieve 96 hours of neutral salt spray test,and can achieve high-quality conductivity,weldability,high corrosion resistance and other properties.

The process is mainly applied to cavity parts requiring strong conductivity and welding in aerospace,aviation and military electronics fields.

Micro-arc oxidation

Micro arc oxidation is an electrochemical process.When the alloy is placed in the oxidation solution,under the action of high voltage and high current,the part surface appears arc effect,which generates instantaneous high temperature to form a layer of dense complex compound on the part surface.The complex compound layer can grow to a thickness of 70 microns,with a surface hardness of more than 1000 HV,good wear resistance,excellent corrosion resistance,and 400 h neutral salt spray test after sealing treatment,The surface does not conduct electricity.

This process is mainly used for the parts with strong corrosion resistance and wear resistance,such as:the outside of the case shell,the surface,the friction position of the guide rail parts,etc.Strong corrosion resistance process usually adopts:conductive.

Electrophoretic coating

Electrophoretic coating is a coating method that makes use of the electrophoretic movement and segregation of polymer electrolyte,that is,under the action of an external DC power supply,colloidal particles(small paint particles)move directionally to the cathode or anode in the dispersion medium.On magnesium lithium alloy materials,electrophoretic coating is generally used in combination with conductive oxidation and micro arc oxidation to obtain coatings of various colors.The surface is non-conductive and has excellent salt spray resistance test performance.

It is mainly aimed at the batch products of military equipment,which can meet the requirements of military green,black,ice gray and other colors and strong corrosion resistance.

Painting

The painting process is to apply the paint on the surface of the alloy workpiece and form the final paint coating after heat curing or ultraviolet curing.Generally speaking,conductive oxidation or micro arc oxidation treatment shall be carried out on the part surface before painting.The paint film is non-conductive and has excellent salt spray resistance test performance.

The main function of spray painting is the"three prevention"of moisture,salt fog and mold prevention,and the"thermal control"requirements of solar absorption rate and hemispherical emissivity.