Magnesium alloy for performing semi-solid extrusion casting on forming piece under atmospheric environment as well as process

Abstract

The invention discloses magnesium alloy for performing semi-solid extrusion casting on a forming piece under an atmospheric environment as well as a process. The magnesium alloy comprises the following components in percentage by weight: 5.0 to 8.0 percent of Sn, 0.2 to 0.4 percent of Sc, 1.5 to 1.8 percent of Bi, 0.4 to 0.6 percent of Ti, 0.1 to 0.2 percent of Te, 2.0 to 2.5 percent of In, 0.2 to0.5 percent of Ru, 1.5 to 2.0 percent of Cd and the balance of magnesium. The material provides a material science solution which is different from the traditional solution of adding Ca, Be, Zn and rare earth elements for flame resistance; furthermore, the alloy has excellent casting property and can reach to the mechanical level of the conventional magnesium alloy. The current situation that themechanical property of the existing flame-resistant magnesium alloy is not ideal is completely overcome.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a magnesium alloy. Background technique [0002] Magnesium is a very light metal with a specific gravity about 2 / 3 of that of aluminum and 1 / 4 of that of iron. Magnesium alloys based on magnesium and added with other elements have a series of excellent mechanical properties, physical properties and chemical properties, such as: low density, high specific strength, large elastic modulus, good shock absorption, and shock load capacity ratio The aluminum alloy is large and has good corrosion resistance to organic substances and alkalis. In addition, magnesium alloy also has the advantages of good electromagnetic shielding, machinability, low processing cost, processing energy is only 70% of aluminum alloy, and easy recycling. Therefore, as the lightest engineering metal material, magnesium alloy is known as the green engineering material in the 21st century. Not only has a wide ra...

AI Technical Summary

Problems solved by technology

Although this method is simple and easy, it will produce a lot of irritating gases (such as Cl 2 , HCl, HF, etc.) and pollute the environment

In addition, the addition of flux during casting will cause inclusions in the magnesium alloy, reducing the mechanical properties and corrosion resistance of the alloy.

Moreover, when rare earth elements or other active elements are added to the alloy, the flux is easy to react with these elements, resulting in the loss of these added elements

(2) The gas protection method uses SF 6 , SO 2 and CO 2 , but their disadvantages are very obvious

However, although these flame-retardant magnesium alloys have excellent flame-retardant properties, so far this type of material still has many shortcomings in mechanical and physical properties, which has seriously hindered the industrialization process and market share of this type of material.