Application and technical progress of cast magnesium alloys for cast magnesium alloys

Magnesium alloy. The material production process is mainly divided into three parts:

1. Bump casting, through the smelting alloy ratio, the production of qualified plate and rod blanks;

2. Forming, through extrusion, rolling and forging to change the internal grain structure of magnesium alloy and improve its mechanical properties.

3. Heat treatment, through temperature control, the production of magnesium alloy bridge that meets the requirements of the round and noisy material.

The core is just a few words, in actual work, simplifying the process, improving the output and pass rate, is what needs to be improved in our production work!

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Magnesium alloy pressed.

Characteristics of casting: It can be die-cast according to the design of different shapes, sizes and requirements. dao

Advantages of magnesium alloy die-casting: the inner capacity is lower than that of aluminum alloy, light weight and strong rigidity; Compared with plastics, it is an environmentally friendly material, with high hardness and anti-magnetic wave interference; Compared with titanium alloy, the cost is cheaper.

ps。At present, magnesium alloy ingots per ton: about 19000+-500 yuan.

The specific gravity of magnesium alloy DU is lighter, lighter than aluminum alloy zhi1 3, aluminum alloy DAO is now 17,000 tons of material price, and magnesium alloy 23,000 tons of material price, such as die-casting accessories on the number of pieces sold, has exceeded the production cost of aluminum alloy.

Magnesium alloy also has good shielding properties (anti-magnetic interference) and a high anti-damping coefficient. There was a time when magnesium alloy was strongly recommended for Apple's panels, but the surface treatment requirements of magnesium alloys were relatively complex, resulting in high manufacturing costs. Therefore, the application of magnesium alloy in 3C shows that it cannot reflect the competitive advantage.

Magnesium alloy die castings are moving towards the era of automotive parts.

Advantages: Compared with other metals, magnesium composite gold has a low melting point, less heat than bai, and DU during regeneration and melting

The energy consumed is 4% of the energy consumed by the manufacture of new materials. It can be used to achieve the quality of the original alloy, but other materials cannot. In addition, magnesium alloy die casting can be made of products, other materials can not reach.

Easy to cut processing, high work efficiency, small loss to the tool, low cost. Disadvantages: The gating and riser materials and corner scraps produced by magnesium alloy die-casting cannot be directly returned to the alloy night furnace of die-casting, and need to be re-smelted.

Die casting is required to be effectively protected by gas and is easy to oxidize and burn. Strong professionalism and high requirements for personnel in the die-casting industry.

a. Due to magnesium complex.

Gold has excellent liquidity properties.

can produce more complex and thin-walled parts than aluminum alloy die casting.

b. Magnesium alloy has good thermal conductivity and metal electromagnetic protection performance, which is more suitable for electronic industry products than other alloys.

c. Magnesium resources are inexhaustible.

d. The additional materials can be recycled.

e. Good sound insulation and vibration damping.

f. The specific gravity is about two-thirds of that of aluminum alloy.

Magnesium alloy casting refers to a production process of magnesium alloy, and the magnesium alloy produced by casting is cast magnesium alloy or magnesium alloy casting.

Cast magnesium alloy is a magnesium alloy formed by adding alloying elements based on magnesium, which is suitable for the production of parts by casting method. According to the molding process, magnesium alloy can be divided into cast magnesium alloy and deformed magnesium alloy, which are very different in composition and microstructure. Cast magnesium alloy is mainly used for automobile parts, machine shells and electrical components; Deformed magnesium alloys are mainly used in thin plates, extrusions and forgings, etc.

Cast magnesium alloy has the following characteristics: large crystallization temperature interval, large volume shrinkage and linear shrinkage, small eutectic weight, specific heat capacity, latent heat of solidification, density and liquid indenter in the microstructure, low fluidity, and the tendency of cracking and shrinkage is generally much larger than that of cast aluminum alloy.

What are the advantages of deformed magnesium alloy compared to cast magnesium alloy?

Zinc alloy is an alloy composed of zinc-based and other elements. Commonly added alloying elements include aluminum, copper, magnesium, cadmium, lead, titanium and other low-temperature zinc alloys. Magnesium is a young metal, developed only in the 20th century.

It is silvery-white, with a melting point of 649, light weight, and a density of gram cm3, which is about 1 4 of copper and 2 3 of aluminumIt has strong chemical activity and large affinity with oxygen, and is often used as a reducing agent to replace metals such as titanium and beryllium. Magnesium in powder or thin strips is flammable in the air and emits a dazzling white light when burned. Magnesium does not interact with fluoride, hydrofluoric acid and chromic acid, nor is it attacked by caustic alkali, but it is highly soluble in organic and inorganic acids.

Magnesium is one of the most abundant and widely distributed elements in the earth's crust. Minerals of industrial value are; Magnesite, dolomite, carnallite. In addition, seawater will also become a source of magnesium resources.

Therefore, MG has two functions, eliminating the influence of S on ductile iron and promoting the precipitation of graphite according to the spherical form. Magnesia-rich olivine, used as a refractory material: a. Make olivine bricks, used in ladles, glass melting furnaces.

It is used as the main raw material for electric furnace taphole filler. c. Ramming materials on the soaking furnace hearth. Used as a casting sand material:

Forsterite and sand are excellent modeling materials used in the production of steel castings in advanced countries in the world today, especially manganese steel parts, which have the advantages of high temperature resistance, corrosion resistance and good chemical stability. The sand has high refractory resistance (1710) and metal oxidation erosion resistance, which can effectively prevent the casting from producing chemical sticking sand, and ensure a smooth casting surface and clear casting contour. The sand expands slowly at all temperatures, and is less than deformation, without the characteristics of sudden expansion, and the casting is not easy to produce main sand inclusion defects.