A general term for alloys based on aluminum. The main alloying elements include copper, silicon, magnesium, zinc and manganese, while the secondary alloying elements include nickel, iron, titanium, chromium and lithium.
Aluminium alloy density is low, but intensity is higher, be close to or exceed high grade steel, plasticity is good, can be machined all sorts of profile, have excellent conductance, conductance is hot sex and fight corrode sex, the industry is used extensively, usage amount is next to steel.
Aluminum alloy is divided into two categories: casting aluminum alloy, used in the casting state; Deformation of aluminum alloy, can withstand pressure processing, mechanical properties higher than the cast state. Can be processed into a variety of shapes, specifications of aluminum alloy. Mainly used for manufacturing aviation equipment, daily necessities, building doors and Windows, etc.
An alloy based on zinc in which other elements are added. Alloying elements commonly added include aluminum, copper, magnesium, cadmium, lead, titanium, etc. Zinc alloy low melting point, good fluidity, easy fusion welding, brazing and plastic processing, corrosion resistance in the atmosphere, residual material easy recovery and remelting; However, the creep strength is low and natural aging is easy to cause size change. Melting method, die casting or pressure processing into wood. According to the manufacturing process can be divided into casting zinc alloy and deformation zinc alloy.
The main added elements of zinc alloy are aluminum, copper and magnesium, etc. The zinc alloy can be divided into two types according to the processing technology: deformation and casting zinc alloy.
Zinc alloy composition and casting quality
I. features of zinc alloy
1. Bigger than life.
2. Good casting performance, can be die-cast complex shape, thin wall precision pieces, casting surface smooth.
3. Surface treatment: electroplating, spraying and painting.
4. No iron absorption, no corrosion and no mold sticking during melting and die casting.
5. Good mechanical properties and abrasion resistance at room temperature.
6. Low melting point, melts at 385 ℃, die-casting molding easily.