01
Pure copper
Pure copper is purplish red, so it is also called copper, with a face-centered cubic lattice, no isomeric transformation, non-magnetic.
Pure copper has excellent electrical and thermal conductivity, good corrosion resistance and good plasticity in the atmosphere, fresh water and condensate.
Impurity elements:
Bismuth or lead: easy to form low melting point eutectic with copper, resulting in hot brittleness of copper;
Bismuth or antimony, etc. : The atomic size of copper is very different, and it is easy to cause bismuth or antimony in copper
The segregation at grain boundaries results in a strong tendency of grain boundary embrittlement.
Oxygen element: Copper containing oxygen is easy to crack during hydrogen reduction.
Grade and application of industrial pure copper
According to different O% and production methods, it can be divided into three categories:
Tough Copper:
0.02%-0.10%O; T1, T2, T3, T4;
T1, T2: conductive and high purity copper alloy;
T3, T4: generally used copper and copper alloy.
Oxygen-free copper:
<0.003%;
TU1, TU2: mainly used for conductors in electronic vacuum instruments
Deoxidized copper:
<0.01%; TUP, TUMn;
TUP: mainly used for welding copper, making heat exchangers, drainage pipes, condensing pipes, etc.
TUMn: Copper for electronic pipes.
02
Copper alloy
The elements commonly added to copper alloys are Zn, Sn, Al, Mn, Ni, Fe, Be, Ti, Zr, Cr, etc., which not only improves the strength, but also maintains the characteristics of pure copper.
Copper alloys are divided into three categories: brass, bronze and white copper.
1: Brass
Copper alloys with zinc as the main alloying element are called brass.
Brass is divided into ordinary brass and special brass according to composition; According to the process can be divided into processing brass and casting brass.
Several special brasses
1) Tin brass HSn70-1
2) Aluminum brass HAl85-0.5
3) Silicon brass HSi65-1.5-3
4) Lead brass
2.bronze
Bronze is a general term for alloys composed of Cu, Sn, Al, Be, Si, Mn, Cr, Cd, Zr and Co.
Bronze can be divided into tin bronze (Cu-Sn) and special bronze according to its composition. In the special bronze, according to the main additive element, they are respectively named aluminum bronze (Cu-Al), beryllium bronze (Cu-Be) and so on.
1) Tin bronze
2) multicomponent tin bronze
3) Aluminum bronze
4) multicomponent aluminum bronze
5) Beryllium bronze
6) multicomponent beryllium bronze
7) Other bronz
3.cupric
White copper is divided into binary white copper (Cu-Ni) and multicomponent white copper (Cu-Ni-(M)).
According to the use is divided into structural white copper and electrical white copper.
Copper and nickel can form infinite solid solutions because of their electronegativity, size factor and lattice type.
Its hardness, strength and resistivity increase with the increase of solute concentration, and its plasticity and resistance temperature coefficient decrease with it.
Sichuan Liaofu Special Steel Economic and Trade Co., Ltd. is a main metal material export company, can provide you with high-quality steel, copper and copper alloy, welcome your consultation.