Dec 13 2012
Topics Covered
Introduction
Chemical Composition
Applications
Introduction
Master alloys are base metals which can be mixed with one of two elements of higher percentage. They are suitable for structure control and composition adjustment, and can be formed in a variety of shapes. Based on their applications, they are also referred to as modifiers, hardeners, or grain refiners. They are very economical and save production time and energy. They are semi-finished products that are used as raw materials in metal industries.
Chemical Composition
The chemical composition of copper-zirconium master alloy is given in the following table.
|
Element |
Content (%) |
|
Copper, Cu |
89-91 |
|
Zirconium, Zr |
9-11 |
|
Tin, Sn |
0.1 |
|
Iron, Fe |
0.05 |
|
Lead, Pb |
0.05 |
|
Manganese, Mn |
0.03 |
|
Silicon, Si |
0.02 |
|
Aluminium, Al |
0.02 |
|
Antimony, Sb |
0.01 |
|
Arsenic, As |
0.01 |
|
Bismuth, Bi |
0.005 |
|
Tellurium, Te |
0.005 |
|
Selenium, Se |
0.005 |
|
Others |
0.25 |
Applications
Copper-zirconium master alloy is used as a grain refiner for brass. It is suitable for precipitation hardening of alloyed copper.