Most metals rust, e.g., Silver (Ag) turns black, aluminum (To the) changes to white, copper (With) changes to green and, ordinarily, steel changes to red. In the case of steel, iron (Faith) presente se combina con el oxígeno del aire para formar óxidos de hierro o “herrumbre”.
In the early twentieth century some metallurgists discovered that by adding just over 10% chromic (Cr) Steel, éste no presentaba “herrumbre” under normal conditions; The reason is that chromium tends to unite with the first oxygen to form a thin transparent film of chromium oxide on the steel surface and precludes further oxidation of stainless steel. If that occurs the chemical mechanical damage, this film is self-healing in the presence of oxygen.
Stainless steel is essentially a low carbon steel, which contains at least about 10% weight chromium.
There are several groups of Aceros the families stainless, and each contains a specific number of types with different characteristics. In order to understand the nomenclature, is necessary to establish that the internal structure of metals consists of an arrangement between the atoms that form a spatial network and to study crystal structure called.
Stainless steel can be classified into five different families; cuatro de éstas corresponden a las particulares estructuras cristalinas formadas en la Alloy: Austen, Ferrite, martensita, and duplex (Austen más ferrita); while the fifth family are precipitation hardened alloys, que están basadas más en el tipo de tratamiento térmico usado que en la estructura cristalina.
stainless steel
Posted in
