The brief introduction of ferrite, austenite and martensite

As we all know, solid metals and alloys are all crystals, that is, their atoms are arranged according to certain rules. There are three ways of arrangement: body centered cubic lattice structure, face centered cubic lattice structure and closely spaced six party lattice structure. E-BON the most excellent stainless steel company, which provide you with OEM Stainless Steel Garlic Press.

Metal is made up of polycrystalline, and its polycrystalline structure is formed during the crystallization of metal. Composition of the iron carbon alloy of iron with two kinds of lattice structure: 910 DEG C for lattice structure with BCC alpha iron, above 910 DEG C with fcc lattice structure of gamma iron. If the carbon atom is squeezed into the lattice of iron, and does not destroy the lattice structure of the iron, such a substance is called solid solution. The solid solution formed by the dissolution of carbon to alpha iron is called ferrite, and its carbon dissolving ability is very low and the maximum solubility is not more than 0.02%. While the carbon dissolved into gamma iron in the formation of solid solution is called high carbon austenite, dissolved it, up to 2%.

Austenite is a high temperature phase of the iron carbon alloy. The austenite formed at high temperature at high temperature becomes an unstable undercooled austenite when it is undercooled below 727 degrees C. If the cooling rate is too low to below 230 C, the carbon atoms in austenite are no longer diffused. Austenite will be transformed into a carbon saturated solid solution, called martensite.