Metal organization knowledge

1, metal: has not transparent, metal luster good thermal and electrical conductivity and the electric capacity increased with temperature decrease, rich ZhanXing ductility and characteristics of the material. Metal atoms inside with regularity of the arrangement of solid (i.e. crystals).

2, alloy: by two or more metal or metal and nonmetal composition, has the characteristics of metal material.

3, phase: alloy composition, structure, performance in the same part.

4, interstitial: is a (or more) group of atoms (compound) yuan into another group in the grid work of the yuan, and still keep another group of yuan grid work of the type of solid metal crystals, interstitial points interstitial and clearance displacement interstitial two kinds.

5, solid solution strengthening: because atoms into the grid work of the solute solvent gap or node, make the grid distortion happens, make the crystallology hardness and strength increases, this kind of phenomenon that solid solution strengthening phenomenon.

6, compounds: alloy group yuan between combination, to generate a new crystals with metal properties of solid structure.

7, mechanical mixture: by two kinds of crystal structure and composition of the alloy constituents, although both sides is a crystal, it is a kind of composition, independent of the mechanical properties.

8, iron meal all: carbon in alpha Fe (body structure of the heart cubic iron) of interstitial clearance.

9, austenitic: carbon in gamma-irradiation Fe (surface structure of heart cubic iron) of interstitial clearance.

10, cementite: carbon and the iron to form stable compounds (Fe3c).

11, pearlite: ferrite and cementite composition mechanical mixture (F + Fe3c carbon 0.8%)

12, ledebrite: cementite and austenitic mixture of machinery (including carbon 4.3%)