Common stainless steel smelting, forging and rolling
Shrinkage cavity, shrinkage in the molten steel in the steel mold formation of shrinkage cavity, shrinkage cavity.
Transverse crack: refers to the ingot surface transverse crack, generally, on the ingot, general depth is shallow, the fine grinding can be overcome.
Longitudinal crack: refers to the ingot surface longitudinal crack, generally in the upper steel ingot and Angle, and the crack in the upper is deep, it is difficult to grind away.
Scar: ingot surface, shell’s shape or tumors of metals by splashing sticky called scar, the scar appears at the bottom of the ingot.
Double skin: the edge of the specimens in low power, presents an irregular dark loose, the surrounding, gathered a large number of oxide inclusions (mainly ferrous oxide) turn after this call.
Surface inclusions refer to the reduction of the ingot surface visible to the naked eye inclusions.
Surface porosity: refers to the exposure to the ingot surface visible to the naked eye of tiny holes, see more at the steel part, generally not deep, can finish the removal.
Crack: ingot surface produced by the extremely cold cracking, due to crack is often mixed with noise, it is called a burst.
Rose: ingot head of irregular convex, this defect is called rose, also called rising.
Checker: ingot surface reticular bulge call checker.
Hemp pit: ingot surface depressions called ma pit.
Double pouring: ingot surface visible again traces around the flash: exists in the ingot head or the tail is perpendicular to the sheet metal on the surface of the steel ingot is called flash.
Wings: the ingot surface is perpendicular to the chip called fins on the surface of the steel ingot.
Bubble: the bubble is due to the molten steel degassing wild or damp raw materials, etc. Reason resulting ingot steel system or just now, the defects of general points the subcutaneous bubbles and internal air bubbles. (prevent methods: steel oxidation-reduction deaeration boiling to the good, furnace to chat and all contact with the molten steel refractory to dry, the steel tank, the steamed stuffed bun, hand, mold, etc to dry, mold rusty spot clean, thin oil to all.)
White: white is a small crack, in the horizontal low power on the sample is radioactive irregular serrated cracks, on the longitudinal low-power sample is round or ellipse star silver points, so-called white dots. (the main cause is the cause of the hydrogen)