Pitting: steel wire surface appears serious oxidation of punctate or patchy distribution of pits.Bamboo: steel wire along the longitudinal period of uneven thickness, shape like bamboo.The appearance of the surface of the steel wire in the straightening process, the thread roll.Oxidation: the oxidation of the surface of the steel wire and the contact of the high temperature oxidation furnace gas to form a layer of hard brittle oxide.Oxide film: a thin layer of dense oxide is formed on the surface of the steel wire, which is not easy to crack, and can only be partially peeled off when it is bent or deformed.
Stretch marks: obvious groove or rib steel wire surface longitudinal exist, only slight renders the surface shiny phenomenon is not smooth.Folding: steel wire surface along the length direction of the metal overlap is Xuan. Often in the form of a straight line, but also the formation of a curve or zigzag. In the metallographic examination, the iron oxide inclusions and decarburization layer are usually included in the folding.A concave part of the surface of a steel wire.Rust: local and overall oxidation on the surface of steel wire.Pitting: steel wire surface appears serious oxidation of punctate or patchy distribution of pits.Bamboo: steel wire along the longitudinal period of uneven thickness, shape like bamboo.
Crack: the longitudinal crack, crack and crack on the surface of steel wire.Rip (thorn): naked eye visible small transverse cracking steel wire surface, showing the tongue or other shapes.Delamination: longitudinal steel wire local or long divisionScab (scar): the appearance of yellow oxidation scar on the surface of steel wire
