Common types of failure

Common types of failure

Defective design (Structure design is not reasonable、Hardness is not enough、Improper material selection、Material status requirement is not reasonable)；

Material defects (loose、blow-hole、Segregation、shrinkage cavity、non-metallic inclusion、Flakes、surface corrosion and so on)

Casting defects (shrinkage cavity and blow-hole、chill and reverted chill、slag inclusion、poornodulizing、Segregation carbide、casting crack、graphite floatation and so on)

Forging defects (Overheating and Overburning、forging crack、hot shotness and copper brittleness、forging folds、high-temperature oxidation、Annealing is not sufficient、forging flakes、forging flow line)

Heat treatment defects(hardening crack、surface decarburization、carburize defects、nitriding defects、temper crack and so on)

cold machining defects (grinding defects 、cutting defects、cold heading defects、stamping/extruding/stretching defects and so on)