Forged Steel parts is the result of Leng Duan, Leng Dun, such as forging, forged cold working method, the material inside the or Forged Steel parts is the result of Leng Duan, Leng Dun, such as forging, forged cold working method, the material inside the organization to become more denseCrystal Structure of improved materials, eliminating gapsForged round steel is mainly used in the mechanical ...