303 through hardened screw better corrosion resistance

Introduction: 303 through  hardened screw, has better corrosion resistance  Tail annealing treatment, greatly improving the toughness of the screw CNC full grinding thread, tooth root top concentric and tooth bottom flatness high precision, can reduce the shear heat. Application: Low acid plastic + GF15 following, such as PMMA, PC and so on Temperature ≤400 ℃ Optical lenses, cosmetic packaging and so on Materials and Process: Material origin: Japan The main components: Cr, V, Mo and so on Heat treatment: vacuum quenching, hardness HRC48-52. (1020-1050 vacuum quenching, high temperature tempering 550-570 more than three times, the rear high temperature annealing softening treatment) Surface treatment: PVD coating (TiN, TiCN, TiAlTiN)