Bacteriostatic thin-wall stainless steel pipe and preparation method thereof

• Main Authors: ZHAO ZHIJIANG, MIAO DEWEI
• Format: Patent
• Language: Chinese; English
• Published: 03.08.2021
• Subjects: ALLOYS; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention belongs to the technical field of stainless steel processing, and particularly relates to a bacteriostatic thin-wall stainless steel pipe and a preparation method thereof. The surface of the stainless steel pipe is provided with a bacteriostatic strengthening layer, and the stainless steel pipe comprises the following chemical components, by weight, 17.50-19.50% of Cr, 8.00-10.50% of Ni, 0.20-0.40% of Mo, less than or equal to 2.00% of Mn, less than or equal to 0.75% of Si, less than or equal to 0.10% of N, less than or equal to 0.07% of C, less than or equal to 0.04% of P, less than or equal to 0.03% of S and the balance of Fe and inevitable impurities. The bacteriostatic strengthening layer is an L-CPA/Cu/C composite film. The bacteriostatic strengthening layer endows the surface of the stainless steel pipe with good bacteriostatic performance, greatly improves the surface hardness, wear resistance and corrosion resistance, and avoids the adverse effect on the hot working performance caused by