Preparation method of FeCrAl/Cr composite coating

• Main Authors: HUANG WEIJIU, LIAO HAIYAN, ZHU PENGZHOU, RUAN HAIBO, ZHANG TENGFEI
• Format: Patent
• Language: Chinese; English
• Published: 28.12.2021
• Subjects: ALLOYS; 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; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a preparation method of a FeCrAl/Cr composite coating. The preparation method sequentially comprises the steps of Zr alloy matrix pretreatment, Cr coating preparation and FeCrAl coating preparation. In the Cr coating preparation process, arc ion plating is adopted for depositing a Cr coating on the surface of a pretreated Zr alloy matrix. In the deposition process, the bias voltage is adjusted to range from-150 V to-200 V, and the bias voltage is adjusted to range from 600 V to 650 V every 1 h and kept for 3 min to 5 min. In the FeCrAl coating preparation process, arc ion plating is adopted for depositing a FeCrAl coating on the surface of the Cr coating. In the deposition process, the bias voltage is adjusted to range from-200 V to -250 V, and the bias voltage is adjusted to range from 400 V to 600 V every 1 h and kept for 3 min to 5 min. The FeCrAl/Cr coating deposited through PVD solves the technical problem that gaps between crystal grains are large due to a PVD method, and the co