种激光熔覆制备改性复合Hf-Ta金属涂层的方法

• Format: Patent
• Language: Chinese
• Published: 15.12.2017
• Subjects: ALLOYS; CASTING; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; 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; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; METALLURGY; PERFORMING OPERATIONS; POWDER METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WORKING METALLIC POWDER

本发明公开了种激光熔覆制备改性复合Hf-Ta金属涂层的方法，该方法为：、将难熔金属打磨处理后酸洗，然后依次进行喷砂处理和脱脂处理；二、将混合粉末与分散剂置于球磨机中球磨混合均匀，得到改性复合Hf-Ta料浆；三、将改性复合Hf-Ta料浆预置于难熔金属表面，烘干后在难熔金属表面得到预置层，然后进行预烧结处理，在难熔金属表面得到预烧结层；四、对所述预烧结层进行激光熔覆，在难熔金属表面得到厚度为30μm～800μm的改性复合Hf-Ta金属涂层。本发明制备得到的改性复合Hf-Ta金属涂层能够显著提高难熔金属在超高温、低氧压环境中的抗氧化能力，可为难熔金属在超高温氧化环境或烧蚀环境中提供短时防护。 The invention discloses a method for preparing a modified composite Hf-Ta metal coating through laser cladding. The method comprises the steps that firstly, refractory metal is subjected to acid pickling after polishing treatment and then subjected to sand blasting treatment and ungrease treatment in sequence; secondly, mixed powder and a dispersing agent are placed in a ball mill to be subjected to ball milling and mixed evenly to obtain modified composite Hf-Ta slurry; thirdly, the modified composite Hf-Ta slurry is pre-placed on the surface of the refractory metal to obtain a pre-placed layer on the surface of the refractory metal after drying, then presintering treatment is conducted, and a presintered layer is ob