Thermal spraying method for impeller cover parts

• Main Authors: SUN ZHENLIN, XIN YUWU, ZHANG YANFEI, ZHOU QUAN, LIU HUI, LU SHAN, XU FENGXIN, QU YANLONG
• Format: Patent
• Language: Chinese; English
• Published: 07.12.2018
• Subjects: 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; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention discloses a thermal spraying method for impeller cover parts. The thermal spraying method is characterized in that after cleaning, sand-blowing and section-dividing, automatic spraying stroke of sectional zone-separating is adopted for spraying runner surfaces of impeller cover parts, so that good coverage, on a sprayed part, of a coating is guaranteed, and coatings at chamfering angles of runner surfaces with relatively small diameter dimensions can be prevented from too quick upward growth, and therefore, coating compactness is improved, and loose slots formed after machining the coatings are eliminated. The thermal spraying method guarantees thickness consistency, within the integral range, of the runner surfaces of the impeller cover parts, and is set once through mechanical-man control program; and the setting process is convenient and quick, and the production efficiency is high. 种叶轮罩类零件热喷涂方法，通过清洗、吹砂、分段后，再采用"分段选区"的自动喷涂行程对叶轮罩类零件流道面进行喷涂，既保证了涂层在喷涂部位良好的覆盖性，又可以防止直径尺寸较小流道面倒角处涂层过快向上生长，增加了涂层致密性，消除