Turbocharger turbine wheel with alpha-alumina coating and method of manufacturing same

• Main Authors: RENOLD, PETER, MULUKSAN PADMAVATHI
• Format: Patent
• Language: Chinese; English
• Published: 19.08.2022
• Subjects: BLASTING; 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; ENGINE PLANTS IN GENERAL; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; WEAPONS

An alpha-alumina coated turbocharger turbine wheel includes: a hub portion; a plurality of blades disposed about the hub portion, each blade of the plurality of blades having a leading edge and a trailing edge; a centerline axially passing through the hub portion; and an aft side wall radially defined between the leading edge and the centerline of each of the plurality of blades. A turbocharger turbine wheel is made of a metal alloy and an alpha-alumina surface coating. An alpha-alumina surface coating may be disposed only on the hub portion, the plurality of blades, and a radially outer portion of the aft sidewall. The radially outer portion is defined between a radial distance from the centerline and a leading edge of each of the plurality of blades. Alternatively, an alpha-alumina surface coating may be disposed on the hub portion, the plurality of blades, and the entire aft sidewall. 一种α-氧化铝涂覆的涡轮增压器涡轮叶轮包括：毂部分；绕毂部分设置的多个叶片，所述多个叶片中的每个叶片具有前缘和后缘；中心线，其轴向地穿过毂部分；以及后侧壁，其径向地限定在所述多个叶片中的每个叶片的前缘和中心线之间。涡轮增压器涡轮叶轮由金属合金和α