SURFACE-REFORMED EXHAUST GAS GUIDE ASSEMBLY OF VGS TYPE TURBO CHARGER, AND METHOD OF SURFACE-REFORMING COMPONENT MEMBER THEREOF

A novel exhaust gas guide assembly with an improved high-temperature sliding wear resistance, oxidation resistance, high-temperature strength or the like for a VGS turbocharger is provided. The invention is characterized in that a surface modification is applied to a component member of the exhaust gas guide assembly (A), such as adjustable blades (1), a turbine frame (2), a blade adjusting mechanism (3), or the like.