Recently, strengthened environmental regulations have required the downsizing of gasoline engines, and as a result, demand for turbochargers has rapidly increased. The vane turbocharger controls flow gases toward turbine, it is manufactured by powder metallurgy due to its complex shape. Gasoline engines high exhaust gas temperature (~1000<sup>o</sup>C), thus, Alloy1.4957 (GX15CrNiCo...