Development of High Cr Sintered Stainless Steel with High Heat and Wear Resistance

Against the background of environmental problems, the market for variable nozzle turbochargers, which enable countermeasures for improved fuel economy and exhaust gas regulations, has grown rapidly in recent years. Because the nozzle ring is a main part which is used under a particularly severe temperature environment, even among turbocharger parts, high Cr cast steel is generally used. In response to market needs for further improvement in heat resistance and cost reduction.