| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a turbine housing and a turbocharger capable of improving their reliability.SOLUTION: A turbine housing 30 formed of a light metal has a bypass passage 26 extending bypassing a turbine wheel formed therein. The opening peripheral edge of a through-hole 33 as part of the bypass passage 26 serves as a valve seat part 41 of a waste gate valve which switches opening and closing of the bypass passage 26. The valve seat part 41 is reinforced by forming a built-up part 34 by build-up welding.</p> |
