Turbine housing for a turbocharger

A turbine housing for an exhaust-gas turbocharger, the turbine housing comprising:

• a plurality of interconnected housing parts including:
• a bearing housing attachment flange;
• an exhaust-gas inlet duct receiving exhaust gas;
• a spiral duct receiving the exhaust gas from said exhaust-gas inlet duct and having a side facing away from said bearing housing attachment flange;
• an exhaust-gas inlet gap associated with said spiral duct;
• and
• an exhaust-gas outlet connector associated with said exhaust-gas inlet gap;
• at least some of said plurality of interconnected housing parts being formed as sheet-metal molded parts;
• and
• a central, one-part contoured component disposed on said side of said spiral duct facing away from said bearing housing attachment flange;
• said contoured component having a wall region disposed on said side of said spiral duct facing away from said bearing housing attachment flange, a boundary wall of said exhaust-gas inlet gap adjoining said wall region, and a sealing contour region adjoining said wall region;
• said contoured component being a cast component or a forged component connected to said plurality of interconnected housing parts at least some of which being formed as sheet-metal molded parts and disposed adjacent said contoured component;
• and
• said cast or forged component connected to said bearing housing attachment flange solely by said spiral duct.