Methods of manufacturing a tandem guide vane segment

A method for manufacturing a tandem guide vane segment that comprises an outer platform, a front guide vane, and a rear guide vane, wherein the front guide vane and the rear guide vane are arranged fixedly spaced apart on the outer platform with the front guide vane overlapping the rear guide vane by a fixed distance in an axial direction, wherein the method comprises:

• manufacturing an integral front segment section that comprises the front guide vane and a front section of the outer platform;
• manufacturing an integral rear segment section that comprises the rear guide vane and a rear section of the outer platform;
• connecting the integral front segment section and the integral rear segment section;
• manufacturing the integral front segment section to include a rear limiting line to the integral rear segment section in an area of the outer platform;
• manufacturing the integral rear segment section to include a front limiting line to the integral front segment section in the area of the outer platform;
• wherein the integral front segment section and the integral rear segment section form a connection along the rear limiting line and the front limiting line, wherein the connection has at least one chosen from an S-shape and a Z-shape;
• and
• wherein the front guide vane does not protrude beyond the rear limiting line, and the rear guide vane does not protrude beyond the front limiting line.