Assembly for a stator stage of a turbomachine, the assembly comprising an outer shroud and at least one stationary vane

An assembly for a stator stage of a turbomachine, the assembly comprising:

• an outer shroud presenting a transversely-aligned series of openings for mounting stationary vanes, each including a platform that is suitable for penetrating into a respective one of said openings so as to enable each stationary vane to be mounted by welding between the edge of an opening and the outline of the platform, each opening having an inner segment opening into the inside face of the shroud and an outer segment opening into the outside face of the shroud, the outline of the outer segment surrounding, in radial projection, the outline of the inner segment, thereby defining a bearing face facing towards the outer segment, the shroud not including any other holes for mounting the vanes, and the outline of the outer segment presenting the shape of a quadrilateral, in particular a rectangle;
• and
• at least one stationary vane comprising a root and a top with the body of the vane extending therebetween, which body is connected to the top by an engagement portion, the top including a non-pierced platform that is received in a respective one of said openings prior to the welding step so that an inside face of the platform bears against bearing face of the shroud, the outline of the platform presenting a shape that is identical to the outline of the opening.