Guide vane segment with radical securing elements

A method for the manufacture of a guide vane segment for a gas turbine, comprising the following steps:

• providing an unfinished guide vane segment with at least one radially outer shroud and one radially inner shroud, which extend along a respective arc and together form an annular segment, wherein, in the radial direction between the outer shroud and the inner shroud, a plurality of guide vanes are arranged adjacent to one another in the peripheral direction and are joined to the inner shroud and to the outer shroud in a material-bonded manner and, in particular, are joined in a one-piece manner, wherein, in an axial lengthwise direction, the outer shroud comprises an axially front end wall element and an axially rear end wall element in such a way that the outer shroud and the two end walls form a tub-like profile in lengthwise section, and with at least one unfinished radial securing element;
• aligning the unfinished guide vane segment relative to a linear grinding apparatus so that material can be removed from the unfinished radial securing element by means of the linear grinding apparatus;
• grinding of the unfinished radial securing element by the linear grinding apparatus until the unfinished radial securing element has assumed the form of a radial securing element with a support segment that has a support surface area, which lies in a first plane, the normal vector of which has vector components in the peripheral direction as well as in the axial direction or/and in the radial direction.