| 摘要 |
The invention relates to a method for repairing flow channel segments of a turbomachine. The method comprises providing a monocrystalline or directionally solidified flow channel segment whose length and width extend along the flow channel, each being greater than the thickness thereof, and whose width and length delimit a surface which constitutes a bounding surface of a flow channel and has damage, cleaning the bounding surface to remove impurities, remelting at least a part of the bounding surface in a surface region so that melted material solidifies epitaxially in an inner region facing toward the unmelted material and forms a structural region in which the monocrystalline or directionally solidified structure is preserved, and that melted material solidifies in a polycrystalline fashion in an outer region which faces toward the flow channel and forms an edge region, and removing the edge region. |
| 主权项 |
1. A method for repairing a flow channel segment of a turbomachine, wherein the method comprises:
(a) providing a monocrystalline or directionally solidified flow channel segment, which has a length, a width and a thickness, the length and width extending along the flow channel and each being greater than the thickness, and the width and length delimiting a surface which constitutes a bounding surface of a flow channel and shows damage, (b) cleaning the bounding surface to remove impurities therefrom, (c) remelting at least a part of the bounding surface in a surface region in such a way that melted material solidifies epitaxially in an inner region facing toward unmelted material and forms a structural region in which a monocrystalline or directionally solidified structure is preserved, and that melted material solidifies in a polycrystalline fashion in an outer region which faces toward the flow channel and forms an edge region, (d) removing the edge region. |
