| 摘要 |
PROBLEM TO BE SOLVED: To provide an abradable coating suitable for non-reinforced blade tip in a flow machine in which a partial surface, that is, an abraded surface is generated. SOLUTION: This profiled surface is formed by a rib 15 surrounding a void- like recessed part 11. The abradable coating has a pattern formed by a strip-like component element 5, the component element is positioned along in the direction of the rib on a line 45 joining the bending positions 41 to 42 in the reference grid 40. In a portion of the worn surface exceeding at least 80 to 90%, the rib direction is made different from the moving direction V of the blade tip. At least 2/3 of the abraded surface, the moving direction is shifted at an angle of 30 deg.C or more from the rib direction, preferably at an angle of 45 deg.C or more. |
