Patent ID: 9562279
Date: 2017-02-07
CPC Classifications: B23B,B23H,B23K,C23C,F02F,F05C,Y10T

Claim:
1. A prespray processing method comprising: a broken surface forming step of using a cutting tool to form groove parts on a surface of a member where a thermal spray coating is to be formed while forming broken surfaces on tips of ridge parts generated by formation of the groove parts, each broken surface being formed by ripping a part of the ridge part by a chip, which is originally part of the member, generated from the member at the time of cutting; and a finely roughened portion forming step, performed after the broken surface forming step, of forming finely roughened portions, finer than the broken surfaces, on the groove parts by performing a process on the groove parts among the ridge parts and the groove parts by use of a finely roughened portion forming device different from the cutting tool, wherein each of the ridge parts is defined by two sloping surfaces extending along directions which meet to form an acute angle pointing perpendicular to the surface of the member, and each of the two sloping surfaces is smoothly connected to an inner surface of the groove part arranged next to the each of the ridge parts.