| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a thermally-spayed cylinder block in which a micro thermally-sprayed particle is prevented from falling from a thermally-sprayed membrane at an actual operation, and both low friction by mirror-forming the thermally-sprayed membrane and the reduction of an oil consumption amount are achieved, in the cylinder block in which a metal material is thermally sprayed on a bore internal face, honing processing is applied on its surface, and the thermally-spayed membrane is obtained.SOLUTION: A manufacturing method of a thermally-sprayed cylinder block 10 having a slide face which is formed of a thermally-spayed membrane at an internal face of a bore 11 at least includes: a process for thermally-spraying a metal material to the bore internal face; a process for applying honing processing to the membrane which is formed by a thermal spray; and a removal process of a weakened particle which makes the weakened particle being a metal particle which is lower than prescribed adhesion strength fall by imparting stress on a membrane surface which is applied with the honing processing (for example, a process for supplying fluid to the membrane surface after the honing processing at 8 to 38 MPa). By applying the stress of a desired magnitude, a particle which exists on the membrane surface, and is not strongly integrated therewith (weakened particle) is removed. By this constitution, a fall of the particle at an operation of an engine can be surely avoided.SELECTED DRAWING: Figure 3 |
