SURFACE PIT FORMING METHOD AND MEMBER WITH SURFACE PIT

摘要

A surface pit forming method and a surface pit-formed object; the surface pit forming method, characterized by comprising a member preparing process producing a member having a surface layer part formed of a weak part and a strong part higher in strength than the weak part, and an injection process injecting a high-pressure fluid onto the surface of the member to remove at least a part of the weak part so as to form a pit, whereby the weak part is formed on the surface layer part of the member forming the surface pit, and the high-pressure fluid is injected onto the surface layer part to remove the weak part of the member surface layer part from the strong part in order to form a pit in the portion from which the weak part has been removed.