PROBLEM TO BE SOLVED: To provide a surface-treated material which has an improved bonding-force between an article to be treated and particles, and has an increased hardness of the surface of the article to inhibit the article from being deformed, and has a coating layer with the extended life due to the particles; a surface treatment method; and a surface treatment apparatus.
SOLUTION: The surface-treated material 1 is a member having the surface 2a treated by jetting the particles 3 onto the surface 2a of the article 2, while heating the surface 2a. The surface-treated material 1 is composed of the article 2, the particles 3 and a compound layer 4. The article 2 is made from an iron-based metallic material such as carbon steel, and is provided with the particles 3 and the compound layer 4. The particles 3 are made from a solid-lubricant-based material such as molybdenum disulfide, and from a metallic material such as tin. The compound layer 4 is an intermetallic compound formed by thermochemically reacting the article 2 with the particles 3, and thus combines the article 2 with the particles 3 to improve adhesiveness and bondability between the article 2 and the particles 3.