| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treatment agent of a steel product.SOLUTION: A surface treatment agent of a steel product contains a sodium silicate solution and at least one kind of metal compound selected from the group consisting of a metal oxide and a carbonate. A surface treatment method of a steel product using the surface treatment agent includes spraying the surface treatment agent onto the surface of the steel product, avoids oxidation and decarburization of the steel product in heat treatment of the steel product, and thus achieves carburization and surface hardening.SELECTED DRAWING: Figure 4 |
