METHOD FOR QUICKLY DISPLAYING SEGREGATION STATE OF STEEL HAVING HIGH RESOLUTION AND SOLIDIFIED TEXTURE AND TRANSFER METHOD

摘要

PURPOSE:To provide the method for quickly detecting and recording the segregation state and the solidified texture of steel in a broad range in high detecting capability and resolution. CONSTITUTION:Strong-acid corrosion liquid 2 containing picric acid, cation of Cu and the like is used. A metal sample 1, whose surface under inspection is polished and finished, is used as an anode. Metal 3, whose ionization tendency is equal to Cu or the less, is used as a cathode. Then, electrolytic corrosion is performed with a suitable current density. Thereafter, the surface of the sample is washed with water. After the sample is immersed into alkaline solution, washing with water and drying are performed. Thereafter, organic high-viscosity liquid is applied on the surface and then wiped out. Finish polishing is performed with polishing paper wigh proper roughness. Thus, the segregation state and the solidified texture are displayed more cleanly. A transparent thin film, on one surface of which a bonding agent is applied, is brought into tight contact with the surface. The film is attached to ground paper or the like, and the segregation state and the solidified texture are transferred. Thus, the segregation state and the solidified texture of the steel piece can be evaluated quickly and highly accurately. The method contributes to the achievement of the improved accuracy and the quick speed in quality control of the steel piece and the early development of the segregation improving technology furthermore.