METHOD FOR CONTROLLING GRAIN BOUNDARY SEGREGATION AND SEGREGATION EMBRITTLEMENT UTILIZING MAGNETIC FIELD ACTION

摘要

PPROBLEM TO BE SOLVED: To provide a method for controlling recycling of a steel material, by which the grain boundary concentration in the harmful elements can be reduced to the degree the same as that in the grains, in the recycling of a steel material, by solving the problem that, in the conventional technique, harmful elements such as Sn and Cu mainly segregate on crystal grain boundaries, and as a result, the bonding strength of the grain boundaries is remarkably weakened, and thus the material itself embrittles, in the recycling of the steel material. PSOLUTION: In this method, in the recycling of a steel material, utilizing a magnetic field action, the grain boundary segregation of harmful elements is controlled, and segregation embrittlement is controlled, thus fracture toughness value equal to that in pure iron can be obtained. PCOPYRIGHT: (C)2006,JPO&NCIPI