極細鋼線の表面改質のためのレーザ焼入れの数値解析と検証実験

抄録

Partial quenching technique on the surface of the ultra-thin steel wire by using YAG laser system is developed to modify the mechanical properties of the materials. The proper condition of the quenching is examined by the simulation technique for continuous process of heating and cooling. Here, the formal description of the transformation kinetics is evaluated on the reverse transformation in the heating process since the quenched region corresponds to the austenite-formed region in the process. The calculated conditions of the quenching are also examined by the experiments for the thin steel wire produced by drawing process because surface modification is expected to reinforce the mechanical properties. The laser power and the wire-feeding rate are found to alter the quenched region, and it is also examined by comparison with some experimental studies.