X線回折半価幅法による冷間鍛造下の鋼材の加工硬化とバウシンガ効果の評価
1989 年 38 巻 427 号 p. 398-403
詳細
1989 年 38 巻 427 号 p. 398-403
Work hardning of a steel in the cold forging process affects strongly the tool life. In the present paper, work hardening behaviors of various kinds of steels in three typical processes, upsetting, forward extrusion and backward extrusion were studied by the measurements of a change in the forming load and the half-value breadth of X-ray diffraction profile which reveals approximate dislocation density.
It was found that a significant Bauschinger effect appears with the combination of drawing and upsetting, but rarely appears with the other combination such as drawing and forward extrusion, and drawing or upsetting and the subsequent backward extrusion.
