[G] Metals

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[1] Effect of High Purity on Low-Temperature Tempering of Carbon Steel (Part II)

○Saburou yamagata¹, Masahiro Okawa², Toshinori Kuroki², Morita Eiji³, Kenji Abiko⁴ (1. Yamagata PE Office, 2. Polytechnic Univ. of Japan, 3. Toho Zinc Co., Ltd., 4. Tohoku Univ.)

Keywords:

high purity,blue brittleness,absorbed energy,carbon steel,reduction ratio

Quenched carbon steel exhibits blue brittleness at 300–350 °C, though its mechanism remains unclear. An Fe–0.34%C alloy was prepared using high-purity iron to investigate this phenomenon. Hardness and rolling reduction tests were also conducted on SHP50 specimens tempered at 320 °C.