析出硬化型熱間工具鋼(3Ni-3Mo鋼)の製造性について

概要

論文の詳細を見る
Precipitation hardening hot work die steel containe low percent of carbon (about 0.2%) and strong secondary hardening element such as molybdenum. In case of usual hot work die steels, a die is machined from a steel in annealed condition and heat-treatment is carried out after machining. So, distortion due to heat-treatment is unavoidable. On the other hand, there is no distortion problem with precipitation hardening hot work die steel, because it is possible to be machined after heat-treatment (quenched and pre-tempered at about 400°C). Moreover, die life is prolonged because die surface shows secondary hardening during hot working. Precipitation hardening hot work die steel has marked advantages such as mentioned above, so it is expected to use for press forging dies. In this paper, manufacture and properties of 0.2C-3Ni-3Mo precipitation hardening hot work die steel are explained.