燒入高速度鋼の常温に於ける Stabilization について

概要

論文の詳細を見る
It has been found that the Ar" transformation by subzero-cooling of high speed steels has intimate relations with the holding time at room temperature of oil quenched steels, and that the above phenomenon may be dealt with in the same way as in the case of stabilization of many other steels. The longer the holding time at room temperature after quenching is, the less the amount of the Ms' transformation on the followed subzero-cooling becomes and the lower the Ms' temperature drops. On the subzero-cooling till -150℃ of tempered steels, the secondary Ar" point can be found at -25° in the case of 550°-30 min. tempering. By further tempering at 600℃ of the above treated (quenched, tempered and subzero-cooled) steel, the ternary Ar" transformation is found distinctly at above room temperature on cooling from the tempering temperature.
社団法人日本鉄鋼協会の論文
1951-09-25