17wt%Cr-11wt%Ni-2tw%Moおよび18wt%Cr-15wt%Ni-2wt%Moステンレス鋼の4.2°Kにおける変形挙動
1972 年 7 巻 3 号 p. 133-143
詳細
1972 年 7 巻 3 号 p. 133-143
Mechanical properties, microstructures, saturation flux density, and electrical resistance were investigated of 17wt%Cr-11wt%Ni-2wt%Mo and 18wt%Cr-15wt%Ni-2wt%Mo stainless steels deformed at 4.2°K. Elastic limit, tensile strength, and elongation were 47.5kg/mm2, 135kg/mm2, and about 30% for the annealed 17wr%Cr-11wt%Ni-2wt%Mo, and 55kg/mm2, 125kg/mm2, and about 38% for the annealed 18wt%Cr-15%Ni-2wt%Mo, respectively. With increasing the percent of pre-strain at 295°K, the elongation and the elastic limit increased and the hardening coefficient and the saturation flux density decreased for 17wt%Cr-11wt%Ni-2wt%Mo.
A slight martensite induced magnetically was observed in the 17wt%Cr-11wt%Ni-2wt%Mo exposed previously under a magnetic field of 80kOe for 6min 4.2°K. A discontinuous increase in the electrical resistance was observed during deformation at 4.2°K for each steel. The microstructures of the above mentioned steels discussed.
