| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: they are subjected to hardening by heating to 970-1020 C and cooling in oil, then to a double tempering at 620-670 C, with the first tempering carried out for 4.5-5 hours, and the second one for 3.5-4.5 hours, and cooled after each tempering in water or oil. ^ EFFECT: increased impact strength across the deformation fibres of shafts made of steel 14H17H2. ^ 1 ex, 4 tbl |
