| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: steel contains carbon, manganese, silicon, sulphur, phosphorus, chrome, nickel, copper, nitrogen, aluminium, titanium, niobium and iron at the following component ratio, wt %: carbon of more than 0.007 - 0.009, manganese 0.10 0.14, silicon ëñ 0.02, sulphur ëñ 0.013, phosphorus ëñ 0.012, chrome ëñ 0.02, nickel ëñ 0.03, copper ëñ 0.04, nitrogen ëñ 0.006, aluminium 0.030.06, titanium (2.4S+3.43N) (2.4S+3.43N)+0.03, niobium 7.75C7.75C+0.02, iron is the rest, where (S), (N), (C) - content of sulphur, nitrogen and carbon in steel. It has ultimate strength âu=270350 N/mm2, yield strength äëñ180 N/mm2, relative elongation â4ëÑ38 %, plastic anisotropy factor r90ëÑ1.8, strain strengthening parameter n90ëÑ0.22. ^ EFFECT: improving steel application properties. ^ 1 ex |
