| 摘要 |
FIELD: metallurgy.SUBSTANCE: steel contains in wt %: carbon 0.10-0.15, silicon from 0.2 to below 0.3, manganese 0.9-1.5, chrome 1.0-1.4, nickel 0.1-0.5, molybdenum from 0.5 to 0.6, copper 0.1-0.5, niobium 0.02-0.06, aluminium 0.01-0.06, boron 0.0015-0.005, nitrogen from over 0.01 to max. 0.012, phosphorus max. 0.015, sulphur max. 0.005, iron and inevitable admixture - rest.EFFECT: steel has increased impact toughness at negative temperatures, high strength and weldability upon plasticity keeping.2 tbl, 1 ex |
