| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: steel contains components at a following ratio, wt %: carbon (C) 0.02-0.09, nitrogen (N) 0.025-0.12, silicon (Si) ëñ 0.25, aluminium (Al) ëñ 0.080, manganese (Mn) 0.55-1.8, chrome (Cr) 11.5-16, copper (Cu) up to 0.48, overall molybdenum (Mo) and half of tungsten (W/2) up to 0.90, nickel (Ni) up to 0.90, vanadium (V) up to 0.090, niobium (Nb) up to 0.090, titanium (Ti) up to 0.025, sulphur (S) up to 0.25, iron and formed during melting admixtures are the rest. Compound of steel satisfies the conditions 0.05ëñC+Nëñ0.17, Si+23AlëÑ0.20, Si+0.6Alëñ0.25, 0.00025ëñAlùNëñ0.0020, 6.5 ëñ F = (Cr+Mo) + 2(Si+V+Nb) - 27(C+N) -(Ni+Mn/2+Cu/3) ëñ13. ^ EFFECT: increased steel machinability, weldability, corrosion resistance and thermal conductivity. ^ 4 cl, 1 tbl |
