spring steel, spring steelmaking process and spring steel fabricated with such steel

摘要

spring steel, spring steelmaking process and spring steel fabricated with such steel. The present invention relates to a spring steel of high air fatigue strength and under corrosive conditions and of high cyclic deformation resistance, of percentage composition by weight: c = 0.45 - 0.70%; si = 1.65 - 2.50%; mn = 0.20 - 0.75%; cr = 0.60-2%; ni = 0.15-1%; mo = dashes - 1%; v = 0.003 - 0.8%; cu = 0.10-1%; ti = 0.020 - 0.2%; nb = dashes - 0,2%; ai = 0.002 - 0.050%; p = dashes - 0.015%; 5 = dashes - 0.015%; o = dashes - 0.0020%; n = 0.0020 -0.0110%; the balance being iron and impurities resulting from the preparation, and whose equivalent carbon content ceq, calculated according to the formula ceq% = [c%] + 0,12 [si%] + 0,17 [mn%] - 0 , 1 [ni%] + 0,13 [cr%] - 0,24 [v%] is between 0,80 and 1,00% and has a hardness greater than or equal to 55 after hardening and tempering. hrc.