Spring steel, method for producing a spring using said steel and a spring made from such steel

摘要: The invention relates to spring steel having increased fatigue strength in air and corrosive environments high resistance cyclical slackening. composition of said contains the following components as expressed percentages by weight, namely: C = 0.45 0.7 %; Si 1.65 2.5 Mn 0.2 0.75 Cr 0.6 - 2 Ni 0.15 1 Mo trace V 0.003 0.8 Cu 0.1 Ti 0.02 Nb Al 0.002 0.05 P 0.015 S O N 0.011 %, remainder comprising iron impurities resulting from production. Moreover, equivalent carbon content Ceq, which is calculated using formula Ceq % [C %] + 0.12 [Si %]+ 0.17 [Mn [Ni 0.13[Cr 0.24 [V %], between hardness quenching tempering greater than or equal 55HRC. also a method for producing thus produced.