Patent ID: 6391124
Filing Date: 2002-05-21
Classification: C22C,C23C,F16C

Abstract:
A non-heat treated soft-nitrided steel part manufactured from a steel characterized by containing, by mass %,0.35 to 0.45% of C, 0.05 to 1.00% of Si, 0.3 to 1.0% of Mn, 0.03% or less of P, 0.15% or less of Cr, 0.001 to 0.03% of Ti, 0.03% or less of V, 0.010 to 0.020% of N, 0.08% or less of Al, 0.05 to 0.30% of Pb, 0.10% or less of S, 0.003% or less Ca, the balance being Fe and incidental impurities; and further characterized by satisfying the following formulas (1) to (3):Fn1=âˆ’141.5(C %)âˆ’19.6(Mn %)+1280(N %)+95.6&lE;60â€ƒâ€ƒ(1) Fn2=âˆ’103.8(C %)+59.1(Mn %)+850.4(N %)+360.9&gE;350â€ƒâ€ƒ(2) Fn3=âˆ’13.4(C %)âˆ’3.45(Mn %)+112.7(N %)+13.2&gE;7â€ƒâ€ƒ(3).