Abstract: The Φ160 mm non-quenched-tempered steel S38MnSiV(0.38~0.45C,0.55~0.75Si,1.40～1.55Mn, 0.08～0. 15V,0.020~0.050S,≤0.025P) has  been   developed   by  30t  EBT EAF-40tLF+VD-3. 16tingot-800/ 650×4 mill flow      sheet. Examination results showed that he oxygen content in finished products     was (8～13)×10^-6,nitrogen   content(128～186)×10^-6, and  hydrogen content(0.4~1.2)×10^-6; the structure and  mechanical properties   of Φ110  mm  bar  forged  by  Φ160  mm  rolled  products  of steel  S38MnSiV  all  met  the  requirement  of standard;  and  the  mean  value bending fatigue limit of crankshafts made of this steel was3633.3 N ·m with safety factor 1.771.

Key words: Non-Quenched-Tempered Steel S38MnSiV, High Strength and Toughness, Mechanical Properties

摘要： 采用30t EBT EAF-40 t LF+VD-3.16 t铸锭-800/650×4轧机流程开发了Φ160mm非调质钢S38MnSiV(%:0.38～0.45C、0.55～0.75Si、1.40～1.55Mn、0.08～0.15V、0.020～0.050S、≤0.025P)。检验结果表明,钢材中氧含量(8～13)×10^-6,氮含量(128～186)×10^-6,氢含量(0.4～1.2)×10^-6;Φ160mm非调质钢S38MnSiV锻成Φ110mm圆钢的组织和机械性能均满足标准要求,用该钢生产的曲轴中值弯曲疲劳极限为3633.3 N·m,安全系数1.771。

关键词: 非调质钢S38MnSiV, 高强韧性, 力学性能