摘要
首钢三炼钢厂采用铁水脱硫-80tLD冶炼-LF(喂丝)精炼-4流方坯连铸工艺生产制动梁用微合金化钢15Mn2CrVNbE(%:0.13～0.17C、1.44～1.59Mn、0.30～0.60Cr、0.02～0.10V、0.02～0.05Nb、0.02～0.05Al)。通过控制钢中Al含量、吹氩、喂硅钙线和全程保护浇铸等工艺措施,149炉生产结果表明,铸坯中氧含量为(7～26)×10-6,氮含量为(29～79)×10-6。制动梁成品的力学性能为σs465～575MPa,σb630～720MPa,δ525%～34%,-40℃纵向冲击功36～183J,满足使用要求。
The microaUoying steel 15Mn2CrVNbE （0. 13 -0. 17C, 1.44 ～ 1.59Mn, 0. 30 ～0.60Cr, 0. 02 ～0.10V, 0.02 -0.05Nb, 0.02 ～0.05Al） for trigging girder has been produced by hot metal desulphurizing - 80 t LD melting - LF （feeding wire） refining - 4 strand billet concasting process at No3 steelmaking plant, Shougang. The production results （149 heats） showed that with control of Al content in steel, argon stirring, feeding silicon-calcium wire, whole course shielding casting technology, the oxygen content in billet was （7 -26）×10^-6, nitrogen content was （29 -79）×10^-6, and the mechanical properties of trigging girder products were σs 465 ～575 MPa, σb 630 ～720 MPa, δ5 25% -34% and -40 ℃ longitudinal impact energy 36 - 183 J, which met the requirement of service.
出处
《特殊钢》
北大核心
2006年第6期59-60,共2页
Special Steel
