30t EAF-LF-VD-13t铸锭流程生产14Cr1Mo钢的工艺实践  

Practice of Process for Production of Steel 14Cr1Mo by 30t EAF-LF-VD-13t Casting Ingot Flowsheet

作　　者：祁庆花 赵子文 韩文科 杨德生 

机构地区：[1]兰州兰石能源装备工程研究院有限公司,兰州730314 [2]甘肃省高端铸锻件工程技术研究中心,兰州730314

出　　处：《特殊钢》2017年第2期19-22,共4页Special Steel

基　　金：甘肃省科技计划资助项目(2015GS05896)

摘　　要：试验14Cr1Mo钢(/%:0.12C,0.57Si,0.48Mn,0.003P,0.001S,1.20Cr,0.42Mo,0.01V,0.001Nb,0.017A1,0.003As,0.001 Sb,0.002Sn)64 mm×160 mm锻坯的冶金工艺流程为30 t EBT EAF-LF-VD-13 t铸锭-锻造。通过采用优质废钢,控制EAF终点[P]≤0.002%,终点[C]0.07%~0.10%,出钢加Al预脱氧,LF白渣时间≥30min,VD 67 Pa≥25 min,VD后喂0.35 kg/t Ca-Si线等工艺措施,钢中[H]为1.5×10^(-6),[O]17×10^(-6),[N]70×10^(-6),各类非金属夹杂物为0,5级。经930℃空冷预备热处理,910℃水冷+700℃空冷回火,690℃4~20 h炉冷馍拟焊后消除应力处理后的该钢力学性能满足参考标准NB/T47008-2010的要求。The metallurgical process flowsheet of 64 mm × 160 mm forged slab of tested steel 14CrlMo （/% ： 0. 12C, 0. 57Si, 0.48Mn, 0. 003P, 0.001S, 1.20Cr, 0.42Mo, 0.01V, 0.001Nb, 0.017A1, 0.003As, 0.001Sb, 0.002Sn） is 30 t EBT EAF-LF-VD-13 t casting ingot- forging. With the process measures including using quality scrap, controlling EAF end [ P] ≤0. 002% and end [ C ] 0. 07% -0. 10%, adding Al in EAF tapping for pre-deoxidization of liquid, LF maintai- ning white slag ≥30 min and VD 67 Pa ≥125 min, and after VD adding 0. 35 kg/t Ca-Si wire, the gas content in steel is 1. 5 × 10^-6 [ H], 17 × 10^-6 [ O] and 70× 10^-6 [ N], the ratting of each nonmetallic inclusions in steel is 0. 5, and with conditioning treatment at 930 ℃, A. C. , quenching at 910 %, W.C. and tempering at 700 %, A. C. , and simulate heat treatment after welding （PWHT） at 690 ℃ for 4 ~ 20 h, F. C. , the mechanical properties of steel meets the requirement of reference standard NB/T470008-2010.

关 键 词：14Cr1Mo钢 30t EAF-LF-VD 工艺实践 夹杂物 力学性能 

分 类 号：TF76[冶金工程—钢铁冶金] TG142.33[一般工业技术—材料科学与工程]