Nb-Ti微合金化钢QStE380TM汽车大梁用热轧钢板的研制  

Research and Production of Nb-Ti Microalloy Steel QStE380TM Hot Rolled Plate for Auto Beam by CSP Line

作　　者：王宝峰[1] 丁国[1] 赵丽萍[1] 王雪莲[2] 李德刚[2] 

机构地区：[1]内蒙古科技大学,包头014010 [2]包钢薄板坯连铸连轧厂,包头014010

出　　处：《特殊钢》2006年第2期49-51,共3页Special Steel

摘　　要：采用铁水预处理-210t顶底复吹转炉-LF精炼-2流立弯型CSP铸机（65mm厚铸坯）-6机架SMS轧机控轧控冷工艺试制了成分（％）为：0．04～0．08C，0．20～0．35Si，1．20～1．35Mn，≤0．015P，≤0．010S，0．015～0.025Nb，0.005～0．015Ti QStE380TM汽车大梁用6～12mm热轧钢板。检验结果表明，钢板组织为铁素体＋少量珠光体，晶粒尺寸4～7μm，其机械性能均符合标准要求，钢板不同方向屈服强度最大差值为30Mpa，抗拉强度最大差值20Mpa，大多数钢板常温冲击功为140～180J。The steel QStE380TM- 0.04～0.08C, 0.20～0.35Si, 1.20～1.35Mn, ≤0.015P, ≤0.010S, 0.015～ 0.025Nb, 0.005 ～ 0.015Ti 6 ～12 mmhot rolled plate for auto beam has been researched and produced by hot metal pretreament - 210 t top and bottom combined blown converter - LF refining - two strand vertical-bending concaster （65 mm slab） - 6-stand SiMS mill control rolling and coding process. The examination results showed that the structure of plate was ferrite ＋ minor pearlite with grain size 4 ～7 μm, of which the mechanical properties met to requirement of standard, the maximum difference of yield strength of plate at different direction was 30 MPa, the maximum difference of tensile strength was 20 MPa and the ambient impact energy of majority plate was 140 ～ 180 J. Material Index Nb-Ti Microalloying, CSP Process, Steel for Auto Beam

关 键 词：Nb-Ti微合金化 CSP工艺 汽车大粱用钢 

分 类 号：U465[一般工业技术—材料科学与工程]