摘要
介绍了在包钢CSP生产线研制540 MPa级热轧双相钢的工业化生产试验。采用C-Mn钢为原料,分别利用原层流冷却能力和超快冷设备,通过控制轧制和控制冷却工艺,成功开发出540 MPa级热轧双相钢160 t。试制的钢带具有屈服强度低、屈强比小、伸长率大、n值高及低温冲击韧性良好等特点,并具有拉伸曲线无屈服平台、马氏体呈岛状均匀分布在铁素体晶界上等典型双相钢的特征。经汽车制造厂试用,制成了汽车横梁和重型翻斗车护板等构件。
Pilot production of 540 MPa hot rolled dual-phase strip at Baotou CSP Plant is introduced. 160 t 540 MPa C-Mn hot rolled dual-phase strip was produced by controlled rolling and controlled cooling using laminar cooling and UFC（ultra-fast cooling） equipment. The strips have low yield stress, small yield ratio, high elongation, high n-value and good low temperature impact toughness. No yield point on the tensile curve is observed, the island martensite is distributed among the ferrite grain boundaries uniformly. The produced dual-phase steel was used for making beam and frame cover of heavy-duty truck at the automobile manufactory.
出处
《钢铁》
CAS
CSCD
北大核心
2007年第9期63-67,共5页
Iron and Steel
关键词
CSP
热轧双相钢
层流冷却
超快冷
CSP
hot rolled dual-phase steel strip
laminar cooling
UFC
