Abstract: The effect of C and Si content on mechanical property of low carbon cold-rolled steel(/% ：0.0051 ~0.0344 C,0.008 ~0.054 Si,0.28 ~0.30 Mn,0.023 ~0.026 P,0. 004 - 0.007 S. 0.044 ~0. 060 Al)has been studied. Industrial process is hot metal pretreatment-80tBOF-RH-continuous casting - hot rolling-acid pickling-cold rolling. Results show that the higher the C or Si content, the higher the strength and hardness, the lower the elongation. Cold rolling test was carried out in the laboratory,the test material was low carbon steel hot rolled (/% :0.0112C,0.009Si,0.30Mn,0.025P,0.006S,0.052Al) which produced in plant. Results of cold rolling test show that when the cold rolling reduction ratio increases from 41% to 57% , strength and hardness gradually increase, the elongating slightly elevate, When the content of C was 0. 005% ~ 0. 010% ,Si was ≤0.012% and cold rolling rate was 40% ~ 50% ,the tensile strength (Rm) of cold rolled sheet was less than 660 MPa and hardness (HRB) was 86 - 89. meeting technical requirement.

摘要： 研究了不同C、Si含量对低碳钢冷轧板(/%:0.005～0.034 C,0.008～0.054 Si,0.28～0.30 Mn,0.023-0.026 P,0.004～0.007 S,0.044～0.060 Al)力学性能的影响,工业生产流程为铁水预处理-80tBOFRH-连铸-热轧-酸洗-冷轧。结果表明:C、Si含量越高,强度、硬度越高,伸长率越低。采用工业生产的Q195热轧板(/%:0. 0112 C,0.009 Si,0.30 Mn,0.025 P,0.006 S,0.052 Al)进行实验室冷轧试验,试验结果表明冷轧压下率由41%升高到57%,强度、硬度逐渐降低,伸长率略有升高.当C含量为0.005%～0.010%, Si含量为≤0.012%,冷轧下率为40%～50%,Q195冷轧板的抗拉强度(Rm)≤660MPa,(HRB)硬度值为86～89,满足技术要求.

关键词: 低碳钢冷轧板, C含量, , Si含量, 冷轧压下率, 力学性能