Nb含量及退火温度对冷轧低合金高强钢力学性能的影响

发布时间：2018-09-07 21:38

【摘要】：利用实验室退火炉对冷轧低合金高强钢进行连续退火工艺模拟,研究退火温度对其组织与性能的影响,并通过改变钢中Nb成分的含量,研究化学成分Nb对热轧板性能以及对退火板性能的影响。结果表明:在790℃以下,随着退火温度的逐渐升高,退火板的屈服强度和抗拉强度显著降低,伸长率显著升高;在790℃以上,随着退火温度的逐渐升高,退火板的屈服强度和抗拉强度下降趋势较小。增加钢中Nb的含量能够显著提高热轧板和退火板的强度,增加0.01%的Nb大约能使热轧板的抗拉强度提高34 MPa,退火板屈服强度提高14 MPa。
[Abstract]:The continuous annealing process of cold rolled low alloy high strength steel was simulated by laboratory annealing furnace. The effect of annealing temperature on the microstructure and properties of the steel was studied, and the content of Nb in the steel was changed. The effects of chemical composition Nb on the properties of hot rolled sheet and annealed plate were studied. The results show that under 790 鈩，

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