【摘要】 采用热模拟试验和工业试验研究了卷取温度、冷却速度等工艺参数对700 MPa级高强耐候钢中的MA组元和力学性能的影响。结果表明,随着卷取温度的提高,钢中的MA组元数量降低,尺寸减小;随着冷却速度的提高,MA组元分布更加弥散,但数量略有增加。工业试制结果表明,钢带在600~610℃卷取时可有效降低MA组元数量,细化MA组元尺寸,并可获得较高的屈服强度和良好的塑性。更多还原

【Abstract】 The effects of processing parameters such as coiling temperature and cooling rate on MA islands and mechanical performances of high strength weathering steel were studied by thermomechanical simulation experiments and industrial production.The results show that with other parameters remaining constant,the fraction and the size of MA islands decrease gradually with an increase in the coiling temperature;when the coiling temperature remains unchanged,the MA islands are distributed more dispersedly and the fraction of the MA islands increases slightly with an increase in the cooling rate;when coiled at between 600 ℃ and 610 ℃,the yield strength of the trial-produced strip reaches a peak value,whereas the elongation of strip increases with the increase in the coiling temperature.更多还原