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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。
The effects of coiling temperature and cooling rate on the mechanical properties and mechanical properties of 700 MPa high strength weathering steels were studied by means of thermal simulation and industrial tests. The results show that with the increase of coiling temperature, the number of MA components in steel decreases and the size decreases. With the increase of cooling rate, the distribution of MA components is more dispersed, but the quantity increases slightly. Industrial trial results show that when the strip is coiled at 600 ~ 610 ℃, the amount of MA component can be effectively reduced, the MA component size can be refined, and the yield strength and good ductility can be obtained.