连续退火工艺对低硅型冷轧低合金高强钢板力学性能的影响

利用多功能连续退火模拟器Multipas对屈服强度为380MPa的低硅型冷轧低合金高强钢板连续退火生产工艺进行了模拟,研究了在820,800,780℃三种不同退火温度和60,120,160m·min^-1三种不同退火速度下,连退工艺对冷轧低合金高强钢板组织、力学性能的影响.结果表明,在不同的退火温度、退火速度下钢板退火组织的晶粒度基本相同,采用较低的退火温度和较高的退火速度时,可获得较好的强化效果.同时指出,在较高的连续退火温度下,退火速度对力学性能的影响较为显著.

Effect of continuous annealing process on the mechanical properties of cold-rolled low silicon HSLA steel sheets

A multifunction continuous annealing simulator (Multipas) was employed to numerically simulate the continuous annealing process for a low silicon HSLA steel sheet of 380 MPa grade in yield strength. The effects of annealing process on the microstructure and mechanical properties of low silicon HSLA steel were studied at annealing temperatures of 820, 800, and 780℃; and annealing speeds of 60, 120, and 160 m·min^-1. The result indicates that the grain sizes of microstructure are similar at different annealing temperatures and different annealing speeds. The higher strength of low silicon HSLA steel can be gained when it is annealed at a lower annealing temperature and a higher annealing speed. The annealing speed affects the mechanical properties more significantly when the annealing temperature is in a higher level.