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通过模拟退火试验研究了气冷连续退火工艺对冷轧双相钢板组织和力学性能的影响。结果表明,随均热温度升高,钢板强度首先大幅下降,之后逐渐上升到最高点,然后又有所下降,退火温度应保证均热时得到一定数量的奥氏体,但对于喷气冷却的快速冷却工艺,过高温度产生过多的奥氏体降低了淬透性,不利于钢板力学性能;均热后适当的缓冷可以析出新生铁素体,这有利于双相钢板的塑性。
Simulated annealing experiments were carried out to study the effect of air-cooled continuous annealing process on the microstructure and mechanical properties of cold-rolled duplex steel. The results show that with the increase of soaking temperature, the strength of the steel sheet firstly decreases sharply and then increases gradually to the highest point, and then decreases again. The annealing temperature should ensure a certain amount of austenite when soaking, but for the rapid cooling of the jet Cooling process, excessive temperature generated austenite reduces the hardenability, is not conducive to the mechanical properties of steel; after soaking appropriate slow cooling precipitation of fresh ferrite, which is conducive to ductile plasticity.