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采用多功能退火模拟器,按照首钢1号CGL(连续镀锌生产线)配置研究了带速、加热温度及快冷终止温度对590MPa级热镀锌双相钢力学性能的影响。研究结果表明,提高带速可以提高冷却速度和减少带钢在均衡段停留时间,有利于保证双相钢的性能。要获得良好性能的双相钢,大于90m/min的带速是必要的。加热温度过低会导致双相钢强度不足,过高则会导致伸长率和硬化指数降低。800℃的加热温度可以获得较好的双相钢综合力学性能。快冷终止温度升高,双相钢的抗拉强度和加工硬化指数都显著降低。在均衡段电加热有能力保证镀锌温度的情况下,降低快冷终止温度有利于获得良好的双相钢力学性能。
The effect of belt speed, heating temperature and quench termination temperature on the mechanical properties of 590MPa hot-dip galvanized dual-phase steel was studied with a multi-functional annealing simulator according to the configuration of Shougang No. 1 CGL (continuous galvanizing production line). The results show that increasing the belt speed can improve the cooling rate and reduce the strip stay time in the equilibrium section, which helps to ensure the performance of the dual phase steel. To obtain good performance of dual-phase steel, belt speed greater than 90m / min is necessary. Heating temperature is too low will lead to insufficient strength of duplex steel, too high will lead to lower elongation and hardening index. The heating temperature of 800 ℃ can get a better dual-phase steel mechanical properties. Rapid quench termination temperature, dual-phase steel tensile strength and work hardening index are significantly reduced. In the equalization section of the electric heating ability to ensure that the case of zinc plating, to reduce the rapid cooling termination temperature is conducive to obtaining good mechanical properties of dual phase steel.