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研究钢带运行速度对组织性能的影响对提高大型钢铁企业生产率具有重要意义,以相变诱导塑性钢TRIP 590为例,分别以80、100、120、140 m/min的速度进行冷轧退火试验,运用拉伸试验机、扫描电镜等物理检验设备,分析不同的钢板运行速度对组织和性能的影响规律。随着钢带运行速度的增加,成品铁素体体积分数逐渐减少,马氏体+贝氏体体积分数逐渐增加,晶粒尺寸逐渐增大,在100~120 m/min时,各相组织比例、晶粒尺寸及力学性能等综合指标有较理想数值。特别是速度为120 m/min时,残奥量及残奥中碳的质量分数较高,其组织性能达到最佳值,强塑积为21 GPa·%,这与TRIP效应能够同时提高强度及塑性指标相吻合。
It is of great importance to study the effect of strip running speed on the microstructure and properties in order to improve the productivity of large iron and steel enterprises. Taking the phase transition-induced plasticity steel TRIP 590 as an example, cold rolling and annealing tests are carried out at the speeds of 80, 100, 120 and 140 m / min , The use of tensile testing machine, scanning electron microscopy and other physical testing equipment, analysis of different steel plate speed and the impact of the law. With the increase of strip operating speed, the volume fraction of finished ferrite decreased, the volume fraction of martensite + bainite gradually increased, and the grain size gradually increased. At the time of 100-120 m / min, the proportion of each phase , Grain size and mechanical properties such as a comprehensive index has a more ideal value. Especially at the speed of 120 m / min, the mass fraction of Paralympic and Paralympic carbon is higher, and its microstructure performance reaches the best value, with a strong plastic product of 21 GPa ·%. This is in line with the TRIP effect, which can improve the strength and Plastic indicators match.