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研究了0Cr13铁素体不锈钢经等径转角挤压(ECAP)变形和退火处理后的微观组织和力学性能。金相观察表明,变形态0Cr13钢经650～800℃退火1h后,内部形成平均晶粒尺寸为10μm左右的再结晶组织。同时,力学性能测试表明,退火温度对变形态0Cr13钢的力学性能影响显著,随退火温度由650℃升高到800℃,再结晶组织的发展导致对应的强度、硬度下降,而塑性则逐渐改善。结果表明,优选的ECAP变形+700℃×1 h退火工艺,可使实验钢获得最佳的强度-塑性配比。
The microstructure and mechanical properties of 0Cr13 ferritic stainless steel after ECAP deformation and annealing were investigated. Metallographic observation showed that the deformed 0Cr13 steel annealed at 650 ~ 800 ℃ for 1h, the recrystallized structure with the average grain size of about 10μm was formed inside. At the same time, the mechanical properties tests show that the annealing temperature has a significant effect on the mechanical properties of the 0Cr13 steel. As the annealing temperature increases from 650 ℃ to 800 ℃, the recrystallization structure leads to the decrease of strength and hardness, while the plasticity gradually improves . The results show that the optimum ECAP deformation + 700 ℃ × 1 h annealing process, the experimental steel can get the best strength - plastic ratio.