有色金属材料与工程2026，Vol.47Issue(1)：17-26,10.DOI:10.13258/j.cnki.nmme.20250406001
等通道挤压和时效处理对1RK91不锈钢力学性能的影响
Effects of equal channel angular pressing and aging on the mechanical properties of 1RK91 stainless steel
摘要
Abstract
Metallographic observation,X-ray diffractometer(XRD)phase analysis,tensile test and hardness measurement were carried out on 1RK91 stainless steel specimens subjected to different passes of equal channel angular pressing(ECAP)and aging treatment.The results showed that strain-induced martensitic transformation occurred in 1RK91 stainless steel during ECAP,which was closely related to the diffusion and migration of dislocations.After 5 passes of ECAP treatment,the yield strength of the specimens increased from the initial 373 MPa to 478 MPa,and the dislocation density increased from 4.10×1010 cm−2 to 7.98×1010 cm−2.After aging treatment at 500℃for 2 h,the peak Vickers hardness of the specimens increased to 395.When aged at 450℃for 30 min followed by aging at 500℃for 90 min,the specimens exhibited a higher peak Vickers hardness of 429.The specimens treated with 5 passes of ECAP achieved the maximum self-corrosion potential of −0.324 V and a self-corrosion current density of 0.445×10−6 A/cm2,indicating improved corrosion resistance.关键词
1RK91不锈钢/等通道挤压/应变诱发马氏体/时效处理Key words
1RK91 stainless steel/equal channel angular pressing/strain-induced martensite/aging treatment分类
医药卫生引用本文复制引用
陈义楠,何代华,祁胜财,张柯,陈小红,马凤仓..等通道挤压和时效处理对1RK91不锈钢力学性能的影响[J].有色金属材料与工程,2026,47(1):17-26,10.基金项目
国家自然科学基金资助项目(51771119) （51771119）
上海自然科学基金资助项目(17ZR1419600)和上海高校医疗器械材料工程技术研究中心资助项目(20DZ2255500) （17ZR1419600）
