301L不锈钢的塑性变形特征研究

发布时间：2018-06-19 07:45

本文选题：L不锈钢 + 锻造态　；参考：《塑性工程学报》2017年04期

【摘要】：研究了不同压下率下(0%、9%、14%、22%和40%)301L不锈钢锻造态与固溶态的组织形变以及硬度变化特征。研究表明,锻造态奥氏体组织内存在孪晶,且晶粒较固溶态细小。固溶态301L不锈钢的硬度略低于锻造态,两者的硬度变化曲线与对应的加工硬化曲线具有相似性。经过塑性变形后两种状态下的301L不锈钢均出现了明显的加工硬化现象,随变形量的增加硬度不断提高,固溶态的加工硬化率更高,且比锻造态成形性更好,更有利于后续塑性加工;随着压下率的增加,α'马氏体不断增多,位错密度不断增高,晶粒不断碎化。
[Abstract]:The microstructure deformation and hardness change characteristics of forged and solid solution stainless steel at different reduction rates were studied in 22% and 40% and 301L stainless steel respectively. The results show that there are twins in the microstructure of wrought austenite and the grains are smaller than those in the solid solution state. The hardness of solid solution 301L stainless steel is slightly lower than that of forged stainless steel, and the hardness variation curves of the two kinds of stainless steel are similar to those of the corresponding work hardening curves. After plastic deformation, 301L stainless steel in both states appeared obvious work hardening phenomenon. With the increase of deformation amount, the hardness of the solution state was increased, and the workhardening rate of the solid solution state was higher than that of the forging state, and the workhardening rate was better than that of the forging state. With the increase of reduction rate, the 伪 'martensite increases, the dislocation density increases, and the grains are broken.
【作者单位】：西华大学材料科学与工程学院;
【基金】：四川省科技支撑项目(2015GZ0164,2016GZ0226,2016GZ0241) 西华大学创新基金项目(ycjj2016139) “西华杯”登峰计划项目(2016035)
【分类号】：TG142.71

【参考文献】