摘要
对SP2215奥氏体耐热钢分别进行室温压缩(变形量10%~50%)、拉伸(变形量10%~40%)和弯曲(弯曲角度20°~180°)变形试验,研究了室温变形后的显微组织、显微硬度和强度。结果表明:SP2215钢在室温变形过程中不发生马氏体相变,具有较高的奥氏体组织稳定性,位错滑移始终参与变形;室温变形可大幅度提高SP2215钢的加工硬化程度,从而提高抗拉强度和硬度,并成倍提高其屈服强度。
Compression(with 10%-50% deformation), tension(with 10%-40% deformation) and bending(with 20°-180° bending angle) deformation tests at room temperature were conducted on SP2215 heat resistant austenitic steel. The microstructure, microhardness and strength of the steel after room temperature deformation were studied. The results show that no martensitic transformation occurred in SP2215 steel during room temperature deformation. The steel had high austenite structure stability. Dislocation slips always took part in deformation. Room temperature deformation could greatly improve the work hardening of SP2215 steel, thereby increasing the tensile strength and hardness, and doubling the yield strength.
作者
宋利
SONG Li(Central South Electric Power Test and Research Institute,China Datang Group Science and Technology Research Institute Co.,Ltd.,Zhengzhou 450000,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2022年第7期64-69,75,共7页
Materials For Mechanical Engineering
关键词
奥氏体耐热钢
冷变形
马氏体相变
滑移
加工硬化
heat resistant austenitic steel
cold deformation
martensitic transformation
slip
work hardening
