Hot Deformation Behavior of 1Cr12Ni3Mo2VN Martensitic Stainless Steel

2nd International Conference on Materials Science, Energy Technology and Environmental Engineering

材料科学;能源学;生态环境科学

He, Xiaomao^1 ; Jiang, Peng^1 ; Zhou, Leyu^1 ; Chen, Chao^2 ; Deng, Xiaochun^2

Beijing Research Institute of Mechanical and Electrical Technology, China^1

Tianqian Heavy Industry Company, Ltd, China^2

关键词: Arrhenius equation;    Correlation coefficient;    Deformation behavior;    Hot deformation behaviors;    Last stage blades;    Plastic deformation mechanisms;    Thermal compressions;    Thermal simulators;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/81/1/012031/pdf
DOI  :  10.1088/1755-1315/81/1/012031

来源: IOP

【 摘 要 】

1Cr12Ni3Mo2VN is a new type of martensitic stainless steel for the last-stage blades of large-capacity nuclear and thermal power turbines. The deformation behavior of this steel was studied by thermal compression experiments that performed on a Gleeble-3500 thermal simulator at a temperature range of 850°C to 1200°C and a strain rate of 0.01s-1 to 20s-1. When the deformation was performed at high temperature and low strain rate, a necklace type of microstructures was observed, the plastic deformation mechanism is grain boundary slip and migration, when at low temperature and lower strain rate, the slip bands were observed, the mechanism is intracrystalline slips, and when at strain rate of 20s-1, twins were observed, the mechanism are slips and twins. The Arrhenius equation was applied to describe the constitutive equation of the flow stress. The accuracy of the equation was verified by using the experimental data and the correlation coefficient R2 = 0.9786, and the equation can provide reasonable data for the design and numerical simulation of the forging process.