Effect of Cold-rolling Deformation on Microstructure and Mechanical Properties of Fe-11Cr-5Al-2Mo Alloy

The purpose of the study is to understand the cold deformation rule of Fe-11Cr-5Al-2Mo alloy, so as to provide data and theoretical basis for the cladding tube manufacturing. The rolling experiments of Fe-11Cr-5Al-2Mo alloy plates with different cold-rolled deformation were carried out. The cold-rolled plates were annealed at 800℃ for 1 h, and the microstructure evolution of the cold-rolled plates and annealed plates was characterized. The strength and plasticity of Fe-11Cr-5Al-2Mo alloy were evaluated by the tensile test at room temperature. The deformed microstructure of Fe-11Cr-5Al-2Mo alloy plate is elongated with the increase of cold rolling deformation, and the strength of the plate increases with the increase of cold rolling deformation. After annealing at 800℃ for 1h, the plate with 50% cold rolling deformation showed the smallest and uniform recrystallization microstructure, and had a good ductile-plastic fit. In this paper, the relationship between cold rolling deformation, microstructure and properties of the alloy is expounded, which provides a reference for the design of cold rolling deformation and the study of annealing process of Fe-11Cr-5Al-2Mo alloy tube.