Abstract: Plane strain compression with the deformation of 30% of the 06Cr19Ni9NbN steel was carried out at the deformation temperature of 1100 ℃, the microstructure was observed, and the mechanical properties were tested. After compression, the solution treatment of the specimen was conducted at 1050 ℃ for 2 h. Meanwhile, the change of microstructure and mechanical properties was investigated. The results show that the greater the deformation of the area in the specimen is, the higher the degree of dynamic recrystallization is, the smaller the grain size is and the more uniform the microstructure is. After solution treatment, the small recrystallized grains gradually grow up and the microstructure becomes more uniform, and the grain size tends to be gradually stable after increasing to 100 μm. The solution treatment has little effect on the elongation of the steel, but the yield strength of the steel after solution treatment decreases about 20 MPa.

Key words: 06Cr19Ni9NbN steel, solution treatment, microstructure, mechanical properties