关键词: 0Cr13不锈钢, 磁性能, 力学性能, 热处理

Abstract: Effect of different recrystallization annealing process and quenching and tempering process on mechanical and magnetic properties of the 0Cr13 stainless steel at room temperature was studied. The results show that after quenching at 980 ℃ for 1 h, water-cooling, tempering at 725 ℃ for 2 h, water-cooling and tempering at 400 ℃ for 2 h, furnace-cooling, the 0Cr13 steel can obtain ferrite and martensite duplex microstructure, and the mechanical properties and magnetic properties are better matched. After quenching at 980 ℃ for 1 h, water-cooling, tempering at 725 ℃ for 2 h, water-cooling and tempering at 870 ℃ for 2 h, furnace-cooling, the 0Cr13 steel has excellent magnetic properties and smaller coercive force, but the strength decreases significantly. After recrystallization annealing at 820 ℃ for 5 h and furnace-cooling, the 0Cr13 steel obtains organic and uniform equiaxed ferrite microstructure, strength of which is lower than that after quenching and tempering, but has good soft magnetic properties. After quenching and tempering at 870 ℃, the coercive force H_c and residual magnetic induction B_r of the material can be significantly reduced, and the magnetic field can be rapidly demagnetized. In the 0Cr13 steel, the more the amount of ferrite is, the better the weak magnetic properties; and the higher the mass of martensite is, the higher the strength. There is a certain contradictory relationship between magnetic properties and strength, and better magnetic properties will lose a certain strength and vice versa.

Key words: 0Cr13 stainless steel, magnetic properties, mechanical properties, heat treatment