High Strength Stainless Steel Material with Excellent Processability and Manufacturing Method Thereof

摘要

To provide a high-strength stainless steel material which suppresses a decrease in strength, improves workability, and further suppresses cost for a stainless steel material having a two-phase structure of a ferrite phase and a martensite phase.SOLUTION: In the present invention, C: 0.03 to 0.15%, Si: 0.1 to 2.0%, Mn: 0.1 to 4.0%, P: 0.04 % Or less, S: 0.03% or less, Ni: 0.01 to 4.0%, Cr: 10 to 20%, N: 0.12% or less, B: 0.003 to 0.01% , Ti: 0.05 to 0.2%, Al: 0.05 to 0.2%, V: 0.05 to 0.2%, the balance being Fe and unavoidable impurities , Which has a metallic structure of two phases of a ferrite phase and a martensite phase and satisfies the relation of max (%) calculated from the formula (1) to 50 or more and 85 or less, excellent processability It is a strength stainless steel material.(FIG.