Study on Cold Rolling Process of 00Cr21Mn5Ni1.5N Duplex Stainless Steel

The effects of cold rolling process with different deformation on the microstructure and mechanical properties of 00Cr21Mn5Ni1.5N duplex stainless steel were studied by OM, SEM, ferrite measuring instrument, Vickers hardness tester and universal testing machine.The results show that the microstructure of the hot rolled 00Cr21Mn5Ni1.5N steel is ferrite and austenite. With the increase of deformation amount, the microstructure of the two phases is elongated along the direction of cold rolling deformation, and more and more austenite phases in the microstructure are transformed to deformed induced martensite. When the cold rolling deformation amount reaches 55%, the austenite in 00Cr21Mn5Ni1.5N steel is basically transformed to deformed martensite. With the increase of cold rolling deformation, the hardness and tensile strength of 00Cr21Mn5Ni1.5N steel increase continuously, while the plasticity decreases continuously, and the strong plastic product first increases then decreases.In cold rolled 00Cr21Mn5Ni1.5N steel, the test steel with 20% cold rolled deformation has the best strong plastic product, which is 15713.2 MPa·%.