The Study On Microstructure And Mechanical Property Of316Austenitic Stainless Steel With Increasing Nitrogen And Reducing Nickel

316stainless steel belongs to the18-8series austenitic stainless steel. It is widelyused in medical supplies, aviation, chemical industry and marine areas because it hasexcellent corrosion resistance and mechanical properties. With the development ofstainless steel industry, the high cost and lack of nickel resources became the bottleneck.It is necessary to find a new element instead of the expensive nickel element in316austenitic stainless steel, which is the main direction of industrial production under theprecondition of ensuring performance unchanged and reducing the cost.The test steels smelt are based on316austenitic stainless steel (07cr17ni12mo2) byusing vacuum induction furnace nitrogen blowing under a atmospheric pressure,secondary cloth to put nitride alloy and reducing the content of nickel in this paper. Theinfluence of increasing nitrogen and reducing nickel on microstructure, inclusion,precipitation of316stainless steel was investigated by Optical Microscope (OM),Scanning Electron Microscope (SEM) and Transmission Electron Microscopy (TEM).The influence of increasing nitrogen and reducing nickel on hot deformation behaviorwas obtained by analyzing the true strain-stress curve, microstructure, thermaldeformation activation energy via the single-pass compression tests on a Gleeble-1500Dthermomechanical simulator. The influence of increasing nitrogen and reducing nickel onroom-temperature mechanical property was studied by using SANS-ZBC2752A impacttesting machine and WDW–300tensile testing machine..The test steels are still the single austenitic organization, the amount of precipitationon grain boundary decreases, fall by an average of24.8%、37.5%、45.1%reduction ofarea and the tensile strength increases57.15%、42.5%、67.45%under high temperature;the flow strain-stress curves are the type of dynamic recrystallization and the nominalactivation energy of dynamic recrystallization increases from420.26kJ·mol-1to514.28kJ·mol-1、473.7kJ·mol-1; rockwell hardness value increases by30%, the roomtemperature impact energy increases from260.6J to294.3J, growth rate reached 12.94%; the room temperature elongation and shrinkage show little change, tensilestrength increases from829.24MPa to1221.67MPa, growth rate reached47.32%, andyield strength increase from85.06MPa to878.57MPa, growth rate reached50.17%afterreducing nickel and increasing nitrogen. It’s better for the composition design of resourceconservation of high nitrogen stainless steel, providing theoretical basis for themachining process by controlling the organization and performance through the aboveexperiment and result.