| 3wt%Cu and 1.1wt%Mo are added into 1Cr13 stainless steel by remelting. The effects of heat-treatment on antibacterial properties, corrosion resistance and mechanical properties are studied. Microstructure and fracture appearance of 1Cr13Cu3 and 1Cr13Cu3Mo are observed through SEM and XRD.The results show that Cu contained stainless steel possesses optimum antibacterial property after special antibacterial treatment. The antibacterial ratios of 1Cr13Cu3 and 1Cr13Cu3Mo steels are about 100% after tempering at 350℃~600℃for 2~4h.ε-Cu phases precipitating dispersedly by antibacterial treatment contact with bacteria liquid and strip Cu ions of certain concentration, which have antibacterial function. Adding Cu and Mo can also affect corrosion resistance and mechanical properties of stainless steel. After tempering, precipitated phases distributing dispersedly lead to precipitating hardening and strengthening .The hardness of 1Cr13Cu3 steel reaches a peak after tempering at 500℃and hardness of 1Cr13Cu3Mo steel reaches a peak after tempering at 450℃, because precipitated phases block dislocation movement and lead to hardening and strengthening. As for corrosion resistance, passivative current density and passivation range of experimental steels are related to tempering temperature. Considering the two aspects, corrosion resistance of 1Cr13 steel is good after tempering at 350℃, corrosion resistance of 1Cr13Cu3 and 1Cr13Cu3Mo are good after tempering at 450℃.Considering antibacterial properties, corrosion resistance and mechanical properties of experimental steels, 1Cr13Cu3Mo steel possesses optimum integrative properties after quenching at 1050℃×20min and tempering at 450℃×2h .
|
PDF Full Text Request