Effect Of Rare-Earth Ce On The Corrosion Resistance And Antibacterial Property Of2Cr13Stainless Steel

As a kind of martensite stainless steels,2Cr13stainless steel has goodcomprehensive properties, so it has been widely used in many fields, such as the pumpin the marine environment, axle and pull rod of steam equipment, medical devices andfamily tableware, etc. In order to meet all technical functions as required, it graduallybecomes a kind of important method to add other alloying elements in stainless steel toimprove the comprehensive properties of the steel. Rare earth elements have thefunction of purifying quality of steel, improving the inclusions, micro-alloying,improving the properties of cast steel and they have good antibacterial properties,belong to low toxic substances，so the application of rare earth elements in stainlesssteel are more and more widely.2Cr13stainless steel was the research object in this study, the rare earth elementCe with wide applications was added in the2Cr13steel. In order to get the appropriateresidue amount of Ce, Fe-Ce intermediate alloy rather than pure Ce was added in the2Cr13stainless steel in smelting, then the steel was forged and heat treated in this study.The effects of rare earth Ce on the microstructure, mechanical properties, corrosionresistance and antibiotic property of the2Cr13stainless steel were researched in theexperiment, at last the action mechanism of Ce in the2Cr13stainless steel wasanalysised.The results show that the method of adding Fe-Ce intermediate alloys in2Cr13stainlesssteel can make the rare earth Ce yield reach over35%.The position of phase regions in phasediagram of Fe-Fe3C can be influenced when dding rare earth Ce in the2Cr13stainless steel,Ce also can effectively reduce the carbide segregation and precipitation in2Cr13steel, Cemainly exists in the matrix in the form of compounds. The hardness and the tensileproperties of the2Cr13stainless steel are both reduced at room temperature, when thecontent of Ce is more than0.28%. The corrosion resistance of2Cr13Ce stainless steel isbetter than the property of the2Cr13stainless steel, but the content of Ce is not themore the better. In this experiment, when the Ce content is0.28%, the corrosionresistant of2Cr13stainless steel is the best. The2Cr13stainless steel has long-lastingantibacterial property when Ce is contained in the steel, and the content of Ce hassomething to do with antibacterial property of2Cr13stainless steel, when the content of Ceis0.28%,2Cr13stainless steel has good antibacterial property, if continue to increase the content of Ce to1.39%, it has little influence on the antibacterial property, but theperformance of microstructure, mechanical property and corrosion resistance will bedegraded. In the range of the experiment, in order to get the good comprehensiveperformances, the best percentage of rare earth Ce is0.28%in2Cr13stainless steel.