| The people' healthy consciousness rises along with the improved living quanlity. Due tothe wide fatal infection incidents happened in recent years, antibacterial stainless steels were developed and have met the raised public awareness of hygiene. They have found wide applications in food industry, hospitals, domestic appliances and public transportation and buildings, etc. Development of new type of antibacterial stainless steels with a combination of high properties and multi-functions is always the objection of many investigators. In this paper, microstructures and properties of copper-bearing ferrite and austenite stainless steels were studied, using experiments and theoretical analysis.Different amount of copper matrix elements can change the organization, incorporating stainless steel copper content of the grain size is tiny matrix elements of copper, mixed refine played the role. Stainless steel matrix organization morphology change with heat treatment mechanism, with no obvious changes in temperature, the limitation of grain slightly raise up trend.With low backscatter scanning electron microscopy observation of samples, through the sample after wang corrosion surface corrosion and corrosion is due to the concentration of copper corrosion is produced in the fall. A few microns in size pit corrosion, evenly distributed in samples of the surface.The composition and growth mechanism of copper based precipitates in copper-bearing ferrite antibacterial stainless steel was analyzed with HRTEM and carbon replica extraction techniques. Copper based precipitates mainly consist of cooper and small amount of manganese and iron elements.The precipitation process of copper based precipitates in copper-bearing ferrite antibacterial stainless steel was investigated. The results show that the precipitation of copper based precipitates in ferrite antibacterial stainless steel is controlled by diffusion mechanism. The optimum aging range is between 750 and 800℃. The larger the precipitates are, the more the quantity is, the higher the antibacterial property will be. To secure a good antibacterial property, the precipitation amount should surpass 0.5%.To sample antibacterial and corrosion study comes to the conclusion: contain copper sample sterilization rate of 2% is far less than that of copper, copper content when 3.5% 3.5% antibacterial effect when has reached standards, copper content than 3.5% antibacterial effect no major changes when; Different copper content of sample after 10h 5h and 20h 40h, after soaking and its quality, so that changes very little can contain copper and stainless steel in salt has quite high corrosion resistance.Considering the two aspects, corrosion resistance of 0Cr18Ni9Cu3 steel is good after tempering at 800℃, corrosion resistance of 0Cr18Ni9Cu4 are good after tempering at 650℃.Considering antibacterial properties, corrosion resistance of experimental steels,0Cr18Ni9Cu3 steel possesses optimum integrative properties after quenching at 1050℃×10min and tempering at 800℃×2h.
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