Effect of Final Annealing Temperature on Antibacterial Precipitate of Copper-Bearing Ferritic Stainless Steel

Abstract:

In order to keep the steel with outstanding antibacterial characteristics, the relationship between the anneal temperatures and the amounts of the precipitated Cu-rich phase was investigated in this work. The SEM analysis of annealing specimens indicated that the microstructure changed with the increase of annealing temperature. At 900°C, the martensite phase appeared along the crystal boundary, but the amount of Cu-rich phase was almost no change. At 920°C, the sizes of the Cu-rich precipitates minished and the amounts of the precipitates reduced gradually. At 940°C, there was only martensite phase existing in the ferrite matrix. Therefore, the optimal final annealing temperature range was chosen from 880°C to 900°C to ensure attaining excellent antibacterial properties and favorable mechanical characteristic of copper-bearing stainless steel.

• Periodical: Materials Science Forum (Volumes 620-622)
• Pages: 213-216
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.620-622.213
• Online since: April 2009
• Authors: De Ning Zou, Yan Zhang, Ying Han, Wei Zhang
• Keywords: Antibacterial Precipitate Phase, Ferritic Stainless Steel (FSS), Final Annealing Temperature

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