Effect of aging on antibacterial performance of Cu-bearing martensitic stainless steel

摘要

A preliminary study was made on the antibacterial performance and hardness of a type 420 Cu-bearing martensitic stainless steel (420-Cu) by antibacterial test, Vickers hardness measurement and TEM observation. The results showed that with increase of the aging temperature, the antibacterial performance of the 420-Cu steel was improved, but the hardness declined quickly. With prolonging the aging time at 500°C, both antibacterial rate and hardness increased. Combining the results of antibacterial test and hardness measurement, an optimal aging treatment for the 420-Cu steel was proposed.