添加金屬銅對SUS 304不銹鋼顯微組織及抗菌性質影響

Microstructure and Antibacterial Properties of Cu-modified SUS 304 Stainless Steel

鄭至軒(Jr-Shiuan Jeng)

指導教授 ： 唐自標

國立臺北科技大學/工程學院/材料及資源工程系研究所/碩士(2011年)

摘要

本實驗研究沃斯田鐵系不銹鋼中，不同銅含量經過固溶處理與時效處理後與硬度、顯微組織、抗菌特性與耐蝕性之影響。實驗中採用SUS 304不銹鋼添加適量之金屬銅經熔煉後進行機械加工，施以均質化固溶後再以時效處理讓銅元素以ε-Cu型態析出於不銹鋼表皮，以進行各項試驗以及抗菌試驗。含銅不銹鋼經鑄造之後，殘留部份凝固過程所形成之δ-肥粒鐵，使在鑄造狀態下巨觀觀察之顯微組織主要由析出δ-肥粒鐵與沃斯田鐵基地相所組成。含銅沃斯田鐵系抗菌不銹鋼經過固溶處理與時效處理後，基地相中會析出ε-Cu相，使硬度因固溶強化與析出硬化而隨銅添加量上昇。含銅沃斯田鐵系抗菌不銹鋼經固溶處理與時效處理後，基地相中會析出ε-Cu相， 無論添加2 wt.％銅或4 wt.％銅在經歷24小時抗菌試驗後均能達到滅菌率90%以上之抗菌效果。而在極化腐蝕實驗方面，基地相中析出的ε-Cu相破壞鈍態氧化薄膜之連續性與緻密性導致耐蝕性降低，且隨著析出ε-Cu量的增加，沃斯田鐵系抗菌不銹鋼之耐蝕性有持續惡化之趨勢。

關鍵字

SUS 304不銹鋼 ； 菌性質 ； ε-Cu相

並列摘要

The current study investigates the effects of different copper content after solid-solution treatment and aging treatment with hardness, microstructure, antibacterial property ,and proties of corrosion resistance. SUS 304 stainless steel is melted by adding 2-6 wt.% copper before machining , solid-solution treatment,and aging treatment. δ-ferrite forms during solidification and cause the casting of the microstructure observed mainly by the precipitation of δ-ferrite and austenite. Cu-modified SUS 304 stainless steel after solid-solution treatment and aging treatment, the base phase will precipitate the ε-Cu phase, the hardness due to solid-solution strengthening and precipitation hardening and increased with the amount of copper added. Cu-modified SUS 304 stainless steel after solid-solution treatment and aging treatment, the base phase will precipitate the ε-Cu phase, whether adding 2 wt.% Cu or 4 wt.% Cu through 24 hours of antibacterial tests were able achieve very well antibacterial rate. In the electrochemical experiments, the corrosion resistance of SUS 304 stainless steel deteriorates with amount of ε-Cu increase. It is observed that precipitation of ε-Cu has adverse effects on the corrosion resistance of SUS 304 stainless steel.

並列關鍵字

SUS 304 stainless steel ； antibacterial property ； ε-Cu phase

參考文獻

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