鐵基形狀記憶合金離子氮化之研究

A Study on the Ion-Nitriding of Fe-based Shape Memory Alloys

林昆明(K.M. Lin) ； 林新智(H.C. Lin) ； 陳彥伸(Y.S. Chen) ； 廖文銘(W.M. Liao)

《真空科技》 16卷3期 (2003/01) Pp. 33-41

https://doi.org/10.29808/JVSROC.200301.0006

摘要

應用真空感應熔煉法配製Fe64Mn30Si6和Fe59Mn30Si6Cr5二種合金，進行離子氮化之表面改質，以分析氮化層（化合物層與擴散層）的組成及成因，並探討溫度與氮氫比對氮化層之影響。實驗結果顯示，鐵基記憶合金之氮化層厚度遠低於一般鋼材或其他鐵基合金，原因在於Mn與N形成緻密之錳氮化物Mn4N，阻礙了N原子向內擴散所致。在相同條件下，Fe59Mn30Si6Cr5之氮化效果明顯較Fe64Mn30Si6合金為佳。此外，改變溫度及氮氫比等氮化參數可有效控制氮化層之成分與厚度。

關鍵字

鐵基形狀記憶合金 ； 離子氮化

並列摘要

Both Fe64Mn30Si6 and Fe59Mn30Si6Cr5 shape memory alloys are prepared by VIM technique. The ion nitriding of the alloys is carried out to investigate the effects of temperature and H2/N2 ratio on the related properties. Experimental results show that because of the formation of the intensive Mn4N the nitrided layer of Fe-based shape memory alloys is thinner than other Fe-based alloys. Fe59Mn30Si6Cr5 is ion-nitrided more effectively than Fe64Mn30Si6 due to the presence of Cr. The thickness and composition of the nitrided layer can be controlled by changing ion-nitriding parameters.

並列關鍵字

Fe-based shape memory alloy ； ion-nitriding