後氧化處理對AISI H13工具鋼之熱熔損與腐蝕行為研究

Study the Thermal Loss and Corrosive Behavior on AISI H13 Tool Steel Via Post-oxidizing Treatment

陳以欽(Yi-Chin Chen)

指導教授 ： 唐自標

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2009年)

https://doi.org/10.6841/NTUT.2009.00520

摘要

在不改變鋁湯成分以及模具材質之下，為了有效改善模具鋁湯熔損情形，並且兼顧成本及便利性的要求，本研究採用不同表面處理的方式來改善模具鋁湯熔損問題，增加模具使用壽命，比較無處理、氧化處理、氮化處理及氮化後氧化處理的試棒經過熔損試驗後的各項觀察。經由實驗結果發現，氮化層確實能夠保護AISI H13鋼材，有效延遲鋁湯熔損的時間。而在4小時熔損後，氮化後氧化580℃ 3小時、氮化後氧化600℃ 2小時及氮化後氧化600℃ 3小時的試棒，因為具有較厚的氧化層，所以其熔損率計算結果為0%，抗鋁湯熔損能力為最佳。經由腐蝕分析證實，氧化層能夠提昇工具鋼表面抗腐蝕性質，快速地在工具鋼表面形成鈍化層，有助於抵抗外在環境的腐蝕現象。綜合各項分析結果，得知抗鋁湯熔損能力和腐蝕性質以氮化後氧化處理最佳，氧化處理次之，其次為氮化處理，無處理最差。

關鍵字

熱熔損 ； 氮化後氧化 ； AISI H13工具鋼 ； 腐蝕

並列摘要

In order to effectively improve the aluminum melting loss of mold, this study uses the ways of different surface treatments to improve the aluminum thermal loss of the mold and increase the tool life. We Compare the moldings without treatment, with oxidizing treatment, nitriding treatment, and oxynitriding treatment. The experimental results show that the nitrided layer effectively delays the time of melt loss and is indeed able to protect AISI H13 steel. Due to the increased thickness of oxided layer, that result in the melting loss rate was 0% for oxynitriding at 580℃ for 3 hours, 600℃ for 2 hours and 600℃ for 3 hours after 4-hour aluminum melting test. The experimental results also show that the oxidized layer can enhance the surface corrosion resistance of tool steel. The passivation layer was rapidly formed on the surface of steel. Therefore, it exhibits the best corrosion resistance capability. In summary, oxynitride treatment has the best anti-aluminum melting and corrosion resistance capability, followed by oxidizing and nitriding treatments, and non-treatment sample shows the worst results.

並列關鍵字

Thermal loss ； Oxynitride ； AISI H13 tool steel ； Corrosion

參考文獻

[29] 蔡居正、李明彥、陳永傳，「以氧氣感測器控制氣體滲氮之可行性研究」，材料科學與工程，第3卷，第34期，2002，第173-178頁。

[1] Koji Yatsushiro, Masahiko Hihara, Katsuhiro Tagawa and Makoto Kuramoto, "Effects of Thermal Fatigue on Nitriding Hot Working Die Steel (H13)," ICDD,

[2] Anders Persson, Jens Bergström, Christer Burman and Sture Hogmark, " Influence of deposition temperature and time during PVD coating of CrN on corrosive wear in liquid aluminium," Surface and Coatings Technology, vol.

[7] C. Mitterer, F. Holler, F. Ü stel, D. Heim "Application of hard coatings in aluminium die casting─soldering, erosion and thermal fatigue behaviour,"

[10] Nurşen Saklakŏglu, "Characterization of surface mechanical properties of H13 steel implanted by plasma immersion ion implantation," Journal of Materials