AISI H13工具鋼廣泛地應用於擠型與壓鑄之熱作模具上,其特性具有高強度、高延展性、耐回火性佳及適中的成本費用。研究中,我們利用各種不同表面處理,包括氮氧化、TiAlN鍍層與氮氧化/TiAlN複合複合處理於AISI H13工具鋼上,嘗試利用不同表面處理來增加工具鋼之使用壽命。為了評估複合表面處理對A390熔融鋁合金之熱熔損及耐磨耗性之影響,本實驗利用OM、SEM及EDS顯微組織觀察,以及熱熔損和磨耗試驗等測試加以評估。實驗結果顯示利用氮氧化/TiAlN表面複合處理具有最高之表面硬度值(Hv0.01 3463),此結果直接影響其磨耗性質,即表面硬度越高其磨耗量越少(0.05 mm^3)。此外,具有高硬度及高溫穩定性的氮氧化/TiAlN複合鍍層,在鋁熔損試驗的結果中,其改善抗熔損之效果最顯著。
AISI H13 tool steels are often used in extrusion and die-casting dies. They have high strength, ductility, good tempering resistance, and modest cost. In this study, we conducted a series of tests treating the specimens with oxynitriding, TiAlN coating, and oxynitriding/TiAlN complex coating. OM, SEM and EDS microstructure inspections, erosion and wear tests were performed on the treated specimens to determine the molten loss for melting A390 aluminum alloy and wear resistance. The experimental results showed that the oxynitriding/TiAlN complex coating had the highest surface hardness (Hv0.01 3463) and a lower wear volume (0.05 mm^3). The higher hardness and better thermal stability of the oxynitride/TiAlN complex layer contributed to its effective erosion resistance.