AISI H13工具鋼氮氧化/TiAlN多重表面處理後熱熔損、腐蝕及磨耗性質之研究

Study on the Thermal Erosion, Corrosion and Wear Behaviors of AISI H13 Tool Steel after Oxynitriding/TiAlN Duplex Surface Treatments

林郁凱(Yu-Kai Lin)

指導教授 ： 張世賢

國立臺北科技大學/工程學院/材料科學與工程研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00550

摘要

AISI H13工具鋼廣泛地應用於擠型與壓鑄模具上，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。熱疲勞和侵蝕對熱作工具鋼是最重要的影響壽命和造成工具鋼損壞的因素，表面處理常常用來作為耐磨耗和改善耐腐蝕的方法。氮氧化製程是在氮化完成的最後階段利用空氣或水蒸氣處理，其利用水蒸氣為介質是一個整體性的重要步驟；此外，以陰極電弧物理氣相沉積法生成的氮化鋁鈦鍍層具有高硬度和高度熱穩定性，因此，我們利用氮氧化/氮化鋁鈦複合處理於AISI H13工具鋼上，嘗試利用此法來增加工具鋼之使用壽命。
本研究中，AISI H13試片嘗試施以不同的表面處理，包括氮氧化、氮化鋁鈦鍍層以及氮氧化/氮化鋁鈦表面複合處理等。同時，為了評估不同表面處理對A390熔融鋁合金之熱熔損，耐磨耗性及耐腐蝕性，實驗中利用XRD、SEM及OM顯微組織觀察，以及熱熔損、磨耗和腐蝕等測試加以評估。
實驗結果顯示利用氮氧化/氮化鋁鈦表面複合處理後，可得到0.03-0.04 mm的氮氧化層及3-4μm的TiAlN薄膜；同時，此複合鍍層具有最高之硬度值(Hv0.01 3463)，此結果並直接影響其磨耗性質，即表面硬度越高磨耗量越少(0.05 mm3)。此外，具有高硬度及高溫穩定性的氮氧化/氮化鋁鈦複合鍍層，在鋁熔損試驗的結果中，其改善抗熔損效果最顯著。腐蝕試驗的結果亦顯示此複合鍍層分別在0.15 M HCl及3.5 wt% NaCl的腐蝕溶液中，分別具有最佳的腐蝕電流9.644 × 10-5和4.4169 × 10-6安培，顯示具有最佳之抗腐蝕能力。

關鍵字

AISI H13工具鋼 ； 氮氧化/氮化鋁鈦表面複合處理 ； 熔損 ； 磨耗 ； 腐蝕

並列摘要

AISI H13 tool steels are almost exclusively used on extrusion and die-casting dies. They are characterized by high strength, ductility, good tempering resistance, and moderate cost. Thermal fatigue and erosion are the most important factors limiting tool life and resulting in the tool failure of hot work tool steels. A surface treatment is usually used to increase wear resistance as well as to improve corrosion resistance. The oxynitriding process uses air or steam at the end of the nitriding stage; used as an oxidizing medium, it is an integral part of the treatment. In addition, the TiAlN coating has high strength and thermally stable properties resulting from the cathodic arc PVD treatment; therefore, the oxynitriding/TiAlN duplex is used to treat AISI H13 tool steel in an attempt to increase tool life.
In this study, the specimens were subjected to various surface treatments including oxynitriding, TiAlN coating, and oxynitriding/TiAlN duplex treatments. In order to investigate the molten loss for melting A390 aluminum alloy, wear resistance and corrosion resistance for different surface treatments were examined. XRD, SEM and OM microstructural inspections, erosion, wear and corrosion tests were performed.
The experimental results indicated that a 0.03-0.04 mm oxynitride layer and a 3-4μm TiAlN thin film could be obtained after the oxynitride/TiAlN complex treatment. This duplex treatment had the highest surface hardness (Hv0.01 3463); thus, the wear behavior results showed both higher hardness and a lower wear volume (0.05 mm3). Moreover, the higher hardness and high thermally stable properties of the oxynitride/TiAlN duplex layer were found to have the most effective erosion resistance. The corrosion test results also showed the duplex layer to have the optimum corrosion currents of 9.64 × 10-5 and 4.42 × 10-6 A in 0.15 M HCl and 3.5 wt% NaCl solutions, respectively, signifying that the complex treatment resulted in the best corrosion resistance.

並列關鍵字

AISI H13 Tool Steels ； Oxynitriding/TiAlN Duplex Treatment ； Erosion ； Wear ； Corrosion

參考文獻

[1] 陳以欽，後氧化處理對AISI H13工具鋼之熱熔損與腐蝕行為之研究，碩士，台北科技大學，臺北，2009。

[5] H.A. Wriedt, N.A. Gokcen, and R.H. Nafziger, "Alloy Phase Diagrams," ASM International, vol.03 , 1992 , pp. 841.

[11] A. Alsaran, "Effect of Post-Oxidizing on Tribological and Corrosion Behavior of Plasma Nitrided AISI 5140 Steel," Surface and Coatings Technology, vol.176 , 2004,pp. 344-348.

[18] O. Knotek, and T. Leyendecker, "On the Structure of (Ti, Al)N PVD Coatings, " Solid State Chemistry , vol.70 , 1987, pp.318-322.

[19] L. A. Donohue, I. J. Smith, W. D. Munz, I. Petrov and J. E. Greene, "Microstructure and Oxidation-Resistance of Ti1-x-y-zAlxCryYzN Layers Grown by Combined Steered-Arc/Unbalanced-Magnetron-Sputter Deposition," Surface and Coatings Technology, vol.94-95, 1997,pp. 226-231.