電漿滲氮之D2工具鋼經TRD處理後 之耐磨耗性研究

Wear resistance study on plasma nitrided D2 steel followed by TRD treatment

林俊佑(Jiun-You Lin)

指導教授 ： 陳繁雄

大同大學/工程學院/材料工程學系所/碩士(2005年)

摘要

本研究擬在預電漿氮化後之AISI D2工具鋼上進行熱反應沉積擴散處理以獲得高硬度之鉻-氮化物(Cr2N)被覆層。在不同處理條件下所生成之被覆層；其特性將以截面微觀組織、X-ray繞射、元素分佈、硬度及磨耗測試等分析方法檢驗之。
實驗結果證實經雙重處理(先電漿氮化再經熱反應沉積擴散處理)所得之被覆層由鉻-氮化物(Cr2N)及鉻-碳化物(Cr7C3)共組而成，經磨耗測試後發現儘管該被覆層在乾磨耗條件下具有相當高的摩擦係數；但是其耐磨耗性仍表現十分出色。

關鍵字

電漿氮化，熱反應沉積擴散製程，氮化鉻，碳化鉻

並列摘要

Hard coating of chromium nitride (Cr2N) fabricated by dual treatment consisted of pre-plasma nitriding followed by TRD treatment has been studied on D2 tool steel. The characterizations of the coated layers obtained from different conditions have been evaluated on their cross sectional microstructures, X-ray diffraction patterns, element distribution profiles, hardness and wear resistance.
The experiment results evidenced that the coated layers derived from the dual treatment were composed of chromium nitride, Cr2N, coexisted with chromium carbide, Cr7C3. And the wear test revealed that the friction coefficients of the coated layers were highly elevated under the dry abrasion condition although they performed the excellent wear resistance.

並列關鍵字

chromium carbide ； chromium nitride ； plasma nitriding ； TRD (Thermal Reactive Deposition/Diffusion proce

參考文獻

[1] Ghislaine Bertrand, Catherine Savall, Cathy Meunier, Propertied of reactively RF magnetron-sputtered chromium nitride coatings, Surface and Coating Technology, Vol. 96, (1997) 323-329.

[2] Peter C. Kig, Ray W. Reynoldson, Allan Brownrigg, John M. Long, Cr(N,C) diffusion coating formation on pre-nitrocarburised H13 tool steel, Surface and Coating Technology, Vol. 179, (2004) 18-26.

[3] B. Chicco, W. E. Borbidge, E. Summerville, Experimental study of carbide and carbonitride coatings, Material and Engineering, Vol. A226, (1999) p. 62-72.

[5] F. Ashrafizadeh, Influnence of plasma and gas nitriding on fatigue resistance of plain carbon (CK45) steel, Surface and coating technology, Vol. 173-174, (2003) p.1196-2000.

[6] Karl-Erik Thelnign, Steels and its heat treatment 2nd edition, (1984) p.93-94.