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URN etd-0903108-141522 Statistics This thesis had been viewed 3401 times. Download 2781 times. Author Yang-Yu Su Author's Email Address No Public. Department Materials Engineering Year 2007 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 57 Title Effect of CH4 Addition on the Plasma Nitrocarburized Layer of Stainless Steel Keyword resistivity Plasma nitrocarburizing Stainless steel S phase Active screen Active screen S phase Stainless steel Plasma nitrocarburizing resistivity Abstract Four kinds stainless steel designated AISI 316, 410, 430 and SAF 2205 were plasma nitrocarburized for investigation of their electrical resistance, microstructure and hardness distribution of the hardened layers.
Plasma nitrocarburizing at low temperature of 420°C with an active screen applied in the process produced a single phase nitrided layer of nitrogen and carbon expanded austenite (S phase) on the specimen surface, which considerably improved the resistivity property of AISI 316 austenitic stainless steel. According to the phase, γ’-Fe4N and ε-Fe2-3N, dominated in the nitcarburized layer, the resistivities of plasma nitrocarburized 410 and 430 specimens are higher than those of the substrate.
Advisor Committee Liu-Ho Chiu - advisor
Fan-Shing Chen - co-chair
Heng Cheng - co-chair
Files Date of Defense 2008-07-14 Date of Submission 2008-09-04