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銅含量對沃斯田鐵系不銹鋼高溫機械性質影響之研究

The Effect of Copper Contents on The Hot Mechanical Properties in Austenitic Stainless Steels

摘要


銅為沃斯田鐵穩定元素,會增加不銹鋼之疊差能(Stacking fault energy)。故於鋼中添加銅可增加其成形性、強度及延性。當銅的添加量超過3%時,會有明顯析出強化的效果。但添加過量於熱軋過程中易造成軋延裂痕。本研究採用Gleeble 2000高溫拉伸試驗機進行不銹鋼材料之高溫機械性質測試。結果顯示:(1)在1000°C時會發生高溫脆性的現象;(2)而不論是沿著平行軋延方向或垂直軋延方向,其最佳熱加工溫度皆為1100°C以上。

並列摘要


Copper is the austenite stablizer in austenitic stainless steel, that increases Stacking fault energy (SFE). The copper-containing austenitic stainless steels a higher degree of formability, strength and ductility. The phenomena of precipitation hardening is obvious when copper content gets over 3%. When the copper content is over 3% roll cracking is prone to occur during the hot rolling process. A Gleeble 2000 hot tensile test machine was used to conduct the hot tensile tests. The test results revealed that (1) the embrittlement region occurs at 1000°C. and (2) in both parallel and vertical press direction, the most suitable hot working temperature of austenitic stainless steels should be above 1100°C.

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