毫秒脈衝雷射預處理鎳基超合金HAYNES® 282®於750℃乾空氣中500小時氧化行為之研究

Study on the Oxidation Behavior of Millisecond Pulsed Laser Pretreated HAYNES® 282® in Dry Air at 750℃ for 500 hours

HAYNES® 282®為一種析出強化型的鎳基超合金，在高溫環境下具優異的機械性能與抗腐蝕性，成為先進超超臨界（A-USC）燃煤發電系統中的候選結構材料。先期研究發現經90瓦脈衝雷射預處理之HAYNES® 282®在750℃乾空氣環境中48小時內，氧化增重減少約69%，展現更加抗高溫氧化之性能。為探討此種抗氧化性能提升的長期效果，本研究利用箱型爐對經90瓦脈衝雷射預處理之HAYNES® 282®於750℃乾空氣環境中長達500小時的氧化實驗與增重行為分析，探討雷射處理後生成預氧化皮膜對長期氧化行為的影響，實驗結果顯示經雷射預處理而生成預氧化皮膜之試片，其質量增重顯著低於未處理樣品，本研究的結果有助於深入了解HAYNES® 282®經雷射脈衝加工後的長時間氧化行為和動力學，為先進發電技術高溫材料的開發提供突破的線索。

HAYNES® 282® is a precipitation-strengthened nickel-based superalloy characterized by superior high-temperature mechanical properties and corrosion resistance, proving it suitable for advanced ultra-supercritical (A-USC) coal-fired power plants. Prior research demonstrated that 90-watt pulsed laser-pretreated HAYNES® 282® diminished oxidation weight gain by approximately 69% after 48 hours at 750℃ in dry air, signifying enhanced oxidation resistance. This study evaluated long-term effects by performing oxidation tests on laser-treated specimens at 750 °C in dry air for 500 hours using a box furnace. The results indicated that laser-treated samples showed a markedly reduced mass gain compared to untreated samples. These findings improve understanding of the long-term oxidation kinetics of laser-processed HAYNES® 282® and promote the development of high-temperature materials for advanced power generation.