蒸汽量对T91钢高温氧化动力学的影响  

Oxidation Dynamics of T91 Steel Under Different Steam Quantity

作　　者：翟芳婷[1] 

机构地区：[1]陕西工业职业技术学院,陕西咸阳712000

出　　处：《热加工工艺》2012年第4期11-13,共3页Hot Working Technology

基　　金：陕西省教育厅资助项目(05JK224)

摘　　要：利用热分析天平连续称重法对T91钢的高温蒸气氧化动力学进行研究。结果发现:不同蒸汽量时,T91钢在550～600℃的氧化动力学曲线的抛物线规律不变,腐蚀量的差异可忽略;650～680℃的氧化动力学曲线在氧化初期完全吻合,氧化进入慢速阶段后,蒸汽量大时曲线仍遵守抛物线规律,蒸汽量小到200 mL.h-1左右时遵守直线规律;750℃的慢速氧化阶段动力学曲线均为直线规律,此时氧化量随蒸汽量的增加而增加。另外,T91钢在空气中的抗氧化性比在蒸汽中的好。The thermal gravimetric analysis was used to research the oxidation kinetics of T91 steel in different steam quantity.The results show that first T91 steel always keeps parabolic oxidation kinetic laws below 600 ℃and the difference of mass gain is not sensitive to those;the oxidation kinetics curves have the same change at 650 ℃～680 ℃.The curves are still parabolic in enough steam quantity.On the contrary,these are straight lines after oxidation at 750 ℃,when the quantity of steam is less than 200 mL·h-1.The oxidation mass rises with the increase of steam quantity at 750 ℃.The oxidation resistance of T91 steel in air is better than that in steam.

关 键 词：T91钢 氧化动力学 蒸汽量 

分 类 号：TG142[一般工业技术—材料科学与工程]