摘要
研究了300M钢在700~1200℃高温下的氧化行为,利用扫描电镜(SEM)和X射线衍射仪等手段观察分析了氧化层的表面形貌、微观组织结构成分,并结合氧化动力学曲线,分析了300M钢在700~1200℃高温氧化的氧化机理。研究结果表明,300M钢在700~1200℃的氧化遵循抛物线规律。高温条件下其氧化皮为典型的3层结构,即内氧化层、中间氧化层及外氧化层,中间氧化层又分为多孔层和疏松层。当氧化温度为1200℃时,Fe O层晶粒内部的合金化元素Si、Cr等快速聚集并形成粗大的氧化物,此时Fe O层完全失去抗氧化作用,氧化速率急剧加快。
Oxidation behavior of the 300 M steel at high temperature between 700-1200℃was investigated.Surface morphologies of oxide layer and the oxide structure were investigated by means of SEM and XRD.Combined with the analysis of oxidation kinetics curves,the oxidation mechanism of the 300 M steel between 700-1200℃was analyzed.The results show that the 300 M steel presents parabolic law in the temperature range of 700-1200℃.At high temperature,the oxide scale of the 300 M steel has a typical three-layer structure,which is the outer layer,the middle layer,and the inner layer,and the inner layer is divided into porous layer and loose layer.When the oxidation temperature is 1200℃,the alloying elements Si and Cr in the Fe O layer grains rapidly aggregate and form coarse oxides,at this time,the Fe O layer completely loses its antioxidant effect,and the oxidation rate accelerates sharply.
作者
夏伟军
赵青卿
袁武华
张海成
Xia Weijun;Zhao Qingqing;Yuan Wuhua;Zhang Haicheng(School of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China;Hunan Provincial Key Laboratory of Spray Deposition Technology and Application,Hunan University,Changsha Hunan 410082,China;Wan Hang Die Forging Co.,Ltd.,China National Erzhong Group Co.,Ltd.,Deyang Sichuan 618000,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2020年第11期49-55,共7页
Heat Treatment of Metals
关键词
300M钢
高温氧化
氧化动力学
氧化皮
氧化机理
300M steel
high temperature oxidation
oxidation kinetics
oxide scale
oxidation mechanism
