对TP304H(0Cr19Ni9)耐热不锈钢采用喷丸处理工艺进行表面 处理，连同未处理管同时安装在1000 t/h电站锅炉的屏式再热器上,实际运行7552 h后取样 分析管子内壁高温水蒸气氧化情况.观察结果表明，喷丸处理减小了内氧化倾向，合金元素C r在表层区域富集，氧化膜层的物相构成由Fe的氧化物转变为以Cr氧化物为主的形态，氧化 膜更为致密，有效提高了耐热钢的抗水蒸汽氧化性能.文中分析了喷丸对氧化机理的影响， 并讨论了喷丸处理工艺对氧化过程中扩散机理的影响以及氧化膜物相组成的变化.
TP304H(0Cr19Ni9)steels with and without shot blast ing were tested in a reheater of 1000 t/h boiler for 7552 hours.The results sho w that shot blasting can decrease the thickness of oxide scale,and enhance the c ompactness of oxidation layer.Cr concentrating in the surface can prevent the ou t diffusion of Fe,and decrease the oxidation speed,thus effectively improve the steam oxidation resistance.The effects of shot blasted on oxidation mechanism ar e analyzed,and the oxidation process of the scale phase is also discussed.
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