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研究了15Cr2Ni3MoW合金穿孔顶头在900～1000℃、3～12 h、氧气气氛中氧化膜的生成行为。用OM、XRD、SEM、HV分析研究氧化膜的微观组织形貌、相组成及显微硬度的变化,并对氧化膜生成机理进行探讨。结果表明:在氧气气氛中合金生成内外两层氧化膜,外层氧化膜主要为Fe2O3和Fe3O4,内层氧化膜主要为(Fe、Cr)3O4;随氧化时间延长和氧化温度升高,氧化膜厚度不断增加,但内层与外层氧化膜之间的结合力以及内层氧化膜与顶头基体之间的结合力,不随氧化膜厚度的增加而增大,当氧化时间和温度超过个某个范围后,所生成氧化膜间的结合力反而降低。
The formation behavior of oxide film in oxygen atmosphere of 15Cr2Ni3MoW alloy piercing plug was studied at 900 ~ 1000 ℃ for 3 ~ 12 h. The microstructure, phase composition and microhardness of the oxide film were studied by OM, XRD, SEM and HV analysis. The formation mechanism of the oxide film was also discussed. The results show that the outer and inner oxide films are mainly composed of Fe2O3 and Fe3O4, and the inner oxide film is (Fe, Cr) 3O4. In the oxygen atmosphere, both the inner and outer oxide films are formed. With the increase of oxidation time and oxidation temperature, The thickness increases, but the adhesion between the inner layer and the outer oxide film and the bonding force between the inner oxide film and the plug matrix do not increase with the increase of the oxide film thickness. When the oxidation time and the temperature exceed a certain Range, the resulting bond between the oxide film but lower.