Si对含铜钢表面高温氧化后铜元素富集的影响
董汉君 张晖 何宜柱
安徽工业大学材料科学与工程学院
Effects of Si on Cu Enrichment at Copper-containing Steel Surface after High Temperature Oxidation
摘要 针对国际镍价格巨幅波动造成09CuPCrNi耐候钢生产成本过高的问题，研究Si取代Ni元素对抑制含铜钢高温氧化后基体表层铜元素富集的影响。结果表明，添加Si元素使合金氧化后形成较多内氧化产物2FeO•SiO2，该氧化物在生长过程中对基体局部区域形成包裹，可割断液相铜的扩散途径，降低富铜相中Cu的浓度，有利于减轻含铜钢高温氧化后基体表面铜元素偏聚，但同时会导致合金在1150 ℃以上高温区抗氧化性能减弱。
关键词 ：
Si ,
09CuPCrNi ,
含铜钢 ,
高温氧化 ,
铜富聚
Abstract ：Production cost of 09CuPCrNi weathering steel was greatly increased by huge fluctuations in world nickel price. The effects of using Si instead of Ni on preventing formation of liquid Cu at the scale/steel interface of copper-containing steel after high temperature oxidation were studied. The results showed that addition of Si enhanced the formation of internal oxidation product 2FeO•SiO2 which can reduce the content of Cu in copper-rich phase, as well as cut off diffusion routes of liquid copper by encapsulating the local area of matrix in it. However also the addition of Si is beneficial on reducing copper enrichment at surface matrix, but would increase oxidation rate of alloys when oxidation temperature was higher than 1150 ℃.
Key words ：
Si
09CuPCrNi
Copper-containing steel
High temperature oxidation
Copper enrichment
收稿日期: 2009-03-16
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