铜元素在钢表面氧化过程中富集规律的研究
Study on Enrichment Rule of Copper in Steel Surface During Oxidation
李长荣1,2, 杨小平1, 文 辉1
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作者单位：1. 贵州大学材料与冶金工程学院, 贵州 贵阳 550003; 2. 贵州省材料结构与强度重点实验室, 贵州 贵阳 550003
中文关键字：残余铜元素； 表面氧化； 富铜相； 热脆性
英文关键字：residual element copper; surface oxidation; copper-rich phase; hot brittleness
中文摘要：对不同铜含量的钢在表面氧化过程中铜的富集规律进行了研究。研究结果表明：钢的热加工性能与钢中铜含量有着密切联系。残余铜含量越高，晶界与基体界面氧化腐蚀越严重，热脆性倾向越大；热加工时间越长，液态富铜相渗透晶界越深，分布面越宽，晶界富集量越多；热加工温度越高，晶内、晶界氧化越剧烈。合理地改善热加工时间和温度，可以减轻钢中残余铜元素所导致的热脆性。
英文摘要：Enrichment rule of residual copper in different Cu-content steel surface during oxidation was studied. The research results indicate that the hot-working character of steel has intimately relationship with the copper content in steel. The more the content of residual copper in steel, the more severely the oxidation corrosion occurs on grain boundary and matrix, the greater the hot brittleness tendency; the longer the hot-working time, the deeper the liquid phase of copper-rich infiltrates into grain boundary, the wider distributes on matrix and the more the content enrichs on grain boundary; the higher the hot-working temperature, the severer the oxidation in the intercrystalline and grain boundary. Improving the time and temperature of hot-working process rationally, the hot brittleness caused by residual copper is lightened.