【摘 要】
：
通过EBSD技术对冷轧退火后的Fe-18Cr-18Mn-0.63N高氮无镍奥氏体不锈钢的晶界特征分布(GBCD)进行分析,同时通过草酸电解浸蚀试验和硫酸-硫酸铁腐蚀试验研究了GBCD优化对实验用钢晶间腐蚀(IGC)性能的影响.研究结果表明：经过7％的冷轧变形+1423K保温10min的退火处理后,样品的低∑重位点阵(CSL)晶界从固溶态的47.3％增加到现在的83.3％.GBCD优化处理后,样品的
【机 构】
：
东北大学材料物理与化学研究所,沈阳110819 东北大学材料各向异性与织构教育部重点实验室,沈阳1
【出 处】
：
第六届海内外中华青年材料科学技术研讨会暨第十五届全国青年材料科学技术研讨会
论文部分内容阅读
通过EBSD技术对冷轧退火后的Fe-18Cr-18Mn-0.63N高氮无镍奥氏体不锈钢的晶界特征分布(GBCD)进行分析,同时通过草酸电解浸蚀试验和硫酸-硫酸铁腐蚀试验研究了GBCD优化对实验用钢晶间腐蚀(IGC)性能的影响.研究结果表明：经过7％的冷轧变形+1423K保温10min的退火处理后,样品的低∑重位点阵(CSL)晶界从固溶态的47.3％增加到现在的83.3％.GBCD优化处理后,样品的第二相析出明显减少,IGC性能被显著改善.研究发现在实验钢中只有∑3(包括共格的和非共格的)晶界是耐腐蚀的,只有这种晶界能被称为"有效特殊晶界".高比例的∑3晶界有效地打断了不耐蚀晶界(∑9,∑27和一般大角晶界等)的网络连通性,因此改善了高氮无镍奥氏体不锈钢的抗晶间腐蚀性能.
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