| 时效温度对Super304H钢析出相的影响 |
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| 引用本文： | 李新梅,邹勇,张忠文,邹增大.时效温度对Super304H钢析出相的影响[J].材料热处理学报,2009,30(6). |
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| 作者姓名： | 李新梅 邹勇 张忠文 邹增大 |
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| 作者单位： | 1. 山东大学材料液固结构演变与加工教育部重点实验室,山东,济南,250061
2. 山东电力研究院,山东,济南,250002 |
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| 基金项目： | 山东省电力集团公司重点科技项目，山东省自然科学基金 |
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| 摘 要： | 利用扫描电子显微镜、电子探针、X射线衍射和透射电镜研究了新型奥氏体耐热钢Super304H在高温时效条件下析出相的变化.结果表明,Super304H钢经700～1250℃时效后,组织中出现4种析出相:Nb(C,N)、富Cu相、M_(23)C_6和NbCrN.随时效温度的不同,析出相发生析出或溶解的变化,同时它们的形态、分布和数量随温度变化呈现出不同的变化规律,其中M23C6在700～900℃主要沿晶界析出,这将会降低钢的高温蠕变强度及抗晶间腐蚀性能.
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| 关 键 词： | Super304H钢 时效 析出相 |
Effect of aging temperature on precipitation of Super304H steel |
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| LI Xin-mei,ZOU Yong,ZHANG Zhong-wen,ZOU Zeng-da.Effect of aging temperature on precipitation of Super304H steel[J].Transactions of Materials and Heat Treatment,2009,30(6). |
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| Authors: | LI Xin-mei ZOU Yong ZHANG Zhong-wen ZOU Zeng-da |
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| Abstract: | Mierostrueture of novel anstenitic heat-resistance steel Super304H after aging at different temperatures was investigated by means of scanning electron mieroscopy ( SEM ), electren probe microanalysis (EPMA), X-ray diffraetion (XRD) and transmission electron microscopy (TEM). The experimental results indicate that the precipitated phases of Nb(C,N) 、Cu-rich phase, M_(23)C_6 and NbCrN are detected depending on different aging temperatures, when the super304H steel is aged at 700 ～1250℃. With the variation of aging temperature, the different precipitated phases were observed in the steel, and the morphology and amount of the precipitates changed. M_(23) C_6 carbides mainly precipitated along grain boundary for the steel aged at 700 ～ 900℃, leading to deteriorate high temperature creep strength and intergranular eorrosion resistant of Super304H steel. |
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| Keywords: | Super304H steel aging treatment precipitation |
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