...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Engineering failure analysis >Microstructural degradation of two cast heat resistant reformer tubes after long term service exposure
【24h】

Microstructural degradation of two cast heat resistant reformer tubes after long term service exposure

机译：长期使用后，两个铸造耐热重整管的显微组织降解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Microstructural evolution of a gas reformer tube made of the two dissimilar heat-resistant cast alloys, 25Cr-35Ni and 28Cr-48Ni-5W, was studied using light optical microscopy and scanning electron microscopy equipped with energy dispersive spectroscopy point analysis. Specimens were cut from an ex-service, failed reformer tube aged 8 years. The phases and carbides at each section of the reformer tube were determined and compared with as-cast conditions. It was found that the specimens located far from the bottom or the roof of the reformer box had mainly meta-stable phases such as G-phase or M_(23)C_6 due to exposure to intermediate temperatures. Those inside the reformer box, however, had phases such as M_6C carbides which are more stable than M_(23)C_6, and NbC due to exposure to high temperatures above 1000 °C.
机译：使用装有能量色散光谱点分析的光学光学显微镜和扫描电子显微镜研究了由两种不同的耐热铸造合金25Cr-35Ni和28Cr-48Ni-5W制成的气体重整管的组织演变。标本是从8岁失效的重整管中退役的。确定了重整管各段的相和碳化物，并与铸态条件进行了比较。发现远离重整箱底部或顶部的样品由于暴露于中间温度而主要具有亚稳态相，例如G相或M_（23）C_6。但是，由于暴露于1000°C以上的高温下，重整炉内部的那些相具有比M_（23）C_6稳定的M_6C碳化物和NbC等相。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号