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Next Generation Heat-Resistant Cast Ni-Cr Alloy with Improved Carburization Control

具有改进渗碳控制的下一代耐热铸造镍铬合金

基本信息

批准号：
571330-2021
负责人：
Kish, Joseph
金额：
$ 1.46万
依托单位：
McMaster University
依托单位国家：
加拿大
项目类别：
Alliance Grants
财政年份：
2021
资助国家：
加拿大
起止时间：
2021-01-01 至 2022-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=729146
关键词：
Next Generation Heat Resistant Cast

项目摘要

The overarching goals of the partnership between KUBOTA Materials Canada Corporation and McMaster University are to: (i) develop the next generation heat-resistant cast UCX (48Ni-41Cr) alloy with improved carburization resistance as radiant furnace coil tubes for ethylene production via steam cracking, and (ii) provide experiential training opportunity for a PhD-level HQP with the development of advanced materials with improved performance for harsh environments. Benefits from improved control of carburization of radiant furnace coil tubes in ethylene production via steam cracking include: (i) reduced energy use, (ii) reduced CO2 production and (iii) extended tube lifetime (by up to 50%). The new direction proposed involves developing the next generation UCX alloy by adding large cation diameter reactive rare earth elements (Ce and/or La), whilst simultaneously "dealloying" with Si, with improved chromia scale protection (better adhesion and reduced internal oxidation/carburization). Two key benefits of large cation diameter reactive element addition include (i) enhanced selective oxidation of Cr and (ii) improved adhesion with the substrate. Chromia scale protection improvements associated with reactive element additions have been demonstrated for Ni-25Cr alloys, but not for cast alloys, with higher Cr contents, such as UCX.

KUBOTA Materials Canada Corporation与麦克马斯特大学合作的总体目标是：（i）开发新一代耐热铸件UCX具有改进的抗渗碳性的（48 Ni-41 Cr）合金作为通过蒸汽裂解生产乙烯的辐射炉盘管，及（ii）为博士提供实习机会-HQP级，开发出性能更好的先进材料，以适应恶劣环境。在通过蒸汽裂解的乙烯生产中，改进对辐射炉盘管的渗碳控制的益处包括：（i）减少能量使用，（ii）减少CO2产生和（iii）延长管寿命（高达50%）。提出的新方向涉及通过添加大阳离子直径的活性稀土元素（Ce和/或La）开发下一代UCX合金，同时与Si“脱合金化”，具有改进的氧化铬氧化皮保护（更好的粘附性和减少的内部氧化/渗碳）。大阳离子直径反应性元素添加的两个关键益处包括（i）增强Cr的选择性氧化和（ii）改善与基底的粘附。对于Ni-25 Cr合金，已经证明了与活性元素添加相关的氧化铬氧化皮保护改进，但对于具有较高Cr含量的铸造合金，例如UCX，则没有。