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首页> 外文期刊>Journal of Materials Engineering and Performance >U.S. Program on Materials Technology for Ultra-Supercritical Coal Power Plants
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U.S. Program on Materials Technology for Ultra-Supercritical Coal Power Plants

机译：美国超超临界燃煤电厂材料技术计划

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摘要

The efficiency of conventional fossil power plants is a strong function of the steam temperature and pressure. Research to increase both has been pursued worldwide, since the energy crisis in the 1970s. The need to reduce CO_2 emissions has recently provided an additional incentive to increase efficiency. More recently, interest has also been evinced in advanced combustion technologies utilizing oxygen instead of air for combustion. The main enabling technology in achieving the above goals is the development of stronger high temperature materials. Extensive research-and-development programs have resulted in numerous high-strength alloys for heavy section piping and for tubing needed to build boilers. The study reported on here is aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers that are capable of operating with steam at temperatures of 760℃ (1400 °F) and pressures of 35 MPa (5000 psi). The economic viability of such a plant has been explored. Candidate alloys applicable to various ranges of temperatures have been identified. Stress rupture tests have been completed on the base metal and on welds to a number of alloys. Steamside oxidation tests in an autoclave at 650℃ (1200 °F) and 800℃ (1475 °F) have been completed. Fireside corrosion tests have been conducted under conditions simulating those of waterwalls and superheater/reheater tubes. The weldability and fabricability of the alloys have been investigated. The capabilities of various overlay coatings and diffusion coatings have been examined. This article provides a status report on the progress achieved to date on this project.
机译：常规化石发电厂的效率是蒸汽温度和压力的重要函数。自1970年代的能源危机以来，全世界都在寻求增加两者的研究。减少CO_2排放的需求最近为提高效率提供了额外的动力。最近，人们对利用氧气代替空气进行燃烧的先进燃烧技术也表现出了兴趣。实现上述目标的主要使能技术是开发强度更高的高温材料。广泛的研究和开发计划产生了许多高强度合金，用于重型管道和建造锅炉所需的管道。此处报告的研究旨在确定，评估和鉴定建造能够在760℃（1400°F）的蒸汽和35℃的压力下运行的燃煤锅炉关键组件所需的材料。 MPa（5000磅/平方英寸）。已经探索了这种植物的经济可行性。已经确定了适用于各种温度范围的候选合金。已经在母材和许多合金的焊缝上完成了应力断裂测试。已经完成了在650℃（1200°F）和800℃（1475°F）的高压釜中进行的蒸汽侧氧化测试。已经在模拟水冷壁和过热器/再热器管的条件下进行了炉边腐蚀测试。已经研究了合金的可焊性和可加工性。已经检查了各种覆盖涂层和扩散涂层的功能。本文提供了有关该项目迄今为止所取得的进展的状态报告。

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