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首页> 外文期刊>International Journal of Pressure Vessels and Piping >A review of thermal, microstructural and constitutive modelling of 9Cr steel for power plant applications: Towards a through-process model for structural integrity of welded connections
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A review of thermal, microstructural and constitutive modelling of 9Cr steel for power plant applications: Towards a through-process model for structural integrity of welded connections

机译：电厂应用9CR钢热，微观结构和本构建模的综述：朝向焊接连接结构完整性的贯通过程模型

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摘要

Life prediction for 9Cr steel welded components is an important issue facing power plant as it moves from steady-state, base-load operation to transient, flexible operation. Welding and heat-treatment of 9Cr components alters the steel microstructure to produce a heat-affected zone, which is susceptible to early failure under creep and high-temperature cyclic conditions. Optimal welding and heat treatment processes cannot feasibly be identified experimentally but finite element simulation is a practical solution to this problem. A review of modelling methodologies for welding, heat treatment and in-service operation in thermal power plant for 9Cr steel is presented here. The authors consider that macro-scale, physically-based models are the most promising models currently available since they account for changes in material microstructure while still being practical for simulations involving component-sized FE geometries.
机译：9Cr钢焊接部件的寿命预测是电厂从稳态，稳压操作移动到瞬态，灵活操作时面临的重要问题。 9CR组分的焊接和热处理改变了钢微观结构以产生热影响区域，该区域易受蠕变和高温环状条件下的早期失效。 通过实验识别最佳焊接和热处理过程，但有限元模拟是对此问题的实用解决方案。 在此提出了一种综述9CR钢热电厂中的焊接，热处理和施用运行建模方法。 作者认为，宏观规模，物理的模型是目前可用的最有前途的模型，因为它们占材料微观结构的变化，同时仍然是涉及组件大小的Fe几何形状的模拟。

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