The mechanical characteristics and structural features of the heat-resistant 12Kh1MF steel after long-term operation in a bend of the TPP (thermal power plants) steam pipelines were analyzed. The change in the technical state of the metal of different zones of the bend and the anisotropy of properties across the pipe wall thickness were established. It was found that in the stretched zone of the bend near the outer surface of the pipe the steel degraded more intense than in other zones, which was due to the most favorable operating conditions for creep.

中文翻译：

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TPP管道弯管12Kh1MF钢长期运行后的结构力学状态

分析了耐热12Kh1MF钢在TPP（火电厂）蒸汽管道弯管中长期运行后的力学特性和结构特征。建立了弯管不同区域金属技术状态的变化以及管壁厚度上性能的各向异性。结果发现，在靠近管道外表面的弯头拉伸区域，钢的降解比其他区域更严重，这是由于最有利于蠕变的操作条件。