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对P91钢的高硬度和低硬度焊缝的冲击功、硬度、断裂韧度和持久强度进行了试验研究,结果表明:硬度高、韧性低的R焊缝具有高的持久强度;硬度低、韧性高的D焊缝具有低的持久强度。材料持久强度的高低与部件的蠕变寿命密切相关。
The experimental work on the impact energy, hardness, fracture toughness and ultimate strength of P91 steel with high hardness and low hardness was studied. The results show that the R seam with high hardness and low ductility has high durability, low hardness and toughness High D weld seam has low long-lasting strength. The strength of the material is closely related to the creep life of the part.