论文部分内容阅读
模拟加氢反应器的工作条件（ｐ＝ １７．５ ＭＰａ，ｔ＝ ４５０ ℃）对００Ｃｒ２０Ｎｉ１０Ｎｂ 电渣堆焊层充氢。结果表明，充氢导致堆焊层断裂韧性值减小、塑韧性显著降低。在面弯试验中，堆焊层由于充氢后脆化而发生小角度开裂，其面弯断口呈脆性准解理形态，并有较多的二次裂纹；面弯产生的显微裂纹沿δ／γ相界分布。据此认为充氢首先使δ／γ相界面脆化。充氢后的堆焊层经６３０ ℃×４ ｈ 去氢处理可消除氢脆现象，使塑韧性恢复。
The hydrogenation of the 00Cr20Ni10Nb electroslag overlaying layer was simulated under the working conditions (p = 17.5 MPa, t = 450 ℃) of the simulated hydrogenation reactor. The results show that the fracture toughness of the surfacing layer decreases with the hydrogen filling, and the plasticity and toughness decrease significantly. In the face bending test, the overlay layer is small-angle cracked due to the embrittlement after hydrogen charging, and the brittle quasi-cleavage shape is observed in the face bending fracture and more secondary cracks are formed. The micro-cracks along the δ / Γ phase boundary distribution. Therefore, it is considered that charging hydrogen firstly embrittle the δ / γ phase interface. Hydrogenated surfacing layer by 630 ℃ × 4h dehydrogenation treatment can eliminate hydrogen embrittlement, the plastic toughness recovery.