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本工作研究了高温高压氢 (35 0℃ ,2 5 MPa H2 ) ,对国产氢反应器壁 30 9L 和 34 7L 不锈钢堆焊层性能的影响 .结果表明 :未经热渗氢的原始试样 ,无论是光滑试样还是缺口试样 (除缺口开在 30 9L 区域试样外 ) ,均断裂在 34 7L 区域内 .而经热渗氢后 ,无论起裂于 2 (1/4 ) Cr- 1Mo和 30 9L 熔合线 ,还是 30 9L 和34 7L的熔合线处 ,最后都断在 30 9L区域内 .这是因为热渗氢使 30 9L和 34 7L的断裂应力 ,分别从 885 MPa降至 478MPa和从 799.9MPa降至 5 6 4MPa,它们的氢脆系数分别为 86 .8%和 80 .9% .SEM断口分析结果与上述结论一致
In this work, the effect of high temperature and high pressure hydrogen (35 0 ℃, 25 MPa H2) on the properties of 30 9L and 34 7L stainless steel surfacing layer on domestic hydrogen reactor was studied.The results show that the original sample without thermal hydrogenation, Whether it is a smooth sample or a notched sample (except for the open area in the 30 9L area sample), they all break in the region of 34 7 L. After thermal hydrogenation, regardless of the initiation of cracking in 2 (1/4) Cr-1Mo And 30 9L fusion lines, or 30 9L and 34 7L fusion lines, the final break in the 30 9L area. This is because the thermal hydrogen permeation 30 9L and 34 7L fracture stress, respectively, from 885 MPa down to 478MPa and From 799.9MPa down to 5 6 4MPa, their hydrogen embrittlement coefficients were 86.8% and 80.9% .SEM fracture analysis results consistent with the above conclusions