2.25Cr-1Mo钢和FV520B钢的氢脆敏感性对比试验研究  

Study on Hydrogen Embrittlement Between 2.25Cr-1Mo Steel and FV520B Steel

作　　者：唐才宇[1] 杨思泽[1] 崔莲顺[1] Cai-yu Tang;Si-ze Yang;Lian-shun Cui(Shenyang Blower Works Group Corporation)

机构地区：[1]沈阳鼓风机集团股份有限公司

出　　处：《风机技术》2022年第4期64-67,共4页Chinese Journal of Turbomachinery

摘　　要：通过电化学充氢和慢应变拉伸试验以及SEM断口形貌观察对2.25Cr-1Mo合金结构钢和FV520B马氏体沉淀硬化不锈钢的氢脆敏感性做出了评价。结果表明,在充氢环境中两种材料表现出了相似的抗氢脆性能,两种材质试样的断面收缩率与未充氢试样相比均呈现出相同的下降趋势;氢对缺口强度的影响也比较接近,2.25Cr-1Mo钢和FV520B钢充氢后的强度衰减率分别为9.2%和8.6%;SEM断口分析结果显示:两种材料充氢后的断口形貌均表现出了相似的韧窝状断裂特征,它们的破坏形式并没有因为充氢而发生改变。由此可见,两种材料的抗氢能力处于同一等级,具有成本优势的2.25Cr-1Mo合金结构钢可以和FV520B沉淀硬化不锈钢一样用于氢介质条件下运行的透平式压缩机中。The hydrogen embrittlement of 2.25Cr 1Mo alloy steel and FV520B martensitic precipitation-hardening stainless steel was studied using electrochemical hydrogen charging,slow strain rate tension test and SEM fracture surface topography observation.The results showed that these two kinds of steel exhibited a similar hydrogen resistance ability,the shrinkage ratio of the cross section for 2.25Cr-1Mo and FV520B samples after charging showed the same declining trend,and at the same time the effect of hydrogen on notch tensile strength was also close between 2.25Cr-1Mo and FV520B,specifically the reduction percent of the tensile strength for the hydrogen charging samples was 9.2%and 8.6%separately.SEM showed that the fracture surface exhibited similar dimple fracture characteristics for these two kinds of steels,and the fracture pattern did not change after hydrogen charging for them.It can be seen that the hydrogen resistance ability was at the same level for the two kinds of steels,and 2.25Cr-1Mo steel could be used as an alternative material for the turbo compressors worked in the hydrogen condition just as FV520B.

关 键 词：2.25CR-1MO FV520B 氢脆 力学性能 断口形貌 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程] TH133.3[自动化与计算机技术—控制科学与工程]