摘要
采用NACE饱和H2S溶液及示波冲击试验方法,探讨了管线钢氢致开裂(HIC)与冲击韧性(CVN)之间的相关性,并分析了其中的原因。结果表明,经过NACE饱和H2S溶液浸泡过的HIC试样在应变速率较大的冲击韧性试验条件下,其韧性变化无法表现,无论是弹性变形功 Ae、裂纹形成功Ai、裂纹扩展功Ap,还是总功At均无明显变化,因此,在实际生产中对于存在氢致开裂危险的结构不宜采用冲击韧性试验来评价其韧性大小。
Using methods of NACE H2S saturation solution and wave impacting test, the relativity between hydrogen craze and impacting tenacity of pipeline steel was discussed and analyzed. The results show that the HIC samples have no way to express the tenacity after dipping in the solution of NACE saturation H2S solution under the condition of impacting tenacity at larger stress rate. There is no obvious change no matter what recoverable strain work, cracking spreading work and the whole work. It is suggested that evaluationof the structure tenacity should use the impacting test in practical construction when cracking risk was existed.
出处
《石油工程建设》
北大核心
2002年第1期10-12,共3页
Petroleum Engineering Construction