C90油管钢的氢损伤
cnki(1996)
Abstract
对比研究了三种油管钢(宝钢的C90和日本的SM90及SM95)的氢致开裂性能.SM90,SM95和C90产生氢损伤的临界扩散氢质量分数(×10-6)分别为1.76,4.3和8.38;临界全氢质量分数(×10-6)分别为4.24,6.35和10.22三种钢在H2S中的门槛应力σth/σs分别为0.64,0.80和0.85.三种油管钢抗氢损伤能力和抗氢致滞后断裂的能力是一致的,以C90为最好,它和氢的扩散系数无关.C90钢缺口试样氢致滞后断裂门槛值KIH与可扩散的氢质量分数w0有关,实验获得KIH=46-12.51lnw0.理论分析和实验结果完全一致.对C90钢,当w0≤4.8×10-6时,在任何KI/KC下均将获得韧窝断口;w0≥7.6×10-6,KI/KC≥0.5时,则氢致韧断;KI/KC≤0.4时,则氢致脆断.
MoreKey words
C90钢,SM90钢,SM95钢,氢损伤,氢致滞后断裂,
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