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通过慢应变速率拉伸试验,在超临界水环境中研究了溶解氧和温度对06Cr17Ni12Mo2Ti不锈钢的应力腐蚀开裂倾向的影响规律.试验结果表明:在含不同溶解氧量(0/200/2000μg·kg-1)的450℃和550℃超临界水环境中,不锈钢都呈现出不同程度的应力腐蚀开裂倾向.随着水中溶解氧含量的增加,不锈钢的应力腐蚀开裂倾向更为明显.随着温度的上升,应力腐蚀开裂倾向反而会下降.在含不同溶解氧量(0/200/2000μg·kg-1)的650℃超临界水环境中,不锈钢只发生塑性断裂,未发现应力腐蚀开裂倾向,并且溶解氧对其影响也不是很明显.
The effects of dissolved oxygen and temperature on the stress corrosion cracking tendency of 06Cr17Ni12Mo2Ti stainless steel were investigated by slow strain rate tensile test in supercritical water environment.The results showed that under the condition of different dissolved oxygen (0/200 / 2000μg · kg -1) in stainless steel at 450 ℃ and 550 ℃, the stress corrosion cracking tendency of stainless steel is more obvious with the increase of dissolved oxygen in stainless steel.With the increase of temperature On the contrary, the tendency of stress corrosion cracking will instead decrease.Under the supercritical water environment of 650 ℃ with different dissolved oxygen (0/200 / 2000μg · kg-1), only the plastic fracture occurs in stainless steel, and the stress corrosion cracking tendency is not found, and The impact of dissolved oxygen is not obvious.