CAJ | 학술논문

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.
통과만응변속솔랍신시험,재초림계수배경중연구료용해양화온도대06Cr17Ni12Mo2Ti불수강적응력부식개렬경향적영향규률. 시험결과표명:재함불동용해양량(0/200/2000μg·kg-1 ) 적450℃화550℃초림계수배경중,불수강도정현출불동정도적응력부식개렬경향. 수착수중용해양함량적증가,불수강적응력부식개렬경향경위명현. 수착온도적상승,응력부식개렬경향반이회하강. 재함불동용해양량(0/200/2000μg·kg-1 )적650℃초림계수배경중,불수강지발생소성단렬,미발현응력부식개렬경향,병차용해양대기영향야불시흔명현.
The effects of dissolved oxygen (DO) and temperature on the stress corrosion cracking (SCC) of 06Cr17Ni12Mo2Ti stainless steel ( SS) in supercritical water environments were investigated by slow strain rate tensile tests ( SSRT) . It is found that the SCC susceptibility of the stainless steel is observed in 450℃ and 550℃ supercritical water environments containing different amounts of dissolved oxygen (0/200/2000μg·kg-1). The effect of dissolved oxygen on the SCC susceptibility is more remarkable with increas-ing amount of dissolved oxygen. However, the SCC susceptibility decreases with the increase of temperature. In 650℃ supercritical water environments containing different amounts of dissolved oxygen (0/200/2000μg·kg-1), ductile fracture can be found, but the SCC susceptibility is not observed. In these environments, the effect of DO is negligible.