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研究内容及结果: (仅指本单位承担的石油管线用钢的失效分析部分) (Ⅰ)建立了φ400mm以下实物管的常、低温断裂力学打压装置(可达-100℃,320大气压)。并取得实物管道在25～-110℃温度域内的打压破断结果。 (Ⅱ)对国产WX-60及三种进口管道用钢板进行了BDWTT;FATT;COD转变温度等断裂力学实验,并与打压破断转变温度建立了相互关系,为利用实验室断裂力学结果预测打压破断提供了实验论证。 (Ⅲ)对WX-60钢板进行了水介质中的腐蚀疲劳实验;表明水介质对浅裂纹的扩展
Research contents and results: (Only refers to the failure analysis section of steel for petroleum pipeline undertaken by our unit.) (I) The normal and low-temperature fracture mechanics pressure device (up to -100 ° C and 320 atm) of φ400mm pipe is established. And obtained the physical pipeline in the 25 ~ -110 ℃ temperature range of breaking pressure results. (Ⅱ) Fracture mechanics tests of BDWTT, FATT; COD transition temperature and so on were made on domestic WX-60 steel and three kinds of imported pipeline steel plates, and their interrelations were established with the crushing and rupturing transition temperature. In order to predict fracture and rupture by laboratory fracture mechanics results, Provide experimental evidence. (Ⅲ) Corrosion fatigue test of WX-60 steel plate in aqueous medium is shown; it shows that the expansion of shallow cracks by aqueous medium