【摘要】 结合X100管线钢管开发研究成果,对X100管线钢管开发研究中普遍关注的断裂控制、高屈强比、各向异性、缺陷容限和韧脆转变行为等主要问题进行了分析讨论。研究结果表明,用DWTT试验和Battelle总结的85%SA对应温度经验方法能准确预测X100钢管的韧脆转变温度和断裂行为;目前只有全尺寸实物爆破试验法是适用于X100管线裂纹止裂行为预测的可靠方法。因此,X100管线钢管的应用还需根据具体管线服役工况,在API SPEC 5L标准基础上,补充屈强比、止裂韧性及DWTT等关键技术指标的要求,以保证X100管线的服役安全。更多还原

【Abstract】 In combination of research results on X100 line pipe, it discussed common interested problems such as fracture control, higher yield ratio, anisotropy, defect tolerance, ductile to brittle transition, etc. The researched results showed that the ductile-brittle transition temperature and the fracture behavior of X100 steel pipe can be accurately predicted through corresponding temperature of 85% SAof DWTT test; and only full-scale burst test is a reliable method to predict fracture behavior of X100 pipeline. Therefore, at present the additional technical requirements shall be made according to the actual engineering situation, to determine the various technical indicators based on API SPEC 5L standard, such as the yield ratio,arrest toughness, DWTT and so on, to ensure the service safety of X100 line pipe.更多还原