X90直缝管理化性能及常见问题分析

X90直缝管理化性能及常见问题分析 Physical & chemical properties and common problems analysis of X90 straight seam pipe 王冬林 WANG Donglin 1 2 first-author 蒋洪 JIANG Hong 3 张琦 ZHANG Qi 4 刘月发 LIU Yuefa 4 张丽丽 ZHANG Lili 3 刘洋 LIU Yang 3 中国石油集团石油管工程技术研究院 中国石油集团石油管工程技术研究院 Beijing Longsheng Tyco Petroleum Pipe Technology Company Beijing Longsheng Tyco Petroleum Pipe Technology Company 北京隆盛泰科石油管科技有限公司 北京隆盛泰科石油管科技有限公司 Construction Projec t Management Branch of State Pipe Network Group Construction Projec t Management Branch of State Pipe Network Group 国家管网集团建设项目管理分公司中俄东线江苏项目部  国家管网集团建设项目管理分公司中俄东线江苏项目部  CNPC Tubular Goods Research Institute CNPC Tubular Goods Research Institute 中国石油技术开发有限公司 中国石油技术开发有限公司 China Petroleum Technology Development Co.,Ltd. China Petroleum Technology Development Co.,Ltd. 为了加强高性能钢管质量控制,从化学成分、力学性能及金相组织等几个方面对国内10家主要钢管厂生产的X90直缝管进行了研究。分析了X90直缝管性能控制,对化学成分各元素、拉伸性能、冲击性能、硬度等控制程度进行了排序,与此同时从性能和焊接脆化两个方面分析了X90直缝管问题,并给出了相应的原因分析及处理方向。分析结果表明:X90直缝管化学成分应加强Nb+V+Ti、P、CEpcm、Mn的控制;拉伸性能控制程度排序为:延伸率>抗拉强度>屈服强度,要特别注意屈强比的控制;冲击功平均值控制程度为:母材横向控制最好,焊缝横向控制最差,热影响区横向居中,但冲击功标准差控制程度为:热影响区横向标准差控制最差,母材横向次之,焊缝横向最好;金相组织熔合区PF占的比例较大是产生软化的主要原因,应重点关注。 In order to strengthen the quality control of high performance steel pipe, the chemical composition, mechanical properties and metallographic microstructure of X90 straight seam pipe produced by 10 major domestic steel pipe plants are analyzed in detail. The performance control of X90 straight seam pipe is analyzed, and the control degrees of each element of chemical composition, tensile properties, impact properties and hardness are ranked. At the same time, the problems of X90 straight seam pipe are analyzed from two aspects of performance and welding embitterment, and the corresponding cause analysis and treatment direction are provided. The results show that the control of the chemical components of Nb+V+Ti, P, CEpcm and Mn should be strengthened. The control degree ranking of tensile property is elongation >tensile strength > yield strength, and special attention should be paid to the control of yield ratio. The control degree ranking of average impact energy is base metal transverse control > heat affected zone transverse control > weld transverse control. But the control degree ranking of standard deviation of impact energy is weld transverse control > base metal transverse control > heat affected zone transverse control. PF in the fusion zone of metallographic microstructure accounts for a large proportion, which is the main cause of softening and should be paid close attention to. X90直缝管 性能 分析 工艺 问题 焊接脆化 X90 straight seam pipe performance analysis process problem welding embitterment TE973.3 国家重点研发计划（2018YFF0215003） 2022-03-08 11 51