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Mechanical Response and Performance Relationship of X70 Pipeline Steel with Weld Zone

机译：焊接区X70管道钢的机械响应与性能关系

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With the development of the natural gas industry, high flux natural gas pipelines will cause local deformation because of pressurization, which has an important effect in the service safety of pipeline materials. In this paper, the X70 pipeline steel with weld zone was studied, and the tensile test was used to simulate the uniaxial tensile stress. The results showed that the strain was mainly concentrated in the weld zone, which can imply that the weld zone has high strain hardening ability. The heat-affected zone with poor internal structure was prone to breakage. The research results can provide theoretical basis and experimental basis for pipeline steel welding process design and safety evaluation under high flux conditions.
机译：随着天然气工业的发展，高通量天然气管道将导致局部变形因加压，这对管道材料的服务安全具有重要作用。 本文研究了X70 X70管道钢，采用拉伸试验模拟单轴拉伸应力。 结果表明，该菌株主要集中在焊接区，这暗示焊接区具有高应变硬化能力。 内部结构差的热影响区域易于破损。 研究结果可为高通量条件下提供管道钢焊接工艺设计和安全评估的理论基础和实验基础。

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