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首页> 外文会议>AIST steel properties amp; applications conference proceedings combined with MSamp;T' 10 materials science and technology 2010 >Effect of Microstructure on Lower Temperature Toughness for High-strength Pipe Steels
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Effect of Microstructure on Lower Temperature Toughness for High-strength Pipe Steels

机译：显微组织对高强度管钢的低温韧性的影响

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摘要

With the advanced development of energy sources, the demand for relatively heavy gauge (i.e. 16 mm and above) high-strength pipeline steels (X60 and above) produced by hot strip mills (HSM) has considerably increased. In addition, for some critical gas transmission applications, strict demands on the pipe steel lower temperature toughness are usually required. Due to several technical aspects related to HSM process, satisfying such applications is challenging and requires careful control of microstructure which is mainly governed by steel chemistry and thermomechanical processing (TMP) parameters. Microstructures in high strength pipe steels are complex and are characterized by various techniques. In this work, an attempt to correlate the low temperature toughness performance measured by drop weight tear tests with the microstructure characterized by SEM-EBSD, is made. The paper will demonstrate the importance of SEM-EBSD technique to support the conventional optical metallography for a better characterization of complex microstructures found in high strength pipe steels.
机译：随着能源的先进发展，对热轧机（HSM）生产的较重规格（即16mm及以上）高强度管线钢（X60及以上）的需求已大大增加。此外，对于某些关键的气体传输应用，通常要求对管钢的低温韧性有严格的要求。由于与HSM工艺相关的几个技术方面，要满足此类应用具有挑战性，并且需要仔细控制微观结构，而微观结构主要受钢化学和热机械加工（TMP）参数支配。高强度钢管的显微组织很复杂，并且具有多种技术。在这项工作中，尝试将通过落锤撕裂试验测量的低温韧性性能与以SEM-EBSD为特征的微观结构相关联。本文将证明SEM-EBSD技术对于支持常规光学金相学以更好地表征高强度钢管中复杂组织的重要性。

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