微观组织对X80管线钢HIC裂纹扩展的影响
Effect of Microstucture on Hydrogen-induced Cracking Propagation Behavior of X80 pipeline steel
按NACE TM 0284-2003标准对X80管线钢进行HIC裂纹敏感性测试，用扫描电镜观察裂纹的扩展方式，采用背散射电子衍射（EBSD）技术分析了X80管线钢微观组织之间的取向差。结果表明：X80管线钢的HIC裂纹在针状铁素体（AF）处萌生，沿着针状铁素体和多边形铁素体（PF）的边界扩展，绕过大多数的针状铁素体；AF晶粒之间的晶界主要为小角度晶界，AF与PF之间主要为大角度晶界，这种大角度晶界很容易成为HIC裂纹扩展的通道。
he NACE TM 0284-2003 standard was employed to test the hydrogen-induce cracking sensitivity of X80 pipeline steel. The crack morphology and microstructure were observed with scanning electron microscopy (SEM). The Electron Back Scattering Diffraction (EBSD) technique was used to analyze the microstructure misorientation of X80 pipeline steel. It was found that the Hydrogen induce-cracking in X80 steel started from acicular ferrite, then extending along the grain boundary of acicular ferrite and polygon ferrite, it bypassed majority of acicular and last stopped in acicular ferrite; the boundary of AF grains were low-angle, the boundary of AF and PF were high-angle and easily become the channel for cracking propagation.
黄峰、彭先华、刘静、张杰、胡骞
材料科学冶金工业概论钢铁冶炼
X80管线钢HIC裂纹扩展针状铁素体取向差
X80 pipeline steelHydrogen induce-cracking propagationacicular ferritemisorientation
黄峰,彭先华,刘静,张杰,胡骞.微观组织对X80管线钢HIC裂纹扩展的影响[EB/OL].(2013-01-31)[2025-05-12].http://www.paper.edu.cn/releasepaper/content/201301-1269.点此复制
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