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Inclusion Characterization in High Strength Low Alloy Steel for Pipeline Application

《钢铁研究学报:英文版》2011年 第S1期 | Wu Paul McLean Alex   Dept.Mat.Sci.& Eng. University of Toronto Ontario Canada M5S 3E4
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摘 要: In this work several methods including sulphur printing,modified spark spectrum analysis and SPEED-SEM-EDX methods were used to study the morphology,composition and distribution of inclusions in pipeline steel.The procedure for the last-mentioned method includes:metal sample preparation using Selective Potentiostatic Etching by Electrolytic Dissolution (SPEED) together with inclusion observation and detection using SEM-EDX equipment.The results of sulphur printing and spark spectrum analysis showed that there was a well-defined centerline containing relatively high concentrations of sulphur in the steel slab studied in this work.The results of SEM study showed that most inclusions found in the steel samples were globular in morphology,and roughly 2-5 micrometers in size.The inclusions were rich in sulphur and manganese.Some inclusions with a bright globular shape contained Al,Ca,Mn and S,and were likely composed of MnS,CaS and calcium aluminate.It was concluded that sulphur printing is a convenient and inexpensive method for inclusion analysis,Spark Spectrum Analysis provides a complete and self-contained technique for inclusion detection,and the SPEED-SEM-EDX procedure is best suited for in-situ and three-dimensional observation of inclusions.
【分 类】【工业技术】 > 冶金工业
【关键词】 PIPELINE steel INCLUSION detection SEGREGATION SULPHIDE continuous casting HIC CRACKING
【出 处】 《钢铁研究学报:英文版》2011年 第S1期 762-768页 共7页
【收 录】 中文科技期刊数据库