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X70管线钢相变规律研究

Wide and Heavy Plate(2011)

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Abstract
利用MMS-200热模拟试验机研究了X70管线钢的相变规律,采用热膨胀法及金相法建立了连续冷却转变曲线,分析了工艺参数对组织的影响规律。试验结果表明,试验钢在低冷速下形成的组织主要为多边形铁素铁,随着冷却速度增加,组织变细,当冷速在20~40℃/s时,可以获得理想的针状铁素体组织。
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Key words
Continuous cooling transformation curve,X70,Controlled cooling,Acicular ferrite
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