采用直接淬火+回火和离线淬火+回火两种调质工艺试制了SPV490Q大型石油储罐用高强钢.研究了淬火工艺对其力学性能和显微组织的影响,分析了经640℃回火后,钢的组织与性能的特征.结果表明,采用直接淬火加回火工艺,钢板具有更好的强韧匹配及耐回火性能.
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