张梦远,龙木军,左小坦,钱亮,张亚兵,黄雁,陈登福

• 1:重庆大学材料科学与工程学院
• 2:芜湖新兴铸管有限责任公司炼钢部
• 3:中冶南方连铸技术工程有限责任公司

摘要(Abstract)：

利用建立的淬火-自回火过程传热模型开展了铸坯表面淬火试验研究,分析了淬火后铸坯表层组织的演变规律以及相应组织的形成条件。结果表明:表面淬火可以有效消除铸坯表层组织中的膜状铁素体,形成一定的淬透深度。在40～60 s的淬火时间内,淬透深度从8 mm提高到10 mm;在60～100 s的淬火时间内,淬透深度基本保持在10 mm左右。在显微组织分析的基础上,结合铸坯表层区域传热分析,给出了低碳含硼钢的两种在线表面淬火工艺方案,其预期表层组织分别为贝氏体(弱冷方案)与回火索氏体(强冷方案)。对于弱冷方案,淬透深度为4～5 mm;对于强冷方案,淬透深度可达到10 mm左右。

关键词(KeyWords)： 表面淬火;膜状铁素体;传热;淬透深度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51874060)

作者(Author): 张梦远,龙木军,左小坦,钱亮,张亚兵,黄雁,陈登福

DOI: 10.13289/j.issn.1009-6264.2021-0284

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