Hot tearing is a common solidification defect in both continuous cast steels and foundry shaped castings, which has a significant impact on the quality of the final products. It is a complex phenomenon that involves both the thermal and mechanical conditions and chemical element segregation that evolves during casting process. Over several decades, much effort has been invested into improving our understanding of the conditions required for the occurrence of hot tearing and to relate these conditions with casting parameters, like casting speed in continuous cast process, alloy composition, cooling conditions, etc. This review summarizes the results from previous investigations that have focused on the hot tearing phenomenon of steels, including criteria for hot tearing, experimental methods, and several validated models for different testing methods. The factors that influence hot tearing sensitivity are also reviewed and discussed in the present work.

在连续铸钢和铸造型铸件中，热撕裂都是常见的凝固缺陷，这对最终产品的质量有重大影响。这是一个复杂的现象，涉及铸造过程中产生的热和机械条件以及化学元素偏析。在过去的几十年中，已经投入了很多精力来增进我们对发生热撕裂的条件的理解，并将这些条件与铸造参数相关联，例如连铸过程中的铸造速度，合金成分，冷却条件等。总结了以往针对钢的热撕裂现象的研究结果，包括热撕裂的标准，实验方法，以及针对不同测试方法的多个经过验证的模型。影响热撕裂敏感性的因素也在本工作中进行了回顾和讨论。