Abstract In this paper, we study the features of partial dissolution and contact melting of nonmetallic inclusions under conditions of anomalous mass transfer that promotes their fragmentation in the surface layer of hardened steel products. The mechanisms and conditions for laser melting of inclusions, mechanical destruction of solid and liquid inclusions, and the formation of satellite particles are discussed. Inclusion fragmentation upon laser processing is shown to determine the steel hardening level. Based on a study of fast melting and solidification, laser processing changes the structure and properties of nonmetallic inclusions in the surface hardened layers of steel products. The use of the obtained results will allow the development of laser processing modes, thus affecting the size, structure, distribution and content of nonmetallic inclusions in the hardened layers of the products.

中文翻译：

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激光钢加工局部重熔过程中非金属夹杂物的碎裂

摘要 在本文中，我们研究了非金属夹杂物在异常传质条件下的部分溶解和接触熔化特征，促进了它们在淬火钢产品表层的碎裂。讨论了夹杂物的激光熔化、固体和液体夹杂物的机械破坏以及卫星颗粒的形成的机制和条件。显示激光加工中的夹杂物碎裂以确定钢的硬化水平。基于对快速熔化和凝固的研究，激光加工改变了钢材表面硬化层中非金属夹杂物的结构和性能。使用所获得的结果将允许开发激光加工模式，从而影响尺寸、结构、