Microstructure and properties of cast iron after laser surface hardening
Microstructure and properties of cast iron after laser surface hardening
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铸铁激光表面硬化后的组织与性能
DOI：
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发表时间：
2013
期刊：
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通讯作者：
S. Nemecek
中科院分区：
文献类型：
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作者：
S. Nemecek
由于材料的不均匀性和粗晶粒显微组织，铸铁的激光表面硬化并不简单，特别是在大型铸件中。尽管如此，汽车行业对重型模具的硬化需求很高。本文总结了几年来收集的材料结构和表面性能的研究结果。以汽车工业中车身零件的生产为例，描述了石墨附近的相变。本说明书涉及马氏体和碳化物基相的形成，其导致高于65 HRC的硬度值和优异的耐磨性。
Laser surface hardening of cast iron is not trivial due to the material’s heterogeneity and coarse-grained microstructure, particularly in massive castings. Despite that, hardening of heavy moulds for automotive industry is in high demand. The present paper summarises the findings collected over several years of study of materials structure and surface properties. Phase transformations in the vicinity of graphite are described using examples from production of body parts in automotive industry. The description relates to formation of martensite and carbide-based phases, which leads to hardness values above 65 HRC and to excellent abrasion resistance.