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Ultra-high crack-arresting steel plate (HIAREST) with super-refined grains in surface-layers

机译:表面层具有超细晶粒的超高抗裂钢板(HIAREST)

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摘要

To ensure the brittle fracture safety of large welded structures, the steel plates to be used in such welded structures are required to have the ability to arrest the propagation of brittle cracks (brittle crack arresting capabili- ty) on the supposition of the occurrence of brittle fractures. Noting the important role the development of shear lips play in the brittle crack prop- agation arrest mechanism, we developed a new type of steel plate that is provided with top and bottom surface layers of ultrafine microstructure by working the ferrite structure during thermal reoccurrence to facilitate the shear lip formation.
机译:为了确保大型焊接结构的脆性断裂安全性,要求在这种焊接结构中使用的钢板应具有在发生脆性的情况下阻止脆性裂纹扩展的能力(脆性裂纹阻止能力)。骨折。我们注意到剪切唇的发展在脆性裂纹的传播阻止机制中起着重要作用,因此,我们开发了一种新型钢板,该钢板通过在热发生时对铁素体组织进行加工,从而提供了超细微组织的上,下表面层,以促进剪切唇的形成。

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