Influence of Cast Structure Parameters on Ductility Properties of Low-Carbon Microalloyed Steels

被引：0
|
作者：
Filatov, A. N. [1 ]
Goli-Oglu, E. A. [1 ]
Kazarin, A. Yu. [2 ]
Naumenko, V. V. [2 ]
机构：
[1] NLMK DanSteel, Frederiksvaerk, Denmark
[2] Novolipetsk Met Plant, Lipetsk, Russia
来源：
METALLURGIST | 2024年 / 67卷 / 9-10期
关键词：
continuously cast slab; low-carbon steel; thick rolled sheet; triple point; cast macrostructure; microstructure; impact energy; fractographic analysis;
D O I：
10.1007/s11015-024-01635-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
On the example of industrial continuously-cast slabs 355 mm thick of two steels of different chemical compositions recommended for the production of thick heavy plates of quality categories S355ML according to EN 10025-4:2019 and S355NL according to EN 10025-3:2019 features of structure formation and their potential effect on low-temperature impact energy of a continuously cast slab are studied. Macro-and microstructural conditions are studied, the quantitative composition of structural components is calculated, the point of the ternary junction is determined, and values of low-temperature impact energy at 1/8, 1/4 and 1/2 of the slab thickness, 1/4 and 1/2 of the slab width are obtained, and the transition temperature for entirely brittle failure is established. Fractographic analysis is conducted, fracture structure is described, and non-metallic inclusions are identified. Individual examples of the possible inheritance of structural inhomogeneity from slab to thick sheet are illustrated.
引用
收藏
页码：1425 / 1437
页数：13
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