Austenite Grain Growth Analysis in a Welded Joint of High-Strength Martensitic Abrasion-Resistant Steel Hardox 450

Materials

Martyna Zemlik¹  Dominika Grygier¹  Łukasz Konat¹  Robert Jasiński¹ 

[1] Department of Vehicle Engineering, Wroclaw University of Science and Technology, 50-370 Wroclaw, Poland;

关键词: wear-resistant martensitic steel;    submerged arc welding (SAW);    structures;    mechanical properties;    prior austenite grain size;    Hardox 450 steel;   

DOI  :  10.3390/ma14112850

来源: DOAJ

【 摘 要 】

The paper presents the results of tests of a welded joint of Hardox 450 steel, belonging to the group of weldable high-strength boron steels with increased resistance to abrasive wear. As a result of the conducted research, apart from the basic structural indicators, an attempt was made to determine the correlation between the grain size of the prior austenite in the characteristic weld zones and its basic mechanical properties, such as yield point, tensile strength, percentage elongation after fracture, reduction of area, and impact strength. The scope of research quoted above was carried out for a welded joint of the considered steel at delivery state (directly after welding), in the normalising annealed state, as well as in water-quenched state, using different austenitisation temperatures in the range of 900–1200 °C. The results obtained showed a large influence of the parameters of the applied thermal heat treatment on the selected structural and mechanical properties of the welded joint.

【 授权许可】

Unknown