Causes analysis on anormal elongation of low-alloyed high strength steel

doi:10.13251/j.issn.0254-6051.2020.05.050

Abstract

Abstract: In view of the phenomenon of lower elongation about low-alloyed high strength steel, the chemical composition analysis, microstructure observation, fracture analysis and inclusion composition of the samples of the unqualified product were carried out. The results show that the main cause is related to the abnormal structure due to segregation of manganese elements, which formes hydrogen trap and then lead to hydrogen embrittlement, forming hydrogen brittle facets on the tensile fracture.

Key words: low-alloyed high strength steel, elongation, segregation, inclusion, tensile flake

CLC Number:

TG115.2

Sun Xuejiao. Causes analysis on anormal elongation of low-alloyed high strength steel[J]. Heat Treatment of Metals, 2020, 45(5): 262-265.

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