Mechanism of edge crack formation in AISI304L steel during hot rolling

Articles in Press

Document Type : Research Paper

Authors

1 IRAN ALLOY STEEL

2 department of mining and metallurgical engineering, Yazd University

3 department of production technology, Iran Alloy Steel Company

10.22034/ijissi.2024.551480.1229

Abstract

In this study, the effect of delta ferrite formation and segregation of alloying elements on the mechanism of edge cracking on the surface of AISI304L stainless steel during hot rolling in Iran Alloy Steel Company was evaluated. For this purpose, scanning electron microscopy (SEM) with two detectors, SE and BSE, and EDX analysis were used to examine the areas around the crack. The results was shown that the tendency to create edge cracks during hot rolling increases with enhancement delta ferrite content and the mechanism of crack growth is along the delta ferrite and the delta ferrite/ austenite interface. SEM studies of the crack-containing specimens in showed the number of micro-cracks in the areas around the main crack and the presence of worm-shaped delta ferrites and delta ferrite islands in the austenitic matrix. In addition, the segregation of the copper element also plays an important role in creating cracks in the surface of AISI304L stainless steel ingots during hot rolling.

Keywords

International Journal of Iron & Steel Society of Iran

Articles in Press, Accepted Manuscript
Available Online from 09 March 2024

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