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- Title
Root Cause Analysis of Surface Cracks in Heavy Steel Plates during the Hot Rolling Process.
- Authors
Bahrami, Abbas; Kiani Khouzani, Mahdi; Mokhtari, Seyed Amirmohammad; Zareh, Shahin; Yazdan Mehr, Maryam
- Abstract
This paper investigates the root cause of the formation of surface cracks on hot-rolled C–Mn constructional steel heavy plates. Cracks are rather evenly distributed over the surface in the form of colonies of cracks. Samples were cut from the heavy plate. The microstructure of samples in the as-cast and hot-rolled states were studied using optical and electron microscopes as well as energy dispersive X-ray spectroscopy (EDS). Results show that cracks are heavily oxidized. De-carburized areas are also seen alongside cracks. The crack tip is in the form of a deer-horn, indicating that crack branching has taken place during deformation. The crack initiation sites are V-shaped grooves on the surface of as-cast slabs. Correlations between microstructures, processing parameters, and crack formation are discussed.
- Subjects
IRON &; steel plates; FRACTOGRAPHY; HOT rolling; SURFACE cracks; SURFACE analysis
- Publication
Metals (2075-4701), 2019, Vol 9, Issue 7, p801
- ISSN
2075-4701
- Publication type
Article
- DOI
10.3390/met9070801