A role of {delta}-ferrite in edge-crack formation during hot-rolling of austenitic stainless steels

Journal Article · Wed Oct 15 00:00:00 EDT 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(97)00221-2· OSTI ID:540908

Czerwinski, F ^[1]; Brodtka, A; Cho, J Y; Szpunar, J A ^[1]; Zielinska-Lipiec, A ^[2]; Sunwoo, J H ^[3]

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1. McGill Univ., Montreal, Quebec (Canada). Dept. of Metallurgical Engineering
2. Univ. of Mining and Metallurgy, Cracow (Poland). Inst. of Metallurgy
3. Atlas Stainless Steels, Tracy, Quebec (Canada)

Austenitic stainless steels are substantially harder during hot-rolling than either ferritic or mild steels. The objective of this study is to verify the possible correlation between the edge-crack formation during hot-rolling and the presence of {delta} ferrite in austenitic stainless steel. Hot-rolled plates of austenitic stainless steels, examined at room temperatures, contain up to 9% of {delta} ferrite in austenitic matrix. The distribution of ferrite in steel plate is inhomogeneous: the highest ferrite content is located in the vicinity of the plate edge. Moreover, the content of {delta} ferrite changes irregularly across the plate thickness. The results obtained from analysis of several plates suggest a correlation between the maximum content of {delta} ferrite in steel microstructure and the length of the edge-crack formed during hot-rolling: the higher the volume fraction of ferrite, the longer the edge-crack.

• Sponsoring Organization: Natural Sciences and Engineering Research Council of Canada, Ottawa, ON (Canada)
• OSTI ID: 540908
• Journal Information: Scripta Materialia, Vol. 37, Issue 8; Other Information: PBD: 15 Oct 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MICROSTRUCTURE
FRACTURE PROPERTIES
HOT WORKING
STAINLESS STEEL-304
STAINLESS STEEL-304L
CRACKS
FERRITE
CONCENTRATION RATIO
CORRELATIONS
EXPERIMENTAL DATA