Solidification and microstructure of a high alloy stainless steel

Journal Article · Fri Jul 01 04:00:00 EDT 1994 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02665488· OSTI ID:7278324

Liu, Z K; Pile, D ^[1]; Andersson, J O; Brorson, A ^[2]

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1. Royal Inst. of Tech., Stockholm (Sweden). Div. of Physical Metallurgy
2. Avesta Sheffield Research and Development, Avesta (Sweden)

The steel considered in the present work can be classified as a 6Mo austenitic stainless steel, which has a much higher corrosion resistance than many other commercially available stainless steels. However, because of macrosegregation during solidification of ingot casting, the high alloy content in the steel, especially Mo, N, C, enhances precipitation of intermetallic phases such as [sigma] phase. Such precipitation mainly occurs in the center of the material and has normally no significant effect on mechanical properties or surface corrosion resistance. The introduction of modern production methods such as continuous casting of slabs for stainless sheet production has reduced the macrosegregation tendency and related precipitation. However, the microsegregation in a small scale may be enhanced as the higher cooling rate prevents the diffusion in the solidified region. In the present work, the continuous casting solidification process was simulated in a laboratory gradient furnace and investigated by examining the samples quenched for high temperature. The scanning electron microscopy and transmission electron microscopy investigations were carried out in order to understand the solidification process and the microstructure.

• OSTI ID: 7278324
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 25:7; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CASTING
CRYSTALS
DATA
DENDRITES
EXPERIMENTAL DATA
FABRICATION
HIGH ALLOY STEELS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LAMELLAE
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NUMERICAL DATA
PHASE TRANSFORMATIONS
SOLIDIFICATION
STAINLESS STEELS
STEELS