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- Title
New Evaluation Method for Hot Cracking Tendency of High Alloyed Steels Containing Niobium.
- Authors
Scheidhauer, Nico; Brambila, Jean Amadeo; Wolf, Gotthard; do Nascimento, Francisco Manoel Perez; Dommaschk, Claudia
- Abstract
The present study investigated existing and potential approaches for hot cracking analysis of cast alloys and showed a promising and very applicable new specimen for high alloyed steels. The reliability of this specimen has been demonstrated by adding niobium to alloy HH (ASTM A297), or alloy 1.4837 (ISO 11973). Niobium shows a very positive impact on hot cracking behavior and can thereby reduce scrap in steel foundries. Amounts above 0.6 wt% niobium can reduce the size and number of hot cracks significantly. The reduction of hot cracking tendency was quantified by the cracking factor CFNb2. The positive effect is associated with the reduction in solidification interval length that was measured by thermal analysis and the observed "healing" of cracks in the microsections. Both effects are promoted by niobium. The promotion of the ferritic solidification seems to have no positive impact on the hot cracking behavior.
- Subjects
NIOBIUM; NIOBIUM alloys; HEAT resistant steel; EVALUATION methodology; ALLOY analysis
- Publication
International Journal of Metalcasting, 2023, Vol 17, Issue 4, p2484
- ISSN
1939-5981
- Publication type
Article
- DOI
10.1007/s40962-023-00996-w