Manufacturing Technology 2019, 19(6):966-972 | DOI: 10.21062/ujep/404.2019/a/1213-2489/MT/19/6/966
Treatment of High-strength CFB-QP Forged Parts by Stepwise Water Quenching
- Regional Technological Institute, University of West Bohemia in Pilsen, Univerzitní 22, 306 14 Plzeň. Czech Republic
The forging industry, and the production of high-strength forged parts in particular, saw no substantial progress in recent decades. High-strength parts continued to be made of well-tried steel grades which meet the economic and environmental production requirements, using mainly the conventional quenching and tempering. However, the latest findings in physical metallurgy of higher-silicon steels suggest that high-strength forgings can also be obtained by producing bainitic and martensitic microstructures. The first are of the CFB (carbide-free bainite) type and the latter comprise the QP (quenching-partitioning) microstructure. At greatly reduced processing costs, properties comparable to tempered martensite can thus be attained.
Keywords: CFB-QP forgings, bainite, QP martensite, retained austenite, TRIP effect
Grants and funding:
Project LO1502 ‘Development of the Regional Technological Institute‘ under the auspices of the National Sustainability Programme I of the Ministry of Education of the Czech Republic aimed to support research, experimental development and innovation.
Published: December 1, 2019 Show citation
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