Electron microscopy study of carbides precipitated during destabilization and tempering heat treatments of 25 wt.%Cr-0.7 wt.%Mo high chromium cast irons.
- Resource Type
- Academic Journal
- Authors
- Wiengmoon A; Department of Physics, Faculty of Science, Naresuan University, Phitsanulok, 65000, Thailand. Electronic address: ampornw@nu.ac.th.; Pearce JTH; Panyapiwat Institute of Management, Nonthaburi, 11120, Thailand.; Nusen S; Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.; Chairuangsri T; Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai, 50200, Thailand.
- Source
- Publisher: Pergamon Press Country of Publication: England NLM ID: 9312850 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1878-4291 (Electronic) Linking ISSN: 09684328 NLM ISO Abbreviation: Micron Subsets: PubMed not MEDLINE; MEDLINE
- Subject
- Language
- English
The effect of a 0.7 wt.%Mo addition on the microstructure and hardness of a heat treated 25 wt.%Cr-2.4 wt.%C cast iron has been studied via comparison with a Mo free reference 25 wt.%Cr-2.4 wt.%C iron. Destabilization led to precipitation of M 7 C 3 and M 23 C 6 secondary carbides in the reference iron, whereas M 23 C 6 secondary carbide was found in the iron with 0.7 wt.%Mo. Tempering resulted in additional secondary carbide precipitation and formation of ferrite. Secondary hardening was found in the iron with 0.7 wt.%Mo. For the destabilized + tempered condition the macro-hardness of the iron with 0.7 wt.%Mo addition was higher than the reference iron due to a finer and denser distribution of secondary-carbides.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)