NDLI: Precipitation of Secondary Carbides in M2 High-Speed Steel Modified with Titanium diboride

Content Provider	Springer Nature Link
Author	Chaus, Alexander S. Dománková, Mária
Copyright Year	2012
Abstract	The precipitation of the secondary carbides in high-speed steel of AISI M2 type modified with titanium diboride has been investigated for both the cast and the heat-treated states. The primary focus was on the effect of austenitizing temperatures on the secondary carbide precipitation during tempering. Some differences in origin of the secondary carbides, as well as in their shape and size distribution, were found in the tempered microstructure for the different austenitizing temperatures. After austenitization at 1180 °C and triple tempering at 560 °C, the secondary carbide particles of a spherical shape up to 200 nm in size were identified by selected area electron diffraction as M$_{23}$C$_{6}$. After austenitization at 1220 °C, two types of the secondary carbides were found in the tempered microstructure, M$_{23}$C$_{6}$ with a size up to 200 nm and M$_{6}$C with a size up to 400 nm. In both the cases, the carbide particles were slightly angular. After austenitization at 1260 °C, only M$_{6}$C secondary carbides were revealed in the tempered microstructure, which occurred as the angular particles up to 350 nm in size. In addition, considerably finer M$_{23}$C$_{6}$ carbide particles with a size of 10-40 nm were found to precipitate in the tempered microstructure.
Starting Page	1412
Ending Page	1420
Page Count	9
File Format	PDF
ISSN	10599495
Journal	Journal of Materials Engineering and Performance
Volume Number	22
Issue Number	5
e-ISSN	15441024
Language	English
Publisher	Springer US
Publisher Date	2012-10-17
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	austenitizing high-speed steel microstructure precipitation carbides tempering Characterization and Evaluation of Materials Tribology, Corrosion and Coatings Quality Control, Reliability, Safety and Risk Engineering Design
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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