Alloying of TiC-FeCr cermet in manganese vapor

Conventional vacuum sintering is not suitable for producing manganese containing cermets because of the physical-chemical properties of manganese, high vapor pressure, combined with high sintering temperature of cermets (1400-1600 °C). Sintering in Mn-rich microatmosphere does not only prevent Mn lo...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2021-05, Vol.1140 (1), p.12043
Main Authors: Kolnes, M, Tarraste, M, Kübarsepp, J, Juhani, K, Viljus, M
Format: Article
Language:English
Subjects:
Alloying
Cermets
Chemical properties
Chromium steel
Chromium steels
Fracture toughness
Indentation
Manganese
Mechanical properties
Sinterability
Sintering
Surface layers
Vacuum sintering
Vapor pressure
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Conventional vacuum sintering is not suitable for producing manganese containing cermets because of the physical-chemical properties of manganese, high vapor pressure, combined with high sintering temperature of cermets (1400-1600 °C). Sintering in Mn-rich microatmosphere does not only prevent Mn loss, but also enables additional in-situ alloying of the binder phase during sintering. We studied alloying of TiC-based cermet bonded with high chromium steel during sintering in Mn-rich atmosphere. Sintering in manganese vapor was found to increase sinterability of the TiC-FeCr cermet, resulting in the formation of ∼1 mm thick Mn-rich surface layer with homogeneous microstructure while the core region of the material remained unaffected. This core region exhibited highly increased Mn content and competitive mechanical properties – hardness of ∼1200 HV30 and indentation fracture toughness of ∼13 MPa*m 1/2 . In addition, an unusual ε-type martensitic phase was observed in the surface layer.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/1140/1/012043