Parameters Controlling the Oxide Reduction during Sintering of Chromium Prealloyed Steel
Joint Authors
Hryha, Eduard
Dudrová, Eva
Hrubovčáková, Monika
Kabátová, Margita
Harvanová, Jarmila
Source
Advances in Materials Science and Engineering
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-10-09
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Temperature intervals of oxide reduction processes during sintering of the Fe-3%Cr-0.5%Mo prealloyed powder using continuous monitoring of processing-exhaust gas composition (CO, CO2, and H2O) were identified and interpreted in relation to density (6.5–7.4 g/cm3), sintering temperature (1120 and 1200°C), heating and cooling rates (10 and 50°C/min), carbon addition (0.5/0.6/0.8%), type (10%H2-N2, N2), and purity (5.0 and 6.0) of the sintering atmosphere.
The progress in reduction processes was evaluated by oxygen and carbon contents in sintered material and fracture strength values as well.
Higher sintering temperature (1200°C) and density <7.0 g/cm3 resulted in a relative decrease of oxygen content by more than 80%.
The deterioration of microclimate purity of inner microvolumes of compacts shifted the thermodynamic equilibrium towards oxidation.
It resulted in a closing of residual oxides inside interparticle necks.
The reducing ability of the N2 atmosphere can be improved by sintering in a graphite container.
High density of 7.4 g/cm3 achieved by double pressing indicated a negative effect on reduction processes due to restricted replenishment of the microclimate atmosphere with the processing gas.
In terms of strength properties, carbon content should not be higher than ~0.45%.
American Psychological Association (APA)
Hrubovčáková, Monika& Dudrová, Eva& Hryha, Eduard& Kabátová, Margita& Harvanová, Jarmila. 2013. Parameters Controlling the Oxide Reduction during Sintering of Chromium Prealloyed Steel. Advances in Materials Science and Engineering،Vol. 2013, no. 2013, pp.1-16.
https://search.emarefa.net/detail/BIM-498184
Modern Language Association (MLA)
Hrubovčáková, Monika…[et al.]. Parameters Controlling the Oxide Reduction during Sintering of Chromium Prealloyed Steel. Advances in Materials Science and Engineering No. 2013 (2013), pp.1-16.
https://search.emarefa.net/detail/BIM-498184
American Medical Association (AMA)
Hrubovčáková, Monika& Dudrová, Eva& Hryha, Eduard& Kabátová, Margita& Harvanová, Jarmila. Parameters Controlling the Oxide Reduction during Sintering of Chromium Prealloyed Steel. Advances in Materials Science and Engineering. 2013. Vol. 2013, no. 2013, pp.1-16.
https://search.emarefa.net/detail/BIM-498184
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-498184