Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel

Juho Lotta, Katri Honkanen, Juha Lagerbom, Simo-Pekka Hannula

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

Results from microstructural study of Pulsed Electric Current Sintering (PECS) of gas-atomized Ultra-High Carbon Steel (UHCS) powder (1.8 % C, 1.8% Al, 1.4 % Cr) are presented. Microstructural characterization, as well as density and hardness measurements, was carried out to evaluate the resulting microstructures and to establish relationships between the processing conditions and the microstructure. In most of the cases, the microstructure featured a fine and uniform carbide structure in a matrix consisting of pearlite. Sintering temperature had the strongest influence over densification and microstructure, while changes in heating rate or the length of the dwell stage only resulted in minor microstructural changes. On the other hand, considerable microstructural changes were achieved by carrying out cyclic heat treatments (post-sintering) by utilizing the PECS equipment. Cyclic heat treatment across the A1 temperature was found to produce high content of very fine carbides.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013
Place of PublicationBremen
Pages1-6
Publication statusPublished - 2013
MoE publication typeNot Eligible
Event5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013 - Bremen, Germany
Duration: 23 Sep 201325 Sep 2013

Conference

Conference5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013
Abbreviated titleSDMA 2013
CountryGermany
CityBremen
Period23/09/1325/09/13

Fingerprint

Spark plasma sintering
Carbon steel
Microstructure
Gases
Carbides
Sintering
Heat treatment
Pearlite
Heating rate
Densification
Hardness
Powders
Temperature
Processing

Keywords

  • powder
  • gas atomization
  • SPS

Cite this

Lotta, J., Honkanen, K., Lagerbom, J., & Hannula, S-P. (2013). Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel. In Proceedings: 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013 (pp. 1-6). Bremen.
Lotta, Juho ; Honkanen, Katri ; Lagerbom, Juha ; Hannula, Simo-Pekka. / Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel. Proceedings: 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013. Bremen, 2013. pp. 1-6
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title = "Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel",
abstract = "Results from microstructural study of Pulsed Electric Current Sintering (PECS) of gas-atomized Ultra-High Carbon Steel (UHCS) powder (1.8 {\%} C, 1.8{\%} Al, 1.4 {\%} Cr) are presented. Microstructural characterization, as well as density and hardness measurements, was carried out to evaluate the resulting microstructures and to establish relationships between the processing conditions and the microstructure. In most of the cases, the microstructure featured a fine and uniform carbide structure in a matrix consisting of pearlite. Sintering temperature had the strongest influence over densification and microstructure, while changes in heating rate or the length of the dwell stage only resulted in minor microstructural changes. On the other hand, considerable microstructural changes were achieved by carrying out cyclic heat treatments (post-sintering) by utilizing the PECS equipment. Cyclic heat treatment across the A1 temperature was found to produce high content of very fine carbides.",
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Lotta, J, Honkanen, K, Lagerbom, J & Hannula, S-P 2013, Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel. in Proceedings: 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013. Bremen, pp. 1-6, 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013, Bremen, Germany, 23/09/13.

Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel. / Lotta, Juho; Honkanen, Katri; Lagerbom, Juha; Hannula, Simo-Pekka.

Proceedings: 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013. Bremen, 2013. p. 1-6.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

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AU - Lotta, Juho

AU - Honkanen, Katri

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N2 - Results from microstructural study of Pulsed Electric Current Sintering (PECS) of gas-atomized Ultra-High Carbon Steel (UHCS) powder (1.8 % C, 1.8% Al, 1.4 % Cr) are presented. Microstructural characterization, as well as density and hardness measurements, was carried out to evaluate the resulting microstructures and to establish relationships between the processing conditions and the microstructure. In most of the cases, the microstructure featured a fine and uniform carbide structure in a matrix consisting of pearlite. Sintering temperature had the strongest influence over densification and microstructure, while changes in heating rate or the length of the dwell stage only resulted in minor microstructural changes. On the other hand, considerable microstructural changes were achieved by carrying out cyclic heat treatments (post-sintering) by utilizing the PECS equipment. Cyclic heat treatment across the A1 temperature was found to produce high content of very fine carbides.

AB - Results from microstructural study of Pulsed Electric Current Sintering (PECS) of gas-atomized Ultra-High Carbon Steel (UHCS) powder (1.8 % C, 1.8% Al, 1.4 % Cr) are presented. Microstructural characterization, as well as density and hardness measurements, was carried out to evaluate the resulting microstructures and to establish relationships between the processing conditions and the microstructure. In most of the cases, the microstructure featured a fine and uniform carbide structure in a matrix consisting of pearlite. Sintering temperature had the strongest influence over densification and microstructure, while changes in heating rate or the length of the dwell stage only resulted in minor microstructural changes. On the other hand, considerable microstructural changes were achieved by carrying out cyclic heat treatments (post-sintering) by utilizing the PECS equipment. Cyclic heat treatment across the A1 temperature was found to produce high content of very fine carbides.

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Lotta J, Honkanen K, Lagerbom J, Hannula S-P. Pulsed Electric Current Sintering of Gas Atomized Ultrahigh Carbon Steel. In Proceedings: 5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013. Bremen. 2013. p. 1-6