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.
|Title of host publication||Proceedings|
|Subtitle of host publication||5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013|
|Place of Publication||Bremen|
|Publication status||Published - 2013|
|MoE publication type||Not Eligible|
|Event||5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013 - Bremen, Germany|
Duration: 23 Sep 2013 → 25 Sep 2013
|Conference||5th International Conference on Spray Deposition and Melt Atomization, SDMA 2013|
|Abbreviated title||SDMA 2013|
|Period||23/09/13 → 25/09/13|
- gas atomization
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).