University of Oulu

Haiko, O., Somani, M., Porter, D., Kantanen, P., Kömi, J., Ojala, N., & Heino, V. (2018). Comparison of impact-abrasive wear characteristics and performance of direct quenched (Dq) and direct quenched and partitioned (Dq&p) steels. Wear, 400–401, 21–30.

Comparison of impact-abrasive wear characteristics and performance of direct quenched (DQ) and direct quenched and partitioned (DQ&P) steels

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Author: Haiko, Oskari1; Somani, Mahesh1; Porter, David1;
Organizations: 1University of Oulu, Faculty of Technology, Materials Engineering and Production Technology, POB 4200, 90014 Oulu, Finland
2Tampere University of Technology, Department of Materials Science, Tampere Wear Center, POB 589, 33101 Tampere, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 3.1 MB)
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Language: English
Published: Elsevier, 2018
Publish Date: 2023-03-16


The recently developed method of direct quenching and partitioning (DQ&P) was utilized to produce ultra-high strength martensitic steels with retained austenite. The DQ&P steels have high surface hardness while retaining good impact toughness and elongation values. The toughness and elongation properties are attributed to the retained austenite which is stabilized in the DQ&P process. The aim was to study if DQ&P processing could be utilized for improved abrasive wear resistance. Two medium-carbon (0.3%) chemical compositions were selected with varying amounts of silicon, aluminum and chromium. The processing route for DQ&P involved interrupted water quenching with two different quench stop temperatures (TQ) (175 and 225 °C). Direct quenched (DQ) variants were also produced for comparison of both mechanical properties and wear characteristics. Compared to the DQ treatment, improved impact toughness and elongation to fracture were achieved with the DQ&P treatment while initial strength and hardness was reduced. An impeller-tumbler testing device was used to measure the impact-abrasive wear performance of the different experimental microstructures and compared with that of a reference commercial 500 HB steel. No advantage of the increased ductility of the DQ&P steels was apparent; wear resistance was shown to only correlate with the initial surface hardness of the steels.

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Series: Wear. An international journal on the science and technology of friction, lubrication and wear
ISSN: 0043-1648
ISSN-E: 1873-2577
ISSN-L: 0043-1648
Volume: 400-401
Pages: 21 - 30
DOI: 10.1016/j.wear.2017.12.016
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: The research described has been done within the Breakthrough Steels and Applications (BSA) program of DIMECC Ltd. We gratefully acknowledge financial support from the Finnish Funding Agency for Technology and Innovation (Tekes) and the companies participating in the above programs. The corresponding author would also like to express his gratitude for the support provided by the University of Oulu Graduate School through the Advanced Materials Doctoral Program (ADMA-DP). Jenny and Antti Wihuri Foundation and Tauno Tönning Foundation are also acknowledged for their financial support to the corresponding author.
Copyright information: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http:/