Effect of tempering on the impact-abrasive and abrasive wear resistance of ultra-high strength steels
Haiko, Oskari; Valtonen, Kati; Kaijalainen, Antti; Uusikallio, Sampo; Hannula, Jaakko; Liimatainen, Tommi; Kömi, Jukka (2019-10-23)
Oskari Haiko, Kati Valtonen, Antti Kaijalainen, Sampo Uusikallio, Jaakko Hannula, Tommi Liimatainen, Jukka Kömi, Effect of tempering on the impact-abrasive and abrasive wear resistance of ultra-high strength steels, Wear, Volumes 440–441, 2019, 203098, ISSN 0043-1648, https://doi.org/10.1016/j.wear.2019.203098
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe202002044537
Tiivistelmä
Abstract
Tempering is an essential part in the fabrication of ultra-high strength steels and it is also widely applied in the processing of wear-resistant steels. In this paper, the effects of different tempering temperatures on the impact-abrasive and abrasive wear properties of martensitic ultra-high strength steels were studied. A novel press-hardening steel with carbon content of 0.4 wt% was received in hot-rolled condition and further austenitized, water-quenched and tempered for 2 h at different temperatures (150–400 °C). Tensile strength values up to 2200MPa and hardness exceeding 650HV were measured. Wear testing was done with impact-abrasive impeller-tumbler and abrasive dry-pot application-oriented test methods simulating mining and mineral handling environments. A laboratory rolled 600HB steel and a commercial 500HB grade wear-resistant steel were included for comparison. The wear surfaces and cross-sections of the samples were thoroughly characterized. Both testing methods produced highly deformed surface layers and strong work-hardening. Wear performance was mainly controlled by the initial hardness of the steels, but differences were found in the highly work-hardened surfaces of the steels.
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