Surface degradation of nitrided hot work tool steels under repeated impact-sliding contacts: Effect of compound layer

M. Kaba, M. Altay, E. Akyildiz, F. Muhaffel, S. Ozkurt, E. Atar, M. Baydogan, H. Cimenoglu*

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12 Atıf (Scopus)

Özet

Wear behaviour of quenched and tempered (QT) hot work tool steels (Uddeholm QRO90) was investigated against SAE 52100 grade bearing steel balls after gas nitriding using a dedicated laboratory scale impact-sliding wear test rig. Gas nitriding was employed in a fluidised bed reactor under two alternative regimes: i. “High Temperature Nitriding (HTN)” carried out at 510 °C and ii. “Low Temperature Nitriding (LTN)” carried out at ≤ 400 °C. The HTN process resulted in the formation of ∼2 μm thick external compound layer, whereas the LTN processed steels were free of any surface compound layer formation. After the impact-sliding wear tests employed at room temperature (RT), the prevailing wear mechanisms of the examined steels were assessed as tribo-oxidation and fatigue wear. The testing at 600 °C induced different wear mechanisms for the HTN and the LTN steels. While tribo-oxidation and fatigue wear were preserved for the HTN steel, plastic deformation dominated the wear that progressed on the compound layer free surface of the LTN steel. Impact-sliding wear testing at 600 °C showed that the wear rate of LTN > HTN steels, as opposed to the wear rate at RT where wear rate of HTN > LTN.

Orijinal dilİngilizce
Makale numarası204300
DergiWear
Hacim498-499
DOI'lar
Yayın durumuYayınlandı - 15 Haz 2022

Bibliyografik not

Publisher Copyright:
© 2022 Elsevier B.V.

Finansman

This investigation has been made under the funding granted by The Scientific and Technological Research Council of Turkey [Grant number TEYDEB-5160013 ]. Dr. P. A. Dearnley is acknowledged for his scientific comments. Authors would like to express their thanks to Dr. A. Motallebzadeh for the Raman analysis.

FinansörlerFinansör numarası
Türkiye Bilimsel ve Teknolojik Araştirma KurumuTEYDEB-5160013

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