Abrasive resistance of HVOF thermally sprayed coatings based on alloys and cermets compared to nitrided stainless steel

• Autorzy: Cesanek Z. , Schubert J.
• Języki publikacji: EN

Abstrakty

EN

Purpose: This work is focused on the abrasion resistance comparison of alloy and cermet based coatings with nitrided stainless steel. Design/methodology/approach: The coatings deposited on the steel substrates were subjected to the abrasion test according to a modified ASTM G-65 (Rubber Wheel/Dry Sand Abrasion Test). Al2O3 abrasive sand with the granularity of 212-250 μm was used as an abrasive material. Stellite 6, NiCrBSi, Hastelloy C-276, Cr3C2-NiCr, Cr3C2-CoNiCrAlY and TiMoCN-Ni powders were used to prepare several set of samples. Findings: The obtained results show that the abrasion resistance is not directly proportional to the hardness. The difference in microstructure between cermet and alloy bases coatings in relation to their wear mechanism plays an important role. Research limitations/implications: The HVOF thermal spraying technology (High Velocity Oxygen Fuel) is commonly used as a component surface protection against abrasive wear. Alloy and cermets based coatings therefore meet the requirements for high abrasion resistance. Originality/value: The current trend in increase of operating temperature and steam parameters to improve steam turbine performance results in the operating temperatures which are close to the nitriding temperatures of steels limiting the use of this technology. For these reasons, the demand for alternative ways of functional surface protection is increasing, in particular to increase the abrasion resistance of component surfaces operating at high temperatures.

Słowa kluczowe

EN

HVOF; coating; abrasion resistance; wear resistance; ASTM G-65; nitriding

PL

HVOF; powłoka; odporność na ścieranie; ASTM G-65; azotowanie

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2014
• Tom: Vol. 67, nr 1
• Strony: 18--23
• Opis fizyczny: Bibliogr. 9 poz.

Twórcy

autor

Cesanek Z.

• University of West Bohemia, Univerzitni 8, 306 14 Plzeň, Czech Republic

autor

Schubert J.

• University of West Bohemia, Univerzitni 8, 306 14 Plzeň, Czech Republic

Bibliografia

• [1] P. Pawlowski, The Science and Engineering of Thermal Spray Coatings, Whiley Chichester, UK, 1995, 327.
• [2] F. Zahálka, R. Enžl, ŽárovČstĜíkané povlaky - moderní technologie povrchových ochran, Technik, 2005.
• [3] T.S. Sidhu, S. Prakash, R.D. Agrawal, Characterizations and Hot Corrosion Resistance of Cr3C2-NiCr Coating on Ni-base Super alloys in an Aggressive Environment, Journal of Thermal Spray Technology 15/4 (2006) 811-816
• [4] Flame Spray Technologies, Powders, April 2008, http://www.fst.nl/ [online], [17. 1. 2013], http://www.fst.nl/upload/documents/PDF%20for%20download/FST_Powders_1105.pdf
• [5] T.S. Sidhu, S. Prakash, R.D. Agrawal, A Comparative Study of Hot Corrosion Resistance of HVOF Sprayed NiCrBSi and Stellite-6 Coated Ni-Base Superalloy at 900°C, Materials Science and Engineering: A445-446 (2007) 210-218.
• [6] J.M. Miguel, J.M. Guilemany, S. Vizcaino, Tribological study of NiCrBSi coating obtained by different processes, Tribology International 36/3 (2003) 181-187.
• [7] T.S. Eyre, Wear characteristic of metals, Tribology International 9/5 (1976) 203-212.
• [8] A.N.J. Stevenson, I. Hutchings, Development of the dry sand/rubber wheel abrasion test, Wear 195 (1996) 232-240.
• [9] ASTM Standard G65 – 04, 2010, "Standard Test Method for Measuring Abrasion Using the Dry Sand/Rubber Wheel Apparatus," ASTM International, West Conshohocken, PA, 2010, DOI: 10.1520/G0065-04R10