SOLID PARTICLE EROSION RESISTANCE OF HVAF-SPRAYED WC-10Co-4Cr COATING ON CA6NM STEEL

Anurag Hamilton, Ashok Sharma and Upender Pandel
Additional contact information
Anurag Hamilton: Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India
Ashok Sharma: Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India
Upender Pandel: Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur 302017, India

Surface Review and Letters (SRL), 2017, vol. 24, issue Supp01, 1-14

Abstract: In the present investigation, WC-10Co-4Cr coating was deposited by high velocity air-fuel (HVAF) process on CA6NM hydro turbine steel. A detailed microstructural and phase compositional study was carried out on the coating. Mechanical properties of the coating were also evaluated. WC-10Co-4Cr coating showed a homogeneous, well-bonded structure with low porosity, which is mainly attributed to less decarburization of WC. Erosion resistance of the coating was evaluated by air jet erosion tester at three different impingement angles (30∘, 60∘ and 90∘) for 35 and 70m/s impact velocities. The FESEM micrographs were taken, before and after erosion tests, to determine the erosion mechanism. The test results revealed that the coating protects the substrate at 30∘, 60∘ and 90∘ impingement angles. At 70m/s impact velocity, uncoated and coated steel showed higher cumulative volume loss than in the case of 35m/s impact velocity. It was observed that uncoated steel showed a ductile behavior during erosion and WC-10Co-4Cr coating showed mixed (ductile and brittle) mode of fracture during erosion.

Keywords: CA6NM steel; HVAF; erosion resistance (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.worldscientific.com/doi/abs/10.1142/S0218625X18500117
Access to full text is restricted to subscribers

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:wsi:srlxxx:v:24:y:2017:i:supp01:n:s0218625x18500117

Ordering information: This journal article can be ordered from

DOI: 10.1142/S0218625X18500117

Access Statistics for this article

Surface Review and Letters (SRL) is currently edited by S Y Tong

More articles in Surface Review and Letters (SRL) from World Scientific Publishing Co. Pte. Ltd.
Bibliographic data for series maintained by Tai Tone Lim ().