Investigating the Water Jet Erosion Performance of HVOF-Sprayed WC-10Co Coatings on 35CrMo Steel Utilizing Design of Experiments

Abstract

To enhance the surface of a material with the desired qualities for diverse applications in service, a variety of thermal and thermo-chemical surface treatment processes are used. Due to the high-velocity impact inherent in the process, high-velocity oxy-fuel (HVOF) spray is now frequently employed in industrial applications for its ability to generate a high-quality coating with appropriate hardness and low oxide content. In this investigation, a high-velocity oxy-fuel (HVOF) thermal spraying process was utilized to coat WC-10Co powders on a 35CrMo steel substrate. A water jet erosion test was also used to examine the substrate and coated samples’ erosion behavior. The erosion rate was systematically investigated using water jet variables such as the angle of impingement, water jet velocity, standoff distance, and erodent discharge. For the development of multiple regression models, experiments were performed utilizing the central composite rotatable design and the response surface methodology. The angle of impingement had the most impact on the rate of coating erosion, leading to the water jet velocity, standoff distance, and erodent discharge.

Current insights into the factors affecting the erosion behaviour of iron alloy based coating material

“…Also, varying the types of materials has a significant effect on the impact angle of erosion. Further, ductile materials are most susceptible to erosion at an impact angle of about 20°, but at a normal incidence angle, they exhibit high erosion resistance [11]. However, fragile materials are quickly destroyed when struck at an angle of 90°or higher, but when struck at a lower angle, they are impenetrable to erosion [12].…”

Experimental Study on Surface Erosion of Grade A Marine Steel by Ultrahigh-Pressure Water Jet

“…Quaisie et al [16] demonstrated through experiments that when the jet pressure is below 20 MPa, the surface forming depth and surface roughness of the water jet erosion materials increase with the pressure. Ribu et al [17] systematically investigated the erosion rate by considering water jet parameters such as the impact angle, water jet velocity, distance, and erosion flow and concluded that the impact angle has the greatest impact on the coating erosion rate and that the influencing factors include the water jet velocity, distance, and erosion flow. Zhao et al [18] investigated the erosion failure mechanism of different impact angles through an experiment on the abrasive jet erosion of 316 stainless steel and considered that the small-angle erosion was mainly plowing, while the large-angle erosion was a mostly positive collision.…”