Residual Stress in Ground WC-Co Coatings
نویسندگان
چکیده
High velocity oxygen fuel (HVOF) spray technique is one of the leading technologies that have been proposed as an alternative to the replacement of electrolytic hard chromium plating in a number of engineering applications. In this study, WC-Co powder was coated on AISI1045 steel using high velocity oxy fuel (HVOF) method. The sinψ method was used to evaluate the through thickness residual stress by means of XRD after mechanical layer removal process (only grinding). The average of through thickness residual stress using X-Ray diffraction was -400 MPa. Keywords—Grinding, HVOF, Thermal spray, WC-Co.
منابع مشابه
Experimental and Numerical Study of Residual Stress in the WC-12Co HVOF Sprayed Coatings
Thermally sprayed coatings are intrinsically associated with residual stresses in the deposits. These stresses are varied in nature and magnitude, and have a pronounced effect on the mechanical behavior of the system. In the current study, WC-12Co coatings were deposited using HVOF thermal spraying. The sin2ψ method was used to evaluate the through thickness residual stress by means ...
متن کاملEffect of Carbide Particle Size on the Microstructure, Mechanical properties, and Wear Behavior of HVOF-sprayed WC-17% Co Coatings
This study investigates the effect of carbide particle size on the microstructure, mechanical properties, and abrasive wear resistance of WC-17%Co HVOF-sprayed coatings. The characteristics of WC-1, WC-2, and WC-3 coatings with carbide sizes of 1 µm, 0.9 µm, and 0.5 µm, respectively, were also investigated. WC-1 coating experienced the maximum carbon loss of 42%, while WC-2 and WC-3 coatings un...
متن کاملDynamic Torsion Testing of Nanocrystalline Coatings Using High-Speed Photography and Digital Image Correlation
The strength and ductility of microcrystalline and nanocrystalline tungstsen carbide–cobalt (WC–Co) cermets have been evaluated by employing a stored energy Kolsky bar apparatus, high-speed photography and digital image correlation. The test specimens were thin-walled tubular Al7075-T6 substrates 250 μm thick, coated with a 300 μm thick microcrystalline or nanocrystalline WC–Co layer with an av...
متن کاملAnnealing effect on the mechanical properties of ultrafine WC–Co materials
In dry machining, the tool-chip interface temperature is a critical factor affecting the engineering performance of WC–Co tools. As the temperature variation of the cutting tool in dry machining is similar to that in annealing process, the effect of tool-chip interface temperature on the mechanical properties of cutting tool materials in dry machining can be studied by means of annealing experi...
متن کاملLow stressed functional diamond films
Advantages Technology allows for improved diamond deposition process, which results in stronger adhesion. Improved adhesion of the film produces lower stresses to thereby increase the drill lifetime. When compared to untreated drill bit, our drill bit was able to drill over 100 holes, whereas the untreated only drilled 40 holes before breaking. o Increased durability over 50% Diamond film...
متن کامل