Effect of carburizing and annealing processes in improving the Ni/WC–Co adhesion strength

Abstract

Heat treatment processes have a positive impact in improving the adhesion strength of different interlayer/substrate materials. However, information regarding the effect of these processes in enhancing the adhesion strength of an electroplated nickel interlayer on tungsten carbide substrate for diamond deposition is lacking. In this study, the effect of carburizing and annealing process conditions in enhancing the adhesion strength of the electroplated nickel interlayer was investigated. The heat treatment processes were designed and modeled by the design of experiments technique. The heat-treated specimens were characterized by the field-emission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction techniques. The adhesion of the interlayer before and after the heat treatment was assessed by the scratch test. The results show that the adhesion of the electroplated nickel interlayer was remarkably improved by both processes. The mathematical models for predicting the adhesion strength of the carburized and annealed nickel interlayer within the specified ranges were developed. The maximum adhesion strength of 30 N was obtained from the nickel interlayer annealed at the highest process condition of temperature and time.

Effects of High Temperature Immersion on Interfacial Adhesion between Polypropylene and Nickel Substrate

“…Because of the significant difference in thermal expansion coefficient and elastic modulus between polymer and metal, as summarized in Table , volume dilation of PP strip would be restricted by the Ni substrate, which generated the compression stress on Ni substrate. Previously reported works certified the compression stress derived from the heating treatment that enhanced the interfacial strength of different interlayer/substrate materials due to the diffusion. − Finite element methods (FEM) modeling could be utilized to certify the appearance of compression stress. The simulation procedure was performed within ABAQUS (version 6.14).…”

Effect of Ti2SnC mass fraction on microstructure and friction–wear performance of laser cladded Ni–WC coatings under WS2 lubrication condition

“…4 At present, laser cladding (LC) has been widely used in the hardness improvement of plastic forming molds due to its low dilution rate, high hardness, and wear resistance. 5 Among many alloy powders, Ni-based powder with good self-melting characteristic is widely applied for laser cladding (LC), [6][7][8] however, it can not meet the higher requirements of plastic forming molds. As a kind of ceramic, WC is usually used to reinforce the Ni-based coating, which is because the WC with high hardness can form composite with the Ni-based coating.…”