Characterization and residual stress analysis of wear resistant Mo thermal spray-coated steel gear wheels

Wear behaviour of thermal flame sprayed FeCr coatings on plain carbon steel substrate

“…As explained in Refs. [2,13,14] in details, in Ni-based bond coating, Ni, Cr and Ti promote resistance to oxidation and high temperature corrosion and increases the hardness of the coating by forming very hard precipitates. The low Al content provides formation of hard film of such as discontinuous ␣-Al 2 O 3 in the bond layer.…”

“…All these techniques permit the deposition of coating materials generally ductile and improved corrosion and wear resistance. Nevertheless, more traditional electric arc wire spray and combustion flame spray are still widely used [2]. The flame spray deposition technique has a number of disadvantages compared to the other spraying process, such as plasma spray, detonation gun and HVOF, including a bigger grain size microstructure, pore size and crack length, but it also has distinct advantages, such as its being more economical, easier to handle and more adapt- * Corresponding author.…”

“…On the other hand, in order to avoid undesired chemical transformations, excess heating of the samples should be prevented by keeping the kinetic fraction of the particle energy predominant with respect to the heat they transport. In flame spray processing of metallic powders, the formation of high oxide content phases leads to better tribological characteristics and the oxide content (likely to increase with increasing spray distance) results in harder coatings with better anti-wear characteristics (especially under low contact pressure conditions) [2].…”

Finite element analysis of frictional contact of elastic solids with thin and moderately thick coatings

“…Spur gears are widely used in industry and coated gears are studied by some researchers (Bruno et al, 2006;Martins et al, 2006). The contact displacements and stress characteristics of spur gears can be changed by coating.…”

“…Numerical techniques, such as the finite element method (FEM) and boundary element method (BEM), are also widely used in the analysis of contact mechanic problems with thin coating (Komvopoulos, 1988;Hong and Saka, 1991;Djabella and Arnell, 1993;Sun et al, 1995;Njiwa et al, 1998;Diao and Kandori, 2006). The thin-coating technique is generally used in structural components such as gears, bearings, machine tools, and artificial hip joints to improve their surface mechanical properties (Sen et al, 1989;Liu et al, 2003;Yonekura et al, 2005;Bruno et al, 2006;Martins et al, 2006). Therefore, in this paper, thin-coated joints such as ball and socket, ball on a flat plate, roller on a guide, and spur gear are analysed by FEM.…”