Conveyor belts reinforced with steel cords fail during operation for various of reasons, including corrosion of the cords from hostile solutions, impact fracture of the cords, splice failure, wear and longitudinal tears. Though steel cord belts are generally confined to applications requiring high belt tensions, they also have applications as high-lift short belts for in-plant handling of parti...

Abstract In general, Physical Vapor Deposition (PVD)-TiN coated High Speed Steel (HSS) endmills used to machine carbon steels can perform better at high cutting speeds compared with uncoated tools resulting in better surface finish and longer tool life. Flank wear is believed to be the main wear type that leads to shorten the life of these cutting tools. In this study, the roles of the coating ...

Roller cone drill bits are used in drilling larger diameter wells. The efficiency of the roller bit depends on wear rate materials that forms teeth, which crushes rock at bottom well. To prevent excessive wear, research has largely focused study and determination abrasion-resistant materials. In our work, we investigated mechanism a whose wear-resistant teeth protected by hard metal coating wel...

Chromium carbide – nickel chromium powder Cr3C2-25wt.NiCr was plasma sprayed by a water-stabilized system WSP®. A series of experiments with variable feeding distance was carried out. Basic characterization of coatings was done by XRD, SEM and light microscopy plus image analysis. Microhardness was measured on polished cross sections. The main focus of investigation was on resistances against w...

It is generally known that the friction and wear between polymers and polished steel surfaces has a special character, the behaviour to friction and wear of a certain polymer might not be valid for a d ifferent polymer, moreover in dry friction conditions. In this paper, the reaction to wear of certain polymers with short glass fibres (polyamide + 20% glass fibres, polyamide + 30% glass fibres ...

Particulate wear debris can induce the release of bone-resorbing cytokines from cultured macrophages and fibroblasts in vitro, and these mediators are believed to be the cause of the periprosthetic bone resorption which leads to aseptic loosening in vivo. Much less is known about the effects of particulate debris on the growth and metabolism of osteoblastic cells. We exposed two human osteoblas...

Chromium oxide coatings are chemically inert, have high mechanical strength, hardness and good optical characteristics; therefore, they have been widely used in many applications including corrosion protection, wear resistance, electronics, and optics. Cr2O3 is well suited for wear resistance applications, as it is one of the hardest oxides with 29.5 GPa hardness. Several deposition techniques ...

Bypass tests of Ø219×8mm 13KhFA, 08KhMFChA, 20-ksh (steel 20 corrosion resistant cold resistant) and Grade steel piping spools were carried out on an oil-gathering line one the oilfields in Stavropol region. Tubing condition was checked after 7, 15, 17 23 months testing. After two years service no change found mechanical properties base metal or weldments manufactured from 13KhFA 08KhMFChA stee...