In this study carburizing and boronizing processes were applied to powder metallurgy steel specimens and the mechanical and tribological properties of the substrate and coatings were evaluated under various process conditions. The specimens, made from industrial test pieces, were carburized in a powder pack for a duration of 2-5 hrs at 850-950 ˚C. Similar specimens were pack boronized for 4 hr...

The aim of this research was to study the wear behavior of 42CrMo4 steel/ZrO2 composite with 10 and 30 ppi performed ceramic and compare it with the un-reinforced steel under different applied loads. The composite specimens were obtained by pressureless infiltration of the melt into a preformed ceramic of zirconium oxide. The effect of applied load on the specimens wear behavior was ...

In this paper, Fe-Cr-C-N-Al-Y wear-resistant surfacing alloy was prepared by open-arc with self-shielded flux-cored wire. The wear properties of the were analyzed using an MLS-23 rubber wheel wet sand tester. phase composition and microstructure X-ray diffraction, scanning electron microscope, backscatter diffraction transmission microscope; strengthening mechanism discussed. results show that ...

An experimental investigation into material transfer and wear has been performed for the case of a ferrite probe sliding at high speeds (between 25 cm/set and 1250 cm/set) and low loads (10 gm) on a steel disk, a nickel plated disk, and a polymercoated disk, the latter containing finely dispersed abrasive particles. Autoradiographic methods together with microdensitometer analysis have been app...

This work explores the effect of surface modification of stainless steel with a carbon nitride (CNx) film, under sliding wear of the UHMWPE/steel. Wettatibility of CNx coatings is assessed by means of the sessile drop method using two different liquid media. Microhardness and stiffness of CNx coatings are estimated by depth-sensing indentation. The sliding performance of UHMWPE against stainles...

Electrochemical composite coatings allow successfully solving many practical problems of surface-hardening structural parts and their tooling components, as well renewing fast-wearing components. chromium-matrix are used to enhance the thermal wear resistance steel articles operating in friction conditions under increased temperatures, but low shock loads. This paper presents results obtained f...

Concentrated Solar Energy (CSE) processing is considered a promising renewable energy source technique for elaborating thick, wear-resistant claddings onto metallic surfaces of large dimensions that are expected to operate in heavy duty applications, such as excavator shovels, mineral crushers, etc. However, the prediction surface effects on microstructure and properties main construction base ...

Abstract The study constitutes an analysis of the durability dies used in first operation producing valve forgings from chromium–nickel steel (NCF 3015) for motor trucks. average (subjected to standard thermal treatment and nitriding) this equals about 800 forgings. To perform in-depth effect nitrided layer thickness (0.1 mm 0.2 mm) tool material (W360 QRO90) on possibilities increasing die dur...

Ball mills are common grinding equipment in mineral processing industries. Ball wear results from three mechanisms namely impact, abrasion and corrosion. Of these, the corrosion mechanism is the least investigated, due to its chemical-electrochemical nature. Therefore, the aims of this research were to investigate the grinding chemistry influence (slurry pH, solid percentage, water chemistry an...