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A double-sliding test was performed in a titanium alloy; the tribo-layers and their function were investigated. The tribo-oxide layers of titanium alloy were proved to possess the protective function. Tribo-layers as mechanically mixed layers were always noticed to form on the titanium alloy; their composition, phase and status changed with sliding conditions. Tribo-layers of the titanium alloy were...
In order to improve the elevated-temperature wear resistance of steels, an aluminized coating consisting of FeAl and Fe3Al was prepared on AISI H13 steel by hot-dip aluminizing and subsequently high-temperature diffusion. Dry sliding wear tests were conducted for the aluminized and uncoated AISI H13 steel against AISI M2 steel at room temperature and 600°C, respectively. Compared with the uncoated...
In order to improve its poor tribological performance, an oxidation/diffusion coating on Ti–6Al–4V alloy was prepared by thermal oxidation and subsequent vacuum diffusion. The wear characteristics of the coating were explored on a pin-on-disc high temperature wear tester under 50–300N at 25–600°C. The oxidation/diffusion coating with a thickness of 250μm was composed of TiO2, Ti2O and Ti2.5O3 and...
Dry sliding wear tests were performed for Ti–6Al–4V alloy under a load of 50–250N at 25–500°C on a pin-on-disk elevated temperature tester. Worn surfaces and subsurfaces were thoroughly investigated for the morphology, composition and structure of tribo-layers. Ti–6Al–4V alloy could not be considered to possess poor wear resistance at all times, and presented a substantially higher wear resistance...
Wear characteristics of a spheroidal graphite cast iron and a carbon steel were studied under atmospheric conditions at 25–400°C. The spheroidal graphite cast iron presented obviously different wear behaviors from the carbon steel, which may be attributed to the presence of graphite. With an increase of ambient temperature, tribo-oxides of carbon steel substantially increased and its substrate softened,...
Dry sliding wear tests at 25–400°C were performed for 45, 4Cr5MoSiV1 and 3Cr13 steels; the relations between oxidative wear and Cr content of steels were explored. The low and medium-Cr steels had a substantially lower wear rate and increasing tendency than the high-Cr steel at 25–200°C, but the contrary case occurred at 400°C. With an increase of ambient temperature, the wear rate of the low and...
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