Abstract The paper presents the research results on duplex corrosion-resistant chromium–nickel–molybdenum cast steel of GX2CrNiMoCuN 25-6-3-3 grade. aim was to determine effect soaking temperature for hyperquenching process T p , that is, 950 1200 °C, microstructure and mechanical properties, is UTS tensile strength, yield HB Brinell hardness, elongation EL impact strength KV steel, under indus...

This paper investigated the moisture and strength properties of wood-polymer composites (WPC), which were made using three different recycled polymers wood flour as filler. The acrylonitrile butadiene styrene (ABS), polypropylene (PP), polyethylene (PE), collected from among construction demolition waste (CDW) at a local management center. commercial additives, such coupling agent lubricant, al...

In the present article a 45Mo-45Cu-10Al2O3 (wt%) nano-composite was produced by mechanical alloying, shaped cold pressing then hot at 950 °C. Our aim to investigate effect of different ball powder ratio (BPR) on particle size and shape, as well material composition. Investigations were done with XRD, SEM for pressed specimens Brinell hardness measurement. Lower BPR resulted in nano-sized crysta...

The article analyses the structure of cavitated areas ship propeller blades made from aluminum bronzes with different composition. most informative zones cavitation wear are cold-hardening zone and peripheral one that help estimate mechanical parameters causing cavities to collapse. dents formed on metal surface in process hydrodynamic have spherical parts their bottoms, which it is possible in...

The cylinder liner is one of the important parts a diesel engine. Gray cast iron main material for manufacturing liners due to its good casting performance, convenient processing wear resistance and low cost. In present work, effects vanadium (V) tin (Sn) on microstructure properties gray were studied. Results show that increasing contents V Sn can not only refine graphite, but also reduce pear...

In view of the local cracking and leakage water-wall pipe Subcritical Boiler in a thermal power plant, mechanism water wall was studied by means macroscopic analysis, chemical composition metallographic structure, Brinell hardness test, tensile test at room temperature scanning electron microscopy. The results show that there is no misuse materials or unqualified cracked leaked pipe. There are ...

This present work suggests a charge technique to produce super high-velocity fragment (≥2350 m/s) using 30 mm launching system. The steel cylindrical fragments with Brinell hardness HB ≤ 270 are designed according STANAG 4496 in the experiment, and test system including interval speed measuring device, pressure measurement high-speed camera is employed obtain information on velocity, muzzle fie...

The wood of five European species: black poplar (Populus nigra L.), beech (Fagus sylvatica ash (Fraxinus excelsior oak (Quercus robur and Scots pine (Pinus sylvestris L.) was subjected to thermal modification in nitrogen atmosphere at 190 °C during 6 h. Native modified varnished oiled industrial conditions. Thermally (TM) characterized by a greater absorption varnish oil when applying the first...