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Study Some Properties for Manufactured Grinding Wheels by Use Different Abrasive Materials

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 حسين طلب نهابة سرحان السلطاني 11/12/2017 19:32:21
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In This paper an experimental studying for manufacturing grinding wheels from )) with particle 3O2different abrasive materials (silicon carbide (SiC) and alumina (Alsize (154?m)) and vitrified bond (powder of window glass scrap with particle size (125?m)). This study made to evaluate the effect of vitrified bond percentage on the mechanical and physical properties for manufacturing grinding wheels in laboratory. The percentage of vitrified bond was (8, 14, 20 % wt). The samples of grinding wheels were produced by powder technology, where the powders of the abrasive and vitrified bond mixed together and pressed at (110 MPa) by use steel alloy molds. After that, the samples were firing at (700 ?C). The physical properties (density and porosity) and mechanical properties (hardness, bending strength, compressive strength and wear rate) were determined for all samples. The results showed that the density, hardness, bending strength and compressive strength increased and, the porosity and wear rate decreased with increasing the vitrified bond percentage for manufacturing grinding wheels from (517MPa) e was The higher hardness valu). 3O2silicon carbide (SiC) and alumina (Alwhen silicon carbide was used with (20 % wt.) of vitrified bond and least wear rate was ) when alumina was used with (20 % wt.) of vitrified bod. The mechanical 2(0.088 g/cmand physical properties improve with increasing the vitrified bond percentage for manufacturing grinding wheels from different abrasive materials, also the strength values of manufactured samples from alumina (Al2O3) higher than that of manufactured samples from silicon carbide (SiC). While the wear rat of the manufactured grinding wheels from alumina least than that of the manufactured grinding wheels from silicon carbide in the same test conditions (the wear load and
time)

  • وصف الــ Tags لهذا الموضوع
  • Silicon carbide, alumina, vitrified bond, grinding wheels, wear rate.

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