Fabrication and performance measurement of uncoated carbide insert

Abstract

Tungsten carbule/cobalt ("WC/Co") is widely uscd for cutting tools, me!al-formmg tools, mining tools, and wear resistance surfaces for various 3pplieations. For these application; (he Important mechanical properties arc hardncss, toughness, compressive strength, transverse rupture strength, and wcar resistance. The properlie~ of tungsten carbide/cobalt (WC/Co) are controlled by composition and microstructure. The hardness increases wilh decreasing Co (Cobalt) content and smaller paltiele size of WC. Again addition of titanium carbide and tantalum carbide with WC/Co improve significantly hot hardness; reduce' transverse IUpture strcngth and the tcndency of chips to weld of the cutting tool edge. In this, project worl(, carbide insert was fabricated by varying composition and reducing the grain size of tungsten carbide (WC) in BOr (Bangladesh Ordnancc Factories). Here this insert is tenned JS the 'New lnsert' and the standard/traditional insert ol'BOF is termed as 'Existing lnscrt'. Thc composition offabrieatcd carbide was selected by reviewing several papers atld handbooks, The grain size of we is measured by using the sieve. Other paramcters of prescnt we fabrication process rcmain unchanged. To compare the perfonmmce, brazed insert tuming tool was manufactured by the newly fabricated insert and maehimng on steel was pcrfomled. Proces~ parameters such as tool wear, surface finish and temperature was recorded for both (he newly fabncated insert and existing insert with samc cutting condition. 1l is found that surface finish improvcd whercas tool wcar and tcmperature gencration rcduees for the ucwly fabricated inscrt tool.