Document Type : Research Paper
Authors
1 University of Technology Materials Engineering
2 University of Babylon / Engineering / Materials Engineering
Abstract
Abstract This investigation is aimed to improve the carbide tips by studying the effect of adding new powders to the composition of the carbide tips . So a basic mixture containing ( WC , Ti - WC , Co ) with weight percentage ( 62 % , 32 % , 6 % ) was prepared . This mixture was compacted with different pressures and sintered with ( 1410 ° C ) to study the effect of compacting pressure on final properties of tools . The effect of adding different weight percentage ( 1 % , 3 % ,5 % , 7 % ) of ( TaC , SiC ) to the basic mixture was studied . All samples were evaluated by : physical tests , such as bulk - density , green - density , shrinkage test and by mechanical tests , such as macro and micro hardness , transverse rupture strength and tool performance test . The results show that , the tools with an addition of ( 4 % TaC ) have the longer life relative to other tools , while the tools with ( 3 % SiC ) have the shorter life relative to other tools for all cutting speed and all feed rates .
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