The Performance Of Carbide Tools When Hard Turning AISI D2 Tool Steel
The machining of hardened steels has been widely investigated by researchers today. CBN is widely used as a cutting tool to machine hardened steel, but the cost of CBN is high. Carbides have high hardness over a wide range of temperatures, high elastic modulus, high thermal conductivity, and low...
| Summary: | The machining of hardened steels has been widely investigated by researchers today.
CBN is widely used as a cutting tool to machine hardened steel, but the cost of CBN is
high. Carbides have high hardness over a wide range of temperatures, high elastic
modulus, high thermal conductivity, and low thermal expansion and more important it is
cost-effective cutting tool for a wide range of applications. In this study the performance
of carbide tools when hard turning AISI D2 tool steel of 55 HRC has been investigated.
Tool wear and wear mechanisms are analyze by using image analyzer and Scanning
Electron Microscope. Surface roughness is measured by using portable surface
roughness tester, SJ-301. From the results it has been observed that time taken for
carbide cutting edge to start cracking and fracturing is longer when cutting at low speed
than a high speed. Surface finish in the range of 1.05 μm to 2.25 μm was obtained in this
study. Coated carbide cutting tools shows better performance compared to uncoated
carbide cutting tools. It is found that cutting speed play a major role in determining the
tool life and roughness of the surface. |
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