Abstract
A removal process for the powder compacts prior to sintering (referred to as “green compacts”), which is known as green machining, has been attracting attention lately. In order to clarify the characteristics of green machining, using two types of iron-based powder, we have conducted drilling experiment comparing the green machining and machining the sintered body. Test specimens created under forming pressures of 600 MPa from iron powder and high-strength steel alloy powder were examined for drill tool life, thrust and torque values during drilling, chip morphology, surface roughness and mechanical strength. It is concluded that there is more benefit to be gained by green machining of compacts of high-strength alloy powder than of iron powder.
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