Machining Performance Of Titanium Carbide (TiC) As Tool Coating

Aida Adlina , Mohamad Raffi (2006) Machining Performance Of Titanium Carbide (TiC) As Tool Coating. Project Report. Melaka, Malaysia, UTeM. (Submitted)

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Abstract

This paperwork contain the report of machining performance of tool coating when apply in machining process. The aim of this paperwork is to present flank wear characteristics of titanium carbide (TiC) as coated material on cemented carbide tool during machining a medium carbon steel (AISI 1045) material in dry turning. Machining performance is determined according to tool wear, tool life and surface finish that obtained. The nominal (starting) workpiece diameter is 50mm and the cutting speeds used are 300, 400, 500, and 600 mlmin with feed rate and depth of cut is O.2mm1rev and O.5mm, respectively. The cutting time is considered in this machining test to identify the tool life. Four interval of cutting time has been setup for each cutting speeds which is 5, 7.5, 10 and 12.5 min. From that, the appropriate cutting parameters for each cutting tool will be identify depending on tool wear and tool life. Tool wear that appeared is analyzed by flank wear as recommended in ISO 3685 (1993): Tool life testing with single point turning tools. From study, the rate of wear growth and wear mechanism at the end of tool life was investigated in detail using scanning electron microscope (SEM). From the photographs of progressive wear, it has been observed that the time taken for the cutting edge of TiC coated carbide tools to initiate cracking and fracturing is longer when cutting at low speed than at high speed such as 600mlmin. The critical cutting speed influence the surface finish of work materiaL Tool variables, workpiece variables and setup variables are factor that affect surface roughness in rough turning.

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