Dual phase is a new structure at low or medium carbon steel. The
structure is obtained from the heating of low or medium carbon steel in
the region α + γ (temperatures between A1-A3), then follow by holding
process within a certain time and cooled quickly (quench) in water,brine
or oil. The result has a microstructure of martensite and ferrite as
well as a few otherstructures. The steel usually has high tensile
strength, good elongation and there is no discontinuity yield. The
problem is how the influence of parameters milling process on surface
roughness the dual phase carbon steel The purpose of this study was to
determine the outcome Freis CNC cutting conditions due to the formation
process of double and tempering phase that begins with the process of
forging (forging) on carbon steel .
This study used AISI1045 steel Ø16mm x
150mm diameter, which was forged at a temperature of 950oC-900oC to
form a rectangular cross section with a size of 10mm x 16mm x 180mm.
Dual-phase heating was continued at a temperature of 770ºC, arrested at
90 'and cooled rapidly in oil , followed by atempering process 600⁰C/30
'. The process of cutting was done by cutting finishing with feeding
0.12; 0.14; 0.16 mm / put and depth of cut 0.4; 0.6; 0.8 mm while
roughing cuts by feeding 0.2;0.4; 0.6 mm / put and depth of cut 1.2,
1.4;a1.6amm .The result Depth of cut can affect the deflection. The
deflection could be increased by increasing the depth of cut. The
results obtained increase the level of surface roughness. On the depth
of cut 0.4 mm with feeding 0:16mm / put the value obtained average
roughness Ra 0.64 μm, including group N6 roughness when compared with
0.8 mm depth of cut with the same feeding value of average roughness Ra
1.08 μm including N7. Surface roughness increased by feeding could
affect the feeding of 0.12 mm / put and 0.16 mm / put, 0.2 mm / put and
0.6 mm /put because the distance from the cutting peak roughness
increases, so the roughness of the rough and the process of finishing
cuts on carbon steel dual phase is more subtle than on the untreated
carbon steel with the same cutting parameters.
http://rekayasamesin.ub.ac.id/index.php/rm/article/view/124/126
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