PENERAPAN TEKNOLOGI POWDER METALURGY UNTUK PEMBUATAN KOMPONEN MESIN BERBASIS PASIR BESI LOKAL

Abstract

Metalurgi powder is a commercial workpiece forming process of metal where the metal was
destroyed first in the form of flour, then flour is pressed in the mold (mold) and heated below the
melting temperature of the workpiece to form dust. So that the metal particles fuse because the
mechanism of mass transport due to diffusion of atoms between the particle surface. Powder
metallurgy method provides a rigorous control on the composition and use of mixtures that can not
be fabricated by other processes
In this study the process of soft magnetic iron production by mechanical alloying powder
process-based yan metalurgy local iron sand. Base backdrop that the use of local sand from the data
we can from the foundry industry raw materials and large penunjangsebagian still imported. Materials
that are 100% pengadaanya still relies imported materials are iron ore and alloys (Alloy).
Iron filings and sand powder 100 mesh size locally has mixed for 20 minutes. The amount of
powder added is 25%, 50%, and 75% by weight. Powder which had sifted and mixed and then
inserted into molds (dies) that has been coated by the lubricant of zinc stearate on the walls of the
mold then dikompaksi both single-action pressing with a pressure of 2000 psi in order to obtain a
sample form of tablets. Sintering temperature of 1000 0C for 30, 60, and 90 minutes later performed
dapur.Pengamatan cooling micro structure used optical microscopy and Vickers hardness tests
performed.
The results of this study is the optimal value of remanent induction at 25% by weight of sand
sintered 90 minutes by 9.4 Gauss and an optimal value of Vickers hardness at 75% by weight of
sand sintered 90 minutes at 501 HV.