OPTIMASI HARDENING BAJA KARBON SEDANG DENGAN FLUIDA GETAH POHON PISANG MENGGUNAKAN METODE TAGUCHI
ABSTRACT: The aim of this
research is to increase the hardness of the material with hardening process.
Factors that influence the hardening process are the raw material, the heating
temperature, holding time and cooling medium. To obtain the optimum combination
of factors hardening process, this research adopted the Taguchi experimental
design method. The type used were orthogonal array L9 (34) which generates a
combination of 4 factors with each factor has 3 levels.Raw materials used were
retrieved from the leaf springs trucks, jeeps and minibuses which are medium
carbon steels with different chemical compositions. Based on the heating
temperature recommended for medium carbon steel hardening process is between
723 - 900ºC then the heating temperature used 723ºC, 800ºC, 850ºC. Whereas for
the holding time that carbon steel is recommended for 5-10 minutes, then the
holding time used were 5, 7.5, 10 min. For the cooling medium used in this
research are banana tree sap fluid and also water and oil as a comparison. In
this research presented the results of hardness test hardening process with a
combination of treatments truck spring steel material, temperature 850ºC, 10
min holding time and cooling medium with banana tree sap fluid in order to get
the highest hardness worth HRC 63.03. Based on the analysis of Taguchi method
can be seen that the four factors the most influence on hardness of material is
temperature, holding time, cooling medium, and the smallest is the material.
Penulis: Roymons Jimmy Dimu,
Denny Widhiyanuriyawan, Sugiono
Kode Jurnal: jptmesindd140194
