PENGARUH PERLAKUAN PANAS TERHADAP KEKERASAN BAJA KARBON TINGGI BOHLER K460
ABSTRACT: Steel is the kind of
metal that most widely used in various fields of engineering, particularly for
industrial purposes, like building construction, aircraft construction, the
manufacture of tooling equipment, and others. The number of usage on the kind
metal is not separated from the properties owned, such as: easy to set up, but
has strong and tough properties are easily processed by machining. The use of
high-carbon steel is mainly used for making springs, and die cutting tools and
forming tools. Carbon steel with high strength and hardness has a better after
heat treatment. Heat treatment that frequently applied was the process of
hardening (quench hardening) and tempering. This research would conducted in
the laboratory experiments and is planned to last for 8 (eight) months. The material
to be used was of high carbon steel. High carbon steel(Bohler K460) is heated
to a temperature variation of 850oC, and 900oC with their respective holding
time that used for 24 minutes, then quenched in the salt water. The research
data was obtained through the process of tensile testing, hardness testing and
metallographic structure. This research aims to determine the properties of
hardness determine the effect of heat treatment parameters, namely temperature,
holding time and cooling medium to high carbon steels violence at the time of
quenching and to analyze the mechanical properties of high carbon steels as a
result of variations in heat treatment. The results indicate that the variation
of heat treatment parameters (i.e. temperature, holding time, and cooling
media) against the carbon steel of high hardness makes a difference significant
influence on the hardness after quenching process. With a temperature
difference, 8500C and 9000C temperature and holding time for 24 minutes and
then do the quenching process results in changes in the value of the highest
hardness of 64.8 HRC was obtained after quenching process at a temperature of
900oC.
Penulis: Asmeati Asmeati,
Yanti
Kode Jurnal: jptmesindd140438
