ANALISIS TEMPERING DENGAN QUENCHING MEDIA OLI MESRAN SAE 40 TERHADAP SIFAT MEKANIK POROS S 45 C
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Abstract
This research intends to know the influence of temper and quenching cooling
media of oli mesran SAE40 towards the characteristic of machine of stell S45C. The proses
of temper is conducted in 300C with the holding time 60 minute while the process of
quenching is conducted in 870C with the holding time 30 minute.
The method used in this research is descriptive. The raw material for the specimen
is stell S45C, imported by PT.TIRA AUSTENITE. The specimen of pull test use standard
JIS Z 2204 and hardness use standard JIS Z2245.
The chemical composition testing shows that steel S45C enter in the medium carbon
steel with the content carbon 0,44%. The result of tensile strength of steel S45C after
heating by temper-quenching by using the two different medias of temper, those are free air
which result of the tensile strength is 1096,86 N/mm2, it is higher than oil which result is
783,38 N/mm2. However, the average elongation of free air is 3,62% with the average
contraction 32,36%. It is smaller than the average elongation of oil that is 7,18% with the
average contaction 48,96%. The average result of strength testing temper media of free air
is 185,33 HB. It is bigger than the average result of temper test by using oil that is 173 HB.
From the result of the steel testing, the temper-quenching by using oil as the media
is suggested to be used if we want to produce the steel with a high level of the though, so
that the steel is easier to be formed.
Key words: quenching, tempering, tensile strength of shaf S45C.
media of oli mesran SAE40 towards the characteristic of machine of stell S45C. The proses
of temper is conducted in 300C with the holding time 60 minute while the process of
quenching is conducted in 870C with the holding time 30 minute.
The method used in this research is descriptive. The raw material for the specimen
is stell S45C, imported by PT.TIRA AUSTENITE. The specimen of pull test use standard
JIS Z 2204 and hardness use standard JIS Z2245.
The chemical composition testing shows that steel S45C enter in the medium carbon
steel with the content carbon 0,44%. The result of tensile strength of steel S45C after
heating by temper-quenching by using the two different medias of temper, those are free air
which result of the tensile strength is 1096,86 N/mm2, it is higher than oil which result is
783,38 N/mm2. However, the average elongation of free air is 3,62% with the average
contraction 32,36%. It is smaller than the average elongation of oil that is 7,18% with the
average contaction 48,96%. The average result of strength testing temper media of free air
is 185,33 HB. It is bigger than the average result of temper test by using oil that is 173 HB.
From the result of the steel testing, the temper-quenching by using oil as the media
is suggested to be used if we want to produce the steel with a high level of the though, so
that the steel is easier to be formed.
Key words: quenching, tempering, tensile strength of shaf S45C.
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