PENGARUH VARIASI TEMPERATUR HEAT TREATMENT TERHADAP KEMAMPUKERASAN BAJA KOMERSIL DENGAN METODE JOMINY TEST
https://doi.org/10.58466/injection.v1i1.1346
Keywords:
hardenability, jominy test, hardness test, hardening, quenchingAbstract
Hardenability is the ability of a material to be hardened to a certain depth by means of heat treatment to form
martensite in the cooling process to achieve a certain hardness. One of the hardenability testing methods is the
Jominy Test. The specimen is heated at the specified temperature, then cooled by spraying water at one end. After
testing with the Jominy test apparatus, its hardness was measured using the hardness test equipment.The testing
of Jominy is based on ASTM standard A255. Testing using specimens with a length of 100 mm, diameter
25.4 mm as much as 9 pieces. Hardness is measured by the Rockwell Hardness Test method. The test result on
specimen 1 with a final temperature of 700 °c resulted in an average hardness value of 45.51 HRB, on specimen
9 with a final temperature of 1100 °c amounting to 47.32 HRB. The higher the end temperature of the heating,
the hardness value produced will be relatively higher. The highest average hardness value is in specimen 7 with
a heating temperature of 1000 °c by 47.48 HRB.
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