Analisis Pengaruh Temperatur dan Media Pendingin pada Proses Hardening Terhadap Tingkat Kekerasan Baja ST 42 & ST 60 Menggunakan Uji Brinell. (Analysis of The Effect of Temperature and Cooling Media in The Hardening Process on The Hardness Levels of ST 42 & ST 60 Using The Brinell Test).

Angkoso, Bagas (2023) Analisis Pengaruh Temperatur dan Media Pendingin pada Proses Hardening Terhadap Tingkat Kekerasan Baja ST 42 & ST 60 Menggunakan Uji Brinell. (Analysis of The Effect of Temperature and Cooling Media in The Hardening Process on The Hardness Levels of ST 42 & ST 60 Using The Brinell Test). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Hardness testing is a method for determining the effect of hot or cold treatment on materials that have undergone heat treatment and cold treatment can show the change in material strength by measuring the surface hardness of the material. In this test using ST 42 and ST 60 materials where these materials are commonly used in the construction of heavy equipment and shafts. The formulation of the problem in this study is to find out how much influence the hardening process has on each specimen. This test was carried out with each material with a total of 9 specimens, size Ø 30 mm and length 20 mm on each object to be tested heat at different temperatures, namely 850 ℃ using water cooling, 950 ℃ using oil cooling SAE10, and 1050 ℃ using air cooling . Furthermore, the hardness of the object will be tested with the brinell test using a spherical indenter with a diameter of 2.5 mm so that the appropriate treatment can be determined to obtain material properties that meet the needs, especially in heavy equipment construction. This type of research is an experimental type research, experimental research can be interpreted as a research method used to find the effect of certain treatments on others under controlled conditions, in this test the brinel test data was obtained on ST 42 steel with a hardness level of 585.864 kg/

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