The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials
The research aims to investigate the effect of the cooling medium on the hardness characteristic and microstructure of the 42CrMo4 steel due to hardening treatment at a temperature of 830°C and holding time of 30 minutes. Various oil such as SAE-10W40, SAE-20W50, SAE-40, and used oil was used in the...
Αποθηκεύτηκε σε:
| Κύριοι συγγραφείς: | , , |
|---|---|
| Μορφή: | UMS Journal (OJS) |
| Γλώσσα: | eng |
| Έκδοση: |
Universitas Muhammadiyah Surakarta
2020
|
| Θέματα: | |
| Διαθέσιμο Online: | https://journals2.ums.ac.id/index.php/arstech/article/view/11 |
| Ετικέτες: |
Προσθήκη ετικέτας
Δεν υπάρχουν, Καταχωρήστε ετικέτα πρώτοι!
|
| _version_ | 1805340799638962176 |
|---|---|
| author | Hariningsih, Hariningsih Sumpena, Sumpena Sukarjo, Heribertus |
| author_facet | Hariningsih, Hariningsih Sumpena, Sumpena Sukarjo, Heribertus |
| author_sort | Hariningsih, Hariningsih |
| collection | OJS |
| description | The research aims to investigate the effect of the cooling medium on the hardness characteristic and microstructure of the 42CrMo4 steel due to hardening treatment at a temperature of 830°C and holding time of 30 minutes. Various oil such as SAE-10W40, SAE-20W50, SAE-40, and used oil was used in the cooling medium. The changes in product size, hardness, and microstructure have been carefully assessed. The results indicated that the viscosity of the coolant medium strongly influenced the cooling rate of the cooling medium, hardness, and microstructure. SAE-10W40 oil and SAE-20W50 oil only needed 2 hours to return within room temperatures before quenching, whereas SAE-40 oil and used oil took 3 hours. The sample size did not change after hardening-quenching. However, there was a residual carbon layer on the sample surfaces. Quenching caused the changes of microstructure from pearlite and ferrite to ultrafine double phase, consisting of martensite and austenite, which were unable to transform during rapid cooling. The highest hardness value was achieved by the treated product, which was quenched in SAE-10W40, which had 54.59 HRC. The high hardness was attributed to the content of 95% martensite. However, used-oil caused in similar hardness as SAE-20W50. |
| format | UMS Journal (OJS) |
| id | oai:ojs2.journals2.ums.ac.id:article-11 |
| institution | Universitas Muhammadiyah Surakarta |
| language | eng |
| publishDate | 2020 |
| publisher | Universitas Muhammadiyah Surakarta |
| record_format | ojs |
| spelling | oai:ojs2.journals2.ums.ac.id:article-11 The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials Hariningsih, Hariningsih Sumpena, Sumpena Sukarjo, Heribertus Hardening-quenching Hardness Martensite 42CrMo4 steel Used-oil The research aims to investigate the effect of the cooling medium on the hardness characteristic and microstructure of the 42CrMo4 steel due to hardening treatment at a temperature of 830°C and holding time of 30 minutes. Various oil such as SAE-10W40, SAE-20W50, SAE-40, and used oil was used in the cooling medium. The changes in product size, hardness, and microstructure have been carefully assessed. The results indicated that the viscosity of the coolant medium strongly influenced the cooling rate of the cooling medium, hardness, and microstructure. SAE-10W40 oil and SAE-20W50 oil only needed 2 hours to return within room temperatures before quenching, whereas SAE-40 oil and used oil took 3 hours. The sample size did not change after hardening-quenching. However, there was a residual carbon layer on the sample surfaces. Quenching caused the changes of microstructure from pearlite and ferrite to ultrafine double phase, consisting of martensite and austenite, which were unable to transform during rapid cooling. The highest hardness value was achieved by the treated product, which was quenched in SAE-10W40, which had 54.59 HRC. The high hardness was attributed to the content of 95% martensite. However, used-oil caused in similar hardness as SAE-20W50. Universitas Muhammadiyah Surakarta 2020-06-10 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://journals2.ums.ac.id/index.php/arstech/article/view/11 10.23917/arstech.v1i1.11 Applied Research and Smart Technology (ARSTech); Vol. 1 No. 1 (2020): Applied Research and Smart Technology; 28-34 2722-9645 2722-9637 10.23917/arstech.v1i1 eng https://journals2.ums.ac.id/index.php/arstech/article/view/11/14 Copyright (c) 2020 Hariningsih Hariningsih, Sumpena Sumpena, Heribertus Sukarjo https://creativecommons.org/licenses/by/4.0 |
| spellingShingle | Hardening-quenching Hardness Martensite 42CrMo4 steel Used-oil Hariningsih, Hariningsih Sumpena, Sumpena Sukarjo, Heribertus The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials |
| title | The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials |
| title_full | The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials |
| title_fullStr | The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials |
| title_full_unstemmed | The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials |
| title_short | The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials |
| title_sort | effectivity of used oil as quenching medium of 42 crmo4 steel for automotive materials |
| topic | Hardening-quenching Hardness Martensite 42CrMo4 steel Used-oil |
| topic_facet | Hardening-quenching Hardness Martensite 42CrMo4 steel Used-oil |
| url | https://journals2.ums.ac.id/index.php/arstech/article/view/11 |
| work_keys_str_mv | AT hariningsihhariningsih theeffectivityofusedoilasquenchingmediumof42crmo4steelforautomotivematerials AT sumpenasumpena theeffectivityofusedoilasquenchingmediumof42crmo4steelforautomotivematerials AT sukarjoheribertus theeffectivityofusedoilasquenchingmediumof42crmo4steelforautomotivematerials AT hariningsihhariningsih effectivityofusedoilasquenchingmediumof42crmo4steelforautomotivematerials AT sumpenasumpena effectivityofusedoilasquenchingmediumof42crmo4steelforautomotivematerials AT sukarjoheribertus effectivityofusedoilasquenchingmediumof42crmo4steelforautomotivematerials |