ANALISA KEKERASAN DAN MIKROSTRUKTUR TERHADAP BAJA ST 41 DENGAN VARIASI HOLDING TIME DAN MEDIA PENDINGINAN (QUENCHING)
| Main Author: | Wahyuana, Marga Candra |
|---|---|
| Format: | Thesis NonPeerReviewed |
| Terbitan: |
, 2014
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| Subjects: | |
| Online Access: |
http://eprints.umm.ac.id/16189/ |
Daftar Isi:
- The use of low carbon steel ST 41 in everyday life as material is nut, bolt, screw thread, weapons equipment, and so forth. This is because prior experience has carburizing steel is easy to do with the nature of the engine (Daryanti, 2006:63). However, the use of steel ST 41 is limited to the parts that have less friction and heavy loads. This is because the carbon steel ST 41 mechanical properties, especially hardness and ductility less according to the existing needs. To obtain a construction material that is hard on the surface and at the core of ductile steel carburizing is carried out. Carbonization or carburizing is the process of adding the element carbon on the surface of low carbon steel, heating carbonization carried out at a temperature of 900-950 degrees Celsius (Beumer, 1980:50). In this study pack carburizing process using a temperature of 900 degrees Celsius with charcoal powder in the mix as much as 90 % with 10 % barium carbonate powder as an energizer to the variation of retention time of 15 minutes, 30 minutes, and 45 minutes and the variation of the cooling medium (quenching) is oil SAE 10 - 40W, SAE 20 – 50W, and SAE 40W. From the research that has been done it is concluded that the differences are quite significant increase in hardness of the variation in the allotted time, with the length of detention time is 45 minutes found also an increase in violence is quite high. The existence of a significant increase in violence is also shown that the quenching process with SAE 40W oil medium.