Experimental Study Conducted Rendahsetelah Tenacity Carbon Steel Heat Treatment Austempering
| Main Author: | R D, Wijaya |
|---|---|
| Format: | Article info application/pdf eJournal |
| Bahasa: | eng |
| Terbitan: |
Bandar Lampung University (UBL)
, 2017
|
| Subjects: | |
| Online Access: |
http://artikel.ubl.ac.id/index.php/icetd/article/view/1025 http://artikel.ubl.ac.id/index.php/icetd/article/view/1025/1351 |
Daftar Isi:
- The principle of this Austempering heat treatment is done by heating the steel to austenite tempratur then quenching the hot water bath salts ± 250-550 ° C and held at that time long enough so that the austenite transformed into bainite entirety. If the eutectoid steel is cooled rapidly in the austenite phase to a temperature between 250- 550 ° C and held at that temperature interval (isothermal) will be formed called bainite microstructure according to the name of the inventor, Dr. EC Bain. Bainite microstructure is the result of non-lamellar eutectoid reaction while perlite produced from lamellar eutectoid reaction. Bainite is a microstructure that is a mixture of ferrite phase and cementite (Fe3C). At a temperature of 350-550 ° C will be formed bainite top (upper bainite) while at 250-350 ° C will be formed under the bainite (lower bainite). In this study material used for heat treatment of austempering is low carbon steel with a solution of salt water quenching media. In this study austempering process carried out at a temperature of 300, 350, and 400 ° C with a holding time of 30 minutes. The results of this study indicate if low carbon steel austempering process is carried out hardness values decreased, namely from 144 to 116 at a temperature of 400 ° C, so the higher the austempering tempratur lower hardness value