Suhdi, - and Edward Prawiro, - and Rodiawan, S.T., M.Eng.Prac., - (2017) Determination of Optimum Size of Rubber Fruit Shell Charcoal Powder Grain To Increase The Value of Surface Harrdness of Steel St 37 In Pack Carburizing Process. International Journal of Scientific & Engineering Research, 8 (5). pp. 548-563. ISSN 2229-5518 (In Press)
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The development of use of Pack Carburizing process to increase the value of steel surface hardness has encouraged to be conducted a research to improve the efficiency of process. One of the research conducted by Saparin (2011) by utilizing shell charcoal of rubber fruit as a source of carbon in Pack Carburizing process. Pack Carburizing process is carried out by covering the workpiece with rubber fruit shell charcoal powder as a source of carbon, then heated in a furnace until at the austenizing temperature. The use of carbon source in powder form has an effect on the carbon content that can be diffused into the surface of workpiece that will affect the value of surface hardness as revealed in a research conducted by Mujiyono and A.L. Sumowidagdo (2008) and Kuswanto, Bambang (2010). Therefore, this research aims to find out the optimum size of rubber fruit shell charcoal powder grain to increase the value of the surface hardness of steel. Material used in this research is low carbon steel ST 37 with a carbon content of 0.1367% C. Pack Carburizing process using 100% of carbon media from rubber fruit shell charcoal with a carbon content of 88.52% C. Grain size variations used consist of 18 mesh (1 mm), 30 mesh (0.6 mm), 100 mesh (0.15 mm), and 200 mesh (0.075 mm). Heating temperature of Pack Carburizing process is 925 ° C with a holding time of 6 hours. After that continued to the Hardening process at 860 ° C, 60 minutes of holding time and using water as a quenching media. Tempering process is done after Hardening process at temperature 100 °C for an hour.The results shows that the optimum size of rubber fruit shell charcoal powder grain to increase the surface hardness value of steel ST 37 is mesh 30 with carbon content diffused that can be generated on the specimen surface after Pack carburizing process is about 0.5253% C from the first carbon content (Non Pack carburizing specimen) in the amount of 0.1367% C. While, the surface hardness value is 223.9 HV after Pack Carburizing process and reaches about 832.2 HV after hardening + tempering process from surface hardness value on the first specimen (Non Pack Carburizing specimen) is about 132 HV.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Steel ST 37, rubber fruit shell, powder grain, Mesh, Pack Carburizing; Hardening; Tempering; carbon diffusion; hardness. |
| Subjects: | T Technology > TS Manufactures |
| Divisions: | KARYA TULIS DOSEN |
| Depositing User: | UPT Perpustakaan UBB |
| Date Deposited: | 18 Apr 2023 02:31 |
| Last Modified: | 18 Apr 2023 02:31 |
| URI: | http://repository.ubb.ac.id/id/eprint/7234 |
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