Pengaruh media pendingin dan waktu pada perlakuan pack carburizing-quenching baja karbon rendah SS400

S. Sujita, I.G.N.K. Yudhyadi, A. Zainuri, I.G.A.K.C. Adhi, R. Sutanto

Abstract


The SS400 low carbon steel is widely used in the agricultural equipment industry because of its specific properties, malleability good corrosion resistance, and high strength to weight ratio. However, according to several research results it has several weaknesses, low surface hardness, ductility and wear resistance. Therefore, it is necessary to improve its mechanical properties so that the agricultural equipment products produced are of better quality. The purpose of this study was to determine the effect of variations in time and cooling media in the pack carburizing-quenching treatment of SS400 steel specimens. The pack carburizing treatment was carried out at a temperature of 875 ºC, 90 minutes, the carburizing medium was a mixture of corncob charcoal powder and Picntada maxima shell powder, with a composition of 70%: 30%, followed by a quenching process with variations in time (1, 2, 3, 4). minutes) and cooling medium (water, oil SAE 40, cane molasses 10% and  cane molasses 30%. The results of the study showed that the time and cooling medium affected the surface hardness, ductility and microstructure of the specimens With 30% cane molasses cooling medium, quenching time of 4 minutes, the largest specimen absorbed impact energy (toughness) is 2.23 J/mm2. On the other hand, the lowest surface hardness number is 285 Kg/mm2.The increased ductility causes the cracking marks to disappear on the specimen surface. Based on observations with SEM, there is a decomposition of the martensite structure with coarser grain sizes.

 


Keywords


Pack carburizing-quenching Cooling medium Surface hardness number Ductility

Full Text:

PDF

References


ASTM Speciality Handbook, 2005, Carburizing technology for low carbon steel and steel alloys, JR.Davis and Associates, USA.

Anonim, 2019, Kegiatan industri dan perdagangan, Dinas Industri dan Perdagangan NTB.

Anonim, 2017, Sentra Budidaya Jagung, BPS Propinsi NTB.

Apriatun, Taufikurahman, Sundari E., 2021, Analisa pengaruh waktu penahanan pada proses pack carburizing terhadap kekerasan baja karbon rendah ST 37, Machinery Jurnal Teknologi Terapan, Poteknik Negeri Sriwijaya, 2(1), 36-41.

Al-Sabea, Jabbar, Al-Hashimy, Zahid, 2017, Effect of different quenching media on microstructure, hardness, and wear behavior of steel used in petroleum industries, Journal of Petroleum Research & Studies, 3(2), 67-75.

Saini B.S., Gupta V.K., 2012, Fatigue crack propagation behaviour of some low alloy steels in case carburised condition, International Journal of Materials Engineering Innovation, 3(5), 330–339.

Dodo M.R., Ause T., Dauda E.T., Adamu M.A., 2016, Investigating the cooling rate of cane molasses as quenching medium for 0.61% C high carbon steels, Metall. Mater. Eng., Association of Metallurgical Engineers of Serbia, 22, 39-49. 10.30544/139.

Ihom P.A., 2013, Case hardening of mild steel using cowbone as energiser, African J. Eng. Res, 1(3), 97–101.

Istiroyah, Septi D.W., Suhana, 2019, The effect of quenching media on hardness and carbon in carburized steel, IOP Conf. Series Materials Science and Engineering 546

Kumar, Ramesh, Selvaraj, Senthil K.G., Ramesh, Arravind M.D., Venkateswarlu, 2019, Effect of soaking time on evolution of microstructure and hardness during annealing of EN-47 spring steel, Materials Science Forum. 969, 427-432.

Kowser M.A., Motalleb A., 2015, Effect of quenching medium on hardness of carburized low carbon steel for manufacturing of spindle used in spinning mill, Procedia Engineering, 105, 814-820

Oyetunji, Akinlabi, Adeosun, Samson, 2012, Effects of carburizing process variables on mechanical and chemical properties of carburized mild steel, Journal of Basic & Applied Sciences. doi:10.6000/1927-5129.2012.08.02.11.

Shao-lei Long, Yi-long Liang, Yun Jiang, Yu Liang, Ming Yang, Yan-liang Yi, 2016, Effect of quenching temperature on martensite multi-level microstructures and properties of strength and toughness in 20CrNi2Mo steel, Materials Science and Engineering A, 676, 38-47..

Sultan J.N., 2013, Effect of austenizing and tempering heat treatment temperatures on the fatigue resistance of carburized 16MnCr5 (ASTM 5117) Steel, Tikrit Journal of Engineering Science, 20(4), 1-10

Salman K.D., 2018, Effect of quenching media on mechanical properties of medium carbon steel 1030, Journal of University of Babylon, Engineering Sciences, 26(2), 214-222.

Sujita, Zainuri A., Paryanto D.S., 2015, Pengaruh penambahan serbuk tulang sapi terhadap kekerasan dan keuletan baja carbon rendah pada proses pack carburizing dengan dengan media carburasi arang bambu, Laporan Penelitian Dasar, Fakultas Teknik Universitas Mataram.

Sujita, Salman, Sugiman, Agus D.C., Paryanto D.S., 2020, Peningkatan kualitas produk alat pertanian dengan metode pelapisan calsium carbida (CaC) melalui proses pack carburizing, Laporan Penelitian PNBP, Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Mataram.




DOI: https://doi.org/10.29303/dtm.v11i2.471

Refbacks

  • There are currently no refbacks.


Copyright (c) 2021 Sujita Darmo, Gusti Yudhyadi, Achmad Zainuri, Chatur Adhi Aryadi, Rudy Sutanto

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.