Analysis of Pack Carburizing Process on Raw Material Aisi 1020 on Surface Hardness and Microstructure with Variation of Temperature and Holding Time Using Oil Cooling Media

Firmansyah, Addie Restu and Putra, Septian Chandra (2022) Analysis of Pack Carburizing Process on Raw Material Aisi 1020 on Surface Hardness and Microstructure with Variation of Temperature and Holding Time Using Oil Cooling Media. Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Low carbon steel is often used as a basic material for automotive spare parts on the market . However , the price of the manufacturer's spare parts on the market is very expensive . Therefore , this study aims to improve the quality of carbon steel that is not inferior to those made by manufacturers where the price is relatively affordable by carrying out pack carburizing This study uses the pack carburizing method , AISI 1020 steel as the starting material and uses fine coconut shell charcoal powder as a carbon source mixed with Na2CO3 as an energizer . Pack carburizing using temperature variations of 8500C , 8750C . 9000C with holding times of 40 minutes , 50 minutes , 60 minutes , aims to find out how the results of hardness and microstructure as well as case depth values on variations between temperature and holding time . And also use SAE 20w - 40 oil as quenching medium . The highest hardness results were obtained in specimens with a heating temperature of 9000C with a holding time of 60 minutes , with an average hardness value of 54.21 HRC and also a case depth value of 0.51mm . Accompanied by the phase formed is 61 % pearlite 39 % ferrite. Keywords : Pack Carburizing, Quenching, AISI 1020, Case Depth

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