Mechanical Properties of Pack Carburized SCM 420 Steel Processed Using Natural Shell Powders and Extended Carburization Time

Abstract

The feasibility of using coconut shell powder (CSP) and dog conch shell powder (DCSP) as carburizing media in the pack carburization of SCM 420 steel was investigated. The carbon content and surface hardness of the carburized specimens prepared with different CSP:DCSP ratios and carburizing durations were examined and compared. A CSP:DCSP ratio of 60%:40% and an extended carburizing time of 12 h were found to increase the carbon content of the carburized specimens to 1.14 ± 0.007 wt%. Furthermore, the surface hardness was significantly improved to 961.3 ± 4.918 HV following water quenching. Finally, the thickness of the carburized layer of the quenched specimens increased by around 2.5 times as the carburizing duration was increased from 3 to 12 h.

Effect of case hardening on the wear and hardness properties of medium carbon steel for bone crushing application

“…12 (c). This is due to the fact that hardness increases with carbon content at an elevated temperature and time [ 19 ]. Intercritical heat treatment, also known as high-temperature heat treatment, is a quick and easy approach to creating ferrite/martensite dual-phase microstructure, which balances steel's ductility and strength.…”

PENGARUH KATALIS CaCO3 PADA PROSES PACK CARBURIZING TERHADAP KEKERASAN BAJA KARBON, A REVIEW

“…Gambar 6 menunjukan terjadi penurunan nilai kekerasan pada penambahan 50% katalis [29], penambahan katalis menurut Suherman dalam bukunya menyebutkan bahwa penambahan katalis maksimal 40% [7], hal itu bersamaan dengan semakin banyaknya penambahan penggunaan katalis dan mempunya sifat mudah untuk terurai dari katalis jenis kalsium karbonat, maka jumlah gas CO2 yang dihasilkan dari reaksi dekomposisi akan terjadi peningkatan [30], di sisi lain, peningkatan penambhan penggunaan katalis yang tidak sebanding dengan sumber karboon akan mengurangi kapasitas karbon dalam media carburizing yang tersedia untuk bereaksi [30]. Dengan begitu, peningkatan jumlah gas CO2 yang dihasilkan dari reaksi dekomposisi tidak sebanding dengan ketersediaan karbon (C) dalam media carburizing untuk difusikan ke dalam permukaan baja, hal itu menyebabkan gas CO2 hanya berinteraksi tanpa terjadi penangkapan atom-atom karbon untuk melarutkannya ke dalam permukaan baja, yang akhirnya mengakibatkan penggunaan katalis kalsium karbonat dalam jumlah persentase yang berlebihan menyebabkan penurunan nilai kekerasan [31].…”

Study on microstructure and wear characteristics of carburized steel at different carburizing times using catalyst strombus turturella shell waste powders

“…The present team has investigated that strombus turturella shell powder can be utilized as a catalyst in the carburizing of SCM420 steel in earlier investigations. The investigation's findings revealed that the pack carburizing procedure considerably improved the hardness and wear resistance of SCM 420 steel by employing coconut charcoal powder as a carbon source and Strombus Turturella shell powder as a catalyst [11][12][13]. However, the research examinations are still restricted to examining the impact of SCM 420 steel's wear properties on the variation in the catalyst percentages.…”