Abstract
In many industrial components which made of steel such as lathe gears, most of its were usually use medium carbon steel. Because this kind of steel has high wear resistance and shock resistance, but its cost more expensive than low carbon steel. Because of this reason, the author try to use low carbon steel as a base material (raw material) for lathe gear in order to to decrease production costs. However, low carbon steel material has a carbon content of less than 0,3%, so it has poor tensile, less hardness and less friction resistance. But it strength can be increased by adding carbon, namely by means of solid carburizing and hardening process. In this study the Pack Carburizing was done at a temperature of 950 o C with 1 hour holding time, and used carburizing media such as coal charcoal and Calcium Carbonat (CaCO3) as catalyst with composition of 80% + 20%. Hardening is carried out at 670 o C, 760 o C and 850 o C. The cooling method used direct cooling method and the cooling media was used oil..And then followed by material composition test, hardness test, and micro structure test. After heat treatment, there were 0.3%, increase value in hardness. The highest harness value was at 112.66 HRB and at carburizing temperature of 850 o C, Phases formed were Ferrite, Perlite and Martensite. Keywords: Pack Carburizing, Hardening, Gear
Highlights
Baja adalah salah satu jenis logam yang paling banyak digunakan dalam bidang teknik (Bahtiar dkk, 2017)
In many industrial components which made of steel such as lathe gears, most of it’s were usually use medium carbon steel
Low carbon steel material has a carbon content of less than 0,3%, so it has poor tensile, less hardness and less friction resistance. It strength can be increased by adding carbon, namely by means of solid carburizing and hardening process
Summary
Baja adalah salah satu jenis logam yang paling banyak digunakan dalam bidang teknik (Bahtiar dkk, 2017). Proses yang dilakukan adalah menggunakan baja karbon rendah, selanjutnya untuk meningkatkan kekerasan permukaanya dilakukan proses pengerasan permukaan (surface hardening), yang salah satu metodenya adalah pack carburizing. Beberapa pengembangan menggunakan metode Pack Carburizing dilakukan oleh para peneliti seperti Dian Yezhi dkk (2013), Adi Dermawan dkk (2017), Efrizal dkk (2018)) agar dalam pembuatan roda gigi menghasilkan roda gigi yang baik, hal ini disebabkan dalam dunia industri banyak sekali roda gigi yang rusak, aus, patah, dikarenakan roda gigi tersebut tidak kuat terhadap gesekan dan tekanan yang dihasilkan saat dua roda gigi bersinggungan pada saat mesin bekerja. Tujuan dari proses pack carburizing adalah untuk menghasilkan permukaan baja yang keras dan tahan aus, sedangkan pada bagian inti tetap memiliki keuletan. Beberapa penelitian sebelumnya (Sujita, 2016) menggunakan Metode Pack Carburizing untuk meningkatkan kekerasan dari spesimen yang digunakan
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
