Analisa Pengaruh Proses Pack Carburizing Terhadap Nilai Kekerasan Pada Bearing

Bearings are machine components that function to reduce friction and support rotational loads. In their application, bearings must possess high wear resistance and surface hardness. This study aims to analyze the effect of the pack
carburizing process on the hardness value of high-carbon steel bearings (type 6203 2RS). The process was carried out using mangrove charcoal as the carbon source
at a temperature of 920°C with a holding time of 1 hour, followed by quenching in well water. Hardness testing using the Rockwell method on the HRC scale was
performed on three bearing components: the Outer ring, Inner ring, and Rolling ball. The results showed a relatively small increase in hardness, with the Outer ring increasing by 0.46 HRC (from 61.55 HRC to 62.01 HRC), the Inner ring increasing by 0.60 HRC (from 60.40 HRC to 61.00 HRC), and the Rolling ball increasing by 1.07 HRC (from 56.10 HRC to 57.17 HRC). This increase is considered low, indicating that the applied pack carburizing process was less effective in
significantly enhancing the material’s hardness, possibly due to suboptimal process parameters or the already high initial hardness of the bearing material.