Effect of Chromium Doping to Hardness Properties in the Manufacture of Spur Gears Made from Ferrous Powder. JTM [Internet]. 31 Oktober 2020 [dikutip 18 Agustus 2025];10(2):109-13. Tersedia pada: https://jtm.itp.ac.id/index.php/jtm/article/view/390