Comparison of The Effect of N2 Gas Content and Annealing Temperature of Chromium Nitride Thin Films on the Surface Hardness of CK35 Steel. Damascus University Journal for engineering sciences, [S. l.], v. 41, n. 1, 2025. Disponível em: https://journal.damascusuniversity.edu.sy/index.php/engj/article/view/6832. Acesso em: 18 jun. 2026.