Comparison of The Effect of N2 Gas Content and Annealing Temperature of Chromium Nitride Thin Films on the Surface Hardness of CK35 Steel. مجلة العلوم الهندسية [Internet]. 2025 Feb. 18 [cited 2026 Jun. 18];41(1). Available from: https://journal.damascusuniversity.edu.sy/index.php/engj/article/view/6832