Sydorchuk ОМ, Bykov ОІ, Pozniy АП. Tempering brittleness of die steel 4Kh4N5М4F2. momjournal [Internet]. 2021 Sep. 30 [cited 2026 Sep. 29];27(3):57-61. Available from: https://momjournal.org.ua/index.php/mom/article/view/125