Abstract
The article analyzes scientific literature, describes basic wear mechanisms of dies for cold pressing powders and presents innovative methods of hardening dies for pressing hard-composite materials. On the basis of the review of domestic and foreign scientific literature and experimental results of the Institute of Hydrodynamics, named after Lavrentyev (Siberian Branch of the Russian Academy of Sciences), the authors offer methods for improving wear resistance and toughness of dies, such as detonation spraying and cold spraying. Additionally, the article outlines the detonation spraying process with the help of the Russian automated complex CCDS 2000 and compares cold spraying with other known coating methods. The authors also consider the main problem of coating dies for pressing hard-composite powder materials by means of detonation spraying and cold spraying. The authors describe the dependence of the quality of coating on certain factors. The theme discussed is urgent for science and many branches of industry since the increase of wear-resistance, toughness and service life allows to reduce production costs and time for machine servicing.
Highlights
Развитие техники и, в частности, машиностроения придает проблеме уменьшения изнашивания инструментальной оснастки огромную значимость с точки зрения экономии материальных ресурсов
Kim G.E. Mechanical Characteristics of Al-Co-Ce Coatings Produced by the Cold Spray Process
Properties of SiC-Reinforced Aluminum Alloy Coatings Produced by the Cold Spray Deposition Process
Summary
Лаврентьева СО РАН, предложены детонационное напыление и холодное газодинамическое напыление покрытий как способы повышения износостойкости и прочности пресс-форм. Холодное газодинамическое напыление (ХГН) является методом термического напыления металлических и металлокерамических покрытий в основном за счет кинетической энергии газа проходящего через сопло Лаваля, а также подогрева порошка до температур, существенно ниже температуры плавления. Что наличие высоких температур в струе не является обязательным условием и покрытия можно получать из частиц, имеющих температуру значительно меньше их температуры плавления, а это открывает широкие возможности для создания новых технологий и техники напыления [15]. Sansoucy E., Jodoin B., Kim G.E. Mechanical Characteristics of Al-Co-Ce Coatings Produced by the Cold Spray Process. Properties of SiC-Reinforced Aluminum Alloy Coatings Produced by the Cold Spray Deposition Process.
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