Abstract
The work objective is to search for new non-conventional structural low-activated materials. The dispersion-strengthened microalloyed chrome-based alloys that show high mechanical-and-physical properties under the initial condition are described. The results of the comparative studies of the chromium structural behavior obtained by the galvanic and hot spraying methods applied to the piston rings are quoted. This allows identify and assess the advantages of these coatings depending on the performance. Chromium rings wear - engine operating time experimental dependences are shown. The results of the quick and full-scale testing of various engines to determine the effect of the chromium coating composition on the size and behavior of the friction factor depending on the load are described. The feasibility of applying the diesel piston ring coatings under study is assessed.
Highlights
1,3,4 Российский государственный аграрный университет — МСХА имени К
The results of the comparative studies of the chromium structural behavior obtained by the galvanic and hot spraying methods applied to the piston rings are quoted
This allows identify and assess the advantages of these coatings depending on the performance
Summary
1,3,4 Russian State Agrarian University – Moscow Timiryazev Agricultural Academy, Moscow, Russian Federation 2 Don State Technical University, Rostov-on-Don, Russian Federation. The results of the comparative studies of the chromium structural behavior obtained by the galvanic and hot spraying methods applied to the piston rings are quoted This allows identify and assess the advantages of these coatings depending on the performance. О высоких характеристиках этих покрытий по антифрикционным свойствам свидетельствуют: — результаты исследований характеристик трения и износа хромовых покрытий в условиях работы деталей цилиндропоршневой группы высокофорсированного дизельного двигателя [12,13,14]; — опыт эксплуатации поршневых колец. Целью работы является разработка прогрессивных технологий нанесения газотермических защитных покрытий на поршневые кольца дизельных двигателей при работе в условиях высоких температур и давлений, а также оценка возможности их применения взамен гальванического хромирования. Основными задачами исследования являются: — определение физико-механических свойств и эксплуатационных характеристик хромовых покрытий применительно к работе поршней и поршневых колец; — оценка влияния этих покрытий на технико-экономические характеристики дизельных двигателей.
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