Улучшение эксплуатационных свойств деталей лазерным поверхностным легированием
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Дата
2015
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
НТУ "ХПІ"
Анотація
Разработка новых ресурсосберегающих, экологически чистых технологий поверхностного легирования является важной задачей на сегодняшний день. Целью данной работы является изучение и анализ данных по лазерному легированию, что позволит в дальнейшем решить проблему значительной длительности химико-термической обработки и ускорить процессы насыщения легирующими элементами благодаря новым видам поверхностных обработок. Показано, что лазерное легирование позволяет отойти от необходимости нагрева деталей до высоких температур и длительной выдержки при этих температурах, а, следовательно, и существенно снизить энергозатраты и не разупрочнять матрицу детали.
Development of new resource-saving, environmentally friendly technologies of surface alloying is an important task of our time. The aim of this work is the study and analysis of data on laser alloying, which will continue to to solve the main problem of chemical heat treatment and accelerate the processes of saturation of the alloying elements by creating new kinds of surface treatments. It is shown that laser alloying allows to depart from the required heating of the parts to a high temperature and long exposure at these temperatures, and, consequently, significantly reduce energy costs and prevent weakening of the matrix details. After analyzing the issues examined laser alloying, it is possible to draw the following conclusions: 1. Laser alloying increases the diversity of possible structures of the diffusion layers in comparison with traditional methods of chemical-thermal treatment. Phase composition of the layer can be controlled by adjusting the three main process parameters: the value of energoimpuls laser radiation, the amount of alloying of the coating and the degree of revocationdate laser beam. 2. Laser alloying leads to a significant hardening of the modified layer, wherein the hardness of the doping zones is determined mainly by the hardness of themselves chemical compounds. In the laser processing of the surface is observed the increase of wear resistance of steels. 3. The brittleness of high-strength zones laser alloying can be reduced through the development of various combined methods of surface hardening of parts. 4. Laser alloying of the coatings allows adjustment of the phase composition of the hardened layer and the transition zone, microhardness and its distribution by varying the composition of the saturating mixture. 5. In combined treatment, including laser and chemical-thermal treatment, as well as in multicomponent alloying of the coatings are formed of modified layers having corrosion resistance in most acids.
Development of new resource-saving, environmentally friendly technologies of surface alloying is an important task of our time. The aim of this work is the study and analysis of data on laser alloying, which will continue to to solve the main problem of chemical heat treatment and accelerate the processes of saturation of the alloying elements by creating new kinds of surface treatments. It is shown that laser alloying allows to depart from the required heating of the parts to a high temperature and long exposure at these temperatures, and, consequently, significantly reduce energy costs and prevent weakening of the matrix details. After analyzing the issues examined laser alloying, it is possible to draw the following conclusions: 1. Laser alloying increases the diversity of possible structures of the diffusion layers in comparison with traditional methods of chemical-thermal treatment. Phase composition of the layer can be controlled by adjusting the three main process parameters: the value of energoimpuls laser radiation, the amount of alloying of the coating and the degree of revocationdate laser beam. 2. Laser alloying leads to a significant hardening of the modified layer, wherein the hardness of the doping zones is determined mainly by the hardness of themselves chemical compounds. In the laser processing of the surface is observed the increase of wear resistance of steels. 3. The brittleness of high-strength zones laser alloying can be reduced through the development of various combined methods of surface hardening of parts. 4. Laser alloying of the coatings allows adjustment of the phase composition of the hardened layer and the transition zone, microhardness and its distribution by varying the composition of the saturating mixture. 5. In combined treatment, including laser and chemical-thermal treatment, as well as in multicomponent alloying of the coatings are formed of modified layers having corrosion resistance in most acids.
Опис
Ключові слова
ресурсосберегающие технологии, химико-термическая обработка, упрочнение детали, износостойкость сталей, surface laser alloying, chemical heat treatment, hardening details
Бібліографічний опис
Акимов О. В. Улучшение эксплуатационных свойств деталей лазерным поверхностным легированием / О. В. Акимов, А. Ф. Адан // Вестник Нац. техн. ун-та "ХПИ" : сб. науч. тр. Темат. вып. : Новые решения в современных технологиях. – Харьков : НТУ "ХПИ". – 2015. – № 39 (1148). – С. 3-8.