Research on the possibility of controlling the properties of the structural steel surface hardening methods

Authors

  • A. P. Cheiliakh Department of Metal Science and Heat Treatment of Metals, State Higher Education Establishment “Pryazovskyi State Technical University”, Mariupol, University St., 7, 87500, Mariupol, Ukraine, Ukraine
  • N. E. Karavaiev Department of Metal Science and Heat Treatment of Metals, State Higher Education Establishment “Pryazovskyi State Technical University”, Mariupol, University St., 7, 87500, Mariupol, Ukraine, +38(098)2161460, Ukraine

Keywords:

Carburizing, hardening, the metastable residual austenite, wear resistance

Abstract

Purpose. For cleaning small castings are widely used blast units machines periodic action. Working capacity these machines is mainly determined by the durability of working bodies that are experiencing Shock intensity abrasive wear. Needs some regime of surface hardening, as a result of which you can increase the wear resistance of the blades shot blasting machines and thereby reduce the expense for their manufacturing and replacement. Methodology. Proposed regime of surface hardening is carburizing and holding followed hardening from different temperatures. This surface treatment allows to obtain in the structure along with martensite and carbides large amount of residual austenite (Ares), that undergoes deformation martensite transformation in wear (DMPW) in the contact zone. Findings. It is shown that by changing the temperature of the hardening can be controlled phase composition, the number of metastable residual austenite and mechanical properties of carburized steel. Residual austenite in this case, is not reduced, as is commonly believed, but rather increases the abrasive wear resistance of carburized steel. It was found that to improve the wear resistance of steels surface treatment should be aimed at obtaining a surface layer of metastable austenitemartensite- carbide structure in which metastable residual austenite capable of DMPW. DMPW causes additional self-strengthening of surface layers of the working means and the formation of a particulate solid a martensite deformation compared with martensite hardening. Determined the optimal hardening regimes that improve wear resistance of parts 3-4 times. Originality. Developed new regimes of surface hardening low alloy steel. Practical value. Conducted production tests of the blades of steel shot blasting systems 20Mn, heat-treated using new regimes of hardening, showed that these details have a lifespan of up to 90-96 hours, which is 3-4 times the service life of the blades that are used in manufacturing without treatment.

Author Biography

A. P. Cheiliakh, Department of Metal Science and Heat Treatment of Metals, State Higher Education Establishment “Pryazovskyi State Technical University”, Mariupol, University St., 7, 87500, Mariupol, Ukraine

Dr. Sc. (Tech.), Prof

References

Щербицкий А.М. Эффективный материал для лопастей дробеметных аппаратов / А.М. Щербицкий, Омар Мохамед Абулгани // Восточно-Европейский журнал передовых технологий. - №4. - С. 32-33.

Scherbitsky A.M. Effective material for of the blades shot blasting machines / A.M. Scherbitsky, Omar Mohamed Abulgani // East European Journal of advanced technologies. - №4. - pp 32-33.

Чейлях А.П. Экономнолегированные метастабильные сплавы и упрочняющие технологии / А.П. Чейлях. - Мариуполь: издательство ПГТУ. - 2009. - 483 с.

Cheiliakh A.P. Sale-alloyed metastable alloys and hardening technology / A.P. Cheiliakh. - Mariupol: publishing PSTU. - 2009. - 483 p.

Малинов Л.С. Влияние цементации и последующей термообработки на структуру, фазовый состав и абразивную стойкость Fe-Cr-Mn сталей / Л.С. Малинов, А.П. Чейлях, Е.Л. Малинова // Изв. АН СССР. Металлы. - 1991. - № 1. - С. 120-122.

Malinov L.S. Effect of carburizing and subsequent heat treatment on the structure, phase composition and abrasion resistance Fe-Cr-Mn of steels / L.S. Malinov, A.P. Cheiliakh, E.L. Malinova // Math. USSR Academy of Sciences. Metals. - 1991. - № 1. - pp 120-122

О роли остаточных напряжений в повышении предела выносливости стали при химико-термической обработке / Б.Г. Гуревич, С.Ф. Юрьев // М.: Машгиз, 1952. С. 43-63.

On the role of residual stresses in increasing the endurance limit of steel with chemical-thermal treatment / B.G. Gurevich, S.F. Yuriev // M.: Mashgiz, 1952. pp 43-63.

А.Д. Ассонов. Технология термической обработки деталей машин. - М.: Машиностроение, 1969. - 120 с.

A.D. Assonov. Technology heat treatment of machine parts. - M .: Engineering, 1969. – 120

Попов В.С. Структурные изменения в нестабильно аустенитных сталях при абразивном изнашивании / В.С. Попов, Н.Н. Брыков // МиТОМ. - 1971.- № 9. - С. 54-55.

V.S. Popov Structural changes in the unstable austenitic steels with abrasive wear / V.S. Popov, N. Brykov // MandHTM. - 1971. - № 9. - pp 54-55.

Малинов Л.С. Повышение абразивной износостойкости цементированных сталей 18ХГТ и 12ХНЗА за счет получения метастабильного аустенита / Л.С. Малинов, Е.Л. Малинова, Е.Я. Харланова // Металлы.- 1993. - № 2. - С. 108-111.

Malinov L.S. Increasing the abrasive wear resistance carburized of steels 18CrMnTi and 12CrNi3 by obtaining metastable austenite / L.S. Raspberries, E.L. Raspberry, E.Y. Harlanova // Metals. - 1993. - № 2. - pp 108-111.

Геллер А.Л. Остаточный аустенит и износостойкость легированных цементованных сталей / А.Л. Геллер, В.Н. Юрко // Изв. ВУЗов. Черная металлургия.- 1991. - №6. - С. 66-69.

Geller A.L. Residual austenite and wear resistance of carburized of steels alloyed / A.L. Geller, V.N. Yurko // Math. Colleges and universities. Iron and steel. - 1991. - №6. - pp 66­69.

Published

2015-04-20

Issue

Section

Proceedings in memory of Starodubov