Surface microstructuring of hot-rolled carbon structural steels under complex exposure to laser radiation-Reference-Cited by-同舟云学术

Surface microstructuring of hot-rolled carbon structural steels under complex exposure to laser radiation

Published:2024-06-30 Issue:2 Volume:14 Page:8-21
ISSN:2223-1528
Container-title:Proceedings of the Southwest State University. Series: Engineering and Technology
language:
Short-container-title:jour

Author:

Minaev I. V.¹,Kutepov S. N.²,Klementyev D. S.²,Zhurba D. V.³,Golyshev I. V.¹

Affiliation:

1. OOO Scientific and Production Enterprise "Telar"

2. Tula State Pedagogical University named after L.N. Tolstoy

3. ITMO National Research University

Abstract

The purpose of the work was to study the effect of laser microstructuring modes of the cutting edge on changes in the structure and mechanical properties of the surface layer of parts made of hot-rolled structural carbon steels grades 20, 35, 45. Methods. Structural carbon steels of grades 20, 35, 45 were selected as objects of research. To study the effect of laser modification on changing the structure and mechanical properties of machine parts using laser cutting, special samples were made in the form of square plates (35×35 mm) with a thickness of 2 mm (St20 and St45) and 4 mm (St35). After laser cutting according to the modes, one of the sides of the sample was subjected to mechanical grinding in order to remove a layer with a modified structure of the material obtained during laser cutting. Next, laser microstructuring of the sample surfaces was performed using a continuous fiber laser. Metallographic and durometric studies were carried out to study the effect of laser microstructuring on changes in the structure and properties of the surface layer. Results. The regularities of the structure of the zone of laser action of structural carbon steels after laser microstructuring have been revealed, which consists of two layers: a non-etching (slightly etching) white layer, which is a finely dispersed martensite of a needle structure and immediately following it a zone of thermal influence, which, depending on the carbon content in the steel, has a different structure: ferrite-pearlite, martensitic, troostomartensitic, martensiticpearlitic. It has been established that laser microstructuring of a pre-polished surface in some cases leads to an increase in the values of microhardness and the length of the laser exposure zone, which may be associated with an increase in the absorption capacity of the material of the polished surface and, accordingly, a decrease in its reflectivity. Conclusion. The results obtained can be used in the creation of resource-saving material processing processes.

Publisher

Southwest State University

Reference20 articles.

1. Sergeev N.N., Minaev I.V., Tikhonova I.V., Kutepov S.N., Komarova M.Yu., Alyavdina E.S., et al. Fundamentals of laser and gas plasma processing of steel. Tula: TulSU Publishing House; 2017. 337 p. (In Russ.)

2. Grigoryants A.G. Fundamentals of laser processing of materials. Moscow: Nauka; 1989. 304 p. (In Russ.)

3. Kovalenko V.S., Golovko L.F., Chernenko V.S. Hardening and alloying of machine parts with a laser beam. Kiev: Tekhnika; 1990. 192 p. (In Russ.)

4. Veiko V.P., Kishalov A.A., Mutin T.Y., Smirnov V.N. Prospects of industrial applications of laser cleaning of materials. Nauchno-tekhnicheskij vestnik informacionnyh tekhnologij, mekhaniki i optiki = Scientific and Technical Bulletin of information Technologies, Mechanics and Optics. 2012;(3):50–54. (In Russ.)

5. Suslov A.G. The quality of the surface layer of machine parts. Moscow: Mashinostroenie; 2000. 320 p. (In Russ.)