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Metal Science and Metallography
ArticleName Influence of heat treatment mode on the structure of 07Kh25N13 austenitic steel obtained by the WAAM method
DOI 10.17580/chm.2024.02.10
ArticleAuthor Yu. G. Kabaldin, S. A. Sorokina, M. A. Chernigin, Yu. S. Mordovina, S. V. Perova
ArticleAuthorData

Nizhny Novgorod State Technical University named after. R. E. Alekseev, Nizhny Novgorod, Russia
Yu. G. Kabaldin, Dr. Eng., Prof., Dept. of Technology and Equipment of Mechanical Engineering, Institute of Manufacturing Technologies in Machine Building
S. A. Sorokina, Cand. Eng., Associate Prof., Dept. of Materials Science, Materials Technologies and Heat Treatment of Metals, Institute of Physical and Chemical Technologies and Materials Science

Yu. S. Mordovina, Postgraduate Student, Engineer for the Educational Process of the Institute for Retraining of Specialists, Engineer of the Dept. of Technology and Equipment of Mechanical Engineering, Institute of Manufacturing Technologies in Machine Building


Nizhny Novgorod State Technical University named after. R. E. Alekseev, Nizhny Novgorod, Russia1Central Research Institute Burevestnik, Nizhny Novgorod, Russia2

M. A. Chernigin, Postgraduate Student, Engineer, Dept. of Technology and Equipment of Mechanical Engineering, Institute of Manufacturing Technologies in Machine Building1, Research Engineer of the 3rd Category2, e-mail: honeybadger52@yandex.ru

 

Nizhny Novgorod State Technical University named after. R. E. Alekseev, Nizhny Novgorod, Russia1RFNC – VNIIEF, Sarov, Russia2

S. V. Perova, Postgraduate Student, Dept. of Technology and Equipment of Mechanical Engineering, Institute of Manufacturing Technologies in Machine Building1, Industrial Engineer2

Abstract

Despite the fact that most products from austenitic steels are manufactured using cold plastic deformation (CPD) technologies, in the manufacture of products with complex configurations, the use of these technologies can be difficult, since the deformation of FCC metals at temperatures below recrystallization leads to a change in the structural-phase composition of the material and its physical and mechanical properties. Three-dimensional metal printing technologies make it possible to produce parts and structures of complex configurations using a minimum of shaping operations, almost completely eliminating the use of CPD. The behavior of the chemical composition of the starting material (wire) and the structure of metastable austenitic steel 07Kh25N13 during surfacing using the WAAM method and subsequent heat treatment is considered. It was revealed that when surfacing according to the used mode (I = 120 A, U = 24 V, V = 350 mm/min), the content of some alloying elements decreases, while the chemical composition of the steel does not exceed grade deviations. As a result of the study, it was established that during metal surfacing crystallization occurs according to the FA type with the formation of a coarse dendritic structure consisting of δ- and σ-phases. Post-surfacing austenitization at a temperature of 1070 °C practically does not change the structure. Increasing the temperature to 1100 °C leads to a decrease in the size of dendrites and the formation of austenite grains. On the milled surfaces of the samples, a more active formation of austenite grains occurs, which may be due to the occurrence of recrystallization processes during heating of the work-hardened metal. In this regard, it can be assumed that preliminary hardening and post-surfacing austenitization have a positive effect on the structure formation of the material after three-dimensional printing.

keywords Austenitic steel 07Kh25N13, additive technologies, WAAM, steel structure formation, δ-ferrite, heat treatment
References

1. Chernigin M. A., Sorokina S. A., Vorobyov R. A. Study of the microstructure of metastable austenitic chromium-manganese steel 14Kh15G9ND using optical and electron microscopy. Zavodskaya laboratoriya. Diagnostika materialov. 2023. Vol. 89. No. 4. pp. 38–44. DOI: 10.26896/1028-6861-2023-89-4-38-44
2. Bolshakov V. I., Sukhomlin G. D., Laukhin D. V. Atlas of metal and alloy structures. Dnepropetrovsk : PGASA, 2010. 174 p.
3. Andrushevich A. A. Atlas of microstructures of ferrous and non-ferrous metals : educational visual aid. Minsk : BGATU, 2012. 100 p.
4. Gulyaev A. P. Metal science. Moscow : Metallurgiya, 1986. 544 p.
5. Gonchar A. V., Klyushnikov A. A., Mishakin V. V. Influence of plastic deformation and subsequent heat treatment on the acoustic and electromagnetic properties of steel 12Kh18N10Т. Zavodskaya laboratoriya. Diagnostika materialov. 2019. Vol. 85. No. 2. pp. 23–28. DOI: 10.26896/1028-6861-2019-85-2-23-28
6. Fetisov G. P., Karpman M. G. et al. Materials science and metal technology. Moscow : Vysshaya shkola, 2002. 638 p.
7. Suuatala N., Takalo T., Moisio T. The relationship between solidification and microstructure in austenitic and austenitic-ferritic stainless steel welds. Metallurgical and Materials Transactions A. 1979. Vol. 10. pp. 512–514. DOI: 10.1007/BF02697081
8. Kim Y. H., Kim D. G., Sung J. H., Kim I. S. et al. Influences of Cr/Ni equivalent ratios of filler wires on pitting corrosion and ductility-dip cracking of AISI 316l weld metals. Metals and Materials International. 2011. Vol. 17. pp. 151–155. DOI: 10.1007/s12540-011-0221-1
9. Jacob G. Prediction of solidification phases in Cr – Ni stainless steel alloys manufactured by laser based powder bed fusion process. NIST Advanced Manufacturing Series (NIST AMS). 2018. Vol. 100–114. pp. 1–38. DOI: 10.6028/NIST.AMS.100-14
10. Olson D. L. Prediction of austenitic weld metal microstructure and properties. Welding Research Supplement. 1985. Vol. 64. pp. s281–s295.
11. Sindo K. Welding Metallurgy. 2nd ed. New York : Willey, 2003. 480 p.
12. Kovalenko V. S. Metallographic reagents : reference book Moscow : Metallurgiya, 1981. 120 p.
13. Beckert M., Klemm H. Handbuch der metallographischen Aetzverfahren. Translated from German. Moscow : Metallurgiya, 1988. 400 p.
14. Panchenko E. V. Metallography laboratory. Moscow : Metallurgiya, 1965. 441 p.
15. GOST 2246–70. Welding steel wire. Specifications. Introduced: 01.01.1973.
16. Chen X., Li J., Cheng X., He B. et al. Microstructure and mechanical properties of the austenitic stainless steel 316L fabricated by gas metal arc additive manufacturing. Mater. Sci. Eng. A. 2017. Vol. 703. pp.567–577. DOI: 10.1016/j.msea.2017.05.024.
17. Nikitin K. V., Nikitin V. I., Timoshkin I. Yu., Glushchenkov V. A., Chernikov D. G. Treatment of melts with magnetic pulse fields to control the structure and properties of industrial silumins. Izvestiya vuzov. Tsvetnaya metallurgiya. 2016. No. 2. pp. 34–42. DOI: 10.17073/0021-3438-2016-2-34-42
18. Efimov A. V., Chernov V. P. Effect of external influences on the structure and properties of 150KhNM steel castings. Teoriya i tekhnologiya metallurgicheskogo proizvodstva. 2020. No. 2 (33). pp. 34–40.
19. Chernikov D. G., Glushchenkov V. A., Igolkin A. Yu., Nikitin K. V., Akishin S. A. Increasing the efficiency of casting processes in the production of aircraft engine parts by exposing the melt to a pulsed magnetic field. Vestnik SGAU. 2012. No. 5-1 (36). pp. 253–257.
20. Astafurov S., Astafurova E. Phase composition of austenitic stainless steels in additive manufacturing: A review. Metals. 2021. Vol. 11. 1052. DOI: 10.3390/met11071052
21. Kabaldin Y., Shatagin D., Ryabov D., Solovyov A., Kurkin A. Microstructure, phase composition, and mechanical properties of a layered bimetallic composite ER70S 6-ER309LSI obtained by the WAAM method. Metals. 2023. Vol.13. 851. DOI: 10.3390/met13050851

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