Electrometallurgy Today, 2022, №03



2022 №03 (03)

DOI of Article 10.37434/sem2022.03.04

2022 №03 (05)

---

Electrometallurgy Today (Sovremennaya Elektrometallurgiya), 2022, #3, 23-28 pages

Recycling of used noncompact tools from high-speed steel by electroslag remelting

E.O. Pedchenko, Yu.V. Kostetskyi, V.L. Petrenko, L.B. Medovar

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., Kyiv, 03150, Ukraine. E-mail: office@paton.kiev.ua

Abstract
Results of experiments on electroslag remelting of used small tools from high-speed steel of R6M5 grade are considered. Rationality of application of remelting by a double-circuit scheme is shown, which allows producing an ingot with a high quality surface and chemical composition, corresponding to that of R6M5 steel. During experiments, remelting of electrodes, formed from used drills (broaches), mills and cutters of up to 0.2 m size was performed. Remelting into a current-supplying T-shaped mould with forming part diameter of 0.18 m was conducted. Shown is the possibility of performing remelting of consumable electrodes with the cross-sectional area, changing along the electrode length, while maintaining a stable electric mode at distribution of the supplied power between the current-supplying mould and consumable electrode (75 and 25 %) and obtaining high-quality ingots without surface defects under such conditions. Ref. 17, Table. 3, Fig. 5.
Keywords: electroslag remelting; double-circuit scheme; recycling; high-speed steel; ingot; remelting productivity; ingot quality

Received 21.06.2022

References

1. Lore, J.D. (1974) Electrical conductivity measurements of molten-salt fluxes from an electroslag remelting process. Oak Ridge Y-12 Plant. https://doi.org/10.2172/4261739
2. Björkman, B., Samuelsson, C. (2014) Chapter 6. Recycling of steel. Handbook of Recycling, 65?83. https://doi.org/10.1016/B978-0-12-396459-5.00006-4
3. Birat, J.-P. (2015) Life-cycle assessment, resource efficiency and recycling. Metallurgical Research & Technology, 112(2), article 206. https://doi.org/10.1051/metal/2015009
4. Medovar, L.B., Chernets, A.V., Grabovsky, Ts.F. et al. (2000) Experience of production and application of high-speed rolls of ESS LM. Problemy Spets. Elektrometallurgii, 3 , 3-9 [in Russian].
5. (1976) Electroslag furnaces. Ed. by B.E. Paton, B.I. Medovar. Kyiv, Naukova Dumka [in Russian].
6. Fishman, K.K., Orlovsky, Yu.V., Fedorovsky, B.B. (1989) Electroslag chill casting in repair and tool production. Kyiv, Znanie [in Russian].
7. Mitchell, A., Jackson, R.O. Ballantyne, A.S. (1975) Macrosegregation, fluid motion and heat transfer in ESR process. In: Proc. of 4th Int. Symp. on Electroslag Remelting Technology (Japan, Tokyo, 7-8 June 1973). Kyiv, Naukova Dumka, issue 3, 29-38 [in Russian].
8. Abdellah Kharicha, Andreas Ludwig, Menghuai Wu (2014) On melting of electrodes during electroslag remelting. ISIJ Int., 54(7), 1621-1628. https://doi.org/10.2355/isijinternational.54.1621
9. Tsykulenko, A.K., Lantsman, I.A., Medovar, L.B. et al. (2000) Bifilar circuit of consumable electrode electroslag remelting. Problemy Spets. Elektrometallurgii, 3, 16-20 [in Russian].
10. Ksyondzyk, G.V., Frumin, I.I. Shirin, V.S., Kuskov, Yu.M. (1982) Current-supplying mould. USSR author`s cert. 343538922-02. Fill. 12.05.82 [in Russian].
11. Ksyondzyk, G.V., Frumin, I.I. Shirin, V.S. (1964) Current-supplying mould. USSR author`s cert. 264427. Fill. 19.11.64 [in Russian].
12. Ksyondzyk, G.V. (1974) Current-supplying mould, providing the slag pool rotation. Spets. Elektrometallurgiya, 27, 32-40 [in Russian].
13. Medovar, L.B., Tsykulenko, A.K., Chernets, A.V. et al. (2000) On formation of surface of ingots from nickel superalloys during ESR in current-supplying mould. Problemy Spets. Elektrometallurgii, 4, 7-14 [in Russian].
14. Kuskov, Yu.M., Solovjev, V.G., Lentyugov, I.P., Zhdanov, V.A. (2018) Role of slag pool in process of surfacing in current-carrying mould. Suchasna Elektrometal., 2 , 41-44 [in Russian]. https://doi.org/10.15407/sem2018.02.05
15. Medovar, L.B., Tsykulenko, A.K., Chernets, A.V. et al. (2000) Investigation of influence of parameters of ESR bifilar circuit on sizes and shape of metal pool. Problemy Spets. Elektrometallurgii, 4, 3-7 [in Russian].
16. Haibo Cao, Zhouhua Jiang, Yanwu Dong et al. (2020) Effect of single power two circuits electroslag remelting process on the cleanliness of the remelted ingot. ISIJ Int., 60(2), 247-257. https://doi.org/10.2355/isijinternational.ISIJINT-2019-450
17. GOST 19265-73: Bars and strips of high-speed steel [in Russian].

---

Advertising in this issue:

---