Effect of combining continuous casting and simultaneous solidliquid metal deformation on the structure and properties of alloy V95 products

It is known that the solidification of melts under the influence of external factors leads to the formation of a fine-grained structure in the work pieces which improves the mechanical characteristics of finished metal products. The production of lengthy profiles with a high level of mechanical properties in a short production cycle is a complex interdisciplinary task of great practical importance. The paper presents results of research of the properties of products from aluminum alloy V95, which were obtained by continuous vertical casting combined with deformation in the solid-liquid state during solidification. A diagram of a device that implements such a process of combining is presented; its operation is reviewed. Also, a description is given of a method for producing flat work pieces and sample preparation for studying their mechanical characteristics and microstructure.

As research shows the metal products have a fine-grained structure with a dense directional arrangement of dislocations. The grain boundaries are wide, uneven, consisting of grids and dislocation plexuses. During the melt solidification a thin directional dislocation structure is formed in the crystallizer of the device providing increase of the mechanical characteristics of metal products without additional processing, and there are no shrinkage defects. The possibility of obtaining long metal products with high mechanical characteristics for a short production cycle with reduced power costs was shown.

1. B r o v ma n , M . Y a ., Sovmeshchennye protsessy nepreryvnogo litya i prokatki [The combined processes of continuous casting and rolling], Saarbrucken: LAP LAMBERT Academic Publishing, 2014.

2. M a ma d z h a n o v , K h . A . , S e rge e v a , A . M . , M a n su r o v , S .Y u . , M an su r o v , Yu . N ., Osobennosti tekhnologii nepreryvnogo litya alyuminievykh splavov i otsenki ee effektivnosti [Features of the technology of continuous casting of aluminum alloys and evaluation of its effectiveness], Tsvetnye metally, 2018, No 12, pp. 6–13.

3. S e r g e ev a , A .M . , L o v i z in , N . S . , S o s n i n , A . A ., Struktura i mekhanicheskie svoystva ploskikh zagotovok iz splava AD1, poluchennykh v usloviyakh nepreryvnogo litya, sovmeshchennogo s deformatsiey v tverdozhidkom sostoyanii [Structure and mechanical properties of flat blanks made of AD1 alloy obtained under continuous casting combined with deformation in a solid-liquid state], Voprosy Materialovedeniya, 2017, No 1 (89), pp. 84–91.

4. State Standard GOST 4784-97: Alyumini i splavy alyuminievye deformiruemye. Marki [Aluminum and deformable aluminum alloys. Stamps], Moscow: Standartinform, 2009.

5. S e r g e ev a , A .M . , L o v iz in , N . S . , S o s n i n , A . A ., Tekhnologiya sovmeshcheniya vertikalnogo nepreryvnogo litya alyuminievykh splavov s odnovremennoy ikh deformatsiey [Technology for combining vertical continuous casting of aluminum alloys with their simultaneous deformation], Metallurg, 2018, No 3, pp. 72–76.

6. S e r g e ev a , A .M . , L o v i z in , N . S . , S o s n i n , A . A ., O sovmeshchennoy tekhnologii nepreryvnogo litya alyuminievykh splavov s odnovremennoy deformatsiey metalla [On the combined technology of continuous casting of aluminum alloys with simultaneous deformation of metal], Aviatsionnye materialy i tekhnologii, 2018, No 2, pp. 9–16.

7. G a b id u l l in , R .M . , L i v an o v , V . A . , S h i p i lo v , V . S ., Nepreryvnoe litye alyuminievykh splavov [Continuous casting of aluminum alloys], Moscow: Metallurgiya, 1977.

8. State Standard GOST 21073.0-75: Metally tsvetnye. Opredelenie velichiny zerna. Obshchie trebovaniya [Non-ferrous metals. Determination of grain size. General requirements], Moscow: Standards Publishing House, 1976.

9. State Standard GOST 1986-01-01: Metally. Metody ispytaniy na rastyazhenie [Metals. Tensile Test Methods]: Moscow: Standartinform, 2008.

10. State Standard GOST 9012-59: Metally. Metod izmereniya tverdosti po Brinellyu [Metals. Brinell hardness testing]: Moscow: Standartinform, 2007.

11. State Standard GOST 2789-73: Sherokhovatost poverkhnosti. Parametry i kharakteristiki [Surface roughness. Parameters and specifications]: Moscow: Standartinform, 2006.

12. Arch ak ov a, Z.N., B a lakh on ts e v , G . A . , Bas o v a , I . G . , e t a l ., Struktura i svoystva polufabrikatov iz alyuminievykh splavov [Structure and properties of semi-finished products from aluminum alloys]: handbook, Moscow: Metallurgiya, 1984.

13. B e l e ts k y, V .M . , K r i v o v , G . A ., Alyuminievye splavy. Sostav, svoystva, tekhnologiya, primenenie [Aluminum alloys. Composition, properties, technology, application]: handbook, Kiev: KOMINTEKH, 2005.

14. K o r os t el e v , V. F . , K h r o mo v a , L . P ., Vliyanie davleniya, nakladyvaemogo na zhidky metall, na formirovanie nanokristallicheskoy struktury metallov [The effect of pressure applied to a liquid metal on the formation of a nanocrystalline metal structure], Nano- i mikrosistemnaya tekhnika, 2015, No 3, pp. 58–61.

15. S e me n o v , A .B. , S e me n o v , B. I ., Tendentsii razvitiya i nauchno-tekhnicheskie osnovy spetsialnykh sposobov litya [Development trends and scientific and technical foundations of special casting methods], Metallurgiya mashinostroeniya, 2015, No 6, pp. 41–47.