ООО "НПЦ Магнитной гидродинамики"

Россия, Красноярский Край, Красноярск,  

ул. Академика Киренского, 9А, пом.225

+7 (391) 2-181-408

kalpush@mail.ru

«RPC Magnetic hydrodynamics», LLC

Russia, Krasnoyarsk Territory, Krasnoyarsk,

Akademika Kirenskogo str., 9А, b.225

+7 (391) 2-181-408

kalpush@mail.ru

© 2016-2019 НПЦ Магнитной гидродинамики

RPC

MAGNETIC

HYDRODYNAMICS

 

Main directions:

Engineering activities concerning designing and commissioning of melting-casting equipment for aluminium alloys production

Fabrication and supply of electrical heating systems for the equipment of metallurgical purposes

MHD devices and technologies of metallurgical purposes

Fabrication of refractory pre-cast shapes for the aluminium industry

Technology of production of wire rod with highly dispersed structure made from special aluminium alloys for aerospace and machine building industries

RPC Magnetic hydrodynamics Ltd. specialists commissioned melting-casting line with electromagnetic crystallizer (EMC) for experimental operation, it is intended for production of the rod with 8-12 mm diameter and overall weight of one  spool is up to 80 kg. Company's engineers set up rod production of following alloys: Al-Si, Al-Mg, Al-Mg-Si, Аl-Mg-Sc-Zr, Al-Cu-Mn-Mg. These rods are for future processing of draw a wire from them.

Melting-casting line

The spool of ready-made 10 mm diameter rod

TECHNOLOGY DESCRIPTION

The essence of this technology is a molten alumimum solidification inside electromagnetic field with direct supply of cooling water to ingot rod. Due to this 8-12 mm diameter rod forms without any contacts with a mold   with very high cooling speed and under the influence of magnetic hydrodynamic exposure at interphase boundary, which results in achieving a unique structure of ready-made product.

OPERATING PRINCIPLE

Aluminum alloy is prepared in the melting furnace (1), chemical composition and temperature uniformity are provided by the usage of the MHD-stirrer (2). Molten metal from the melting furnace (1) goes to the dosing trough (3), where required temperature and metal level are maintained. Through the dosing nozzle of the trough  molten metal goes to electromagnetic crystallizer (4), where electromagnetic field plays a role of contactless mould. Coolant from cooling reservoir (5) is supplied to workpiece directly, which provides high cooling speed and as a result we get continuous processed product  (6). 

Melting-casting line schematics

ADVANTAGES OF ROD WHICH IS CASTED IN ELECTROMAGNETIC CRYSTALLIZER

- rod casted through electromagnetic crystallizer has 100 times less dendtritic parameter, than rod which is casted in direct chill mold;

- there is almost no dendritic segregation in rod ingots;

- due to high solidification speed an extension of solid solutions concentration areas happens as well as eutectic and peritectic points displacement happens, which makes it possible to develop new alloys and achieve existing alloys higher mechanical properties;

- electromagnetic casting as distinct from granula casting technology makes it possible to get semi-finished product for further processing (there is no necessity to treat and sinter granulas);

- further rod plastic deformation results in nanodispersed eutectic formation, which makes it possible to fabricate up to 0,10 mm diameter wire made from special aluminium alloys;

- unique properties of electromagnetic casting are the lack of non-metallic impurities which result in high quality product.

Alloy condition before casting in electromagnetic  crystallizer

interdendritic

porosity

crude primary

intermatillic

    oxide scab 

Alloy condition after casting in electromagnetic  crystallizer

Eutectic structure without primary intermetallic and oxides

Unique properties of electromagnetic casting are the lack of non-metallic impurities which result in high quality product.

CASTED ROD PROPERTIES AND STRUCTURE EXAMPLES

This alloy is intended for substitution of copper wire on aluminium wire for aircrafts. Technology of casting in electromagnetic crystallizer provides  the possibility of fabrication of heat-resistant electrotechnical aluminium wire.

 

Microstructure of 01417м alloy is uniform, dispersed throughout the cross-section, there no primary intremetallic. Microstructure is  basically α-solid solution, where disperse eutectic (α+AlnMe) is at dendritic cells boundary. The smallest size of dendritic cell is 4,1 mcm.

01417м Alloy

8 mm diameter rod macrostructure

01417м Alloy rod

Strength, MPa

Elongation, %

Admissible temperature, C. 

-

up to 250 C

15-24

15

185-210

190

8 mm diameter rod

0,5 mm diameter rod

DEVELOPMENT PROSPECTS

RPC Magnetic hydrodynamics Ltd. is happy to cooperate with all the companies, which are interested in joint development and introduction of the products with unique physical mechanical properties to industry.

RPC Magnetic hydrodynamics Ltd. can provide following services:
- experimental and industrial rod batches fabrication services;
- scientific research for new alloys development for casting in EMC.

RPC Magnetic hydrodynamics Ltd. engineers have designed melting-casting line
for wire rod fabrication with the diameter up to 12 mm made from special aluminium alloys. Annual production capacity is more than 500 tons.

 

Modification of working holding furnaces 

Fabrication of laboratory facilities for vocational education and training institutes of all the levels

Mathematical and physical simulation of electromagnetic, thermal and hydrodynamics processes within metallurgical equipment