The Institute of Metal Technology offers consumers the technology for the production of anti-friction silumin as a replacement for anti-friction bronze under a commercial agreement with technical assistance, the production of blanks and parts according to customer dimensions under a manufacturing agreement and is looking for partners to conclude a technical cooperation agreement.

Antifriction silumin (AC) is a light and wear-resistant aluminum-based alloy with high mechanical and anti-friction properties. AS in terms of friction wear resistance is not inferior to the most common Al-Fe bronzes (BrAZh9-4, etc.) and Pb-Zn-Sn bronzes (BrOTsS5-5-5, etc.) and can replace them in friction units (worm wheels, plain bearings , bushings).

A technology has been developed for manufacturing blanks from AS by casting with an increased solidification rate. This makes it possible to obtain workpieces with a diameter of up to 200 mm with a highly dispersed microstructure without the use of modifying ligatures and fluxes. Subsequent heat treatment in a special accelerated mode improves the tribotechnical properties of AS blanks. The obtained workpieces from AS, manufactured by the proposed technology, have an inverted microstructure with globular silicon crystals with a dispersion of 2..4 μm. Solid and hollow billets from AS are produced by continuous horizontal, cyclic and centrifugal casting methods. Methods for obtaining workpieces from AS are quite simple, productive and do not involve the introduction of expensive alloying elements.

The Institute of Technology of Metals can produce the following AS billets:
- solid cut-to-length cylindrical billets in diameters up to 200 mm and heights up to 150 mm;
- hollow billets with outer diameters from 90 to 200 mm;
-continuously cast bars with diameters from 40 to 80 mm.
Technical parameters of antifriction silumin billets:
- hardness - 125÷140 НВ;
- tensile strength - 350÷450 MPa;
- elongation - 4÷8 %;
- density - 2700 kg/m3.

Technical parameters	БрАЖ 9-4	Antifriction silumin
Material's density, kg/m3	7500	2700
Comparative wear resistance	1	4÷6
Mass of a billet (Ø100mm, length 100 mm), kg	5.9	2.2
Cost of a billet (Ø100mm, length 100 mm), $ USD	59	26.4

More details on the Institute's website (in Russian).

Additional information is posted in the Album of promising developments of organizations of the National Academy of Sciences of Belarus for the real sector of the economy (in Russian).

Special heat treatment of silumin workpieces in an accelerated mode makes it possible to obtain globular silicon crystals and improve the mechanical and tribological properties of parts. Antifriction silumin is superior to antifriction silumin analogues in terms of service life and frictional wear bronze; has high corrosion resistance and is insensitive to oil, gas condensate, gasoline, kerosene, water and atmospheric pollution.

The performance indicators correspond to the properties of antifriction bronzes, brasses and babbitts, which is the basis for the further promotion of parts made of antifriction silumin to the markets of the Republic of Belarus, Russian Federation and neighboring countries.

The technology for producing workpieces from antifriction silumin does not involve the introduction of expensive alloying elements and the use of environmentally unsafe impurity modifiers.

Methods for casting silumin blanks are quite simple and productive.

An innovative aspect is the technology of casting Al-Si alloys with globular silicon crystals with a dispersion of 4..6 microns evenly distributed in an aluminum matrix, developed at the State Scientific Institution “ITM NAS of Belarus” without the use of modifiers. Thanks to this microstructure, the resulting workpieces from AC are superior in mechanical and antifriction properties to those made from Al-Fe bronzes and Pb-Zn-Sn bronzes.

Worm and gear wheels made of AC are not inferior in mechanical properties to those made of bronze, and in anti-friction properties they are 4..6 times superior.

In terms of mechanical properties, billets made from AC are not inferior to those made from bronze, and in terms of antifriction properties they are 4..6 times superior. Workpieces made from AC are 2..2.5 times cheaper than similar bronzes made from Al-Fe and Pb-Zn-Sn, and their weight is 2.5..3 times lower.

At present, billets from AS have been introduced into production and are supplied to the enterprises of the Republic of Belarus: JSC "Plant" Optic "" (Lida), JSC "Belshina" (Bobruisk), RUPP "Machine-tool plant" Krasny Borets "" (B. Orsha), OAO Bobruiskselmash (Bobruisk), Production Association Gomselmash (Gomel), VS-Tekhnika (Polotsk), Transmaster (Mogilev) and Novaeks Plus (Mogilev), etc.

1. Anti-friction alloy based on aluminum: Pat. 17697 Rep. Belarus: IPC C 22C 21/04 / V. Yu. Stetsenko, E. I. Marukovich, A. I. Rivkin; date of publication 11/17/2011.(in Russian).
2. Anti-friction alloy based on aluminum: Pat. 2504595 Ross. Federation: MPK C22 C21/04 / V. Yu. Stetsenko, E. I. Marukovich; date of publication: 05/11/2012.(in Russian).

The Institute of Metal Technology is the leading scientific organization of the republic in the field of development and creation of resource-saving, environmentally friendly high-tech foundry technologies, and the production of modern materials for industrial enterprises.

The main directions of scientific and technical activities of the institute:
- Technologies for obtaining the structure and properties of powdered hard alloys based on tungsten, titanium, tantalum carbides with cobalt as a binder material;
- Methods for recycling and hardening of hard alloys in order to improve their quality performance characteristics;
- Processes for recycling high-speed steel scrap to obtain material for tool products;
- Development of theoretical foundations for controlling the processes of formation of the structure and properties of metals and alloys during their crystallization and solidification;
- Thermophysics and hydrodynamics of special types of casting;
- Creation of new materials and resource-saving technological processes for their production, processing and strengthening.

The results of fundamental research of the institute are presented in scientific publications and are used:
- when creating environmentally friendly resource-saving technologies for continuous casting of ingots from ferrous and non-ferrous alloys;
- development of new cast, including bimetallic, materials with high consumer properties (strength, ductility, density);
- development of wear-resistant carbon-based composites, including those with a gradient of physical and mechanical properties.

The Institute develops, manufactures, supplies, installs and services equipment for continuous casting of ferrous and non-ferrous metals, electroslag casting of billets, including bimetallic ones, and centrifugal casting of bimetals.

According to consumer orders, the institute will produce:
- cylinder liners for high-performance engines;
- zinc anodes for galvanic coating;
- original prizes, souvenirs, bas-reliefs, figurines, memorial plaques and other sculptural works made of bronze and aluminum;
- molding casting of parts made of chromium wear-resistant cast iron for centrifugal crushing and grinding equipment for use in the construction industry.
- by casting by quenching solidification, castings from alloy AK12 with nanostructured eutectic silicon, castings from alloy AK15, AK18, AK21 with an ultrafine structure, which have unique physical-mechanical, wear-resistant and performance properties.
- by the method of continuous horizontal casting, rectangular, round and complex cross-section blanks made of cast iron and copper-based alloys, hollow castings made of cast iron and copper-based alloys, copper anodes for galvanic coating.
- electroslag casting bimetallic workpieces, stainless steel workpieces.

The Institute develops and manufactures foundry equipment:
- electroslag remelting installations;
- continuous horizontal casting installations;
- channel furnaces for melting brass and bronze;
- continuous casting lines for copper chloride tape;
- molds with a jet cooling system for continuous casting of metals and alloys.

The Institute offers services in:
1. Study of the structure and properties of metals and alloys:
- determination of the chemical composition of metals and alloys, compressed powders, wires using atomic emission spectroscopy;
- metallographic studies of the structure;
- determination of physical and mechanical properties.
2. Modeling of casting processes:
- solving thermal problems of solidification of castings and ingots of any configuration and problems of crystallization of metals and alloys;
- optimization of casting processes and other technological processes based on multi-criteria optimization techniques.

Consumers interested in purchasing technology for the production of anti-friction silumin as a replacement for anti-friction bronze under a commercial agreement with technical assistance, manufacturing blanks and parts according to customer dimensions under a manufacturing agreement.

Partners interested in joint activities in the field of improving the production technology of anti-friction silumin as a replacement for anti-friction bronze under a technical cooperation agreement.