Purpose. Production of long-stack bimetallic products for strategic industries of Ukraine with increased physical, mechanical and operational characteristics under conditions of intense abrasive wear and significant dynamic sign loads
Specifications. Specialized equipment for the implementation of the foundry process for the production of bimetallic long-stack products using combined induction-laser and induction-plasma methods of heating the steel substrate. Inductor current 800-1000 A, frequency 60 kHz, distance between inductor and substrate 20-25 mm, laser radiation power 600-800 W, focusing spot diameter 2-3 mm, substrate movement speed 6-8 mm/s, plasma arc 100–300 A, voltage 140–160 V, plasma source moving speed 14–40 mm/s.
Application area. Foundry, metallurgy, mechanical engineering.
Advantages. The combination of traditional methods of foundry technology and electromagnetic action will provide significant technical and economic advantages, the most important of which is an increase in the service life of machine parts by 2.5-5.0 times compared to serial products and a reduction of up to 60-80% in the costs of high-alloy, expensive and scarce materials. materials The main patterns of influence of the current strength in the inductor, the heating time of the steel substrate, the speed of its movement, the power of the laser radiation source or plasma flow on the change in the temperature of the substrate are determined. The dependence of the distribution of the heating front of the moving substrate on the geometric dimensions of the spot on its surface and the power of laser radiation using the induction laser processing method was obtained. The temperature and time of existence of the liquid phase in the contact zone of the layers are determined, taking into account the speed of movement of the melts during the pouring process and changes in the thermal field of the bimetallic stack.
Technical and economic effect. The use of combined induction-laser and induction-plasma methods of heating a moving substrate in the foundry process makes it possible to obtain long-stack bimetallic products with a high level of special properties and a service life increased by 3-6 times.
Description. The main essence of the technology is to pour iron-carbon or non-ferrous melts onto a solid steel movable substrate, preheated to a temperature that ensures the formation of a high-quality bond between the layers. The created foundry technology for continuously producing high-quality bimetallic staff makes it possible to ensure the required heating rate and distribution of the thermal field in the moving substrate before pouring liquid metal through the use of sequential or hybrid action of energy sources of varying concentrations and electromagnetic fields.