Industrial implementation of ADI technologies for elements of railways rolling stock production

Case history. Implementation of inmold- and elmag-processes in production has allowed an efficient use of modifications, which reliably ensure formation of spheroidal graphite in the structure of cast iron. The following powerful technological means of mechanical and operational properties improving of casting products from nodular graphite cast iron is a heat treatment in a solid state with the receipt of the metal matrix with the structure of lower or upper bainite. Objects of study: cast irons with different form of graphite component as per GOST 1412-85, DSTU 3925-99, GOST 7293-85; properties investigation of materials was carried out in comparison with the requirements of European and American regional standards DIN EN 1564:1997, ASTM:A897M-90. Results and discussion. The first significant steps in the development of heat treatment of high-strength cast irons have been made by scientists from USSR in the middle of 1950s. A striking contribution to the development of the mentioned scientific and practical provisions has been made by Yu. N. Taran and K. P. Bunin with collaborators. Isothermal hardening technology for spheroidal graphite cast irons in Europe, America, Japan and others regions of the world received an active development since the middle of 80-ies of the 20th century. In the 1990s were entered in actuality international normative documents – ASTM:A897M-90 and DIN EN 1564:1997. Once in a while, given the urgency of the problem and the world level of ADI technology distribution, the work relating to theoretical research and development of practical activities in the field of nodular graphite cast irons isothermal hardening, were recovered at materials science department of NMetAU under Yu.N. Taran’s leadership. With regard to established peculiarities of bainite different types matrix formation created and implemented into industrial production ADI thermal strengthening technological schemes for parts of railway destination. Obtained results allowed t