Research of the influence of the technological parameters of the steelmaking process on the design and defect formation of large-sized castings for freight cars

The research conducted at the “Foundry and Mechanical Plant” JSC is devoted to the analysis of the influence of the temperature regime of pouring 20GL steel into molds on the formation of defects. It was experimentally established that the optimal range of pouring temperatures allows avoiding such defects as hot cracks and underfills. Data were obtained on the time of filling molds, the distribution of defects and the preservation of the metal structure at different temperatures. It was proven that compliance with the temperature range of 1580-1590 °C guarantees high quality castings. Based on the results of the study, technological parameters were proposed that ensure minimal formation of defects and uniform formation of the grain structure.