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ISSN 2664-2441 (Online)
ISSN 2073-9583 (Print)

Optimization of silicon content in FeSiMg ligatures for spheroidizing treatment of cast iron melts

Metalozn. obrobka met., 2018, Tom 87, No 3, сс. 36-38
doi.org

Bachynskyi Yu. D.

Physico-Technological Institute of Metals and Alloys of NAS of Ukraine, Kyiv

UDC 669.162.275:669.112:542.65
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Summary

The improvement of the structure of thin-walled high-strength cast irons with a wall thickness of 2-3 mm and castings with a difference in wall thickness from 2 to 10-12 mm by modification with the FSMg7 alloy was studied. Processing the FeSiMg melt with a ligature with optimized silicon content provides a high level of graphitization of the structure of thin-walled castings. In the 2.0 mm thick wall, the number of inclusions of spherical graphite reached 1680 pieces/mm2, and in the 3.0 mm and 12.0 mm walls – 1180 and 780 pieces/mm2, respectively.