FIELD: metallurgy.
SUBSTANCE: metal melt with content of Ni≥1.0% is produced in furnace and overheated by its DC electric arc up to 1480-1580 °C, slag is tapped and aluminium is introduced onto the metal melt mirror in amount 0.5÷3.5 wt % of liquid metal in furnace for electrolytic deoxidation of melt, heat is kept for 1-7 min, melt crystallization is carried out by intensive cooling at 60-100 °C/min rate to temperature, which is within 100 °C range below and above the resistance temperature of pearlite, then the casting is removed from the mould and cooled to room temperature at 30-60 °C/h rate and the working surface of the casting is machined and then subjected to heat treatment by high-frequency currents.
EFFECT: invention makes it possible to produce cast iron with high crack resistance and operational characteristics.
1 tbl
| Title | Year | Author | Number |
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