METHOD OF PRODUCING STEEL CASTINGS FROM THERMITE CHARGE Russian patent published in 2017 - IPC B22D9/00 

FIELD: metallurgy.

SUBSTANCE: model unit of the thermite charge is made by size 5-10% less than required size of the casting and placed in press-mould, which cavity corresponds to the required dimensions and configuration of the casting. A wax-like pattern material powder is metered into the mould which is pressed onto the model block under a pressure of 0.5-2.5 mpa. A shell-type solid mould is obtained by applying layers of refractory slurry to the model block. The shell-type mould is moulded into a refractory filler, calcinated, and the model block is ignited for exothermal reaction with formation of steel melt in the shell-type mould.

EFFECT: increase of dimensional and geometric accuracy of the castings.

3 dwg