METHOD OF BORING STEEL PARTS UNDER PRESSURE AND CONTAINER WITH FUSIBLE GATE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC C23C8/70 C23C8/68 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to methods for application of boride coatings on steel parts during chemical-thermal treatment in conditions of induction heating, and can be used in machine building to increase durability of parts of machines operating under conditions of intense abrasive wear, corrosion, impact loads. In the proposed method of boring steel parts under pressure, which includes preparation of process equipment (container), performing induction heating and holding container with part and borating mixture, wherein heating and holding are carried out in a container at pressure of 600–1,200 MPa due to gases released from the heated charge, and pressure is controlled by a fusible gate, structurally in form of a channel filled with a mixture in amount of 20–30 % greater than the volume of the reaction zone of the container, which melts at temperature 800–1,150 °C and connects inner volume of container with air atmosphere, and then during cooling hardens, providing container locking and creation of required excess pressure.

EFFECT: technical result of implementation of proposed method of boring steel parts under pressure consists in improvement of wear resistance and simplification of hardware design without increasing duration of process.

1 cl, 4 dwg, 2 ex