METHOD FOR RESTORING THE WORK SURFACE OF CRYSTALLISER WALLS Russian patent published in 2017 - IPC B22D11/59 B22D19/10 B23P6/00 B82Y30/00 

FIELD: metallurgy.

SUBSTANCE: method includes cleaning the working surface of the crystalliser walls, blasting the worn out areas adjacent to the corners of the mould and located in the lower part of the working surfaces of the walls made of copper or its alloys, and high-speed gas flame spraying on them of a heat-resistant wear-resistant coating in the form of mechanically activated powder cBN-Ni₃Al-Si-C-Co-Y with the following component ratio, wt %: cBN 21-34, Ni₃Al 37-40, Si 9-12, C 3-5, Co 12-15, Y 5-7, starting from a wear depth of at least 250-450 mcm, a thickness not exceeding the value of wear. A high-speed flame spraying said coating is performed in a protective atmosphere of argon at layer NiAl 100-150 microns thickness having a shape memory effect, the catalyst supported on the wall worn.

EFFECT: invention allows to carry out a recovery operation without disassembly of the mould, improve wear resistance and coating adhesion of the coating to the working surface of the mould.

2 cl, 3 ex