Магнитно-абразивная обработка оболочек твэлов из сплава Zr-Ni с керамическим покрытием CrAl

Abstract

High surface quality of the shells of fuel rods can be achieved in the process of their manufacture by applying the finishing operation of magnetic abrasive machining (MAM). As a result of MAM, a nanorelief of the surface and a near-surface layer are formed with a minimum of structural defects. The essence of the MAM process is that the ferroabrasive powder, under the influence of a magnetic field, takes the form of an "elastic brush" and polishes the surface of the product. The operation of MAM tubular claddings made of Zr-Ni with CrAl coating was produced by ferroabrasive powders, based on iron with the addition of titanium carbide, boron carbide and with aluminium oxide. With the use of special process fluids. The “soft” modes of MAM, the influence of the magnetic field and the optimal compositions of powders and liquids make it possible to provide a complex of properties of shell tubes that meet the high requirements for the operation of atomic reactors.