COMBINED CASTING MOULD FOR PRODUCING COLUMN STRUCTURE IN ARTICLES OF MAGNETIC TYPE MATERIALS OF AL-NI-CO-TI-FE TYPE

摘要

FIELD: metallurgy.;SUBSTANCE: invention relates to the production by the method of directional crystallisation of cast permanent magnets from magnetically hard materials of the Al-Ni-Co-Ti-Fe type with a column structure. The combined casting mould consists of a ceramic mould, wrapped with refractory thermal insulation material in the form of 15-20 mm based on ceramic fiber having the following composition, wt %: silica dioxide 52-56, alumina oxide 28-30, zirconia dioxide 14-18. The ceramic mould and the heat-insulating material are fixed outside by nickel wire metal strips.;EFFECT: increase of the main magnetic characteristics of the products due to the improvement of column structure quality.;1 dwg, 1 tbl