Method of manufacturing a part comprising two different superalloys

A method of manufacturing a superalloy part, the part comprising a first portion comprising a majority by weight of a first superalloy and a second portion comprising a majority by weight of a second superalloy different from the first superalloy, the second portion extending from the first portion, the method comprising depositing the second portion on a surface of the first portion by a direct metal deposition method, deposition of the second portion comprising at least depositing a first layer on said surface, then depositing a second layer on the first layer, the first layer comprising the first and second superalloys, the first layer presenting a content by weight of the first superalloy that is strictly greater than that content by weight of the second layer and strictly less than that content by weight of the first portion, the second layer presenting a content by weight of the second superalloy that is strictly greater than that content by weight of the first layer;

• wherein the first portion of the part constitutes at least a portion of a gas turbine casing and the second portion of the part constituting an attachment portion for attaching a ring sector or a sealing portion, the second portion extending radially towards the inside of said casing.