Lost wax casting of a piece made of metal ferrous alloy, comprises producing a fuse model from a first part of the piece and a second part corresponding to a supply channel of the first part, and positioning the fuse model in tank of sand

摘要

The process for lost wax casting of a piece made of metal ferrous alloy comprising an oxidizable element, comprises producing a fuse model (80) from a first part (20) of the piece and a second part (30) corresponding to a supply channel of the first part, positioning the fuse model in a tank of sand, flowing an inert gas in the tank, and casting the ferrous metal in a place of the fuse model. The model comprises inserts (60) made of ozidizable element and covered with a protective coating against oxidation. The oxidizable element is deoxidized prior to recovery by the protective coating. The process for lost wax casting of a piece made of metal ferrous alloy comprising an oxidizable element, comprises producing a fuse model (80) from a first part (20) of the piece and a second part (30) corresponding to a supply channel of the first part, positioning the fuse model in a tank of sand, flowing an inert gas in the tank, and casting the ferrous metal in a place of the fuse model. The model comprises inserts (60) made of ozidizable element and covered with a protective coating against oxidation. The oxidizable element is deoxidized prior to recovery by the protective coating. Some of the inserts in the oxidizable element is introduced into the second part and the first part of the fuse model. The fuse model further comprises a filter (40) and/or a settling chamber (34) between a place of introduction of the inserts in the second part and the first part of the fuse model. An independent claim is included for a piece obtained by lost wax casting.