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US 8,894,770 B2Granted
Process and apparatus to treat metal surfaces
AssigneeAndritz Iggesund Tools Inc.
InventorJennings Drake Carlisle
Life of this patent
Estimating the term…
Abstract
A method for treating metal parts is provided that includes positioning a metal part within a reactor chamber, and positioning a boron containing solid form having a porosity of at least 10% by volume in the reactor chamber adjacent to the metal part. A halide containing gas may be introduced to the reactor chamber that the boron containing solid form is present in. The at least one halide containing gas and the boron containing form react to provide a gas that borides the metal part.
Claims19
A boriding treatment apparatus comprising:
- a reactor chamber comprising a boron containing heating element, wherein the boron containing heating element is a component of an assembly for housing a metal work piece for treatment by the boriding treatment apparatus, the boron containing heating element being a solid form having a porosity, wherein the boron containing heating element converts electricity into heat by joule heating;
- and
- at least one treatment gas producing chamber in communication with the reactor chamber with a passageway for transporting a reaction gas produced within the at least one treatment gas producing chamber through the boron containing heating element, wherein the reaction gas and the boron containing heating element react to provide a boronizing gas that borides the metal work piece being housed by the assembly.
Dependencies are inferred from the claim text.