초록 ▼

A method of forming a surface layer of carbide, nitride, carbonitride, or solid-solution on the surface of a material to be treated, which comprises disposing in a fluidized bed furnace a treating agent comprising a powder of a refractory material, and a powder of a metal for forming a carbide, nitr

A method of forming a surface layer of carbide, nitride, carbonitride, or solid-solution on the surface of a material to be treated, which comprises disposing in a fluidized bed furnace a treating agent comprising a powder of a refractory material, and a powder of a metal for forming a carbide, nitride, carbonitride or solid-solution or a powder of an alloy thereof, introducing a fluidizing gas into the fluidized bed furnace to fluidize the treating agent and form a fluidized layer, disposing the material to be treated in the fluidized layer, and introducing a predetermined amount of halide into the fluidized layer, and an apparatus for forming the surface layer on the material to be treated, comprising a furnace body for forming the surface layer in the fluidized layer of the treating agent, a heating furnace for heating the fluidized layer, a halide supply pipe in communication with the outside of the furnace body, and a halide gas jetting pipe disposed within the furnace body, which is connected to the halide supply pipe and has a plurality of apertures opened into the fluidized layer.

대표청구항 ▼

A method of forming a surface layer on a material to be treated, which comprises: disposing in a fluidized bed furnace a treating agent comprising a powder of a refractory material, and a powder of a metal for forming a carbide, nitride, carbonitride or solid-solution or a powder of an alloy thereof

A method of forming a surface layer on a material to be treated, which comprises: disposing in a fluidized bed furnace a treating agent comprising a powder of a refractory material, and a powder of a metal for forming a carbide, nitride, carbonitride or solid-solution or a powder of an alloy thereof, introducing a fluidizing gas into said fluidized bed furnace to fluidize said treating agent and form a fluidized bed, disposing said material to be treated in said fluidized bed, introducing, as activator means, solid halide through halide supply pipe means for conducting activator from outside of the furnace, and gasifying said solid halide by means of halide gasification means disposed within said fluidized bed furnace, said halide gasification means being connected to said halide supply pipe means and having a plurality of apertures which open into said fluidized bed, thereby forming under heating a carbide, nitride, carbonitride, or solid-solution layer of said metal on the surface of said material to be treated.