摘要:
As an electrode (12) an electrical discharge coating uses a green compact formed by pressing powder of a metal, a metal compound, or a ceramic or a heat-treated green compact. When, in a working liquid (15) or in an atmosphere, discharge is generated between the electrode (12) and a workpiece (11), the surface of the workpiece (11) is coated with a film (14) composed of the electrode material or a substance resultant from the reaction of the electrode material by the energy from the discharge. A method of evaluating an electrode (12) used for the electrical discharge coating is characterized in that the feasibility of film coating (14) using the electrode (12) is evaluated on the basis of the volume of an electrode material deposited on a workpiece (11) by a single pulse discharge.
摘要:
An electrode (202) for discharge surface treatment is disclosed which is used in a discharge surface treatment wherein a compact body formed by compressing a metal powder, a metal compound powder or a ceramic powder is used as an electrode (201) and a discharge is generated between the electrode (201) and a workpiece (202) in a process liquid (205) or in the air for forming a coating film over the surface of the workpiece (202) with the energy of discharge. The coating film is composed of an electrode material or a material with which the electrode material is reacted by the discharge energy. In the electrode (202) for discharge surface treatment, the diameter of a material powder which is not desired to fuse is formed larger than that of another material powder which is desired to fuse.
摘要:
In a rotating member (5) rotatably engaged with a housing (3), a pulse-like electric discharge is produced in a processing liquid or in a gas, between an electrode and the rotating member (5). The electrode is a chemical compound from metallic powder or metal, or a molded body formed by molding ceramic powder, or a molded body obtained by heating the molded body. Energy of the electric discharge causes coating to be formed on an engagement portion (15) engaging the housing (3), the coating formed from the material of the electrode or a substance to which the electrode material reacted by energy of the discharge.
摘要:
To form a thick film through a coating conducted by a submerged pulse-discharge treatment, not less than 40 volume % of a metal material, which never or hardly forms a carbide, is contained in an electrode as an electrode material.
摘要:
A defect generated at a portion to be treated of a machine component is removed, a porous deposition is formed by employing a molded electrode composed of a molded body or such molded from powder of a metal or such and generating a pulsing electric discharge between a removed portion from which the defect in the machine component is removed and the molded electrode so that a material of the molded electrode or such is deposited or so at the removed portion of the machine component by energy of the electric discharge and finish machining to required dimension is carried out so as to make a thickness of the deposition to be a predetermined thickness.
摘要:
A nozzle for processing machinery, wherein a hard ceramics coating is formed on the surface of the base metal of the nozzle for processing the machinery to prolong the service life thereof. Since the hard ceramics coating is formed on the surface of the base metal of the nozzle for the processing machinery, the nozzle for processing the machinery is hard to be scratched on the surface thereof and highly resistant to heat. Thus, service life can be prevented from being shortened due to the occurrence of scratch by the contact thereof with a warped work during processing and the deformation thereof by heat in the nozzle for processing the machinery to realize an increased service life.
摘要:
To form a coating film having an excellent wear-resistant property in a temperature range from low temperature to high temperature a coating-film forming method includes a metal-powder producing step of producing a metal powder containing an element exhibiting a lubricating property when oxidized; an oxidizing step of oxidizing the metal powder so that an amount of oxygen contained in the metal powder is within 6 weight % to 14 weight %; and a coating-film forming step of forming a coating film on a material subject to a treatment, the coating film having such a composition that an area where an oxygen content is 3 weight % or less and an area where an oxygen content is 8 weight % or more are distributed in a unit area of the coating film when the metal powder is in a melted state or a semi-melted state, and an oxygen content of the entire coating film after the metal powder is melted or semi-melted being within 5 weight % to 9 weight %.