PLUG AND PRODUCTION METHOD THEREOF

• Main Authors: HIGASHIDA YASUTO, HIDAKA YASUYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2017
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; PERFORMING OPERATIONS; PUNCHING METAL; ROLLING OF METAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING

PROBLEM TO BE SOLVED: To produce easily a plug having a film with high peel resistance.SOLUTION: A production method of a plug includes steps for: preparing a plug body; forming a body coating film on the surface of the plug body by performing arc spray coating using an iron wire; forming a surface layer film on the body coating film by performing arc spray coating using the iron wire at a shorter spray coating distance than a spray coating distance at a point of time when formation of the body coating film is finished; and applying a hot isotropic-pressure pressure treatment to the plug body on which the body coating film and the surface layer film are formed.SELECTED DRAWING: Figure 1 【課題】耐剥離性が高い皮膜を有するプラグを簡易に製造する。【解決手段】プラグの製造方法は、プラグ本体を準備する工程と、鉄線材を用いたアーク溶射を行ってプラグ本体の表面上に本体皮膜を形成する工程と、本体皮膜の形成が終了した時点における溶射距離よりも短い溶射距離で鉄線材を用いたアーク溶射を行って、本体皮膜上に表層皮膜を形成する工程と、本体皮膜及び表層皮膜が形成されたプラグ本体に熱間等方圧加圧処理を施す工程とを備える。【選択図】図１