摘要:
It is an object of the invention to provide a slide member which is excellent in the initial running-in property and can provide an excellent sliding property even under a strict sliding condition and, in particular, a slide member with a solid lubrication coating film which is excellent not only in the friction property but also in the wear resistance under the fluid lubrication, boundary lubrication and dry lubrication conditions. The invention provides a slide member which includes a solid lubrication coating film on a flat-plate-shaped base member, characterized in that, in the surface of the slide member, there are formed a plurality of concentrical grooves extending in the peripheral direction of the slide member surface, and, between the mutually adjoining ones of the grooves, there are formed ridge portions respectively.
摘要:
The present invention aims to provide a highly heat-resistant sliding member for thrust bearing which can be manufactured at a low cost through formation of an intermediate layer by a conversion treating method for cost reduction, includes a chemical conversion coating formed on an iron-base member and a resin film containing a thermosetting resin and a solid lubricant which is formed on the chemical conversion coating, and can resist to high temperatures of 200°C or higher. And the invention is concerned with the sliding member for thrust bearing, characterized by including an iron-base member performed shot blast treatment on which the chemical conversion coating of zinc calcium phosphate is formed and a resin film containing a thermosetting resin requiring baking at temperatures of 200°C or higher and the solid lubricant is further formed.
摘要:
To obtain a treatment solution for insulation coating for grain oriented electrical steel sheet capable of providing a grain oriented electrical steel sheet having excellent insulation coating properties, i.e., tension induced by a coating, moisture-absorption resistance, rust resistance, and lamination factor, while preventing the reduction in the tension induced by a coating and the moisture-absorption resistance which causes problems when the treatment solution for insulation coating is rendered chromium-free by preparing the treatment solution using one or two or more members selected from phosphates of Mg, Ca, Ba, Sr, Zn, Al, and Mn, and, based on PO 4 in the selected one or two or more phosphates, colloidal silica in a proportion of 0.5 to 10 mol in terms of SiO 2 and one or two or more members selected from permanganates of Mg, Sr, Zn, Ba, and Ca in a proportion of 0.02 to 2.5 mol in terms of metal elements in the permanganates, relative to PO 4 :1 mol.
摘要:
The invention relates to a method for preparing metallic workpieces for cold forming by contacting the metallic surfaces thereof with an aqueous acid phosphating solution so as to embody at least one phosphate coating and then coating the phosphate-coated surfaces with at least one lubricant in order to embody at least one lubricant layer. According to the inventive method, the phosphating solution essentially contains only calcium, magnesium, or/and manganese as cations that are selected among cations of main group 2 and subgroups 1, 2, and 5 to 8 of the periodic table of chemical elements in addition to phosphate. Furthermore, an alkaline earth metal-containing phosphating solution is free from fluoride and complex fluoride while the phosphating process is carried out electrolytically. The invention further relates to a metallic workpiece that is coated accordingly as well as the use of workpieces coated in said manner.
摘要:
The invention is to provide a surface-treated steel sheet of good white rust resistance with no chromium in its surface treatment film, and it has realized a surface-treated steel sheet of higher-level corrosion resistance by forming a reaction layer of plating metal with a barrier layer effective for anticorrosion not in a two-layered film but in a single-layered film. The surface-treated steel sheet is fabricated by applying a surface-treating composition that contains:
(a) a water-dispersible resin and/or a water-soluble resin obtained through reaction of an epoxy group-containing resin (A) with an active hydrogen-containing compound (B) a part or all of which is an active hydrogen-containing hydrazine derivative and preferably with a hydrophilic organic component (C), (b) a silane coupling agent, (c) a phosphoric acid and/or a hexafluoro-metal acid, and (d) preferably an aqueous dispersion of an urethane resin, to a zinc-plated or aluminium-plated steel sheet followed by drying it to form thereon a surface treatment film having a thickness of from 0.02 to 5 µm. Regarding its film structure, the surface treatment film comprises an amorphous compound layer containing P, Zn and/or Al, and O, and an overlying organic resin matrix layer where the matrix is a hydrazine derivative-modified epoxy group-containing resin or the epoxy group-containing resin and an urethane resin.
摘要:
The present invention comprises providing a phosphate coating of at least 50 % Zn2Fe(PO4)2•4H2O on metal having a nonferrous surface by contacting the metal with a phosphate treatment bath that contains zinc ion, phosphate ion, and hydroxylammonium ion and at least 17 weight parts ferrous ion for each 100 weight parts zinc ion. This method can be run on the metal after the metal has been brought into contact with a surface conditioning bath containing divalent or trivalent metal phosphate particles no larger than 5 mu m. The hydroxylammonium ion concentration is preferably 0.2 to 5 g/L, the phosphate ion concentration is preferably 5.0 to 30 g/L, the zinc ion concentration is preferably 0.5 to 5.0 g/L, and the ferrous ion concentration is preferably 0.2 to 5.0 g/L.
摘要:
The present invention comprises providing a phosphate coating of at least 50 % Zn2Fe(PO4)2•4H2O on metal having a nonferrous surface by contacting the metal with a phosphate treatment bath that contains zinc ion, phosphate ion, and hydroxylammonium ion and at least 17 weight parts ferrous ion for each 100 weight parts zinc ion. This method can be run on the metal after the metal has been brought into contact with a surface conditioning bath containing divalent or trivalent metal phosphate particles no larger than 5 νm. The hydroxylammonium ion concentration is preferably 0.2 to 5 g/L, the phosphate ion concentration is preferably 5.0 to 30 g/L, the zinc ion concentration is preferably 0.5 to 5.0 g/L, and the ferrous ion concentration is preferably 0.2 to 5.0 g/L.
摘要:
This application provides a metal-surface-treating composition comprising metal ions of Al, Mg, and Mn, a water-soluble organic resin, an acid, and water; and a surface-treated metal material which is treated by using the composition. The composition is chromium free and the resulting surface-treated metal material does not inflict water pollution by chromium. Moreover, the surface-treated metal material exhibits both superior conductivity and corrosion resistance and can be applied to wide variety of uses, replacing conventional chromate-treated steel sheets.
摘要:
The invention concerns a process for producing phosphate coatings on the surfaces of metals, in particular iron, steel, zinc, zinc/nickel alloys, aluminium and/or its alloys or aluminium-steel composites, by spraying, spray dipping and/or dipping, with an aqueous solution containing: 0.01 to 5 g/l of zinc(II) ions, 0.3 to 10 g/l of barium(II) ions, 3 to 50 g/l of phosphate ions, 0 to 2 g/l of fluoride ions, and as accelerator: 0.5 to 30 g/l of nitrate ions and/or 0.01 to 1 g/l of nitrite ions and/or 0.2 to 10 g/l of chlorate ions and/or 0.1 to 2 g/l of an organic nitro compound and/or 0.01 to 5 g/l of a peroxide compound, the pH value of the solution being adjusted to between 2 and 4.