Abstract:
There is provided an improved process for isothermal shaping of a titanium-containing workpiece in a hot die. A precoat lubricant composition including a glassy component and a solid lubricant such as graphite dispersed in an organic medium is applied to the workpiece, and the workpiece heated to a temperature sufficient to remove the organic medium to leave a residue of glassy material and graphite on the workpiece. The workpiece is then inserted in a heated split die, and the die loaded to alter the shape of the workpiece. The ratio of the solid lubricant to the glassy component is at least one to one. The particle size of the glassy component is important to the surface character of the finally shaped workpiece.
Abstract:
A solid, self lubricating bearing material especially useful as a sliding electrical contact in vacuum environments comprising a high temperature lubricant chosen from AlPO.sub.4, BaF.sub.2, CaF.sub.2 and mixtures thereof, a lower temperature solid lubricant chosen from the chalcogenides which exhibit lubricity, & a silver matrix, the ratio of high temperature lubricant to silver being about 1:4 to 1:10, the ratio of lower temperature lubricant to silver being about 1:2 to 1:8. Filler materials up to 20% by weight chosen from aluminum oxide, silicon nitride, molybdenum silicide, metals from Group 8 of the Periodic Table, and mixtures thereof may be added to alter the hardness of the material.
Abstract:
A process for preparing improved solid lubricants, by modifying the surface characteristics of the solid lubricants using reactive chemical compounds, is disclosed.Prior art measures anticipate combinations of modifiers and solid lubricants as lubricating mixtures but do not disclose bonding modifiers with solid lubricants.Examples of the improved modified solid lubricants are molybdenum disulfide chemically bonded to polystyrene, polymethylmethacrylate or polydimethylsiloxane.
Abstract:
A lubricant for non-chip metal forming comprising (1) 5% by weight or more of at least one powdered sulfate selected from the group consisting of calcium sulfate and barium sulfate having a mean particle size of 100 .mu. or less and (2) at least one conventional lubricant selected from the group consisting of inorganic solid lubricants, organic solid lubricants and organic liquid lubricants. This lubricant is excellent in galling resistance (anti-weld property) as well as in other properties required for a lubricant for non-chip metal forming. In the non-chip metal forming using this lubricant, it is sufficient to subject the raw material to a simple pretreatment such as pickling or shot blasting to accomplish the desired non-chip metal forming.
Abstract:
Compositions suitable for use as forging lubricants, especially for hot forging, comprises an aliphatic or alicyclic organic diluent (preferably one which has a high flash point and a relatively high boiling point), graphite and non-Newtonian basic alkaline earth metal complex. The complex is preferably a grease-like or gel-like basic calcium or magnesium sulfonate or carboxylate, or mixture thereof. Basic magnesium sulfonate-carboxylates are especially preferred. These lubricants, when used in hot forging operations, are characterized by their ability to protect the forging die from welding, scoring or other deformation and by their relatively smokeless properties.
Abstract:
A forging compound particularly adapted for hot die dwell forging of titanium and its alloys comprises boundary layer particles (boron nitride or graphite) and a major quantity (more than 60% by weight) of vitreous components. The vitreous components comprise diboron trioxide and silica frit containing a metal oxide wetting agent. In a preferred form, the forging lubricant comprises about 14 to 25% by weight boron nitride particles, balance, vitreous components. The latter comprise about 60% to 75% by weight diboron trioxide, balance silica glass containing cobalt oxide wetting agent in an amount of 1.0 to 3% by weight of the vitreous components. All the foregoing ingredients may be dispersed in a coatable carrier preferably comprising a solvent, e.g., xylene, in which a resin binder is dissolved. A method of using the lubricant includes coating workpieces with the lubricant, heating the workpieces to forging temperature, and imposing forging pressure on the workpiece within an enclosed die for a dwell period to creep-flow the workpiece metal into conformity with the forging die.
Abstract:
An improved lubricating oil composition comprising a major amount by weight of oil of lubricating viscosity; a minor amount by weight of solid particles effective to improve the lubricating properties of the composition; and a minor amount by weight of at least one of certain specific polymers has been found to provide improved inhibition of sludge and varnish formation in use. The polymers useful in the present composition comprise(1) an olefin polymer, for example, an ethylene, propylene and 1,4-hexadiene terepolymer, with an dialkylaminoalkyl methacrylate grafted thereon;(2) an interpolymer prepared from a long chain n alkyl-methacrylate and a dialkylaminoalkylmethacrylate or a N (alkanone) acrylamide; or(3) mixtures thereof.
Abstract:
A new coating composition, coated article and method are disclosed herein dealing with the preparation of coated surfaces which are useful, for example, in glass molding wherein a relatively lubricious, abrasion resistant surface is desired under conditions of high operating temperatures. The coating composition in its most basic aspect involves a dispersion of an aluminum phosphate and a very fine particle size pigment material together with other materials including novel dispersion stabilizing ingredients and a special water dispersible resinous film-modifying agent.
Abstract:
An emulsion of water; a water immiscible liquid including a solution of a liquid nonpolar hydrocarbon and a liquid halogenated aliphatic hydrocarbon; and a colloidal suspension of magnetic particles and a surface active agent.