Abstract:
In order to free a seized valve, an inspection port (52) is formed in a wall of the valve body and the areas where the valve is seized are determined. One or more injection ports (54) are formed in the valve body adjacent to the seized portions of the valve, pressurised fluid (preferably an insoluble lubricant having a very high cone penetration) is injected through the or each injection port and the injection ports are then closed.
Abstract:
An improved casting lubricant for direct chill casting of easily oxidizable metals comprises a lubricating oil and a metal fluoroborate salt which decomposes to form boron trifluoride gas when heated to a temperature at or above a melting point of the easily oxidizable metal. The casting lubricant is preferably used in the hot top method of direct chill casting in which ingots of an easily oxidizable metal are cast in an open-ended mold cavity. In this process, a controlled flow of the casting lubricant is pumped into the mold cavity to contact the metal being cast. The metal fluoroborate salt dispersed in the lubricant decomposes to produce boron trifluoride gas at the metal/mold interface, thereby forming a protective, oxidation-preventing shell on the outer surface of the metal. Preferably, the metal fluoroborate salt is an alkali or alkaline earth metal fluoroborate salt which is a solid at ambient temperatures. Most preferably, the lubricant comprises a 1.0 wt.% dispersion of potassium fluoroborate in castor oil, and is used in the direct chill casting of magnesium, magnesium alloys and aluminum alloys containing magnesium.
Abstract:
A lubricating grease composed of a base oil combination comprising 10 to 35 % of one or more poly alpha -olefins, 3 to 15 % of one or more synthetic organic esters, 20 to 30 % of one or more naphthenic oils, the remainder of the combination being one or more paraffinic oils, the percentages being by weight of the total base oil combination and the ratio of the weight of the ester(s) in the combination to the weight of the poly alpha -olefin(s) therein being not greater than 1:3; between 2 and 15 % by weight of the total grease of a lithium soap thickener; between 1 and 5 % by weight of the total grease of a molybdenum dithiophosphate; between 1 and 5 % by weight of the total grease of a zinc dialkyldithiophosphate; between 1 and 5 % by weight of the total grease of a sulphur-free friction modifier; and some or all of the normal grease additives such as anti-oxidants, corrosion inhibitors, extreme pressure additives and tackiness agents.
Abstract:
This invention relates to mineral oil based gear oils and transmission fluids which comprise a major amount of a mineral oil having an iodine number of less than 9 and where at least 55 % of the saturates are aliphatic, and gear oil or transmission fluid additives. In one embodiment, the invention relates to a gear oil or transmission fluid composition comprising a major amount of lubricant basestock and at least one functional additive wherein a major amount of the lubricant basestock comprises a mineral oil having an iodine number of less than 9 and comprising at least 45 % by weight of aliphatic saturates. These gear oils and transmission fluids have good viscosity and oxidation properties.
Abstract:
A lubricant composition having a base oil of lubricating viscosity, a dispersed hydrated alkali metal borate, and a polyalkylene succinic anhydride or non-nitrogen derivative thereof.
Abstract:
The invention relates to a lubricant which contains solid particles that are dispersed in an organic matrix and have a mean particle size of between 1 and 500 nm. The lubricant preferably contains between 0.05 and 30 % by weight, in relation to the total formulation, of solid particles. The organic matrix is preferably selected from among native or mineral oils or fats, carboxylic acid salts with between 12 and 44 carbon atoms, waxes and organic polymers. The solid particles are preferably selected from the metal oxides, metal hydroxides, metal nitrides, metal carbides, metal phosphides, metal borides and metal sulfides and preferably have a hydrophobic coating. The above lubricants can be used to lubricate parts moving in relation to each other, as forming aid, cutting fluid and rolling oil emulsion.
Abstract:
This invention relates to novel water soluble metal working fluid compositions, their use to work metal, a process for working metal using such compositions and the metal worked article of manufacture. More particularly, this invention relates to fluid compositions useful in cutting, grinding, shaping and other metal working operations which require a lubricant. The terms "first Group A" and "second Group B" are used herein to denote different groups and not to indicate any sequence of use or selection as any possible combination or sequence of use of a component(s) is envisioned without limit of any kind. The disclosed fluid compositions are also anticorrosive and environmentally more acceptable than current oil based fluids. There has now been discovered an essentially odorless, substantially non-oil misting, water-soluble metal working fluid comprising at least one component selected from a first Group A herein and optionally one or more components selected from a second Group B herein preferably with the balance of the composition being water and other (optional) minor ingredients. When a component is employed from Group A and a component is employed from Group B the action of the combination generally enhances performance of the resulting combination with contain moieties from both Group A and Group B.
Abstract:
Aqueous liquid treatment compositions comprising as active ingredients boric acid and condensed phosphate ions can form iron phosphate containing conversion coatings on ferriferous substrates at rates of at least 0.3 g/m /min. The coatings are useful as cold working lubricants, either as such or after overcoating with a supplemental lubricant.
Abstract translation:包含作为活性成分硼酸和缩合磷酸盐离子的水性液体处理组合物可以以至少0.3g / m 2 / min的速率在铁质底物上形成含磷酸铁的转化涂层。 涂层可用作冷加工润滑剂,无论是这样还是在用补充润滑剂进行涂覆之后。
Abstract:
The invention relates to a lubricant which can be used as a mandrel lubricant with a content of 75 to 90 wt. % of graphite and contains 1 to 10 wt. % of a phosphate. Said lubricant can also contain 1 to 4 wt % alkali silicate, 1 to 10 wt. % bentonite, 0.5 to 1 wt. % silico-phosphate and common solid lubricants. Said lubricant is preferably used as an aqueous suspension with a solid content of 20 to 40 wt. %.
Abstract:
A lubricant composition including ethoxylated long chain primary alcohols and, preferably, boron compounds but excluding most other previously used organic lubricant materials, gives superior results in tube pointing operations, especially with thick-walled tubes, and is also useful for drawing operations, either subsequent to pointing or independently of pointing, where very high quality surface finishes are desired.