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Vacuum assisted application of thin coatings on apertured substrates

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Process for manufacture of liquid-impervious multilayer composite material comprising 3-dimensional apertured substrate with thin liquid-impervious thermoplastic coating.

Vacuum blasting

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Instead of compressed air, vacuum is used to extract air bubbles or media inclusions from coated surfaces and so is a means of remedying defects. Appears to be mainly useful for small, localised areas of paintwork.

Vacuum blasting and other new surface preparation equipment

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Vacuum blasting and associated equipment are described. Air powered units use air jet-venturi induction to provide vacuum conveyance of abrasive.

Vacuum blasting: the new age of surface preparation

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Method is applicable in confined areas, where dust or abrasives present hazard, and there is need for containment of substrate. Types of equipment and examples of use of the technique are also described.

Vacuum Carbo-Nitriding Method.

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Title carbonitriding where carbonitriding gas is replaced, after a time, by nitriding gas at lower temperature, to give adequate case depth, hardness etc even for low grade steel in a short time.

Vacuum Carbo-Nitriding Method.

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Title carbonitriding where carbonitriding gas is replaced, after a time, by nitriding gas at lower temperature, to give adequate case depth, hardness etc even for low grade steel in a short time.

Vacuum Carbo-Nitriding Method.

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Title carbonitriding where carbonitriding gas is replaced, after a time, by nitriding gas at lower temperature, to give adequate case depth, hardness etc even for low grade steel in a short time.

Vacuum Carbo-Nitriding Method.

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Multi-stage process incl. preheat, carburization, diffusion, nitriding.

Vacuum carburization processing method and vacuum carburization processing apparatus.

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Process is carried out at v. low pressure

Vacuum carburization processing method and vacuum carburization processing apparatus.

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Gas is supplied at very low pressure, with specified temperature-time sequence & quenching.

Vacuum carburizing

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Vacuum carburizing method comprises vacuum heating steel workpieces in vacuum furnace; and supplying acetylenic gas, at ¢1kPa.

Vacuum carburizing

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Steel is carburized at gas pressure <20mbar using propane at c. 250°C with addition of 1:1-1:2 propane:hydrogen.

Vacuum carburizing

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Vacuum carburizing method for steel comprises heating to 900-1100°C, introducing ethylene gas at 1-10 kP in carburizing furnace chamber.

Vacuum carburizing apparatus and carburizing method.

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Process control & gas analysis using optical (infra-red ?) source and sensor with logic.

Vacuum Carburizing Method and Device.

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Sub-atmospheric method where process control is via opacity measurement on inlet or exhaust gases.