Abstract: Alkyl-substituted hydroxylamines are useful as aids in the phosphating of metal substrates. In particular, the rate of phosphating and the rate at which manganese compounds are dissolved into aqueous phosphoric acid solutions may be accelerated by alkyl-substituted hydroxylamines.

Abstract: A power generation system including a RF power generator which provides a RF output power. The power distribution system includes a phase-magnitude detector module having a dual logarithmic amplifier phase-magnitude detector. The dual logarithmic amplifier phase-magnitude detector receives current and voltage signals. The dual logarithmic amplifier phase-magnitude detector generates a phase signal that varies in accordance with the phase between the voltage signal and the current signal and a magnitude signal that varies in accordance with the magnitude between the voltage and current signals. A controller receives the phase and magnitude signal and communicates control signals to the matching network.

Abstract: A disc component for a gas turbine engine is produced from a workpiece by a sequence of machining operations. During the machining operations, the workpiece is supported by a fixture engaging support surfaces. The workpiece remains secured to the fixture throughout the sequence of machining operations so that these operations can be conducted on both faces of a disc portion of the workpiece without removing the workpiece from the fixture. The machining operations are conducted alternately on the opposite faces in order to allow residual stresses in the workpiece to dissipate in a controlled manner.

Abstract: The invention is directed to a combination of a conditioner bath and a calcium modified zinc phosphating solution optionally containing hydroxylamine which provide an improved phosphate coating on the surface of ferrous metal articles. In a preferred embodiment, the treatment process further comprises coating the workpiece with a second lubricant. The three treatments work together to provide finer grained phosphate coatings, longer life of the second lubricant bath and improved adherence of the second lubricant, as compared to a similar phosphating bath that is used alone or with a similar second lubricant.

Abstract: A disc component 2 for a gas turbine engine is produced from a workpiece 4 by a sequence of machining operations. During the machining operations, the workpiece 4 is supported by a fixture 36 engaging support surfaces 32, 34. The workpiece 4 remains secured to the fixture 36 throughout the sequence of machining operations so that these operations can be conducted on both faces 26, 28 of a disc portion 8 of the workpiece 4 without removing the workpiece 4 from the fixture 36. The machining operations are conducted alternately on the opposite faces 26, 28 in order to allow residual stresses in the workpiece 4 to dissipate in a controlled manner.

Abstract: Alkyl-substituted hydroxylamines are useful as aids in the phosphating of metal substrates. In particular, the rate of phosphating and the rate at which manganese compounds are dissolved into aqueous phosphoric acid solutions may be accelerated by alkyl-substituted hydroxylamines.

Abstract: A method of high speed milling, and apparatus for performing the method, comprises directing a jet of hgih pressure coolant at the cutting zone of a rotary cutting tool. The jet of coolant has a delivery pressure of up to 500 bar at a flow rate of up to 60 liters per minute. The method is especially effective when used with a rotary cutting tool having at least 20 cutting edges and up to 100 cutting edges.

Abstract: A rotary cutting tool formed with at least twenty helical cutting teeth.