Heraeus Electro-nite International N.v.

Centre De Recherches Metallurgiques-centrum Voor Research in De

Centre De Recherches Metallurgiques Asbl—centrum Voor De Research In De Metallurgie Vzw

Centre De Recherches Metallurgiques Asbl-centrum Voor Research in De Metallurgie Vzw

Vittorino Tusset

Philippe A Paulus

Jacques Plessers

Marc Schyns

Jules Hancart

Gisele Walmag

Alain Schmitz

Gisèle Walmag

The present invention relates to a process for manufacturing a projectile made of steel or based on iron, for a hunting or sports cartridge, for the purpose of giving it a Vickers hardness at room temperature of between 40 HV 10 and 110 HV 10, preferably between 40 HV 10 and 85 HV 10, characterized at least by the following successive steps:&#x2014;liquid pig iron or steel is used, hereafter called liquid metal, the carbon content of which is between 0.8 and 4.0% C by weight, preferably between 0.8 and 2.0% C by weight;&#x2014;the liquid metal is cast using a steam or water-vapor granulation process to obtain spheroidal steel particles; &#x2014;said particles are subjected to a heat treatment for softening the solidified metal by graphitization, while remaining in the ferritic range; and&#x2014;optionally, said particles are subjected to a surface coating treatment.

Projectile made of steel softened to the core

A method and device are provided for analysis of a molten material using optical emission spectrometry. The molten material may be, for example, a molten metal, such as casting iron or steel, or slag, glass, or lava. A sensitive element is used having at least one emission spectrometer and at least one excitation device to effect the excitation of the molten material and to enable the partial or complete generation of a radiation to be analyzed by a spectrometer present in the sensitive element. The sensitive element is brought into contact with the molten material and transmits information, which contains analysis elements supplied by the spectrometer. An immersion sensor is also provided for carrying at least part of the device for performing the analysis method.

Method for analysis of a molten material, device and immersion sensor

Steel sheet is subjected to a thermal treatment as a result of which an oxide layer is formed. The sheet is pickled by contact with an organic acid solution (formic acid), containing at least 50 mg/l of iron, at a pH of 1.5 to 4 and at a temperature above a minimum value T.sub.m given by T.sub.m =20+(pH-1.5)32.

Continuous treatment of steel sheet

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Oupeye, Belgium

Vittorino Tusset