Sollac

Irsid

Jean Philippe

Herve Sierpinski

Pierre Jean Krauth

Thierry Juret

A coating layer for sheet metal is provided that is comprised of an aluminum-silicon alloy having low emissivity. The coated sheet metal may be used as heat shield material, particularly for heat sources having temperatures greater than 500&deg; C., which sources may be, e.g., the hotter parts of the conduits of automotive exhaust systems. The sheet metal may be sheet steel coated on at least one of its principal surfaces with a layer of a coating comprised of an alloy of silicon in the amount of 7-11 wt. % and aluminum in the amount of 87-93 wt. %. The coated surface of the sheet has a monochromatic emissivity less than 0.15 for all wavelengths in the range of 1.5-15 microns.

Sheet metal with an aluminum-containing coating having low emissivity

Both a method and apparatus for regulating the position of a camera in a thermographic control and monitoring arrangement is provided for a system for welding together at least two metal plates along a joint plane. The apparatus includes a welding head that generates a high energy-density welding beam, a camera for thermographically monitoring the welding carried out by the welding beam, a movable frame member for supporting the welding head and camera, a fixed light source disposed in a zone that is accessible by the welding beam generated by the welding head, and an adjustment assembly for regulating the position of the camera with respect to the welding head. In the method, the welding beam is moved into a reference position with respect to a point source of light. Next, the frame member is displaced by a specific distance d corresponding to the distance desired between an impact point I of the welding beam and the field of view of the camera on the plate is being welded. Next, the field of view of the camera is adjusted so that the camera registers signals from the light source. Finally, the camera is locked into position with respect to the frame member. By accurately adjusting the position of the camera with respect to the weld created by the welding head, the resulting thermal plot generated by the camera can be accurately interpreted.

Method and apparatus for regulating the position of a camera in a thermal control system for welding

Probe for determining the temperatures of the walls of coke oven flues, including an optical pyrometer suspended by a metallic rope from a manipulating device including a drum on which the rope is coiled and uncoiled. The pyrometer is contained in an insulating sleeve of refractory material, and the rope is surrounded by a sheath which is wetted before the measurement takes place, in order to prevent an unacceptable temperature rise during the brief measurement period required. Due to this arrangement, conventional cooling apparatus is eliminated.

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Veckring, France

Jean Philippe