Abstract: The invention concerns a wear-resistant camshaft and a method of producing the same. Objects in which the application of the invention is possible and useful are all cast-iron parts which are subject to wear as a result of lubricated friction. The wear-resistant camshaft consists of cast-iron and it has a surface layer consisting of a ledeburitic remelted layer with a high cementite portion, and, lying thereunder, a martensitic hardening zone, whereby according to the invention. a. the remelted layer consists of finely dispersed ledeburitic cementite with thicknesses of ≦1 &mgr;m and a metallic matrix of a phase mixture of martensite and/or bainite, residual austenite, as well as less than 20% finely laminated pearlite with a distance of ≦0.1 &mgr;m between the lamelias, and b. the hardening layer is formed from a phase mixture of martensite and/or bainite, partially dissolved pearlite, and residual austenite.

Abstract: The invention concerns a method for beam welding of hardenable steels using a short-time heat treatment. A preferred area of application of the invention is motor vehicle and mechanical engineering. In the method according to the invention, the short-time heat treatment occurs first as the sole preheating in a defined manner, and then the beam welding begins after a defined cooling time, at the latest.

Abstract: In a process, the humidity of at least the exhaust air is measured and used for the regulation of the product humidity of water activity during a treatment process. Therefore, it is possible to directly register the humidity taken on by the inlet air or charged onto it, and to draw a conclusion about the humidity content of the product. To register the humidity value, a measuring device with moisture testers in the inlet air channel and in the exhaust air channel is provided. Especially the moisture tester for the exhaust air is constructed as a bypass flow moisture tester in an intrinsically safe manner, so that it can be used even under ex-conditions. During drying procedures, the possible measuring of the humidity charge of the exhaust air from the drying process, the course can be exactly controlled. The moisture testers can be constructed as dew point testers, especially with capacitive measuring probes.

Abstract: A device for use in fluidized bed techniques, particularly for coating tablets or the like, which comprises a container for use as a processing zone for the material to be processed, a sensor device or the like for monitoring the upper end area of the processing zone, and apparatus for moving the material through the processing zone.