Daimler-benz Ag

Dieter Hedrich

Eggert Tank

Hans Heinrich

Peter Straub

A process is described for producing fiber-reinforced light-metal castings in which a loose fiber tangle is placed in a casting mold and is saturated with molten light-metal under low pressure. Subsequently, the excess of molten light-metal is squeezed off while the fiber tangle is compressed. The outflow of the molten light-metal is then stopped with the molten light-metal being solidified under high pressure. The process is especially suitable for utilizing the solution-spun inorganic fiber tangles that up to now had not been especially suitable for the reinforcing of light-metals.

Process for producing fiber-reinforced light-metal castings

The invention relates to a process for the hydrogen-impermeable brazing of austenitic structural steel parts. These are initially loosely joined at soldering points with the addition of definite amounts of solder and soldering agent and subsequently brought to soldering temperature in a furnace under a high vacuum. In order to obtain a satisfactory wetting characteristic, on the one hand, and a good hydrogen resistance, on the other hand, a bicomponent soldering process is provided, with about 1 part by weight of nickel-base solder and about 3 parts by weight of bronze-base solder. The nickel-base solder contains about 1-3% by weight of boron and 2-5% by weight of silicon. The nickel-base solder may amount to at most about 30% by weight of solder. Such soldered joints are used for storage pipes at metal hydride reservoirs.

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Schwabisch Gmund, Germany

Dieter Hedrich