摘要:
The invention relates to a process for the aluminothermic welding of rails, the aluminothermically produced steel being poured into a refractory mold surrounding the rail ends which are to be joined, and alloying additives being contacted with that part of the steel which runs out of the reaction crucible and forms the weld in the rail head region, wherein the alloying with the alloying additives is carried out after the completion of the aluminothermic reaction and separation of the steel from the slag during tapping and before the steel runs into the casting cavity formed by the mold, and the overflow in the casting mold is closed.
摘要:
Disclosed is a method for the aluminothermal production of molten steel for the aluminothermal welding of workpieces, wherein the aluminothermal reaction is carried out in a crucible made of porous or hollow spherical .alpha.-Al.sub.2 O.sub.3 with a density of 0.8-3.0 g/cm.sup.3 and a bulk density of 0.3-1.8 g/cm.sup.3.
摘要翻译:本发明公开了一种铝热电偶生产用于工件的铝热电焊的方法,其中铝热反应在密度为0.8-3.0g / cm3的多孔或中空球形α-Al 2 O 3制成的坩埚中进行, 密度为0.3-1.8 g / cm3。
摘要:
This invention relates to a switch point comprising a rigid frog point, rigid wing rails, filler means in the interstice between the frog point and wing rails, said filler means being mounted in vertically extending guide means, and wedge means for raising and lowering said filler means.
摘要:
A process for producing rails with a lateral guide surface, together with or without an inner or running edge, and/or a bearing or running surface which is highly resistant to wear and tear, which comprises A. PREPARING THE LATERAL GUIDE SURFACE, WITH OR WITHOUT AN INNER OR RUNNING EDGE, AND/OR BEARING SURFACE BY THE FORMATION OF A SUBSTANTIALLY RECTANGULAR RECESS THEREIN, WHEREBY A1. IN THE CASE OF THE PREPARATION OF THE LATERAL GUIDE SURFACE TOGETHER WITH AN INNER OR RUNNING EDGE, THE RECTANGULAR RECESS HAS A HEIGHT OF AT LEAST 10 MM AND MAXIMALLY 34 MM, AND A WIDTH OF AT LEAST 3 MM AND MAXIMALLY 10 MM, AND A2. IN THE CASE OF THE PREPARATION OF THE RUNNING OR BEARING SURFACE, AT LEAST ONE RECESS POSITIONED ESSENTIALLY PARALLEL TO THE LONGITUDINAL RAIL AXIS HAS A HEIGHT OF AT LEAST 3 MM AND MAXIMALLY 8 MM, AND A WIDTH OF AT LEAST 10 MM AND MAXIMALLY 30 MM, B. FILLING THE RECESSES BY WELDING ON A WELDING MATERIAL HAVING THE FOLLOWING COMPOSITION (IN PERCENT):
摘要:
This invention relates to a deflecting device for switches which can be negotiated at high speeds free from vibrations and shocks in the branch rail comprising tongue means, wedge means for closing the gaps between said tongue means and connecting rails, and means for moving said wedge means into and out of the closed position.
摘要:
The invention relates to an aluminothermic mixture consisting of a finely particulate base portion of iron oxides and aluminum as well as metallic additives, wherein a master alloy, namely a ferrochromium alloy consisting of (in % by weight)C: 0.1 to 20Si: 2 to 40Cr: 5 to 80and iron with impurities resulting from manufacture and, if appropriate, other alloying elements, is added in a quantity of from 5 to 50% by weight, relative to the base portion, as metallic additive.