摘要:
In a method and device for welding rails with a heat treated head, the halves of a casting mold made from a refractory material having at least one lateral vent are mounted around two end pieces of the rail that are to be connected, thereby forming a casting space. The mounting mold is preheated and the casting space is sealed by a sealing element made of refractory material covering the rail head; steel produced by a metallothermal process penetrates into the casting space after passing over the sealing element and fills the space, whereby alloy inserts in solid and compact form arranged above the rail head in the casting space are contacted with part of the steel forming the weld in the head zone.
摘要:
A process of manufacturing an automobile component comprises molding a high strength first element of steel at a temperature about 1550null C.; removing dirt from a surface of the first element of steel and increasing a roughness of surface thereof by sand polishing; placing the first element of steel in a mold; casting a low tensile strength second element of iron on the first element of steel in the mold at a temperature about 1200null C.; cooling the mold; initially polishing a surface of the half-finished component; and diffusing a melted copper into gaps between the first element of steel and the second element of iron at a temperature ranged from about 1080null C. to about 1200null C. to produce the finished component.
摘要:
A metal object forming method includes a preliminary step and a metal-injecting step. At the preliminary step, flowability-improving material is put in a molding die. Then, at the metal-injecting step, molten metal is poured into the die for producing a casting. Due to the high temperature of the molten metal, the flowability-improving material melts into the molten metal, to cause the freezing point depression of the molten metal.
摘要:
A metal casting fabrication method is provided. In accordance with the method, first a metal plate is disposed in the cavity of molding dies. This metal plate includes a first surface formed with a heat insulating layer, and a second surface opposite to the first surface. With the metal plate placed in the cavity, the heat insulating layer is held in contact with the dies, while the opposite or second surface is partially exposed to the cavity. The injected molten metal properly fills the cavity from end to end since its heat is not conducted unduly to the dies via the metal plate.
摘要:
A process for connecting at least two components, particularly body components of motor vehicles, wherein the first component has an undercut on a side facing the second component. In the area of the undercut, a connection piece is cast to the first component. The connection piece is designed such that, during its solidification, the connection piece is firmly connected with the first component by the contraction of a last-solidifying core area of the connection piece. Then the second component is mounted on the connection piece.
摘要:
A process for connecting at least two components, particularly body components of motor vehicles, wherein the first component has an undercut on a side facing the second component. In the area of the undercut, a connection piece is cast to the first component. The connection piece is designed such that, during its solidification, the connection piece is firmly connected with the first component by the contraction of a last-solidifying core area of the connection piece. Then the second component is mounted on the connection piece.
摘要:
Disclosed is a single-cast, thin wall structure capable of withstanding impinging gases at temperatures of 4300° F. and higher, and method of making the same.
摘要:
Disclosed is an integral single-cast multi wall structure including a very thin wall and a second thin wall. There is a passageway interposed between the pair of walls of the structure, and a high thermal conductivity member extends into said passageways and thermally couples the walls. The high thermal conductivity member increases the heat transfer between the walls of the structure. The present invention further includes a method for casting an integral structure having very thin walls that utilizes the high thermally conductive member in the casting process to hold the pattern and cores in alignment.
摘要:
Methods for casting thin-walled structural elements made of alloy for automobile bodies using the diecasting, thixocasting, or thixoforming methods, as well as corresponding structural elements are described. In order to produce by these methods in particular body side wall parts including the A, B and C pillars, the castings are cast in several casting slices. The casting slices of a casting are cast, staggered timewise in succession using the same method and from the same alloy but in different casting molds or different parts of a casting mold. At the seams, the casting slices are cast together along a defined shapewise contour. The casting slices can be case together indirectly with interposition of a separate seam strip. However, they can also be cast onto one another, with an already cast first casting slice being placed in a second casting mold and cast together therein with the second casting slice. Complete body side wall parts are cast in three casting slices, with the seams being located in the roof and sill areas.
摘要:
The castings are cast in several casting slices. The casting slices of a casting are cast, staggered timewise in succession using the same method and from the same alloy but in different casting molds or different parts of a casting mold. At the seams, the casting slices are cast together along a defined shapewise contour. The casting slices can be cast together indirectly with interposition of a separate seam strip. However, they can also be cast onto one another, with an already cast first casting slice being placed in a second casting mold and cast together therein with the second casting slice. Complete body side wall parts are cast in three casting slices, with the seams being located in the roof and sill areas.