摘要:
The present invention is directed to a molten metal pump comprising an elongated pumping chamber tube with a base end and an open top end. A shaft extends into the tube and rotates an impeller therein, the impeller rotates proximate the base end. The tube has a diameter at least 1.1 times the diameter of the impeller. The pumping chamber tube preferably has a length at least three times the height of the impeller. The base end includes an inlet and the top end includes a tangential outlet. Rotation of the impeller draws molten metal into the pumping chamber and creates a rotating equilibrium vortex that rises up the walls of the pumping chamber. The rotating vortex adjacent the top end exists the device cia the tangential outlet.
摘要:
According to one embodiment, a molten metal impeller is provided. It includes a generally cylindrical graphite body having a plurality of passages extending from a top surface to a side wall. A hub is formed in the center of the graphite body. A ceramic cap member is secured to the top surface of the graphite body. The cap member is comprised of a ring forming a central passage shaped cooperatively to overlap the hub and a plurality of vanes extending radially from the ring to an outer rim. The rim has a height between adjacent vanes which increases in the direction of intended impeller rotation. The rim further has a height which decreases from its radially outer most edge to an inner most edge.
摘要:
A filter cartridge for a molten metal filtering system is provided with a modular construction in which the filter elements are adapted to be removably mounted to an end plate. The filter elements may be removed separately from the filter and replaced with new filter elements without removing the entire cartridge assembly. According to another aspect of the invention, the filter elements are provided with an elliptical cross-section.
摘要:
A process is disclosed for the formation of amorphous multi-metallic alloy coatings. More specifically, a chemical vapor deposition process is described wherein precursor compounds are induced to decompose upon a substrate under controlled parameters so as to form a coating on the substrate that is a substantially amorphous multi-metallic alloy. Preferred amorphous alloy compositions are also taught that are ideally synthesized by the claimed process.
摘要:
Amorphous metal-ceramic and microcrystalline metal-ceramic composites are synthesized by solid state reaction-formation methods. These metal-ceramic composites are characterized by a composition that ranges from about 75 to about 99.9 percent ceramic in about 0.1 to about 25 percent amorphous or microcrystalline metal binder phase.
摘要:
Amorphous metal alloy shapes are synthesized by providing an intimate mixture of the components of the amorphous alloy, which mixture includes at least one ductile component. The mixture may be subjected to well-known forming techniques at a temperature below the crystallization temperature of the amorphous metal alloy to be formed. The ductile component of the mixture acts as a binder matrix to provide strength and uniform properties to the formed object.
摘要:
An apparatus for moving a stream of molten metal comprising a pumping member, a housing at least partially enclosing the pumping member, a power device seated on a support, a shaft connecting the power device and the pumping member. At least one post is disposed between the support and the housing. The post includes an elongated rod surrounded by a heat resistant outer member. The rod includes a first end connected to the support and a second end secured within a cavity in the housing.
摘要:
A molten metal filter medium comprised of at least two opposed wedge-shaped plates having at least one hollow generally oblong member comprised of porous ceramic material attached at a first end to one of the plates and at a second end to the second plate, at least one of the plates including a passage to an outlet communicating with the hollow member, wherein molten metal can enter the filter through the hollow member and exit the filter through the passage in the end plate.
摘要:
The present invention is directed to a process for the synthesis of a compositionally graded substantially amorphous metal alloy comprising:(a) combining a bulk hydrogen storage material with an A-containing material to obtain a mixture thereof;(b) sealing the mixture in a mechanical milling device under an inert atmosphere; and(c) milling the mixture.Alloys produced by this process are useful for the efficient cyclic storage and release of hydrogen in large quantities without becoming embrittled, inactivated or corroded.
摘要:
The present invention relates to an amorphous metal alloys of the formula:Cr.sub.a X.sub.b M.sub.cwhereinX is at least one element selected from the group consisting of Pt, Pd, Ir, Rh and Ru;M is at least one element selected from the group consisting of P, B, N, C, As, Sb and S; and wherein a ranges from about 0.60 to abotu 0.96;b ranges from greater than zero to about 0.01;c ranges from about 0.04 to about 0.40; and with the provisor that a+b+c equals 1.00.