摘要:
A method of electroslag refining of metal is taught. The method starts with the introduction of unrefined metal into an electroslag refining process in which the unrefined metal is first melted at the upper surface of the refining slag. The molten metal in the form if droplets is refined as it passes through the molten slag. The refined metal droplets are collected in a cold hearth apparatus having a skull of refined metal formed on the surface of the cold hearth and protecting the cold hearth from the leaching action of the refined molten metal. A cold finger bottom pour spout is formed at the bottom of the cold hearth to permit dispensing of molten refined metal from the cold hearth. The rate of flow of molten metal through the cold finger apparatus is controlled by controlling the rate of melting of the unrefined metal; by controlling the hydrostatic head of molten metal and salt above the bottom pour cold finger orifice; by controlling the rate of induction heat supplied to the metal within the cold finger apparatus; by controlling the rate of heat removal from the metal within the cold finger apparatus through the cold finger apparatus itself and through adjacent gas cooling means; and by applying force to slow down and/or interrupt the flow of metal through the cold finger apparatus.
摘要:
An improved high performance x-ray system having a rotating anode therein which includes an improved target/stem assembly comprising a metallic target and a large bore, thin-walled tubular metal stem which, when connected to a rotor body assembly, provides a rotating x-ray tube anode assembly is disclosed. An insert of an alloy, for example, tantalum alloy, is placed between the target layer and the large bore, thin-walled tubular stem and then bonded thereto to produce a composite x-ray tube target/stem assembly. The target/stem assembly is then connected to a rotor body assembly by fasteners, preferably threaded, applied through a plate connected to the tubular stem and preferably through a thermal washer to produce a rotating anode assembly having high bond strength that provides acceptable balance during x-ray tube operations.
摘要:
A method of making a high performance x-ray system having a rotating anode includes making target/tubular stem assembly and then assembling it to a rotor body assembly. This particular method reduces tube failure due to anode assembly imbalance and provides an improved rotating x-ray tube anode assembly.
摘要:
Two Nb.sub.3 Sn superconducting tapes are overlapped by an amount equal to about two times the width of the superconducting tapes. A filler material of material substantially similar to the tapes is placed between the two tapes in the overlapped region. A NdYAG laser (4) sends a 20-40 watt beam focused by a lens that heats the tapes to create a bridge of superconductivity material formed over the region where the tapes are joined.
摘要:
An apparatus for solder joining metal tapes to form laminated metal tapes comprises a channel means having a base, and sidewall means extending therefrom to a cover extending over the sidewall means. The sidewall means define converging channels having an entrance end for admitting the tapes spaced apart, and an exit end where facing tape surfaces can come into contact. The sidewall means separate the base and cover by a distance selected to align the tapes in the width dimension. The cover having a first section extending from the exit end, and a second section extending from the first section to the entrance end, the second section being formed with a cavity facing the channel that permits a solder flow therethrough that minimizes accumulation of particles in the channels. A solder duct means mounted on the channel means for directing molten solder into the channels to flow from the exit end to the entrance end. The solder duct means having a slot extending therethrough and aligned with the exit end. A seal means mounted on the solder duct means adjacent the slot for minimizing solder escaping from the slot while solder coated tapes pass therefrom, and a wiper means mounted on the solder duct means and positioned from the seal means removes exess solder from tapes passing through the seal means.
摘要:
Superconducting tapes having an inner laminate comprised of a parent-metal layer, a superconductive alloy layer on the parent-metal, a reactive-metal layer, and an outer laminate soldered thereon are joined in a superconducting joint by the method of this invention. The outer laminate is removed to form exposed sections, and the tapes are positioned so that the exposed sections are in contact. A melt zone within the exposed sections where the exposed sections are in contact is melted. The melt zone is at least large enough to provide sufficient parent-metal, superconductive alloy, and reactive-metal to form a melt that resolidifies as a continuous precipitate of the superconductive alloy. The melt resolidifies as a continuous precipitate of the superconductive alloy that is continuous with the superconductive alloy on the superconducting tape. Optionally, sections of the outer laminate material corresponding to the size of the exposed sections are bonded to the outermost surfaces of the joined exposed sections.
摘要:
A method is described which increases the critical current of triniobium tin by bonding thermal contraction control layers to the triniobium tin superconducting articles at a process temperature to form a composite, and subsequently cooling the composite to a test temperature.
摘要:
Methods of making an improved high performance x-ray system having a rotating anode therein which includes an improved target/tubular stem combination which, when combined with a rotor body assembly, reduces tube failure due to anode assembly imbalance and methods of bonding a metallic target and a metal tubular stem and connecting the combination to a rotor body assembly to provide a rotating x-ray tube target are disclosed. An insert of an alloy, for example, tantalum or its alloys, is placed between the target and the niobium-alloy tubular stem and then bonded thereto to produce the x-ray tube target/tubular stem assembly having a high remelt temperature and bond strength which, when connected, such as by bolting to the rotor body assembly, the resulting anode assembly retains proper balance during x-ray tube operations.
摘要:
An apparatus for solder joining metal tapes to form laminated metal tapes comprises an alignment box having a base and a sidewall means extending therefrom to define a tapered inner channel extending through the box. The tapered channel having an entrance end and narrowing to an exit end. At least one tapered wall extending from the base and within the inner channel to define subchannels that are spaced at the entrance end and converge into the inner channel before the exit end. The sidewall means and tapered wall extending from the base to respective wall tops, and a cover extending over the channel and subchannels is mounted on the wall tops. The base, sidewalls, inner wall, and cover being configured to form the channel and subchannels to have a first preselected distance between the base and cover that is greater than the width of the tapes. A second preselected distance between oppositely facing walls bordering the subchannels that is greater than the thickness of the tapes, and a third preselected distance between oppositely facing walls at the exit end that is greater than the thickness of the laminated tapes. A solder duct means mounted on the box for directing molten solder into the inner channel to flow from the exit end to the entrance end. The solder duct means having a slot extending therethrough and aligned with the exit end. A seal means mounted on the solder duct means adjacent the slot for minimizing solder escaping from the slot while solder coated tapes pass therefrom, and a wiper means mounted on the solder duct means and positioned from the seal means removes excess solder from tapes passing through the seal means.
摘要:
A system for sealing a large diameter tube under vacuum including: a tube having a diameter greater than about 20 mm, a disk operatively positioned inside the tube and having a smaller diameter than the tube, a vacuum operatively connected to the tube, heating means, operatively positioned on the outside of the tube, for heating the tube to a temperature sufficient to collapse the tube onto the disk, means for positioning the disk inside the tube proximate the position of the heating means on the outside of the tube and means for cooling the tube proximate the disk sufficiently to formulate a seal between the tube and the disk where the disk collapsed onto the disk is disclosed.