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公开(公告)号：US20240316626A1
公开(公告)日：2024-09-26
申请号：US18610230
申请日：2024-03-19
申请人： Rajeev Naik
发明人： Rajeev Naik
CPC分类号： B22D45/00 , B22D27/045
摘要： A casting furnace for manufacture of metal and/or ceramic components at high production rate is disclosed. The casting furnace comprises a melting chamber, a dual zone mold heating chamber and a dual zone mold cooling chamber. The melting chamber provides a source of molten alloy or ceramics with adequate superheat. The dual zone mold heating chamber includes an independently controlled primary heating zone and the secondary heating zone. The primary heating zone raises the mold temperature adequately to impart high gradient solidification conditions. The secondary heating zone assists the primary heating zone to minimize overheating of the majority of the mold. The dual zone mold cooling chamber comprises a primary cooling chamber and a secondary cooling chamber. The primary cooling chamber speeds up solidification in order to prevent defect formation and refine microstructure. The secondary cooling chamber slows down the cooling of castings to reduce residual stresses build up and minimize elemental segregation through augmenting solid-state diffusion of lower melting elements.
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2.发明授权公开(公告)号：US12083589B2
公开(公告)日：2024-09-10
申请号：US18254966
申请日：2021-12-02
申请人： SAFRAN
发明人： Pierre Jean Sallot
IPC分类号： B22D11/112 , B22D11/00 , B22D11/041 , B22D11/14 , B22D21/00 , B22D27/04 , B22D41/015 , C22C1/02 , C22C14/00
CPC分类号： B22D41/015 , B22D11/001 , B22D11/041 , B22D11/112 , B22D11/141 , B22D21/005 , B22D27/04 , C22C1/02 , C22C14/00
摘要： A method for obtaining a product made of titanium alloy or a titanium-aluminum intermetallic compound by plasma torch melting, the alloy having an oriented structure, the method including heating the molten alloy surface in a casting ring with a plasma torch; cooling a cold zone of the casting ring over a length L1, the cooling forming a semi-solid crown of alloy; heating a hot zone of the casting ring over a length L2, thereby forming a solidification front, the flatness of which relative to a plane perpendicular to a drawing direction is less than 10°; and drawing the solidified alloy at a speed of more than 10−4 m/s in the drawing direction. The present disclosure also relates to a plant having one or more devices for implementing the method.
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公开(公告)号：US12076784B1
公开(公告)日：2024-09-03
申请号：US18371732
申请日：2023-09-22
申请人： RTX Corporation
CPC分类号： B22D27/045 , B22C9/065
摘要： A casting shell has: a part cavity shaped for casting the part; a starter/selector cavity below and connected to the part cavity; a connector cavity between the starter/selector cavity and the part cavity; and a support cavity. The support cavity has: a post section; a first linking section linking the post section to the starter section of the starter/selector cavity; and a second linking section linking the post section to the connector cavity, the second linking section having a portion descending from the post section toward the connector cavity.
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4.发明公开公开(公告)号：US20240189896A1
公开(公告)日：2024-06-13
申请号：US18554495
申请日：2022-04-07
申请人： Sasan Dadbakhsh
发明人： Sasan Dadbakhsh
CPC分类号： B22D27/045 , B22F10/20 , B33Y10/00 , B33Y40/20
摘要： A method of manufacturing a component includes the steps of: providing an additively manufactured component; providing a housing having the component; filling the housing having the component with a filler material for forming a mould of the component; and melting and cooling the component for forming a single-crystal microstructure of the component.
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公开(公告)号：US12005493B2
公开(公告)日：2024-06-11
申请号：US17829786
申请日：2022-06-01
CPC分类号： B22D27/04 , B22D27/045 , C30B11/14 , C30B29/52
摘要： A casting method includes forming a seed. The seed has a first end and a second end and an inner diameter (ID) surface and an outer diameter (OD) surface. The seed second end is placed in contact or spaced facing relation with a chill plate. The first end is contacted with molten material. The molten material is cooled and solidified so that a crystalline structure of the seed propagates into the solidifying material. At least a portion of the seed contacted with the molten material has a solidus higher than a solidus of at least an initial pour portion of the molten material.
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公开(公告)号：US11951540B2
公开(公告)日：2024-04-09
申请号：US17606455
申请日：2020-02-27
申请人： ZHEJIANG UNIVERSITY
发明人： Hua Wei , Yadan Xie , Jianjiang Zhao , Weian Lin , Ze Zhang , Yunmin Chen
CPC分类号： B22D27/045 , B22D46/00 , H05B3/03
摘要： Provided is a supergravity directional solidification melting furnace equipment, including a supergravity test chamber and, mounted in the supergravity test chamber, a high-temperature heating subsystem, a crucible, and an air-cooling system. The supergravity test chamber is mounted with a wiring electrode and a cooling air valve device. The high-temperature heating subsystem is fixed in the supergravity test chamber. The crucible and the air cooling system are provided in the high-temperature heating subsystem. The high-temperature heating subsystem includes upper, middle, and lower furnaces, a mullite insulating layer, upper and lower heating cavity outer bodies, upper and lower heating furnace pipes, and a crucible support base. A high-temperature heating cavity is divided into upper and lower parts, is provided therein with a spiral groove, and is fitted with a heating element. The crucible support base is provided therein with a vent pipe channel into which a cooling air is introduced. The crucible and the air cooling system include air inlet and exhaust pipes, a cooling base, a cooling rate adjustment ring, the crucible, and an exhaust cover.
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公开(公告)号：US20240075522A1
公开(公告)日：2024-03-07
申请号：US18387200
申请日：2023-11-06
申请人： RTX Corporation
CPC分类号： B22D27/045 , B22D21/025 , C30B11/14
摘要： A casting method includes: forming a seed, the seed having a first end and a second end, the forming including bending a seed precursor; placing the seed second end in contact or spaced facing relation with a chill plate; contacting the first end with molten material; and cooling and solidifying the molten material so that a crystalline structure of the seed propagates into the solidifying material. The forming further included reducing a thickness of the seed proximate the first end relative to a thickness of the seed proximate the second end.
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公开(公告)号：US11920205B2
公开(公告)日：2024-03-05
申请号：US17664429
申请日：2022-05-23
发明人： Masayuki Itamura , Haruki Itofuji , Mitsuru Adachi
摘要： The present invention provides a casting method and cast product of spherical graphite cast iron, in which, even with a small modulus, there is no chill, the spherical graphite in the tissue is further made ultrafine, the dispersion of the particle diameter is small, and the number of the particles is several times that of the conventional one in the as cast state where heat treatment is not carried out. A casting method of a spherical graphite cast iron includes a melting process, a spheroidizing treatment process, an inoculation process, and a casting process, in which the original molten metal after the inoculation process is poured and filled up to a product space through a gate of a metal mold; where the original molten metal is controlled to a semi-solidification temperature range, before being filled up to the product space.
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公开(公告)号：US20240051018A1
公开(公告)日：2024-02-15
申请号：US18277800
申请日：2022-02-03
申请人： EBIS CORPORATION
发明人： Yoshio EBISU
CPC分类号： B22D27/045 , B22D27/02 , B22D27/003
摘要： This invention is concerned with the production of directionally solidified castings or ingots to eliminate casting defects such as macrosegregation and misoriented grain defects that occur in the blades for jet engines and industrial gas turbines. The mechanism of the occurrence of the above casting defects was clarified by the computer simulation system developed by this inventor, and it was found that, by strongly cooling the solid phase region and applying an axial static magnetic field, the heat pulses at the solidification interface due to convection of the liquid phase can be suppressed, and harmful lateral liquid flow in the solid-liquid coexisting phase can be suppressed by the synergistic effect of these two measures. This eliminates casting defects such as macrosegregation and misoriented grain defects, also refines the microstructure to produce high-quality products with excellent mechanical properties (creep strength). Regarding the strength of the static magnetic field, it was found that there is a range where the macrosegregation becomes minimum in a relatively low magnetic field range. This makes it possible to keep the required magnetic strength low, which significantly reduces the price of expensive superconducting coils. In addition, productivity can be improved by increasing the withdrawal speed.
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公开(公告)号：US20230278095A1
公开(公告)日：2023-09-07
申请号：US17685105
申请日：2022-03-02
申请人： Qingyou Han
发明人： Qingyou Han , Jianhua Wu , Dashan Sui
摘要： A process for high integrity castings of metals and their alloys includes the steps of providing at least a sand mold at desired elevated temperatures, delivering a molten metal into the mold, and supplying a predetermined amount of coolant to contact the surfaces of the casting at desired rates, times, and durations to achieve an acceptable level of progressive solidification from the distal end of the casting towards the riser until the casting has reached desired temperatures.
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