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公开(公告)号：US12195835B2
公开(公告)日：2025-01-14
申请号：US18234545
申请日：2023-08-16
Inventor： Lina Liu
Abstract: The present application relates to the technical field of material processing, and especially relates to a method for preparing a magnesium alloy bone screw bar via room-temperature rotary forging under alternating magnetic field in conjunction with cryogenic processing and a magnesium alloy bone screw product. The method specifically comprises the following steps: preparing an ingot, extruding the ingot into a magnesium-zinc-manganese alloy bar, performing room-temperature rotary forging under alternating magnetic field for plastic deformation, wherein the strength and hardness of the magnesium-zinc-manganese alloy are improved by the work hardening effect of magnesium alloy at room temperature, and meanwhile the microstructure is regulated; additionally, via the former and later cryogenic processing, the grain size and grain orientation uniformity can be effectively regulated in the magnesium alloy microstructure, and the magnesium alloy is effectively improved in plastic deformation ability, strength and corrosion resistance, and finally a magnesium alloy bone screw bar is obtained with excellent comprehensive properties in mechanical properties, corrosion resistance and biocompatibility, which can be mechanically processed into a magnesium alloy bone screw product.
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公开(公告)号：US12091736B2
公开(公告)日：2024-09-17
申请号：US17576276
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Lixin Huang , Zuo Xu , Meng Li , Shiwen Xu , Liguang Xie , Lijun Zhang
Abstract: The disclosure discloses a spinning process of a magnesium alloy wheel hub, which comprises the following steps: step 1, heating a magnesium alloy bar at 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 6-15 mm/s; step 3, finally forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 5-8 mm/s; step 4, stress relief annealing on the final forged magnesium alloy blank; step 5, solid dissolving on the annealed magnesium alloy blank; step 6, taking out the solid-dissolved blank and directly spinning by a spinning machine; step 7, heating treatment and aging treatment. The magnesium alloy wheel hub with excellent performance is obtained by the process, and the spinning process and processing efficiency are greatly improved.
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公开(公告)号：US11878333B2
公开(公告)日：2024-01-23
申请号：US17295944
申请日：2019-11-06
Applicant: Bayerische Motoren Werke Aktiengesellschaft
Inventor： Thomas Auer , Georgios Kalaitzidis , Joerg Kutter , Lisa-Marie Menter , Ulrich Schmid , Ruediger Striefler
CPC classification number: B21D22/022 , B21J1/06
Abstract: A method for hot forming a semifinished product in sheet form for a motor vehicle component. The method includes heating the semifinished product to be formed in a heating process and forming the heated semifinished product in a shaping forming process. During the heating process the semifinished product undergoes an input of heat from at least one heat source. During the heating of the semifinished product, a shielding device is arranged between the heat source and the semifinished product, such that the semifinished product is thermally shielded at least in certain portions in such a way that a first semifinished-product portion is heated differently than a second semifinished-product portion.
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公开(公告)号：US11745252B2
公开(公告)日：2023-09-05
申请号：US17576220
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Lixin Huang , Zuo Xu , Decai Kong , Jingru Shen , Meng Li , Tieqiang Chen , Qingzhu Zhang
Abstract: The disclosure discloses a method of producing a magnesium alloy wheel hub, comprises the following steps: step 1, heating a magnesium alloy bar to 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming the bar under a forging press, the forging speed is 6-15 mm/s; step 3, finally forging and forming the bar under a forging press, and the forging speed is 5-8 mm/s; step 4, testing the microstructure and material properties of the final forged blank to obtain the layered material property distribution on the thickness of the blank; step 5, according to the layered material property distribution on the thickness of the blank obtained in step 4, selecting the part that meets the requirements to make a magnesium alloy wheel hub. According to the different properties in the thickness direction of the blank, the spoke orientation of the magnesium alloy wheel can be quickly designed according to the needs, and the magnesium alloy wheel that meets the usage performance can be obtained, which greatly improves the design and processing efficiency.
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公开(公告)号：US20230150013A1
公开(公告)日：2023-05-18
申请号：US18156312
申请日：2023-01-18
Applicant: Ningbo Texoon Brassworks Co., Ltd.
Inventor： Zhenhua FENG , Jian YE
Abstract: A forging and pressing production systems enables at least one material to be formed by hot melt and forging and pressing by itself without human operation, thereby completing the mass production of the material. Operating factors such as the pressure, temperature and mold required for formation are taken into account, and the identification requirements for the material are reduced, thereby realizing large-scale production.
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Patent Agency Ranking
公开(公告)号：US20230080640A1
公开(公告)日：2023-03-16
申请号：US17576276
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Lixin Huang , Zuo Xu , Meng Li , Shiwen Xu , Liguang Xie , Lijun Zhang
Abstract: The disclosure discloses a spinning process of a magnesium alloy wheel hub, which comprises the following steps: step 1, heating a magnesium alloy bar at 350-430° C. and keeping the temperature for 20 minutes; step 2, initially forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 6-15 mm/s; step 3, finally forging and forming on the bar under a forging press, wherein the forging down-pressing speed is 5-8 mm/s; step 4, stress relief annealing on the final forged magnesium alloy blank; step 5, solid dissolving on the annealed magnesium alloy blank; step 6, taking out the solid-dissolved blank and directly spinning by a spinning machine; step 7, heating treatment and aging treatment. The magnesium alloy wheel hub with excellent performance is obtained by the process, and the spinning process and processing efficiency are greatly improved.
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公开(公告)号：US20230074156A1
公开(公告)日：2023-03-09
申请号：US17576239
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Lixin Huang , Zuo Xu , Meng Li , Tieqiang Chen , Hanqi Wu , Qingzhu Zhang
Abstract: The disclosure discloses a magnesium alloy for wheels, comprising in mass percentage: Al: 2-3.0 wt. %; Zn: 0.5-1.0 wt. %; Mn: 0.3-0.5 wt. %; Ce: 0.15-0.3 wt. %; La: 0.05-0.1 wt. %, the balance is Mg. The magnesium alloy of the present invention takes Al element and Mn element as main alloying elements, supplemented by trace Ce and La elements as alloying process, and the nano-scale Mn-rich precipitated phase obtained during homogenization and the segregation of rare earth elements Ce and La at the interface and grain boundary of Mn-rich precipitated phase are used to inhibit the coarsening during extrusion and forging, so as to improve the strength and plastic deformation ability of the alloy.
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公开(公告)号：US20230068369A1
公开(公告)日：2023-03-02
申请号：US17904697
申请日：2021-03-12
Applicant: HITACHI METALS, LTD.
Inventor： Yoji YAMASHITA , Chuya AOKI , Shinichi KOBAYASHI
Abstract: Provided is a method for manufacturing a hot-forged member, the method enabling efficient hot forging while preventing defects such as cracks even when a poor workability alloy is used as a material to be hot forged. A method for manufacturing a hot-forged member, comprising: a heating step of heating an unheated material for hot forging in a furnace to a hot forging temperature; a heat-resistant insulation material bonding step of bonding a heat-resistant insulation material to at least a part of a surface of a material for forging removed from the furnace to obtain a material to be hot forged; and a hot forging step of compressing a part or all of the material to be hot forged into a predetermined shape using any of a die, an anvil, and a tool.
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公开(公告)号：US11571734B2
公开(公告)日：2023-02-07
申请号：US16961923
申请日：2019-01-12
Applicant: Ningbo Texoon Brassworks CO., LTD
Inventor： Zhenhua Feng , Jian Ye
Abstract: The present invention provides a forging and pressing production management method, comprising the steps of: A. acquiring at least one characteristic of a fed material; B. correspondingly selecting, according to the characteristic of the material, at least one of the temperature, the pressure or a mold from among operating factors of the forging and pressing process; C. transporting the material according to the selection result; and D. processing the material until a finished product is produced. The present invention enables at least one material to be formed by hot melt and forging and pressing by itself without human operation, thereby completing the mass production of the material. Operating factors such as the pressure, temperature and mold required for formation are taken into account, and the identification requirements for the material are reduced, thereby realizing large-scale production.
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公开(公告)号：US20220297179A1
公开(公告)日：2022-09-22
申请号：US17836503
申请日：2022-06-09
Applicant: ILJIN STEEL CORPORATION
Inventor： Sung Ha KIM , Eui Hyouk HWANG , Young June PARK
Abstract: Provided are a hollow drive shaft using an upsetting method and a method of manufacturing the same, in which hot forging and upsetting processes are applied to both ends of a workpiece so that an outer diameter at both ends of the workpiece is greater than an outer diameter of a middle part of the workpiece, thereby reducing a weight of the drive shaft and enabling the drive shaft to transmit higher driving power. According to the present invention, the upsetting process is applied during the hot forging process to manufacture the hollow drive shaft, portions to be substantially processed are limited to portions at both ends of the workpiece, and the number of upsetting processes is limited to a minimum number (2 or the like), such that initial investment costs and manufacturing costs are low because the number of processes is small.
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