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11.发明公开公开(公告)号：US20230193433A1
公开(公告)日：2023-06-22
申请号：US17576294
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Lixin Huang , Zhihua Zhu , Shiwen Xu , Jingru Shen , Liguang Xie , Naizheng Hu
Abstract: The disclosure discloses a high-speed spinning magnesium alloy and a preparation method thereof, the magnesium alloy has Mg-AI-Zn-Mn-Sr alloy with a high formability and high strength, and its chemical composition mass percentage is: Al: 2.4-4.5 wt.%; Zn: 0.6-1.2 wt.%; Mn: 0.4-0.6 wt.%; Sr: 0.15-0.3 wt.%; the balance is Mg. The present disclosure adopts the principle that by increasing the content of Mn in the magnesium alloy, a large amount of Mn-rich phase is generated during the alloy preparation process, and the degree of subcooling is controlled so that a fine spherical dispersed nano-scale Mn-rich phase is obtained during the solidification process. The nano-scale Mn-rich precipitate phase can pin the grain boundaries and inhibit the grain boundary migration to refine grains and achieve the effect of improving the strength. The divorced eutectic Mg17Al12 phase generated during the casting process will deteriorate the structure, so Sr is added to the alloy, Sr combining with Al to suppress the coarse phase of divorced eutectic Mg17Al12, refine the grains, increase the amount of eutectic, and reduce the risk of thermal cracking of large-size cast bars. In addition, Sr weakens the texture during the high-temperature spinning forming process and reduces the risk of cracking during the spinning tension, which is beneficial to high-speed spinning forming.
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公开(公告)号：US20220307118A1
公开(公告)日：2022-09-29
申请号：US17576201
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Tieqiang Chen , Zuo Xu , Zhihua Zhu , Qingzhu Zhang , Lixin Huang , Meng Li
Abstract: The disclosure discloses a method for manufacturing special purpose vehicle wheels by using 7000 series aluminum alloys, comprising the following steps: step 1, smelting 7000 series aluminum alloys in a smelting furnace; step 2, making the solution obtained in step 1 into an aluminum alloy ingot blank through a spraying and forming process; step 3, extruding the aluminum alloy ingot blank of step 2 to obtain an extrusion bar; step 4, sawing the extrusion bar into blanks and heating them; step 5, rolling the blank into a cake; step 6, putting the cake into a press for forging and forming; step 7, spinning and forming the wheel rim. The wheel manufactured by the method for manufacturing special vehicle wheels with 7000 series aluminum alloys in the present disclosure has high and stable conductivity, qualified impact test and good bending and radial fatigue performance.
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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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Patent Agency Ranking
14.发明授权公开(公告)号：US11827958B2
公开(公告)日：2023-11-28
申请号：US17576294
申请日：2022-01-14
Applicant: CITIC Dicastal Co., Ltd.
Inventor： Lixin Huang , Zhihua Zhu , Shiwen Xu , Jingru Shen , Liguang Xie , Naizheng Hu
Abstract: The disclosure discloses a high-speed spinning magnesium alloy and a preparation method thereof, the magnesium alloy has Mg—Al—Zn—Mn—Sr alloy with a high formability and high strength, and its chemical composition mass percentage is: Al: 2.4-4.5 wt. %; Zn: 0.6-1.2 wt. %; Mn: 0.4-0.6 wt. %; Sr: 0.15-0.3 wt. %; the balance is Mg. The present disclosure adopts the principle that by increasing the content of Mn in the magnesium alloy, a large amount of Mn-rich phase is generated during the alloy preparation process, and the degree of subcooling is controlled so that a fine spherical dispersed nano-scale Mn-rich phase is obtained during the solidification process. The nano-scale Mn-rich precipitate phase can pin the grain boundaries and inhibit the grain boundary migration to refine grains and achieve the effect of improving the strength. The divorced eutectic Mg17Al12 phase generated during the casting process will deteriorate the structure, so Sr is added to the alloy, Sr combining with Al to suppress the coarse phase of divorced eutectic Mg17Al12, refine the grains, increase the amount of eutectic, and reduce the risk of thermal cracking of large-size cast bars. In addition, Sr weakens the texture during the high-temperature spinning forming process and reduces the risk of cracking during the spinning tension, which is beneficial to high-speed spinning forming.
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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：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：US11332814B2
公开(公告)日：2022-05-17
申请号：US16508290
申请日：2019-07-10
Applicant: CITIC Dicastal CO., LTD.
Inventor： Zuo Xu , Kedi Ding , Haibo Qiao , Lixin Huang , Lisheng Wang , Zhendong Zhang
Abstract: A high-strength and high-toughness magnesium alloy includes a Mg—Al—Bi—Sb—Zn—Sr—Y—Mn alloy, prepared from the following components in percentage by mass: 7.0 to 10.0% of Al, 0.2 to 2.0% of Bi, 0.2 to 0.8% of Sb, 0.2 to 0.5% of Zn, 0.1 to 0.5% of Sr, 0.03 to 0.3% of Y, 0.05 to 0.1% of Mn and a balance of Mg.
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