A method for preparing graphene-reinforced magnesium-based composites by injection molding
A composite material and injection molding technology, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as long production cycle, complex molding process, and difficult to control temperature accurately, and achieve strict process, advanced technology, accurate and detailed data Effect
Active Publication Date: 2019-12-17
ZHONGBEI UNIV
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Problems solved by technology
[0004] At present, graphene-reinforced magnesium-based composite materials are mainly prepared by powder metallurgy. This preparation method has complicated molding process and high equipment cost. It can only make parts with simple molding structure, and the production cycle is long; another common method is Melting and stirring casting method, the molding process of this method is complex, the temperature in the process is difficult to control accurately, and graphene is prone to agglomeration and burning at high temperature; compared with it, semi-solid injection molding has a relatively good effect on the preparation of graphene-reinforced magnesium-based composites. Many potential advantages, this technology is still under scientific research
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[0042] The present invention will be further described below in conjunction with accompanying drawing:
[0043] figure 1 As shown, it is the semi-solid thixotropic injection molding state diagram of the graphene-reinforced magnesium-based composite material. The position and connection relationship of each part must be correct, and the ratio should be adjusted according to the quantity and operation in sequence.
[0044] The mixing treatment of graphene magnesium alloy semi-solid slurry is carried out in a semi-solid thixotropic injection molding device, which is completed in the process of feeding, quantitative transportation, heating, screw shearing, preparation of semi-solid slurry, and high-speed injection molding;
[0045] The mixed graphene / magnesium alloy mixed particles 1 are added to the storage hopper 2 of the device, the storage hopper 2 is connected to the hopper 3 of the injection machine, the hollow part of the hopper 3 of the injection machine is the feeding scr...
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Abstract
The invention relates to a method for preparing a graphene-reinforced magnesium-based composite material by injection molding. It is aimed at the situation that graphene is not uniformly dispersed in a magnesium alloy matrix and is difficult to form a firm interface with the matrix. A semi-solid injection molding method is adopted. The alloy is the matrix and the graphene is the reinforcement. After powder mixing, feeding, quantitative transportation, heating, screw shearing, preparation of semi-solid slurry, and high-speed injection molding, the graphene-reinforced magnesium-based composite material is made. The equipment and method are advanced and The data is accurate and detailed, the process is strict, and the prepared graphene-reinforced magnesium-based composite material has a hardness of 82.2HV, a tensile strength of 235MPa, and an elongation of 7.22%. It is an advanced preparation method of graphene-reinforced magnesium-based composite materials.
Description
technical field [0001] The invention relates to a method for preparing a graphene-reinforced magnesium-based composite material by injection molding, and belongs to the technical field of preparation and application of non-ferrous metal composite materials. Background technique [0002] Graphene has excellent mechanical properties, thermal properties and electrical properties, and is an ideal reinforcement for the preparation of metal-based nanocomposites. By adding graphene to the magnesium matrix to prepare graphene-reinforced magnesium-based composites, its comprehensive properties can be improved. Thereby expanding the scope of application of magnesium alloys and creating favorable conditions for the industrial production of magnesium-based composite materials; however, graphene is easy to agglomerate and is difficult to disperse evenly in magnesium alloys, and its interface wettability is poor, so it is difficult to form a strong interface with magnesium and magnesium al...
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IPC IPC(8): B22F3/22B22F1/00C22C1/05C22C23/02
CPCB22F1/0003C22C1/05C22C23/02B22F3/225B22F1/142
Inventor 赵宇宏李沐奚张婷侯华梁建权陈利文
Owner ZHONGBEI UNIV