A method for preparing magnesium alloy with multi-scale precipitation lamellar structure
A magnesium alloy, multi-scale technology, applied in the field of preparation of multi-scale precipitation lamellar structure magnesium alloy, can solve the problems of poor deformation ability of magnesium alloy, difficult to control interface oxidation, single component of mixed crystal material, etc., and achieves good heat resistance. Effects of performance, design directivity and flexibility of large microstructures
Active Publication Date: 2021-05-04
NANJING UNIV OF SCI & TECH
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Problems solved by technology
However, due to the poor deformability of the magnesium alloy itself, the lamellar Mg / Al alloy prepared by accumulative lamination needs to be carried out at high temperature, and there are technically the following problems: (1) it is difficult to control the oxidation of the interface; (2) high temperature It is easy to make the grain size grow, and it is impossible to obtain nano-scale or sub-micron grains; (3) The strengthening and toughening properties of layered Mg / Al composite materials have obvious directionality, which limits their use in many-to-many Application to parts with force requirements
However, the mixed crystal material prepared in this way has a single component and poor heat resistance
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[0023] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0024] Such as Figure 1-5 As shown, according to the Mg-Y phase diagram, Mg-8Y with a higher melting point is selected as a solid state, and Mg-3Y with a lower melting point is used as a liquid state. As an example, detailed implementation methods and specific operations are provided. The following examples relate to three The step-by-step process includes: pretreatment, casting, multi-scale precipitation, among which:
[0025] Such as figure 1 As shown, the surface of the solid Mg-8Y plate is chemically cleaned to remove oil and oxides on the surface, and then the surface is galvanized. The galvanized layer is ...
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Abstract
A method for preparing a magnesium alloy with a multi-scale precipitation lamellar structure, including: pretreatment, casting and multi-scale precipitation, etc., selecting two or more magnesium alloys with different strengthening effect behaviors, and performing solid-liquid inlay casting to form multiple Laminated magnesium alloy. Then, through rolling and subsequent aging treatment, multi-scale precipitates are formed between the layers, and a multi-scale precipitation-strengthened laminate structure magnesium alloy composite material is obtained. The obtained alloy has both the toughness and strength of the soft phase and the hard phase to a certain extent, and a high-strength, high-toughness dual-system or multi-system precipitation-strengthened magnesium alloy with excellent comprehensive performance is obtained. Precipitation-strengthened magnesium alloys have better heat resistance, and their toughness is much higher than that of conventional uniformly precipitated magnesium alloys. And the mixed precipitation microstructure has no obvious directionality, which is suitable for application on multi-directional stressed parts.
Description
technical field [0001] The invention relates to a method for preparing a magnesium alloy with a multi-scale precipitation lamellar structure, specifically a method for preparing a magnesium alloy with a solid-liquid combination of two or more types of magnesium alloys with different precipitation strengthening effects by using inlay casting, and performing a process on the prepared material Aging treatment, using different aging precipitation behaviors of magnesium alloys, to obtain a multi-scale precipitation multilayer magnesium alloy preparation method. Background technique [0002] Magnesium alloy is currently the lightest metal structure material in practical application, and it is being increasingly widely used in the fields of national defense, aerospace, automobile, electronic communication and so on. Compared with other light metal structural materials such as aluminum alloys and titanium alloys, magnesium alloys have poorer strength and toughness. A large number o...
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IPC IPC(8): B22D19/16C22C23/06C22C1/03C22F1/06C22F1/02
CPCB22D19/16B22D19/0081C22C23/06C22C1/03C22F1/06C22F1/02C22C1/12
Inventor 陈雪飞周浩高波李玉胜曹阳聂金凤
Owner NANJING UNIV OF SCI & TECH