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High-strength and high-plasticity cast Mg-Ni-Y alloy and preparation method thereof

A mg-ni-y, high plasticity technology, applied in the field of magnesium alloy and its preparation, Mg-Ni-Y alloy and its preparation, can solve the problems of low elongation, decreased strength, low production efficiency, etc., to achieve alloy strength And elongation increase, reduce the process of homogenization treatment, reduce the effect of the generation of inclusions

Inactive Publication Date: 2019-03-29
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a structural material for vehicles, the strength of ordinary cast magnesium alloys is less than 300MPa, and that of deformed magnesium alloys is less than 400MPa, and the strength drops sharply when working at 100°C, which severely limits the application of magnesium alloys in load-bearing structural parts.
[0008] In summary, the existing high-strength and high-plasticity magnesium alloys have problems such as complex alloy composition, low elongation, difficult processing and forming, cumbersome processing technology, low production efficiency, high preparation cost, and limited application, which cannot meet the engineering requirements. Urgent needs

Method used

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  • High-strength and high-plasticity cast Mg-Ni-Y alloy and preparation method thereof
  • High-strength and high-plasticity cast Mg-Ni-Y alloy and preparation method thereof
  • High-strength and high-plasticity cast Mg-Ni-Y alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this embodiment, a high-strength and high-plasticity casting Mg-Ni-Y alloy, the components of the alloy and their mass percentages are: 1.43wt.% Ni, 3.23wt.% Y, and the balance is Mg.

[0031] In this embodiment, a method for preparing a high-strength and high-plasticity cast Mg-Ni-Y alloy comprises the following steps:

[0032] a. Raw material preparation: the Ni of 1.43wt.% is respectively carried out by mass fraction, the Y of 3.23wt.% and the balance are the proportioning of magnesium to carry out raw material weighing batching;

[0033] b. Vacuumize the smelting furnace: adopt a vacuum suspension smelting furnace, place the Ni and Y raw materials prepared in the step a in the smelting furnace, and evacuate the smelting furnace for 10 to 25 minutes until the vacuum degree reaches 10 -4 Pa;

[0034] c. Smelting Ni-Y master alloy: After the vacuuming process of the smelting furnace in the step b is completed, fill the smelting furnace with argon until the pressure...

Embodiment 2

[0040] This embodiment is basically the same as Embodiment 1, especially in that:

[0041] In this embodiment, a high-strength and high-plasticity casting Mg-Ni-Y alloy, the alloy components and their mass percentages are: 2.33wt.% Ni, 5.27wt.% Y, and the balance is Mg.

[0042] In this embodiment, a method for preparing a high-strength and high-plasticity cast Mg-Ni-Y alloy comprises the following steps:

[0043] a. Raw material preparation: the Ni of 2.33wt.% is respectively carried out by mass fraction, the Y of 5.27wt.% and the balance are the proportioning of magnesium to carry out raw material weighing batching;

[0044] b. This step is the same as in Embodiment 1;

[0045] c. This step is the same as in Embodiment 1;

[0046] d. This step is the same as in Embodiment 1;

[0047] e. This step is the same as in Embodiment 1.

[0048] In the Mg-Ni-Y alloy ingot prepared in this example, Y and Ni form a long-period ordered phase and are dispersed in the Mg alloy matrix,...

Embodiment 3

[0051] This embodiment is basically the same as the previous embodiment, and the special features are:

[0052] In this embodiment, a high-strength and high-plasticity casting Mg-Ni-Y alloy, the components of the alloy and their mass percentages are: 2.97wt.% Ni, 7.25wt.% Y, and the balance is Mg.

[0053] In this embodiment, a method for preparing a high-strength and high-plasticity cast Mg-Ni-Y alloy comprises the following steps:

[0054] a. Raw material preparation: the Ni of 2.97wt.% is respectively, the Y of 7.25wt.% and the balance are the proportioning of magnesium to carry out raw material weighing batching by mass fraction;

[0055] b. This step is the same as in Embodiment 1;

[0056] c. This step is the same as in Embodiment 1;

[0057] d. This step is the same as in Embodiment 1;

[0058] e. This step is the same as in Embodiment 1.

[0059] In the Mg-Ni-Y alloy ingot prepared in this example, Y and Ni form a long-period ordered phase and are dispersed in the ...

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Abstract

The invention discloses a high-strength and high-plasticity cast Mg-Ni-Y alloy and a preparation method thereof. The high-strength and high-plasticity cast Mg-Ni-Y alloy is prepared from the followingcomponents in percentage by mass: 1-5% of Ni, 1-10% of Y and the balance of Mg. According to the high-strength and high-plasticity cast Mg-Ni-Y alloy and the preparation method thereof, a magnesium alloy is strengthened through long-period ordered phases, and the mechanical properties of the prepared as-cast state Mg-Ni-Y alloy at the room temperature can be achieved, specifically, the compressive strength is 430-490 MPa, and the elongation rate is 26-34%; and the alloy is smelted through a vacuum suspension smelting furnace, direct casting forming is conducted, inclusions in the smelting process can be reduced, the uniformity of the alloy components is improved, the subsequent homogenization treatment process is reduced, energy sources are saved, and the production efficiency is improved. Compared with the prior art, a preparation technology of the high-strength and high-plasticity cast Mg-Ni-Y alloy is simpler, the strength of the alloy is improved, the elongation rate of the alloyis increased, and the application range of the magnesium alloy in the field of cars is expanded.

Description

technical field [0001] The invention relates to a magnesium alloy and a preparation method thereof, in particular to a Mg-Ni-Y alloy and a preparation method thereof, which are applied in the technical field of lightweight vehicle structural materials. Background technique [0002] In the automotive industry, lightweight is an inevitable trend of future technological development. Automobile lightweight refers to reducing the weight of automobiles by means of lightweight materials, lightweight design technology, and lightweight manufacturing technology under the premise of ensuring the performance of automobile use and safety. Magnesium alloys have great application prospects in the automotive industry due to their low density, high specific strength, and damping properties. [0003] As a structural material for vehicles, the strength of ordinary cast magnesium alloys is less than 300MPa, and that of deformed magnesium alloys is less than 400MPa, and the strength drops sharp...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C23/06C22C1/03
CPCC22C1/03C22C23/00C22C23/06
Inventor 李谦罗群刘成周国治
Owner SHANGHAI UNIV
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