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Multi-element small-amount high-formability magnesium alloy and short-process preparation method thereof

A magnesium alloy, high forming technology, applied in the field of metal materials, can solve the problems of unfavorable green production of enterprises, low solidification cooling rate, high alloying element content, shortening and homogenizing heat treatment, obvious market competitive advantage, and low alloy content. Effect

Pending Publication Date: 2019-09-06
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing magnesium alloy twin-roll casting method, the content of alloy elements used is relatively high, and the solidification cooling rate is low. In order to obtain good mechanical properties, long-term homogenization heat treatment and multi-pass rolling precision Rolling process is essential
This method consumes a lot of energy and has a long process, which is not conducive to the realization of green production by enterprises

Method used

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  • Multi-element small-amount high-formability magnesium alloy and short-process preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Taking the Mg-0.5Zn-0.5Ca-0.3Mn-0.3Sn alloy as an example, the batching is carried out according to the mass percentage, and the specific steps are as follows.

[0032] S1. Multivariate small amount alloy smelting:

[0033] (1) Prepare materials according to the above magnesium alloy composition content, including pure magnesium, pure zinc, pure tin, magnesium-calcium master alloy and magnesium-manganese master alloy.

[0034] (2) The protective gas is continuously introduced into the melting furnace, and the protective gas is SF 6 and CO 2 Preheat the pure magnesium ingot to 473K in the crucible, and then heat up to 973K for melting.

[0035] (3) After the magnesium ingot is melted, slag is removed to remove impurities and oxide layers on the surface of the melt to obtain a pure magnesium melt.

[0036] (4) Add pure zinc, pure tin, magnesium-calcium master alloy and magnesium-manganese master alloy which have been preheated at 373K to the above pure magnesium melt. ...

Embodiment 2

[0044] Taking the Mg-1.0Zn-0.8Ca-0.2Mn-0.1Sn alloy as an example, the batching is carried out according to the mass percentage, and the specific steps are as follows.

[0045] S1. Multivariate small amount alloy smelting:

[0046] (1) Prepare materials according to the above magnesium alloy composition content, including pure magnesium, pure zinc, pure tin, magnesium-calcium master alloy and magnesium-manganese master alloy.

[0047] (2) The protective gas is continuously introduced into the melting furnace, and the protective gas is SF 6 and CO 2 Preheat the pure magnesium ingot to 673K ​​in the crucible, and then heat up to 973K for melting.

[0048] (3) After the magnesium ingot is melted, slag is removed to remove impurities and oxide layers on the surface of the melt to obtain a pure magnesium melt.

[0049] (4) Adding pure zinc, pure tin, magnesium-calcium master alloy and magnesium-manganese master alloy preheated at 423K to the above pure magnesium melt respectively...

Embodiment 3

[0057] Taking the Mg-1.5Zn-0.2Ca-0.2Mn-0.2Sn alloy as an example, the batching is carried out according to the mass percentage, and the specific steps are as follows.

[0058] S1. Multivariate small amount alloy smelting:

[0059] (1) Prepare materials according to the above magnesium alloy composition content, including pure magnesium, pure zinc, pure tin, magnesium-calcium master alloy and magnesium-manganese master alloy.

[0060] (2) The protective gas is continuously introduced into the melting furnace, and the protective gas is SF 6 and CO 2 Preheat the pure magnesium ingot to 473K in the crucible, and then heat up to 953K for melting.

[0061] (3) After the magnesium ingot is melted, slag is removed to remove impurities and oxide layers on the surface of the melt to obtain a pure magnesium melt.

[0062] (4) Add pure zinc, pure tin, magnesium-calcium master alloy and magnesium-manganese master alloy which have been preheated at 373K to the above pure magnesium melt. ...

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Abstract

The invention provides a multi-element small-amount high-formability magnesium alloy. The multi-element small-amount high-formability magnesium alloy comprises the following chemical components of, byweight percentage, 0.1%-2.0% of zinc, 0.01%-0.8% of calcium, 0.08%-0.5% of manganese, 0.01%-0.3% of tin and the balance of magnesium and additive elements, wherein the additive elements comprise oneor more of titanium, samarium, aluminum and boron, and the total content of the element magnesium in the magnesium alloy is larger than 97.5 wt%. A short-process preparation method comprises the threesteps of multi-element small-amount alloy smelting, sub-rapid solidification double-roller casting rolling and annealing treatment. Due to the combination of a multi-element small-amount component design and a sub-rapid solidification double-roller casting rolling technology, a supersaturated high-solid-solution structure is obtained, grain refinement is realized, uniform heat treatment is remarkably shortened, and the link of finish rolling is omitted. The room temperature elongation rate of an obtained magnesium alloy sheet is larger than 20%, and the magnesium alloy sheet is relatively weak in basal texture and can be directly subjected to punch forming.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a magnesium alloy with a small amount of multiple components and high formability. Background technique [0002] As the lightest engineering metal structure material, magnesium alloy has the advantages of good specific strength, high conductivity, vibration damping, electromagnetic shielding, biocompatibility and recyclability. It is used in transportation, communication, biomedical and other fields There are broad prospects for development. Especially in terms of automobile lightweight, increasing the amount of magnesium alloy can significantly reduce the weight of the vehicle, so as to improve fuel economy, energy saving and emission reduction. [0003] However, magnesium has a close-packed hexagonal crystal structure with few slip systems and poor deformation ability at room temperature, which limits its further application. Wrought magnesium alloys can improve their...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C23/00C22C1/03C22C1/06C22F1/06B22D11/06
CPCB22D11/0611C22C1/03C22C1/06C22C23/00C22C23/04C22F1/06
Inventor 王慧远孟昭元王珵查敏马品奎李志刚王金国管志平宋家旺杨治政杜春风鞠虹
Owner JILIN UNIV
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