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A method of preparing high-strength and toughness magnesium alloy wire by baking

A magnesium alloy and wire technology, which is applied in the field of preparing magnesium alloy wire with high strength, high yield ratio and high toughness, can solve the problem that the safety and reliability of engineering applications cannot be guaranteed, the yield ratio and toughness cannot be effectively improved, and the increase Production costs and other issues, to achieve good application prospects, conducive to environmental protection, the effect of saving materials

Active Publication Date: 2020-09-04
天津市金镁轮科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alloying is mainly to increase solid solution strengthening and aging strengthening by adding a large amount of expensive noble metal elements and rare earth elements, but this method not only cannot effectively improve the yield ratio and toughness, but also greatly increases the production cost, and cannot guarantee Safety and reliability in engineering applications
Although severe plastic deformation can obtain higher yield strength and yield ratio, the prepared wires usually have poor toughness, and because the processed materials are limited by the size of the mold, there are many processes, low production efficiency and high cost, so it is difficult to put them into industrial applications.

Method used

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  • A method of preparing high-strength and toughness magnesium alloy wire by baking
  • A method of preparing high-strength and toughness magnesium alloy wire by baking
  • A method of preparing high-strength and toughness magnesium alloy wire by baking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In this embodiment, the raw material is Mg-0.4Ca-0.03Y (atomic percentage), and a cylindrical magnesium alloy ingot with a diameter of 3 mm is cast by semi-continuous casting. After solution treatment, several times of drawing are carried out at room temperature. The processing rate of each pass does not exceed 15%, and the intermediate annealing and water quenching are carried out at 420°C for 60 minutes after each drawing. After the last pass, a wire rod with a diameter of 1 mm was obtained, which was baked at 200° C. for 30 minutes and quenched in water. As a comparison, another sample was still annealed at 420°C for 60 minutes after the same casting and drawing process without baking. Subsequently, the mechanical properties of the two samples were tested at room temperature. Test results such as figure 1 shown.

[0022] Comparing the engineering stress-engineering strain curves between the two shows that the yield strength and elongation of the alloy without baki...

Embodiment 2

[0024] In this example, the raw material is Mg-0.6Zn-0.04Y (atomic percentage), and the semi-continuous casting method is used to cast a cylindrical magnesium alloy ingot with a diameter of 4.2 mm. After solution treatment, several times of drawing are carried out at room temperature. , the processing rate of each pass is not more than 15%, and the intermediate annealing and water quenching are carried out at 390 ° C for 100 minutes after each drawing. After the last pass, a wire rod with a diameter of 1.5 mm was obtained, which was baked at 190° C. for 40 minutes and quenched in water. As a comparison, another sample was still annealed at 390°C for 100 minutes after the same casting and drawing process without baking. Subsequently, the mechanical properties of the two samples were tested at room temperature. The test results are shown in Table 1.

[0025] Table 1

[0026]

[0027] Comparing the mechanical properties between the two, it can be seen that the yield strengt...

Embodiment 3

[0029] In this example, the raw material is Mg-0.9Sn-0.15Y (atomic percentage), and the semi-continuous casting method is used to cast a cylindrical magnesium alloy ingot with a diameter of 4.5 mm. After solution treatment, several times of drawing are carried out at room temperature. , The processing rate of each pass is not more than 15%, and the intermediate annealing and water quenching are carried out at 440°C for 100min after each drawing. After the last pass, a wire rod with a diameter of 1.6 mm was obtained, which was baked at 150° C. for 100 min and quenched in water. As a comparison, another sample was still annealed at 440°C for 100 minutes after the same casting and drawing process without baking. Subsequently, the mechanical properties of the two samples were tested at room temperature. The test results are shown in Table 2.

[0030] Table 2

[0031]

[0032] Comparing the mechanical properties between the two, it can be seen that the yield strength and elon...

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Abstract

The invention discloses a method for preparing high-strength and high-toughness magnesium alloy wires by means of roasting. Alloys include one or more of calcium, zinc, tin and bismuth and include yttrium and the balance magnesium, the atomic percentage of one or more of calcium, zinc, tin and bismuth ranges from 0.3% to 1.5%, and the atomic percentage of yttrium ranges from 0.03% to 0.3%. Cylindrical magnesium alloy ingot blanks with the diameters ranging from 3 mm to 6 mm are prepared with the semi-continuous casting method, repeated drawing is performed after solid solution treatment, the working rate per pass does not exceed 15%, intermediate annealing and water quenching are performed after each pass of drawing, wires are subjected to roasting and water quenching at 100-220 DEG C for10-120 min finally, and the wires are obtained. Compared with magnesium alloys which are not subjected to roasting treatment, the magnesium alloy subjected to roasting treatment under equivalent service conditions has the advantages that the yield strength, the yield ratio and the toughness are synchronously and remarkably improved. The method is simple in equipment requirement, low in cost, highin efficiency, wide in application range and capable of stably improving the comprehensive mechanical performance of the magnesium alloy wires.

Description

technical field [0001] The invention relates to a method for preparing a high-strength and toughness magnesium alloy wire by baking, in particular to a method of baking a precipitated phase precursor to form a pin on the subgrain boundary, thereby preparing a magnesium alloy wire with high strength and high yield ratio. And high toughness magnesium alloy wire. It belongs to the technical field of non-ferrous metal material processing. Background technique [0002] Due to the characteristics of low density, high specific strength, excellent electromagnetic shielding and abundant resources, magnesium alloy wire has broad application prospects in the automotive, aerospace and transportation industries, and is an ideal lightweight structural material. However, in engineering applications, it is still difficult for magnesium alloy wire to meet the requirements of strength and toughness at the same time. The poor comprehensive mechanical properties seriously limit its scope of ap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06C22C23/00C22C23/04C22C23/06
CPCC22C23/00C22C23/04C22C23/06C22F1/002C22F1/06
Inventor 霍庆欢张至柔杨续跃
Owner 天津市金镁轮科技有限公司
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