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Solid treatment method for improving strength performance of Mg-Zn-Y alloy

A treatment method and alloy strength technology, which is applied in the field of solid-state treatment to improve the strength performance of Mg-Zn-Y alloys, can solve the problems of low alloy performance, unfavorable LPSO strengthening effect, weakening the mechanical properties of magnesium alloys, etc., and achieve uniform distribution and high strength. The effect of performance improvement and alloy phase size refinement

Inactive Publication Date: 2014-05-07
东莞市镁皓镁合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relatively speaking, the ordinary casting method is the easiest and cheapest method to implement, but the alloy phase in the Mg97Zn Y2 alloy prepared by this method is coarse, And it is distributed along the grain boundary in a network shape, which is not conducive to the strengthening effect of the LPSO phase, but will weaken the mechanical properties of the magnesium alloy, making Mg97ZnY2 prepared by ordinary casting method sub>Alloy performance is very low

Method used

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  • Solid treatment method for improving strength performance of Mg-Zn-Y alloy
  • Solid treatment method for improving strength performance of Mg-Zn-Y alloy
  • Solid treatment method for improving strength performance of Mg-Zn-Y alloy

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Embodiment 1

[0040] This embodiment adopts a solid-state treatment process including ingot chip making, chip cold pressing, hot pressing consolidation and extrusion molding. The specific treatment process is: the Mg 97 ZnY 2 The alloy ingot was cut on a common lathe to prepare chips. The cutting parameters were: tool rake angle 45°, chip speed 50 r / min, chip thickness 0.5 mm; And hold the pressure for 2 minutes; heat the mold and the sample to 400°C and keep it warm, and apply a pressure of 800MPa and keep it for 20 minutes to achieve viscoplastic bonding and diffusion bonding of the alloy. Finally, the sample is extruded to obtain a cylindrical bar, wherein the extrusion ratio is 10:1, the extrusion temperature is 400°C, and the extrusion pressure is 800MPa. The optical microstructure of the rod-shaped material after extrusion is as follows: Figure 6 , XRD picture as Figure 7 , the compression experiment curve is shown in Figure 8 , the tensile test curve is shown in Figure 9 . ...

Embodiment 2

[0043] The process flow of this embodiment is the same as that of Embodiment 1, the difference being that the parameters of each process are different.

[0044] This embodiment adopts including The solid-state treatment process of ingot chip making, chip cold pressing, hot pressing consolidation and extrusion molding. The specific treatment process is: the Mg 97 ZnY 2 The alloy ingot was cut on a common lathe to prepare chips. The cutting parameters were: tool rake angle 45°, chip speed 50 r / min, chip thickness 0.5mm; then put it into a mold for compaction at room temperature with a pressure of 800MPa. And hold the pressure for 3 minutes; heat the mold and the sample to 350°C and keep it warm, and apply a pressure of 400MPa and keep it for 30 minutes to achieve viscoplastic bonding and diffusion bonding of the alloy. Finally, the sample is extruded to obtain a cylindrical bar, wherein the extrusion ratio is 10:1, the extrusion temperature is 400°C, and the extrusion pres...

Embodiment 3

[0047] This embodiment adopts including The solid-state treatment process of ingot chip making, chip cold pressing, hot pressing consolidation and extrusion molding. The specific treatment process is: the Mg 97 ZnY 2 The alloy ingot was cut on a common lathe to prepare chips. The cutting parameters were: tool rake angle 45°, chip speed 50 r / min, chip thickness 0.5 mm; And hold the pressure for 5 minutes; heat the mold and the sample to 450°C and keep it warm, and apply a pressure of 800MPa and keep it for 20 minutes to achieve viscoplastic bonding and diffusion bonding of the alloy. Finally, the sample is extruded to obtain a cylindrical bar, wherein the extrusion ratio is 10:1, the extrusion temperature is 400°C, and the extrusion pressure is 800MPa. In the above process, the chips are cold-pressed and compacted, hot-pressed and consolidated and extruded in the same mold, as shown in Figure 1. Install the base and gasket, put the gasket into the mold, put 45g of magnesiu...

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Abstract

The invention discloses a solid treatment method for improving the strength performance of an Mg-Zn-Y alloy. The method comprises shred preparation of Mg97ZnY2 alloy blank ingots, chipped shred cold pressing, hot pressing consolidating, and extrusion molding. Compared with casting state alloys, an Mg97ZnY2 alloy prepared through the method disclosed in the invention has the advantages of obviously refined structure and substantially improved strength performance, wherein the compressive strength of the Mg97ZnY2 alloy is improved to 487-534MPa from 346MPa, so the increase rate is about 40-50%; the tensile strength is improved to 321-397MPa from 157MPa, so the increase rate is about 104-152%; and the tensile strain at break is improved to 12.7-17.4% from 10.3%, so the increase rate is about 23-71%.

Description

technical field [0001] The invention relates to a solid-state treatment method for improving the strength performance of Mg-Zn-Y alloys, involving Mg 97 ZnY 2 (Atomic ratio) alloy is solidified by cuttings and then extruded to improve its strength performance, specifically adding Mg 97 ZnY 2 The ingot is cut and chipped, then compacted by cold pressing, consolidated by hot pressing, and then extruded to prepare alloy bars, thereby significantly improving the strength properties of the alloy. Background technique [0002] Magnesium alloy is the lightest metal structural material, which has the advantages of light specific gravity, high specific strength, good vibration damping, strong electromagnetic shielding, and easy recycling. It is considered to be the "green project" with the most development and application potential in the 21st century. "Material. However, compared with iron and steel materials, the mechanical properties of magnesium alloy materials are still low,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22F1/06
Inventor 杜军吕信裕李文芳
Owner 东莞市镁皓镁合金科技有限公司
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