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High-performance wrought magnesium alloy which can be extruded quickly and preparation method thereof

A wrought magnesium alloy and high-performance technology, applied in the field of high-performance wrought magnesium alloy and its preparation, can solve the problems of difficulty in simultaneously improving extrusion speed and mechanical properties, and achieve excellent mechanical properties, expand application scope, and excellent mechanical properties. Effect

Inactive Publication Date: 2018-09-28
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that it is difficult to simultaneously improve the extrusion speed and mechanical properties of commercial magnesium alloys such as Mg-Al and Mg-Zn in the prior art, the present invention provides a fast-extruding high-performance wrought magnesium alloy and a preparation method thereof

Method used

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  • High-performance wrought magnesium alloy which can be extruded quickly and preparation method thereof
  • High-performance wrought magnesium alloy which can be extruded quickly and preparation method thereof
  • High-performance wrought magnesium alloy which can be extruded quickly and preparation method thereof

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preparation example Construction

[0043] In yet another specific embodiment of the present invention, a method for preparing the above-mentioned rapidly extrudable high-performance wrought magnesium alloy is provided, the method comprising:

[0044] S1. Alloy smelting and casting: After melting all the pure Mg, add preheated pure Al, Mg-Ca, Mg-Nd, Mg-Y and Mg-Ce master alloys, dissolve and mix evenly, and cast into ingots;

[0045] S2. Homogenization of the alloy: the cast ingot is subjected to water quenching after heat preservation;

[0046] S3. Extrusion processing of the alloy: Peel the homogenized ingot, machine it to a suitable size, extrude it by hot extrusion process, and cool it to room temperature in air.

[0047] In yet another specific embodiment of the present invention, in the step S1, heat up to 700°C and keep warm to melt all the pure Mg, and then add pure Al, Mg-Ca, For Mg-Nd, Mg-Y and Mg-Ce master alloys, raise the temperature to 740°C and keep it warm for 20-30 minutes. After the alloying e...

Embodiment 1

[0054] The alloy composition (mass percentage) is: 2.5% of Al, 1.0% of Ca, 2.0% of Y, 0.3% of Ce, and the rest are magnesium and unavoidable impurities.

[0055] According to the composition ratio of above-mentioned embodiment, obtain magnesium alloy material of the present invention with following method:

[0056] (1) Alloy smelting and casting: firstly, the magnesium alloy melting furnace is heated to 400-500°C, and at the same time, the industrial pure Mg, industrial pure Al, Mg-Ca, Mg-Nd, Mg-Y and Mg-Ce master alloys are heated at 200 Preheat at ℃ for 30 minutes; 2 and SF 6 Add pure Mg into the resistance furnace protected by mixed gas, heat it up to 700°C and keep it warm to melt the pure Mg, then add the preheated pure Al, Mg-Ca, Mg-Nd, Mg-Y and Mg-Ce master alloys, Raise the temperature to 740°C and keep it warm for 20-30 minutes. After the alloying elements are completely melted, stir evenly. After standing for 20 minutes, cool down to 690°C. 2 and SF 6 Cast into i...

Embodiment 2

[0060] The alloy composition (mass percentage) is: Al 1.5%, Ca 2.0%, Nd 2.0%, Ce 0.6%, and the rest are magnesium and unavoidable impurities.

[0061] According to the composition ratio of above-mentioned embodiment, obtain magnesium alloy material of the present invention with following method:

[0062] (1) Alloy smelting and casting: firstly, the magnesium alloy melting furnace is heated to 400-500°C, and at the same time, the industrial pure Mg, industrial pure Al, Mg-Ca, Mg-Nd, Mg-Y and Mg-Ce master alloys are heated at 200 Preheat at ℃ for 30 minutes; 2 and SF 6 Add pure Mg into the resistance furnace protected by mixed gas, heat it up to 700°C and keep it warm to melt the pure Mg, then add the preheated pure Al, Mg-Ca, Mg-Nd, Mg-Y and Mg-Ce master alloys, Raise the temperature to 740°C and keep it warm for 20-30 minutes. After the alloying elements are completely melted, stir evenly. After standing for 20 minutes, cool down to 695°C. 2 and SF 6 Cast into ingots under...

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Abstract

The invention provides a high-performance wrought magnesium alloy which can be extruded quickly and a preparation method thereof. The high-performance wrought magnesium alloy is prepared from, by mass, 1.0-3.0% of Al, 0.5-2.0% of Ca, 0.5-3.0% of Nd and / or Y, 0.1-1.0% of Ce and the balance magnesium and unavoidable impurities. Industrial pure Mg, industrial pure Al and middle alloys Mg-Ca, Mg-Nd, Mg-Y and Mg-Ce are adopted as raw materials and smelted to obtain an ingot casting; then, uniform thermal treatment, mechanical machining and plastic-deformation thermal machining are carried out to obtain a magnesium alloy material. The magnesium alloy material can be subjected to high-speed extrusion at the speed not lower than 15m / min. Moreover, the obtained material is excellent in mechanical performance, the yield strength and the tensile strength can reach 260 MPa and 290 MPa or above respectively, the specific elongation reaches 16% or above, and the application range of the magnesium alloy is further expanded.

Description

technical field [0001] The invention relates to the technical field of magnesium alloy preparation, in particular to a high-performance deformed magnesium alloy with an extrusion speed not lower than 15m / min and a preparation method thereof. Background technique [0002] Compared with cast magnesium alloys, deformed magnesium alloys can produce seamless pipes, plates and profiled materials with complex cross-sections through deformation, so as to meet the needs of more structural parts; and magnesium alloys can undergo dynamic recrystallization during thermal deformation Uniform and fine grains are obtained, and better mechanical properties such as higher strength and better ductility than the cast state are obtained. However, the processing window of generally wrought magnesium alloys is narrower than that of aluminum alloys, and it is difficult to achieve rapid extrusion, which directly affects production efficiency and cost. [0003] At present, the widely used wrought m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C23/06C22C23/00C22C1/03C22F1/06
CPCC22C1/03C22C23/00C22C23/02C22C23/06C22F1/002C22F1/06
Inventor 赵东清周吉学刘玉马百常王金伟宋晓村李卫红杨院生
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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