A low-cost high-speed extrusion magnesium alloy material and its preparation process

A preparation process, magnesium alloy technology, applied in the field of metal materials, can solve the problems of high cost, weak non-base surface texture, low extrusion speed of extrusion materials, etc., achieve low cost, improve room temperature plasticity, and extrusion production efficiency high effect

Active Publication Date: 2019-02-15
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the problems of low extrusion speed and high cost of current commercial magnesium alloys, such as Mg-Al-Zn series and Mg-Zn-Zr series extrusion materials, the purpose of the present invention is to provide a low-cost high-speed extrusion magnesium alloy material and its preparation process, the magnesium alloy material does not contain rare earth elements and other precious metal elements, the magnesium alloy extruded material is produced by an extrusion process with a speed of not less than 24m / min at the exit, the obtained extruded material has a smooth surface and no surface cracks, and at the same time The extruded material has a weak non-basal texture, and its maximum extreme density value is ≤4

Method used

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  • A low-cost high-speed extrusion magnesium alloy material and its preparation process
  • A low-cost high-speed extrusion magnesium alloy material and its preparation process
  • A low-cost high-speed extrusion magnesium alloy material and its preparation process

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Experimental program
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Effect test

Embodiment 1

[0032] 1) Using metal mold gravity casting, Mg-Zn-Ca-Mn is cast into an ingot of 80mm×180mm×200mm by conventional magnesium alloy smelting, the alloy composition weight percentage is Zn: 0.21%, Ca: 0.30%, Mn: 0.14 %, the magnesium content is the balance margin;

[0033] 2) Homogenize the ingot at 400°C for 10 hours, then heat it to 450°C for 10 hours, and then cut the homogenized ingot into corresponding extruded billets;

[0034] 3) Heat the extrusion die to an extrusion deformation temperature of 400°C, then put the extruded billet into the extrusion cylinder and heat it for 8 minutes. After the extrusion billet reaches the deformation temperature of 400°C, it is extruded into a bar at high speed, and the extrusion exit speed 60m / min, the extrusion ratio is 20;

[0035] 4) The surface of the extruded material is smooth without any surface cracks, see figure 1 ; The texture of the extruded material is weak non-basal surface texture, and the non-basal surface texture component is in...

Embodiment 2

[0037] 1) Using metal mold gravity casting, Mg-Zn-Ca-Mn is cast into an ingot of 80mm×180mm×200mm by conventional magnesium alloy smelting, the alloy composition weight percentage is Zn: 0.43%, Ca: 0.14%, Mn: 0.28 %, the magnesium content is the balance margin;

[0038] 2) Homogenizing the ingot at 380°C for 6 hours, then heating to 440°C for 4 hours, and then cutting the homogenized ingot into corresponding extruded billets;

[0039] 3) First heat the extrusion die to an extrusion deformation temperature of 300°C, then put the extruded billet into the extrusion cylinder and heat it for 5 minutes. After the extrusion billet reaches the deformation temperature of 300°C, it is extruded into a bar at high speed, and the extrusion exit The speed is 60m / min, and the extrusion ratio is 20;

[0040] 4) The surface of the extruded material is smooth without any surface cracks, see figure 1 ; The texture of the extruded material is a weak non-basal surface texture. The non-basal surface text...

Embodiment 3

[0042] 1) Using metal mold gravity casting, Mg-Zn-Ca-Mn is cast into an ingot of 80mm×180mm×200mm by conventional magnesium alloy smelting. The alloy composition weight percentage is Zn: 0.53%, Ca: 0.24%, Mn: 0.27 %, the magnesium content is the balance margin;

[0043] 2) Homogenize the ingot at 400°C for 12h, then heat it to 450°C for 12h, and then cut the homogenized ingot into corresponding extruded billets;

[0044] 3) First heat the extrusion die to an extrusion deformation temperature of 300°C, then put the extruded billet into the extrusion cylinder and heat it for 5 minutes. After the extrusion billet reaches the deformation temperature of 300°C, it is extruded into a bar at high speed, and the extrusion exit The speed is 24m / min, and the extrusion ratio is 20;

[0045] 4) The surface of the extruded material is smooth without any surface cracks, see figure 1 ; The texture of the extruded material is weak non-basal surface texture, and the non-basal surface texture componen...

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Abstract

The invention discloses a low-cost high-speed-extruded magnesium alloy material and a preparation process thereof and belongs to the technical field of metal materials. The extruded material comprises the following chemical components by weight percent: 0.1-0.9% of Zn, 0.1-0.5% of Ca, 0-0.5% of Mn and the balance Mg and inevitable impurities, wherein the total content of the alloy elements (Zn, Ca and Mn) does not exceed 1.5 wt%. Production is performed at the extrusion outlet speed of more than or equal to 24 m / min, the extrusion production efficiency is high, the cost of the extruded material is lowered, the extruded material is smooth in surface and has no surface cracks, and therefore, the yield of the extruded material is guaranteed; and meanwhile, the extruded material has a weak non-basal texture with the maximum density value of less than or equal to 4. The extruded material is low in content of alloy elements, does not contain rare earth elements or other noble metal elements, and therefore, is low in cost.

Description

Technical field [0001] The invention relates to the technical field of metal materials, in particular to a low-cost high-speed extrusion magnesium alloy material and a preparation process thereof. Background technique [0002] As the lightest metal structural material, magnesium alloy has a series of advantages such as high specific strength and specific rigidity, excellent thermal and electrical conductivity, good electromagnetic shielding performance, and recyclability. It is known as the "green structural material of the 21st century". In recent years, the rapid development of the automobile industry and people's awareness of automobile energy saving, safety and environmental protection have made magnesium alloys more and more concerned in the transportation fields such as automobiles. However, because the magnesium alloy has a hexagonal close-packed crystal structure, its plastic processing performance is poor, which limits its large-scale application. [0003] Extrusion defor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C23/00C22F1/06
CPCC22C23/00C22C23/04C22F1/06
Inventor 陈荣石姜明光闫宏侯丹辉马跃群柯伟
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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