Low-cost high-speed-extruded magnesium alloy material and preparation process thereof

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

Active Publication Date: 2017-05-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • 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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  • Low-cost high-speed-extruded magnesium alloy material and preparation process thereof
  • Low-cost high-speed-extruded magnesium alloy material and preparation process thereof
  • Low-cost high-speed-extruded magnesium alloy material and preparation process thereof

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Experimental program
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Effect test

Embodiment 1

[0032] 1) Metal mold gravity casting is adopted, Mg-Zn-Ca-Mn is smelted and poured into an ingot of 80mm×180mm×200mm through conventional magnesium alloy melting, and the weight percentage of the alloy composition is Zn: 0.21%, Ca: 0.30%, Mn: 0.14 %, the magnesium content is the balance balance;

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

[0034] 3) Heat the extrusion die to the extrusion deformation temperature of 400°C, then put the extrusion billet into the extrusion barrel and heat it for 8 minutes. After the extrusion billet reaches the deformation temperature of 400°C, it will be processed into a bar at high 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 a weak non-basal texture, and the non-basal texture component...

Embodiment 2

[0037] 1) Metal mold gravity casting is adopted, Mg-Zn-Ca-Mn is smelted and poured into an ingot of 80mm×180mm×200mm through conventional magnesium alloy melting, and the weight percentage of the alloy composition is Zn: 0.43%, Ca: 0.14%, Mn: 0.28 %, the magnesium content is the balance balance;

[0038] 2) Homogenize the ingot at 380°C for 6 hours, then raise the temperature to 440°C for 4 hours, and then cut the homogenized ingot into corresponding extrusion billets;

[0039] 3) First heat the extrusion die to the extrusion deformation temperature of 300°C, then put the extrusion billet into the extrusion barrel and heat for 5 minutes, after the extrusion billet reaches the deformation temperature of 300°C, it is processed 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 weak non-b...

Embodiment 3

[0042] 1) Metal mold gravity casting is adopted, Mg-Zn-Ca-Mn is melted and poured into an ingot of 80mm×180mm×200mm by conventional magnesium alloy, and the weight percentage of the alloy composition is Zn: 0.53%, Ca: 0.24%, Mn: 0.27 %, the magnesium content is the balance balance;

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

[0044] 3) First heat the extrusion die to the extrusion deformation temperature of 300°C, then put the extrusion billet into the extrusion barrel and heat for 5 minutes, after the extrusion billet reaches the deformation temperature of 300°C, it is processed 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 a weak non-basal texture, and the non...

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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 extruded 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 stiffness, excellent thermal conductivity and electrical conductivity, good electromagnetic shielding performance, and recyclability. It is known as "green structural material in the 21st century". In recent years, the rapid development of the automobile industry and the enhancement of people's awareness of energy saving, safety and environmental protection of automobiles have made magnesium alloys more and more concerned in the fields of transportation such as automobiles. However, due to the close-packed hexagonal crystal structure of magnesium alloy, its plastic processing performance is poor, which limits its large-scale ...

Claims

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Application Information

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Patent Type & Authority Applications(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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