Non-heat-treated self-strengthening aluminum and magnesium alloy and preparation technology thereof

An aluminum-magnesium alloy and a preparation process technology, applied in the field of non-heat-treated self-strengthening aluminum-magnesium alloy and its preparation process, can solve the problems of high cost consumption, poor mechanical properties and machining performance, etc., and achieve low cost and excellent tensile strength. and yield strength, the effect of high heat resistance

Active Publication Date: 2015-07-29
FENGYANG L S NET FORMING CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, aluminum alloys have been widely used in automotive materials in the domestic and foreign markets, but ordinary aluminum alloys cannot meet the needs of the modern automotive and aerospace industries. For example, aluminum-magnesium materials currently on the market have disadvantages such as poor mechanical properties and cutting performance , and the vast majority of aluminum alloys are prepared by heat treatment, which consumes a lot of cost, which puts forward higher requirements for alloy materials and their preparation processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A preparation process of non-heat treatment self-strengthening aluminum-magnesium alloy, comprising the following process steps:

[0023] (1) Preheat pure magnesium ingots, intermediate alloys AL-Si, AL-Mn to 180-240°C, heat up to 680°C after melting pure aluminum, add pure magnesium ingots and keep warm for 20 minutes after melting, then heat the alloy liquid To 740-760°C, add the intermediate alloys AL-Si and AL-Mn into the alloy liquid in turn, and after they melt, keep warm at 740°C for 30 minutes to make them fully homogenized;

[0024] The components in the above materials are Mg: 4.5-6.5, Si<0.1, Mn: 0.4-0.8, and other impurities ≤ 0.4 (where Fe<0.5) by weight percentage;

[0025] (2) Raise the temperature of the alloy liquid to 780°C, add mixed rare earths, remove the scum on the surface after the mixed rare earths are melted, stir for 3-6 minutes to homogenize the ingredients, raise the temperature of the alloy liquid to 770-780°C after stirring, and keep warm ...

Embodiment 2

[0030] A preparation process of non-heat treatment self-strengthening aluminum-magnesium alloy, comprising the following process steps:

[0031] (1) Preheat pure magnesium ingots, intermediate alloys AL-Si, AL-Mn to 180-240°C, heat up to 680°C after melting pure aluminum, add pure magnesium ingots and keep warm for 20 minutes after melting, then heat the alloy liquid To 740-760°C, add the intermediate alloys AL-Si and AL-Mn into the alloy liquid in turn, and after they melt, keep warm at 740°C for 30 minutes to make them fully homogenized;

[0032] The components in the above materials are Mg: 4.5-6.5, Si<0.1, Mn: 0.4-0.8, and other impurities ≤ 0.4 (where Fe<0.5) by weight percentage;

[0033] (2) Raise the temperature of the alloy liquid to 780°C, add mixed rare earths, remove the scum on the surface after the mixed rare earths are melted, stir for 3-6 minutes to homogenize the ingredients, raise the temperature of the alloy liquid to 770-780°C after stirring, and keep warm ...

Embodiment 3

[0038] A preparation process of non-heat treatment self-strengthening aluminum-magnesium alloy, comprising the following process steps:

[0039] (1) Preheat pure magnesium ingots, intermediate alloys AL-Si, AL-Mn to 180-240°C, heat up to 680°C after melting pure aluminum, add pure magnesium ingots and keep warm for 20 minutes after melting, then heat the alloy liquid To 740-760°C, add the intermediate alloys AL-Si and AL-Mn into the alloy liquid in turn, and after they melt, keep warm at 740°C for 30 minutes to make them fully homogenized;

[0040] The components in the above materials are Mg: 4.5-6.5, Si<0.1, Mn: 0.4-0.8, and other impurities ≤ 0.4 (where Fe<0.5) by weight percentage;

[0041] (2) Raise the temperature of the alloy liquid to 780°C, add mixed rare earths, remove the scum on the surface after the mixed rare earths are melted, stir for 3-6 minutes to homogenize the ingredients, raise the temperature of the alloy liquid to 770-780°C after stirring, and keep warm L...

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Abstract

The invention discloses a non-heat-treated self-strengthening aluminum and magnesium alloy and a preparation technology thereof. The preparation technology comprises technological steps as follows: firstly, melting pure aluminum, heating the pure aluminum to the temperature of 680 DEG C, adding pure magnesium ingots, performing heat preservation after the pure magnesium ingots are molten, adding intermediate alloys AL-Si and AL-Mn into an alloy liquid heated to the temperature of 740-760 DEG C, and performing heat preservation at the temperature of 740 DEG C after the alloys are molten; secondly, heating the alloy liquid to the temperature of 780 DEG C, adding misch metal, removing surface scums after the misch metal is molten, stirring the alloy liquid, heating the alloy liquid to the temperature of 770-780 DEG C, performing the heat preservation and leaving the alloy liquid to stand for 30 min; finally, cooling the alloy liquid to the temperature of 750 DEG C for refining, removing slag and gas after refining is performed for 15 min, and finishing casting production. According to the non-heat-treated self-strengthening aluminum and magnesium alloy and the preparation technology thereof, the misch metal and the elements including Mn and Mg in a strict mole fraction ratio are adopted for refining dendritic crystal composition of Mn and Mg in the aluminum alloy material, and one aluminum and magnesium alloy with high heat resistance, high elongation percentage and excellent deformability is obtained.

Description

technical field [0001] The invention relates to the field of alloy material preparation, in particular to a non-heat treatment self-strengthening aluminum-magnesium alloy and a preparation process thereof. Background technique [0002] In recent years, with the acceleration of the lightweight of automobiles and aerospace, the performance requirements of alloy materials have become more stringent. For example, high yield strength is required in the design of automobile parts and aerospace parts, and high elongation and excellent toughness are required during deformation. Impact toughness and good wear resistance and fatigue performance. At present, aluminum alloys have been widely used in automotive materials in the domestic and foreign markets, but ordinary aluminum alloys cannot meet the needs of the modern automotive and aerospace industries. For example, aluminum-magnesium materials currently on the market have disadvantages such as poor mechanical properties and cutting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C23/00C22F1/06
Inventor 张鹏丁文江刘保良丁之光
Owner FENGYANG L S NET FORMING CO LTD
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