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Non-heat treatment self-reinforcing aluminium-silicon alloy and preparation technology thereof

An aluminum-silicon alloy and its preparation technology are applied in the field of non-heat-treated self-strengthening aluminum-silicon alloy and its preparation technology, which can solve the problems of high cost consumption, poor mechanical properties and cutting performance, and achieve improved yield strength and excellent tensile strength. Effect of strength and yield strength, apparent heat resistance

Active Publication Date: 2015-08-12
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 domestic and foreign markets, but ordinary aluminum alloys cannot meet the needs of the modern automotive and aerospace industries. For example, aluminum-silicon 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-silicon alloy, comprising the following process steps:

[0023] (1) Preheat pure magnesium ingots, intermediate alloys AL-Si, AL-Mn, AL-Cu, AL-Ti to 180-240°C, heat the pure aluminum in the range of 740-760°C after melting, and turn the pure magnesium Ingots, master alloys AL—Si, AL—Mn, AL—Cu, AL—Ti are added to the molten aluminum, and after they are melted, they are kept at 740°C for 30 minutes to make them fully homogenized;

[0024] Among them, the components in the above materials are Si: 8.5-11.5, Mn: 0.1-0.8, Cu: 0.5-3.0, Mg: 0.25-0.5, Ti: 0.15-0.35, and other impurities ≤ 0.4 (where Fe<0.8 , P<0.004);

[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 war...

Embodiment 2

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

[0031] (1) Preheat pure magnesium ingots, intermediate alloys AL-Si, AL-Mn, AL-Cu, AL-Ti to 180-240°C, heat the pure aluminum in the range of 740-760°C after melting, and turn the pure magnesium Ingots, master alloys AL—Si, AL—Mn, AL—Cu, AL—Ti are added to the molten aluminum, and after they are melted, they are kept at 740°C for 30 minutes to make them fully homogenized;

[0032] Among them, the components in the above materials are Si: 8.5-11.5, Mn: 0.1-0.8, Cu: 0.5-3.0, Mg: 0.25-0.5, Ti: 0.15-0.35, and other impurities ≤ 0.4 (where Fe<0.8 , P<0.004);

[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 war...

Embodiment 3

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

[0039] (1) Preheat pure magnesium ingots, intermediate alloys AL-Si, AL-Mn, AL-Cu, AL-Ti to 180-240°C, heat the pure aluminum in the range of 740-760°C after melting, and turn the pure magnesium Ingots, master alloys AL—Si, AL—Mn, AL—Cu, AL—Ti are added to the molten aluminum, and after they are melted, they are kept at 740°C for 30 minutes to make them fully homogenized;

[0040] Among them, the components in the above materials are Si: 8.5-11.5, Mn: 0.1-0.8, Cu: 0.5-3.0, Mg: 0.25-0.5, Ti: 0.15-0.35, and other impurities ≤ 0.4 (where Fe<0.8 , P<0.004);

[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...

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Abstract

The invention discloses a non-heat treatment self-reinforcing aluminium-silicon alloy preparation technology, which comprises the following steps: adding pure magnesium ingot, intermediate alloys AL-Si, AL-Mn, AL-Cu, and AL-Ti in a fusing aluminium liquid at temperature of 740-760 DEG C, after fusing, insulating for 30 minutes at 740 DEG C; heating the temperature of an alloy liquid to 780 DEG C, adding mixing rare earth, removing the scummings on the surface after fusing the mixing rare earth, stirring for 3-6 minutes and increasing the temperature of the alloy liquid to 770-780 DEG C, insulating and standing for 30 minutes; finally cooling the alloy liquid to 750 DEG C for refining, refining for 15 minutes, removing the slag, degassing, and finally completing the casting production. According to the invention, the mixing rare earth and an element Mn are used for refining Si and Cu in an aluminium alloy material according to strict mol fraction ratio, reinforcement effect can be provided, and the aluminium-silicon alloy having advantages of high heat resistance, high elongation percentage and excellent deformation capability can be 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-silicon 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 domestic and foreign markets, but ordinary aluminum alloys cannot meet the needs of the modern automotive and aerospace industries. For example, aluminum-silicon materials currently on the market have disadvantages such as poor mechanical properties and cutting performa...

Claims

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Application Information

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IPC IPC(8): C22C21/02
CPCC22C21/02
Inventor 张鹏丁文江刘保良丁之光
Owner FENGYANG L S NET FORMING CO LTD
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