Non-heat-treated self-strengthening aluminum-silicon alloy and its preparation process

An aluminum-silicon alloy, non-heat-treatment technology, applied in the field of non-heat-treatment self-strengthening aluminum-silicon alloy and its preparation process, can solve the problems of high cost consumption, poor mechanical properties and machining performance, etc., and achieve improved yield strength and excellent tensile strength. Strength and yield strength, effects of increased elongation and fatigue properties of materials

Active Publication Date: 2017-03-15
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

A preparation process of a non-heat-treated self-strengthening aluminum-silicon alloy comprises the following process steps: firstly adding a pure magnesium ingot and intermediate alloys AL-Si, AL-Mn, AL-Cu and AL-Ti into an aluminum solution having a temperature of 740-760ºC, fusing the above materials, and retaining the alloy solution for 30 minutes at 740ºC; heating the alloy solution to 780ºC, adding mixed rare earths into the alloy solution, removing surface scum after the fusion of the mixed rare earths, stirring the solution for 3-6 minutes, heating the alloy solution to 770-780ºC, and keeping the temperature and allowing the alloy solution to rest for 30 minutes; and cooling the alloy solution to 750ºC, refining for 15 minutes, removing slag and degassing, and finally completing a casting production.

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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Patent Type & Authority Patents(China)
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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