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High-strength high-toughness die-casting aluminum alloy and preparation method thereof

A technology of casting aluminum alloy and high toughness, which is applied in the field of metal materials and can solve problems such as poor casting performance and difficulty in die-casting

Inactive Publication Date: 2017-01-11
苏州慧驰轻合金精密成型科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One purpose of the present invention is to solve the technical problems of poor casting performance and difficult die-casting of current Al-Mg alloys and provide a high-strength and high-toughness die-casting aluminum alloy, Al-Mg-Si-Mn-Cu-Ti aluminum alloy, which Alloys can be used in parts with complex shapes and high strength requirements in the automotive and communication industries. Compared with conventional aluminum alloys, they have the advantages of high toughness and good casting fluidity, and have good application prospects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0028] Taking 25kg as an example, according to the ratio of Al-4.2Mg-1.8Si-0.15Mn-0.13Cu-0.05Ti as an example, calculate the quality of the master alloy and prepare the material.

[0029] 1) Prepare raw materials and clean the furnace. The furnace needs to be cleaned to avoid residual alloys affecting the performance of the alloy. Now prepare materials according to the alloy composition ratio, alloy elements can be added in pure alloy and intermediate form, Cu element is added in Al-Cu intermediate alloy, Si element is added in simple substance or Al-Si intermediate alloy, Mg element is added in pure Mg or Al-Mg The master alloy is added, the Mn element is added in the Al-Mn master alloy, and the Ti element is added in the Al-Ti master alloy.

[0030] 2) After the surface of the aluminum ingot is cleaned, put the pure aluminum ingot into the crucible of the pit furnace, heat the crucible for melting, and control the temperature of the molten aluminum between 690-710°C.

[003...

Embodiment example 2

[0038] Taking 25kg as an example, according to the ratio of Al-4.8Mg-1.5Si-0.14Mn-0.12Cu-0.05Ti as an example, calculate the quality of the master alloy and prepare the material.

[0039] 1) Prepare raw materials and clean the furnace. The furnace needs to be cleaned to avoid residual alloys affecting the performance of the alloy. Now prepare materials according to the alloy composition ratio, alloy elements can be added in pure alloy and intermediate form, Cu element is added in Al-Cu intermediate alloy, Si element is added in simple substance or Al-Si intermediate alloy, Mg element is added in pure Mg or Al-Mg The master alloy is added, the Mn element is added in the Al-Mn master alloy, and the Ti element is added in the Al-Ti master alloy.

[0040] 2) After the surface of the aluminum ingot is cleaned, put the pure aluminum ingot into the crucible of the pit furnace, heat the crucible for melting, and control the temperature of the molten aluminum between 690-710°C.

[004...

Embodiment example 3

[0048] Taking 25kg as an example, according to the ratio of Al-5.3Mg-1.8Si-0.22Mn-0.25Cu-0.08Ti as an example, calculate the quality of the master alloy and prepare the material.

[0049] 1) Prepare raw materials and clean the furnace. The furnace needs to be cleaned to avoid residual alloys affecting the performance of the alloy. Now prepare materials according to the alloy composition ratio, alloy elements can be added in pure alloy and intermediate form, Cu element is added in Al-Cu intermediate alloy, Si element is added in simple substance or Al-Si intermediate alloy, Mg element is added in pure Mg or Al-Mg The master alloy is added, the Mn element is added in the Al-Mn master alloy, and the Ti element is added in the Al-Ti master alloy.

[0050] 2) After the surface of the aluminum ingot is cleaned, put the pure aluminum ingot into the crucible of the pit furnace, heat the crucible for melting, and control the temperature of the molten aluminum between 690-710°C.

[005...

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Abstract

The invention belongs to the field of metal materials, and particularly relates to a high-strength high-toughness die-casting aluminum alloy and a preparation method thereof. The high-strength high-toughness die-casting aluminum alloy comprises the following components: 4.2-5.3wt% of Mg, 1.5-1.8wt% of Si, 0.14-0.22wt% of Mn, 0.12-0.25wt% of Cu, 0.05-0.08wt% of Ti and the balance of aluminum and other impurity elements, wherein the content of the impurity elements is less than 0.005%. According to the invention, the problems of the existing Al-Mg series alloy such as poor casting performance and low die-casting molding possibility are well solved. After the developed high-strength high-toughness die-casting aluminum alloy is naturally aged at 20 DEG C, the yield strength of a casting is 180-200 MPa, the tensile strength is 340-350 MPa, and the elongation percentage is 10-15%. The alloy can be used for spare parts having complicated shapes and high strength requirements in the automobile and communication industries; and compared with the conventional Al-Si and Al-Cu series alloys, the alloy provided by the invention has remarkable advantages in the aspect of toughness.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to a high-strength and high-toughness die-casting aluminum alloy and a preparation method thereof. Background technique [0002] As a liquid precise forming method, die casting has the advantages of high production efficiency, excellent economic indicators, high dimensional accuracy and good interchangeability of castings, and has been widely used and developed rapidly in the manufacturing industry. Aluminum alloy is the most widely used of all die-casting alloys, but its application range is greatly limited due to its unsatisfactory strength and toughness, especially not suitable for structural stress and collision parts such as automobiles and motorcycles. The applicant of the present invention has previously applied for CN 105112748A, which discloses a high-strength cast aluminum alloy and its preparation method. Compared with alloys, it has obvious advantages in stren...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C1/03C22C1/06C22F1/047
CPCC22C21/08C22C1/026C22C1/03C22C1/06C22F1/047
Inventor 汪时宜周银鹏李德江罗云斌赵华曾小勤
Owner 苏州慧驰轻合金精密成型科技有限公司
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