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High-strength cast aluminum and preparing method thereof

A casting aluminum alloy, high-strength technology, applied in the field of metal materials, can solve problems such as low strength, poor fluidity, thermal cracking, etc., and achieve the effect of strength advantages

Inactive Publication Date: 2015-12-02
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

[0004] There are currently several series of high-strength aluminum alloys, mainly AL-Cu series, 5-series and 7-series aluminum alloys, but the conventional aluminum alloys of 5-series and 7-series have poor fluidity and tend to crack, so they can only be used Due to the simple structural parts, complex structural parts cannot be filled completely
The present invention is mainly based on the existing series of cast aluminum alloys, and improves the shortcomings of the current cast aluminum alloys such as low strength, poor fluidity and tendency to hot cracking through multiple alloy optimization.

Method used

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  • High-strength cast aluminum and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment

[0029] Taking 25kg as an example, according to the ratio of AL-1.5Cu-0.1Si-0.5Mg-0.05Mn-0.02Zr-0.1Ti as an example, calculate the quality of the master alloy and prepare the material.

[0030] 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 can be added in Al-Cu alloy, Si element can be added in simple substance or Al-Si intermediate alloy form, Mg element can be added in pure Mg or Al-Mg The alloy is added, the Mn element is added in the form of Al-Mn alloy; the Zr element is added in the form of Al-Zr alloy; the Ti element is added in the form of Al-Ti alloy.

[0031] 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 smelting, and control the temperature of...

specific Embodiment example 2

[0037] Taking 25kg as an example, according to the ratio of AL-2.5Cu-0.5Si-07Mg-0.1Mn-0.1Zr-0.15Ti as an example, calculate the quality of the master alloy and prepare the material.

[0038] 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 can be added in Al-Cu alloy, Si element can be added in simple substance or Al-Si intermediate alloy form, Mg element can be added in pure Mg or Al-Mg The alloy is added, the Mn element is added in the form of Al-Mn alloy; the Zr element is added in the form of Al-Zr alloy; the Ti element is added in the form of Al-Ti alloy.

[0039] 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 smelting, and control the temperature of the...

specific Embodiment example 3

[0045] Taking 25kg as an example, according to the ratio of AL-3Cu-0.8Si-1Mg-0.15Mn-0.15Zr-0.25Ti as an example, calculate the quality of the master alloy and prepare the material.

[0046] 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 can be added in Al-Cu alloy, Si element can be added in simple substance or Al-Si intermediate alloy form, Mg element can be added in pure Mg or Al-Mg The alloy is added, the Mn element is added in the form of Al-Mn alloy; the Zr element is added in the form of Al-Zr alloy; the Ti element is added in the form of Al-Ti alloy.

[0047] 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 smelting, and control the temperature of th...

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Abstract

The invention discloses high-strength cast aluminum alloy. The high-strength cast aluminum alloy comprises, by weight, 1%-3% of Cu, 0.1%-1% of Si, 0.15%-1.5% of Mg, 0.05%-0.2% of Mn, 0.02%-0.2% of Zr, 0.1%-0.3% of Ti and the balance aluminum and other impurity elements. The content of the other impurity elements is smaller than 0.005%. After pure aluminum is molten, corresponding intermediate alloy is added according to the composition proportion, refining is conducted at the temperature of 740 DEG C by means of a specialized refining agent, the temperature is decreased to 730 DEG C after stirring is sufficiently conducted, and standing is conducted for 10 min. An Al-Ti-B modificator is used for modification. The high-strength cast aluminum alloy is adapted to the gravity casting process at the temperature of 20 DEG C; at the temperature of 20 DEG C, the tensile strength of a casting made of the high-strength aluminum alloy ranges from 320 Pa to 370 Pa, the yield strength of the casting ranges from 200 MPa to 260 MPa, the ductility ranges is 2%-6%, and the high-strength cast aluminum alloy can be applied to structural components, having requirements for material performance, in the industries such as the automobile industry and the communication industry. Compared with conventional copper alloy, the high-strength cast aluminum alloy has remarkable advantages on the aspect of strength.

Description

technical field [0001] The invention relates to a high-strength cast aluminum alloy, which has properties close to that of forged aluminum alloy after heat treatment, is suitable for gravity pouring, and belongs to the field of metal materials. Background technique [0002] With the development of lightweight in the automotive and communication industries, new materials and new processes for automotive lightweight will be the future demand. Lightweight new materials are the main means of lightweighting, and safety is the premise of lightweighting. When people optimize the design of traditional structures, they will carry out optimized designs, and some thicknesses will become thinner. This requires relatively high material strength. It is necessary to develop high-strength light alloys to meet the needs of future lightweight materials. It is very necessary to develop a high-strength cast aluminum alloy for the lightweight development of the automobile and communication indu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/16
Inventor 周银鹏汪时宜赵华罗云斌谌晓勇曾小勤
Owner 苏州慧驰轻合金精密成型科技有限公司
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