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Heat-resistant die-casting aluminum alloy and preparation method thereof

A casting aluminum alloy and heat-resistant technology, which is applied in the field of aluminum alloys, can solve the problems of low-temperature mechanical properties of aluminum alloys, stress concentration, splitting the matrix, etc., and achieve the effects of improving thermal stability and reducing the degree of lattice distortion

Active Publication Date: 2019-03-15
苏州慧金新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, once the content of Fe in the aluminum matrix exceeds its solid solution limit, it will form fine needle-shaped and coarse flake iron-rich phases, severely split the matrix, cause stress concentration, and cause a sharp decrease in the high-temperature mechanical properties of aluminum alloys.

Method used

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  • Heat-resistant die-casting aluminum alloy and preparation method thereof

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Embodiment

[0025] A high-strength and high-thermal-conductivity thin-walled die-cast aluminum alloy, including the components described in the following Table 1 by weight percentage, with the balance being aluminum and unavoidable impurities.

[0026] Ce: 0.5wt%-3wt%; B <0.05wt%; Fe: 0.5wt%-3wt%; Sc <0.5wt%; Cu <0.5wt%, other unavoidable impurities are controlled below 0.05wt%, and the balance is Al and unavoidable impurities.

[0027] Table 1 shows the weight content of each element in the aluminum alloys of Examples 1-15

[0028] Example

Ce

B

Fe

Cu

Sc

1

0

0

0.6

0.2

0

2

0

0

1.50

0.15

0

3

0

0

2.61

0.25

0

4

1.04

0.03

1.72

0.31

0

5

1.22

0.01

1.73

0.34

0.15

6

1.65

0.04

1.77

0.43

0.21

7

1.18

0.02

1.69

0.43

0.23

8

2.28

0.03

2.64

0.32

0.25

9

2.42

0.05

2.6

0.27

0.34

10

2.23

0.02

2.55

0.33

0.38

11

2.13

0.01

2.58

0.17

0.41

12

2.62

0.03

2.46

0.44

0.48

13

3.13

0.02

3.32

0.37

0.35

14

3.45

0.03

3.56

0.31

0.41

15

3.67

0.02

3.74

0.24

0.35

[0029] The preparation method of the aluminum alloy described in the above embodiments is:

[0030] 1) Calculate the quality of the required...

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Abstract

The invention belongs to the technical field of aluminum alloys, and particularly relates to a heat-resistant die-casting aluminum alloy and a preparation method thereof. The heat-resistant die-casting aluminum alloy comprises the following raw materials of, by weight, 0.5wt%-3wt% of Ce, less than 0.05wt% of B, 0.5wt%-3wt% of Fe, less than 0.5wt% of Sc, less than 0.5wt% of Cu, and the balance Al and inevitable impurities. According to the heat-resistant die-casting aluminum alloy and the preparation method thereof, Ce, Sc, B and Cu are added on the basis of Al-Fe so that mechanical propertiesof the die-cast aluminum alloy under room temperature and 300 DEG C can be obviously improved, and the heat-resistant die-cast aluminum alloy can be prepared.

Description

Technical field [0001] The invention belongs to the technical field of aluminum alloys, and more specifically relates to a heat-resistant die-cast aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy is widely used in various industrial fields because of its low density, high specific strength, excellent ductility and corrosion resistance. With the development of science and technology, high-speed rail, aerospace, weapons and other fields continue to place higher requirements on aluminum alloys. Traditional Al-Si, Al-Cu, Al-Zn and Al-Mg alloys have been difficult to adapt to harsh environments. . Modern aerospace applications require aluminum alloys to have high temperature stability; but many aluminum alloys have a temperature higher than T m / 2(T m When it is the melting point of aluminum alloy), the dispersed particles and crystal grains will grow due to the temperature factor, which greatly reduces the performance. [0003] The product...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/03C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/00
Inventor 陈曦汪时宜周银鹏徐欣罗云斌赵华
Owner 苏州慧金新材料科技有限公司
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