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Die-casting rare earth aluminum alloy with characteristics of high fluidity and oxidability

A high fluidity, aluminum alloy technology, applied in the field of metal material processing, can solve the problems of poor mechanical properties, poor corrosion resistance, poor anodic oxidation performance, etc., and achieve the effect of good die casting performance, good corrosion resistance and good oxidation effect.

Inactive Publication Date: 2015-07-22
苏州聚数精密铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of alloy has excellent die-casting properties, but cannot obtain various die-castings (castings) with metallic luster
Aluminum-silicon alloy die castings (castings), once chemically treated, the surface becomes gray and black, with poor mechanical properties and high brittleness
Although other aluminum-magnesium alloys have excellent surface treatment performance, their die-casting performance is not good, and they have defects such as easy mold sticking, hot cracking, insufficient pouring, cold shut and porosity, and their mechanical properties and hardness are not high.
Traditional die-casting aluminum alloys have poor anodic oxidation performance, low strength, poor corrosion resistance, and fluidity that cannot meet product material requirements

Method used

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  • Die-casting rare earth aluminum alloy with characteristics of high fluidity and oxidability
  • Die-casting rare earth aluminum alloy with characteristics of high fluidity and oxidability
  • Die-casting rare earth aluminum alloy with characteristics of high fluidity and oxidability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Pure aluminum (A00 aluminum), aluminum-manganese alloy (AlMn10), aluminum-silicon alloy (AlSi12), aluminum-iron alloy (AlFe20), pure magnesium (99.9), pure zinc (99.95), rare earth aluminum-titanium-boron alloy (AlTi5BRE10), magnesium Samarium-cerium alloy (MgSmCe20) and magnesium-strontium alloy (MgSr25), after batch calculation, smelting and pouring, the weight percentage content of the main elements of the final alloy is as follows: figure 1 shown.

[0041] The alloy is die-cast into a 2mm tensile specimen, and the tensile properties at room temperature are tested:

[0042] Tensile strength = 350MPa, yield strength = 270MPa, elongation = 7.6%.

[0043] Alloy oxidation effect: uniform color, bright color, smooth surface, oxide film thickness of 20-25μm.

Embodiment 2

[0045] Pure aluminum (A00 aluminum), aluminum-manganese alloy (AlMn10), aluminum-silicon alloy (AlSi12), aluminum-iron alloy (AlFe20), pure magnesium (99.9), pure zinc (99.95), rare earth aluminum-titanium-boron alloy (AlTi5BRE10), magnesium Samarium-cerium alloy (MgSmCe20) and magnesium-strontium alloy (MgSr25), through batching calculation, smelting and pouring, the final alloy obtained: the weight percentage content of the main elements is as follows figure 2 shown.

[0046] The alloy is die-cast into a 0.6mm tensile specimen, and the tensile properties at room temperature are tested:

[0047] Tensile strength = 273MPa, yield strength = 180MPa, elongation = 6.2%.

[0048] Alloy oxidation effect: uniform color, bright color, smooth surface, oxide film thickness of 25μm.

Embodiment 3

[0050] Pure aluminum (A00 aluminum), aluminum-manganese alloy (AlMn10), aluminum-silicon alloy (AlSi12), aluminum-iron alloy (AlFe20), pure magnesium (99.9), pure zinc (99.95), rare earth aluminum-titanium-boron alloy (AlTi5BRE10), magnesium Samarium-cerium alloy (MgSmCe20) and magnesium-strontium alloy (MgSr25), after batch calculation, smelting and pouring, the weight percentage content of the main elements of the final alloy is as follows: image 3 shown.

[0051] The alloy is die-cast into a 0.8mm tensile specimen, and the tensile properties at room temperature are tested:

[0052] Tensile strength = 289MPa, yield strength = 191MPa, elongation = 5.3%.

[0053] Alloy oxidation effect: uniform color, bright color, smooth surface, oxide film thickness of 30μm.

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Abstract

The present invention discloses a die-casting rare earth aluminum alloy with characteristics of high fluidity and oxidability. The die-casting rare earth aluminum alloy contains, by weight, 1.8-4% of Si, 0.03-0.15% of Cu, 0.2-0.9% of Fe, 0-0.7% of Mn, 0-1.8% of Mg, 0.2-1.6% of Zn, 0-0.15% of Ti, 0.2-0.45% of Sm, 0.1-0.3% of Ce, 0.01-0.15% of Sr, 0-0.1% of B, and the balance of Al and unavoidable impurities. The die-casting rare earth aluminum alloy has characteristics of high strength, good die-casting performance, good oxidation effect, good corrosion resistance, and low price, and meets the high requirements of vehicle products, household products and 3C products on the material.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a high-strength, anodizable die-casting rare earth aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy is an alloy composed of aluminum as the base and other elements. It is the most commonly used material in structural engineering. It has the characteristics of small specific gravity, good heat transfer, good electrical conductivity, environmental protection, and recyclable recycling. It is widely used in 3C , automotive transportation, home furnishing, aerospace, chemical and rocket and other fields. [0003] Among the existing die-casting (casting) aluminum alloys, aluminum-silicon alloys account for the majority. This type of alloy has excellent die-casting performance, but various die-castings (castings) with metallic luster cannot be obtained. Aluminum-silicon alloy die castings (castings), once chemically treate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C21/00C22C1/03C22C1/06
Inventor 单巍巍刘金平
Owner 苏州聚数精密铸造有限公司
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