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Semi-solid die casting and high-strength-and-toughness aluminum alloy and manufacturing method thereof

A technology for casting aluminum alloys and aluminum alloys, applied in the field of high-strength and tough aluminum alloys for semi-solid die-casting and its preparation, to achieve the effects of improving die-casting process performance, excellent plasticity, and good plasticity

Active Publication Date: 2018-07-17
ZHUHAI RUNXINGTAI ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problems described above

Method used

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  • Semi-solid die casting and high-strength-and-toughness aluminum alloy and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The high strength and toughness aluminum alloy is composed of the following mass percentages: Si 6.5%, Mg 0.25%, Cu 0.15%, Ti 0.06%, V 0.1%, Sb 0.05%, Yb 0.05%, Fe≤0.2%, the rest are Al and others impurity elements. The preparation method of this high-strength aluminum alloy comprises the following steps:

[0052]1S batching and smelting: According to the above components, 99.9% instant silicon, 99.95% magnesium ingot, 99.99% electrolytic copper, 99.7% aluminum ingot, Al-10Ti alloy, Al-5V alloy, Al-10Sb alloy, Al-5Yb alloy, heat and smelt the prepared raw materials to obtain aluminum alloy liquid, wherein the smelting temperature is 750 ℃;

[0053] 2S semi-solid slurry preparation: the aluminum alloy liquid obtained in step 1S is prepared into an aluminum alloy semi-solid slurry with a temperature of 610° C. under the condition that the mechanical stirring speed is 200 rpm and the stirring time is 8 seconds;

[0054] 3S die-casting: put the aluminum alloy semi-solid s...

Embodiment 2

[0057] The high-strength and tough aluminum alloy is composed of the following mass percentages: Si 7.5%, Mg 0.45%, Cu 0.25%, Ti 0.09%, V 0.15%, Sb 0.1%, Yb 0.1%, Fe≤0.2%, the rest are Al and others For impurity elements, the individual content of other impurity elements is less than 0.05%, and the total content of other impurity elements is less than 0.15%. The preparation method of this high-strength aluminum alloy comprises the following steps:

[0058] 1S batching and smelting: According to the above components, 99.9% instant silicon, 99.95% magnesium ingot, 99.99% electrolytic copper, 99.7% aluminum ingot, Al-10Ti alloy, Al-5V alloy, Al-10Sb alloy, Al-5Yb alloy, heat and smelt the prepared raw materials to obtain aluminum alloy liquid, wherein the smelting temperature is 700 ℃;

[0059] Preparation of 2S semi-solid slurry: After refining, degassing and removing slag from the aluminum alloy liquid obtained in step 1S with hexachloroethane, the aluminum alloy liquid is pre...

Embodiment 3

[0063] The high-strength and tough aluminum alloy is composed of the following mass percentages: Si 9.5%, Mg 0.65%, Cu 0.2%, Ti 0.07%, V 0.12%, Sb 0.06%, Yb 0.08%, Fe≤0.2%, and the rest are Al and For other impurity elements, the individual content of other impurity elements is less than 0.05%, and the total content of other impurity elements is less than 0.15%. The preparation method of this high-strength aluminum alloy comprises the following steps:

[0064] 1S batching and smelting: According to the above components, 99.9% instant silicon, 99.95% magnesium ingot, 99.99% electrolytic copper, 99.7% aluminum ingot, Al-10Ti alloy, Al-5V alloy, Al-10Sb alloy, Al-5Yb alloy, heat and smelt the prepared raw materials to obtain aluminum alloy liquid, wherein the smelting temperature is 700 ℃;

[0065] 2S semi-solid slurry preparation: After refining, degassing and removing slag from the aluminum alloy liquid obtained in step 1S with hexachloroethane, the aluminum alloy liquid is pr...

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Abstract

The invention provides high-strength-and-toughness aluminum alloy. The aluminum alloy is manufactured by adopting a semi-solid die casting technology, and comprises, by mass, 6.5-9.5% of Si, 0.25-0.65% of Mg, 0.15-0.25% of Cu, 0.06-0.09% of Ti, 0.1-0.15% of V, 0.05-0.1% of Sb, 0.05-0.1% of Yb, less than or equal to 0.2% of Fe and the balance Al and other impurity elements. The high-strength-and-toughness aluminum alloy has high strength, good plasticity and excellent semi-solid die-casting process performance. The invention further provides a manufacturing method of the high-strength-and-toughness aluminum alloy.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy and its processing, in particular to a high-strength and tough aluminum alloy for semi-solid die casting and a preparation method thereof. Background technique [0002] Semi-solid die-casting molding technology refers to strong stirring during the solidification of liquid metal, so that the dendritic network skeleton that is easy to form in ordinary casting is broken to form a dispersed granular structure, thereby making semi-solid metal liquid, and then It is die cast into billets or castings. In the ordinary casting process, the primary crystals grow in the form of dendrites. When the solid phase ratio reaches about 0.2, the dendrites form a continuous network skeleton and lose macroscopic fluidity. If strong stirring is carried out during the cooling process of liquid metal from liquid phase to solid phase, the dendritic network skeleton that is easy to be formed during ordinary casting...

Claims

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Application Information

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IPC IPC(8): C22C21/02C22C1/02B22D17/00C22F1/043
CPCB22D17/007C22C1/026C22C21/02C22F1/002C22F1/043
Inventor 任怀德张莹李谷南王继成王顺成
Owner ZHUHAI RUNXINGTAI ELECTRICAL
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