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High-toughness cast aluminum-silicon alloy and waste aluminum regeneration method thereof

A technology for casting aluminum-silicon alloy and aluminum-silicon alloy, which is applied in the field of high-strength and toughness casting aluminum-silicon alloy and its waste aluminum regeneration, and can solve problems such as waste of precious metal elements.

Active Publication Date: 2019-10-18
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, most of the waste aluminum in my country is mainly used to regenerate cast aluminum alloys for some low-value-added hardware products. The precious metal elements such as silicon, magnesium, copper, zinc, manganese, chromium, and nickel contained in waste aluminum have not been effectively recovered. Utilization, resulting in a huge waste of many precious metal elements

Method used

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  • High-toughness cast aluminum-silicon alloy and waste aluminum regeneration method thereof
  • High-toughness cast aluminum-silicon alloy and waste aluminum regeneration method thereof
  • High-toughness cast aluminum-silicon alloy and waste aluminum regeneration method thereof

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Embodiment 1

[0049] A method for recycling waste aluminum of high-strength and tough cast aluminum-silicon alloys, said method comprising the steps of:

[0050] (1) select the raw material of following mass percentage: 61% aluminum-silicon alloy waste, 21% aluminum-magnesium alloy waste, 11% aluminum-copper alloy waste, 4.4% aluminum-zinc alloy waste, 2% aluminum-manganese alloy waste, 0.3% aluminum titanium carbon alloy, 0.15% aluminum strontium alloy and 0.15% aluminum boron alloy;

[0051] Among them, the chemical composition and mass percentage of aluminum-silicon alloy waste are: Si 11.8%, Cu 0.4%, Ni 0.3%, Fe 0.58%, the balance is Al and other impurity elements, and the individual content of other impurity elements is ≤0.1%, and the total amount is ≤ 0.5%;

[0052] The chemical composition and mass percentage of aluminum-magnesium alloy scrap are: Mg 2.1%, Cr 0.2%, Fe 0.26%, the balance is Al and other impurity elements, the individual content of other impurity elements is ≤0.05%, a...

Embodiment 2

[0067] A method for recycling waste aluminum of high-strength and tough cast aluminum-silicon alloys, said method comprising the steps of:

[0068] (1) select the following raw materials in mass percentage: 59% aluminum-silicon alloy waste, 21% aluminum-magnesium alloy waste, 11.6% aluminum-copper alloy waste, 6% aluminum-zinc alloy waste, 2% aluminum-manganese alloy waste, 0.2% aluminum titanium carbon alloy, 0.1% aluminum strontium alloy and 0.1% aluminum boron alloy;

[0069] Among them, the chemical composition and mass percentage of aluminum-silicon alloy waste are: Si 11.0%, Cu 0.3%, Ni 0.1%, Fe 0.44%, the balance is Al and other impurity elements, the individual content of other impurity elements is ≤0.1%, and the total amount is ≤ 0.5%;

[0070] The chemical composition and mass percentage of aluminum-magnesium alloy scrap are: Mg 3.0%, Cr 0.3%, Fe 0.34%, the balance is Al and other impurity elements, the individual content of other impurity elements is ≤0.05%, and th...

Embodiment 3

[0085] A method for recycling waste aluminum of high-strength and tough cast aluminum-silicon alloys, said method comprising the steps of:

[0086] (1) select the raw material of following mass percentage: 59% aluminum-silicon alloy waste, 21% aluminum-magnesium alloy waste, 11% aluminum-copper alloy waste, 6% aluminum-zinc alloy waste, 2.2% aluminum-manganese alloy waste, 0.4% aluminum titanium carbon alloy, 0.2% aluminum strontium alloy and 0.2% aluminum boron alloy;

[0087] Among them, the chemical composition and mass percentage of aluminum-silicon alloy waste are: Si 11.4%, Cu0.1%, Ni 0.3%, Fe 0.59%, the balance is Al and other impurity elements, and the individual content of other impurity elements is ≤0.1%, the total ≤0.5%;

[0088] The chemical composition and mass percentage of aluminum-magnesium alloy scrap are: Mg 2.6%, Cr 0.2%, Fe 0.38%, the balance is Al and other impurity elements, and the individual content of other impurity elements is ≤0.05%, and the total a...

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Abstract

The invention relates to a high-toughness cast aluminum-silicon alloy and a waste aluminum regeneration method thereof. The method sequentially comprises the following steps that waste aluminum is prepared and smelted, melt is refined and subjected to modification treatment, furnace interior blowing refining and gas and impurity removal treatment are conducted, casting forming is conducted, and solid solution treatment and artificial aging are conducted. Through optimization design of the waste aluminum proportion and refining modification treatment of the aluminum alloy melt, danger to strength and plasticity of the cast aluminum-silicon alloy from thick alpha-Al branch crystals, the needle sheet type eutectic Si phase and the Fe-rich phase are eliminated, and the strength and plasticityof the cast aluminum-silicon alloy are improved. According to the high-toughness cast aluminum-silicon alloy and the waste aluminum regeneration method thereof, waste aluminum serves as a main raw material to directly regenerate the high-toughness cast aluminum-silicon alloy, cyclic utilization of aluminum, silicon, magnesium, copper and other metal resources is achieved, the waste aluminum usagevalue is improved, the cast aluminum-silicon alloy production cost is reduced, and the cast aluminum-silicon alloy has high strength, good plasticity and good abrasion resisting and heat resisting performance.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy preparation, and in particular relates to a high-strength and tough cast aluminum-silicon alloy and a recycling method for waste aluminum. Background technique [0002] Cast aluminum-silicon alloy is a cast aluminum alloy with silicon as the main alloy element. It is the cast aluminum alloy with the largest amount and variety in the casting field. It has good casting performance, machining performance and wear resistance, and is widely used in automobiles and motorcycles. Vehicles, electronic appliances, mechanical equipment and other fields. With the development of lightweight transportation such as automobiles and motorcycles, the demand for high-strength and toughness cast aluminum-silicon alloys is increasing. [0003] At present, high-strength and tough cast aluminum-silicon alloys are mainly made of pure aluminum as the main raw material, and alloying elements such as silicon, magnes...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22F1/043C22C21/04
CPCC22C1/026C22C1/03C22C21/04C22F1/043
Inventor 王顺成宋东福黄惠兰康跃华陈峰
Owner GUANGDONG INST OF NEW MATERIALS
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