High-strength high-thermal-conductivity AlSi aluminum alloy and preparation method thereof

An aluminum alloy, high-strength technology, applied in the field of material manufacturing, can solve problems such as difficult to find materials, and achieve the effect of meeting strict performance requirements, excellent comprehensive mechanical properties and thermal conductivity, and good casting performance

Pending Publication Date: 2022-05-27
南通鸿劲金属铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it is difficult to find suitable materials among the existing die-casting aluminum alloys.

Method used

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  • High-strength high-thermal-conductivity AlSi aluminum alloy and preparation method thereof
  • High-strength high-thermal-conductivity AlSi aluminum alloy and preparation method thereof
  • High-strength high-thermal-conductivity AlSi aluminum alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: a high-strength and high-thermal-conductivity AlSi aluminum alloy, including the following elements prepared by mass percentage: Cu0.45%-0.65%, Si8.5.%-9.5%, Mn0.35%-0.55%, Mg0 .3%-0.55%, Fe≤0.25%, Zn≤0.15%, Ca≤20ppm, P≤20ppm, Sr0.015%-0.025%, B0.0045%-0.01%, La+Ce0.015%-0.035% , the balance is Al and impurities, the total content of impurities is not more than 0.15%, the tensile strength of the high-strength and high-thermal conductivity AlSi aluminum alloy at room temperature is 305-315MPa, the yield strength is 140-150MPa, and the elongation after fracture is 4.5- 5.6%, the thermal conductivity is 140-150W / m.K.

[0039] The present invention also relates to a method for a high-strength and high-thermal-conductivity AlSi aluminum alloy, specifically:

[0040] S1. Prepare raw materials according to the percentage of each element in the formula of the aluminum alloy material;

[0041] S2, melting: pour the raw materials in step S1 into the melting furnac...

Embodiment 2

[0055] Embodiment 2: A high-strength and high-thermal-conductivity AlSi aluminum alloy, comprising the following elements prepared by mass percentage: Cu0.45%-0.65%, Si9.5.%-10.5%, Mn0.35%-0.55%, Mg0 .3%-0.55%, Fe≤0.25%, Zn≤0.15%, Ca≤20ppm, P≤20ppm, Sr0.015%-0.025%, B0.0045%-0.01%, La+Ce0.015%-0.035% , the balance is Al and impurities, and the total content of impurities is not more than 0.15%; the as-cast room temperature tensile strength of the high-toughness AlSi aluminum alloy is 315-335MPa, the yield strength is 145-165MPa, and the elongation after fracture is 5.5-6.5% , the thermal conductivity is 150-165W / m.K.

[0056] The present invention also relates to a method for a high-strength and high-thermal-conductivity AlSi aluminum alloy, specifically:

[0057] S1. Prepare raw materials according to the percentage of each element in the formula of the aluminum alloy material;

[0058] S2, melting: pour the raw materials in step S1 into the melting furnace to heat up and m...

Embodiment 3

[0072]Embodiment 3: A high-strength and high-thermal-conductivity AlSi aluminum alloy, comprising the following elements prepared by mass percentage: the Cu0.45%-0.65%, Si10.5%-11.5%, Mn0.35%-0.55% , Mg0.3%-0.55%, Fe≤0.25%, Zn≤0.15%, Ca≤20ppm, P≤20ppm, Sr0.015%-0.025%, B0.0045%-0.01%, La+Ce0.015%- 0.035%, the balance is Al and impurities, the total content of impurities is not more than 0.15%, the tensile strength of the high-strength and high-thermal-conductivity AlSi aluminum alloy as-cast room temperature is 305-318MPa, the yield strength is 145-158MPa, and the elongation after fracture is 305-318MPa. 4.5-5.9% thermal conductivity is 140-155W / m.K. ,.

[0073] The present invention also relates to a method for a high-strength and high-thermal-conductivity AlSi aluminum alloy, specifically:

[0074] S1. Prepare raw materials according to the percentage of each element in the formula of the aluminum alloy material;

[0075] S2. Melting: Pour the raw materials in step S1 int...

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Abstract

The invention relates to a high-strength and high-thermal-conductivity AlSi aluminum alloy and a preparation method thereof, and the high-strength and high-thermal-conductivity AlSi aluminum alloy comprises the following components in percentage by mass: 0.15%-0.65% of Cu, 8.5%-11.5% of Si, 0.35%-0.55% of Mn, 0.3%-0.55% of Mg, less than or equal to 0.25% of Fe, less than or equal to 0.15% of Zn, less than or equal to 20 ppm of Ca, less than or equal to 20 ppm of P, 0.010%-0.035% of Sr, 0.0045%-0.01% of B, 0.015%-0.035% of La + Ce and the balance of Al and impurities, and the total content of the impurities is less than or equal to 0.15%. The invention has the following advantages: on the premise of ensuring good casting performance, the die casting has excellent comprehensive mechanical properties and heat-conducting properties, thereby meeting the harsh performance requirements of motor shells and electric control shells of new energy vehicles.

Description

technical field [0001] The invention relates to an AlSi aluminum alloy with high strength and high thermal conductivity and a preparation method thereof, and relates to the technical field of material manufacturing. Background technique [0002] In recent years, with the rapid development of industries such as new energy vehicles, the performance requirements for automotive materials have become more stringent. In addition, due to social pressures such as energy saving, emission reduction and environmental pollution, lightweight has become a strategic development demand. Therefore, the new energy vehicle industry requires higher strength and higher thermal conductivity in the design of motor housing and electronic control housing parts in order to achieve the goal of high heat dissipation. Most die-casting aluminum alloys have medium strength and poor thermal conductivity (<100W / m.K), such as ADC12, A380 and other traditional die-casting aluminum alloys. [0003] As the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02B22D17/00B22D17/32C22C1/02C22C1/06
CPCC22C21/02C22C1/026C22C1/06B22D17/00B22D17/32Y02T10/64
Inventor 程汉明姜鹏飞陆梁张达成
Owner 南通鸿劲金属铝业有限公司
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