High-thermal-conductivity die-casting magnesium alloy and manufacturing method thereof

A manufacturing method and high thermal conductivity technology, applied in the field of die-casting magnesium alloy and its manufacturing, can solve problems not related to mechanical properties, optimization, etc., to achieve the effect of improving mechanical properties at room temperature and high temperature, increasing fluidity, and reducing aluminum content

Active Publication Date: 2019-09-03
CHINA BAOWU STEEL GRP CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of magnesium alloy has a high thermal conductivity (102 ~ 122W / m K), but it does not involve the optimization of mechanical properties

Method used

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  • High-thermal-conductivity die-casting magnesium alloy and manufacturing method thereof
  • High-thermal-conductivity die-casting magnesium alloy and manufacturing method thereof
  • High-thermal-conductivity die-casting magnesium alloy and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6 and comparative example 1

[0046]Table 1 lists the mass percentage of each chemical element in the high thermal conductivity die-casting magnesium alloy of Examples 1-6 and the AZ91 magnesium alloy of Comparative Example 1.

[0047] Table 1. (wt%, the balance is Mg and other unavoidable impurities)

[0048] Al La Sr mn Zn Example 1 6 5 0.3 0.5 0 Example 2 5 7 0.8 0.4 0 Example 3 5 6 1.0 0.2 0 Example 4 7 8 0.4 0.3 0 Example 5 5.5 7.5 0.9 0.25 0 Example 6 6.5 5.5 0.5 0.45 0 Comparative example 1 9

0

0

0.3 1

[0049] The high heat conduction die-casting magnesium alloy of embodiment 1-6 adopts following steps to make:

[0050] (1) Put the crucible into the heating furnace to preheat to 300°C±10°C, and then spray the release agent on the inner wall of the crucible;

[0051] (2) When the temperature of the crucible reaches 500°C±10°C, put the pure magnesium ingot into the crucible and pass it into SF ...

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Abstract

The invention discloses a high-thermal-conductivity die-casting magnesium alloy. The alloy comprises the following chemical elements of, by mass, 5-7 wt% of Al, 5-8 wt% of La, 0.3-1 wt% of Sr, 0.2-0.5wt% of Mn, and the balance Mg and other inevitable impurities. The invention further discloses a manufacturing method of the high-thermal-conductivity die-casting magnesium alloy. The manufacturing method comprises the following steps that (1) a crucible is put in a heating furnace to be preheated, and then a release agent is sprayed on the inner wall of the crucible; (2) a pure magnesium ingot isput into the crucible, mixed gas of SF6 and CO2 is introduced into the crucible, heating is conducted to enable the pure magnesium ingot to be completely molten, and heat preservation is conducted for a period of time, then cooling is conducted to 740 DEG C + / -10 DEG C, and pure Al, an Mg-La intermediate alloy, an Mg-Sr intermediate alloy and an Mg-Mn intermediate alloy are added; (3) after complete melting is conducted, cooling is conducted to 720 + / -10 DEG C, stirring is conducted to remove slag, and standing is conducted; (4) the crucible is cooled, and a magnesium alloy ingot is taken out; and (5) the magnesium alloy ingot is molten in a smelting furnace of a die-casting machine and is subjected to heat preservation, and then the molten magnesium alloy is injected into a die-casting die to obtain the high-thermal-conductivity die-casting magnesium alloy.

Description

technical field [0001] The invention relates to a magnesium alloy and a manufacturing method thereof, in particular to a die-casting magnesium alloy and a manufacturing method thereof. Background technique [0002] With the urgent need for lightweight and portable communication electronic products, the application of magnesium alloys in 3C product radiators has attracted widespread attention. The thermal conductivity of pure magnesium is high, but the strength is too low. After alloying, the strength of magnesium alloy is significantly improved, but the thermal conductivity is usually significantly reduced. In recent years, some high-strength thermally conductive magnesium alloys have been developed, but these alloys are basically deformed alloys and are not suitable for die-casting. Most radiators for electronic products are produced by casting process. Therefore, how to improve the thermal conductivity of magnesium alloys and maintain their good casting performance and me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/02C22C23/06C22C1/03B22D17/00
CPCB22D17/00C22C1/03C22C23/02C22C23/06
Inventor 徐世伟唐伟能张春伟郑明毅谢玉张成
Owner CHINA BAOWU STEEL GRP CORP LTD
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