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A kind of high thermal conductivity, corrosion resistance, heat resistance die-casting magnesium alloy and its manufacturing method

A manufacturing method and high thermal conductivity technology, applied in the field of non-ferrous metal materials and their manufacturing, can solve problems such as low thermal conductivity, and achieve the effects of high thermal conductivity, low price and reduced production cost

Active Publication Date: 2020-04-28
CHINA BAOWU STEEL GRP CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has high strength, high heat resistance and creep resistance, but its thermal conductivity has been tested and its thermal conductivity is also lower than 100W / m·K

Method used

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  • A kind of high thermal conductivity, corrosion resistance, heat resistance die-casting magnesium alloy and its manufacturing method
  • A kind of high thermal conductivity, corrosion resistance, heat resistance die-casting magnesium alloy and its manufacturing method
  • A kind of high thermal conductivity, corrosion resistance, heat resistance die-casting magnesium alloy and its manufacturing method

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Experimental program
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Effect test

Embodiment A-E

[0049] Embodiment A-E and comparative example F

[0050] The high thermal conductivity, corrosion resistance, heat-resistant die-casting magnesium alloy of embodiment A-E and the magnesium alloy of comparative example F adopt following steps to make:

[0051] (1) Put pure magnesium and pure aluminum into the smelting furnace at a temperature of 720-780°C, 6 Complete melting under gas protection;

[0052] (2) Add Mg-Mn, Mg-Ca, Mg-Sr, Mg-La master alloy at 720~780℃, SF 6 Complete melting under gas protection, wherein the addition of each element is controlled according to the mass percentage ratio of the chemical elements listed in Table 1;

[0053] (3) Refining: Control the temperature in the smelting furnace to 730-780°C, and pass argon into the melt or stir manually, and add RJ-6 flux for refining at the same time, refining for 5-15 minutes to obtain a refined melt ; Then stand at a temperature of 730-760°C for 80-120 minutes;

[0054] (4) Casting: Cool the melt down to 6...

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Abstract

The invention discloses a high-thermal-conductivity die cast magnesium alloy resistant to corrosion and thermal. The die cast magnesium alloy is prepared from, by mass percent, 1.0% to 1.6% of La, 2.0% to 4.5% of Al, 0.05% to 0.5% of Mn, 0.16% to 1.5% of Ca, 0.02% to 1.5% of Sr and the balance magnesium and other inevitable impurities. Accordingly, the invention further discloses a manufacturing method of the high-thermal-conductivity die cast magnesium alloy resistant to corrosion and thermal. The manufacturing method comprises the steps that (1) pure magnesium and pure aluminum are placed ina smelting furnace to be completely smelted; (2) Mg-Mn, Mg-Ca, Mg-Sr and Mg-La intermediate alloy is added and completely smelted; (3) refining is carried out; and (4) casting is carried out. The high-thermal-conductivity die cast magnesium alloy resistant to corrosion and thermal is machined through die casting, and has the beneficial effects of being high in thermal conductivity, resistant to corrosion and thermal and good in room-temperature mechanical property.

Description

technical field [0001] The invention relates to a nonferrous metal material and a manufacturing method thereof, in particular to a magnesium alloy using die-casting processing technology and a manufacturing method thereof. Background technique [0002] Magnesium and its alloys are the lightest metal structural materials, the density is only 1 / 4 of steel, 2 / 3 of aluminum, and has high specific strength and specific stiffness, excellent electromagnetic shielding performance, good heat dissipation, good shock absorption performance, etc. advantage. However, due to the low strength of pure magnesium (the tensile yield strength in the as-cast state is about 21MPa), it is poorly castable. Therefore, alloying is an effective method to improve its mechanical properties, castability and develop other unique properties. Therefore, magnesium alloys are mostly used in practical applications. Among the many processing methods of magnesium alloys, die casting has the advantages of short...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/06C22C1/03C22C1/06
CPCC22C1/03C22C1/06C22C23/06
Inventor 徐世伟唐伟能戴吉春蒋浩民
Owner CHINA BAOWU STEEL GRP CORP LTD