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High-thermal-conductivity die-casting magnesium alloy and preparation technology thereof

A high thermal conductivity, magnesium alloy technology, applied in the field of deformation processing of metal materials and non-ferrous metal materials, can solve the problems of expensive alloys, unfinished mechanical properties, high content of rare earth element La, and achieve high mechanical properties at room temperature, good flow properties, Good die casting performance

Active Publication Date: 2016-07-20
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the alloy contains La, Zr and other elements, especially the rare earth element La content is high, the price of the alloy is relatively expensive, and its mechanical properties have not reached the level of commercial application alloy AZ91, so it is not accepted by most users at present.
[0008] At present, there are few reports on the composition design of thermally conductive magnesium alloys at home and abroad. It is urgent to carry out research on the influence of alloying elements on the thermal conductivity of magnesium alloys and its mechanism, and to develop new high-performance high-thermal conductive magnesium alloys and related preparation technologies to meet the needs of users. The market urgently needs high thermal conductivity die-casting magnesium alloys

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] According to the design mass fraction Mg-8Zn-0.5Ca-0.5Ce ratio alloy material; in CO 2 +SF 6 Add the prepared pure Mg ingot into the gas-shielded crucible furnace, heat it to 720°C until it is completely melted, then raise the temperature to 760°C and add the prepared pure Zn, Mg-Ca master alloy and Mg-Ce master alloy in turn, until the alloy is completely After melting, fully stir for 10 minutes, add RJ-5 refining agent to refine for 10 minutes, remove surface scum, keep it at 760°C for 15 minutes, and cast it into a magnesium alloy square ingot;

[0036] Magnesium alloy ingots were remelted and die-cast on a 300-ton hot chamber die-casting machine. The melt temperature was 680°C, and the mold temperature was 280°C. The magnesium alloy die-casting was obtained, and the die-casting process had good filling properties.

[0037] The thermal conductivity and mechanical properties of the die-casting alloy are shown in Table 1: the thermal conductivity of the alloy at room ...

Embodiment 2

[0039] According to the design mass fraction Mg-10Zn-0.5Ca-0.5La proportioning materials;

[0040] in CO 2 +SF 6 Add the prepared pure Mg ingot into the gas-shielded crucible furnace, heat it to 720°C until it is completely melted, then raise the temperature to 760°C and add the prepared pure Zn, Mg-Ca master alloy and Mg-La master alloy in sequence, and wait for the alloy to melt After that, fully stir for 8 minutes, add RJ-5 refining agent to refine for 10 minutes, remove surface scum, keep it at 760°C for 20 minutes, and then transfer the melt to the heat preservation crucible furnace of the die-casting machine;

[0041] Die-casting on a 300-ton hot-chamber die-casting machine with a melt temperature of 690°C and a mold temperature of 290°C to obtain the alloy die-casting, which has good die-casting performance and mold filling.

[0042] Its thermal conductivity and mechanical properties are shown in Table 1: the thermal conductivity of the alloy at room temperature reach...

Embodiment 3

[0044] According to the design mass fraction Mg-10Zn-0.5Ca-1.0La ratio material; in CO 2 +SF 6 Add the prepared pure Mg ingot into the gas-shielded crucible furnace, heat it to 720°C until it is completely melted, then raise the temperature to 760°C and add the prepared pure Zn, Mg-Ca master alloy and Mg-La master alloy in sequence, and wait for the alloy to melt After that, fully stir for 9 minutes, add RJ-5 to refine for 15 minutes, remove surface scum, keep it at 760°C for 15 minutes, and transfer the melt to the heat preservation crucible furnace of the die-casting machine;

[0045] Die-cast on a 300-ton hot-chamber die-casting machine with a melt temperature of 700°C and a mold temperature of 290°C to obtain the alloy die-casting, which has good die-casting performance and mold filling.

[0046] Its thermal conductivity and mechanical properties are shown in Table 1: the thermal conductivity of the alloy at room temperature reaches 105W (m K) -1 , about 2 times that of ...

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Abstract

The invention discloses high-thermal-conductivity die-casting magnesium alloy and a preparation technology thereof. Chemical components of the high-thermal-conductivity die-casting magnesium alloy comprise, by mass, 8-13% of Zn, 0.1-1% of Ca, 0-1% of Mn, 0-1% of La, 0-1% of Ce and the balance Mg, wherein the content of Mn, the content of La and the content of Ce are not zero at the same time. The magnesium alloy is suitable for die casting and has excellent mechanical properties and high thermal conductivity, the thermal conductivity of the magnesium alloy at room temperature can reach about two times that of commonly used die-casting AZ91, and the tensile strength of the magnesium alloy is similar to that of AZ91 magnesium alloy.

Description

technical field [0001] The invention relates to the technical field of deformation processing of nonferrous metal materials, belongs to the technical field of metal materials, and in particular relates to a high thermal conductivity die-casting magnesium alloy and a preparation process thereof. Background technique [0002] Magnesium alloy is the lightest structural material currently used. Its density is 2 / 3 of aluminum and 1 / 5 of steel. It has high specific strength and specific modulus, rich resources, energy saving and environmental protection. Due to its low density, high specific strength, recyclability and other advantages, it is known as "the most potential green metal engineering material in the 21st century". [0003] Die-casting technology is currently one of the most widely used and fastest-growing precision forming technologies for metal parts in magnesium alloy casting technology, which meets the requirements of modern manufacturing products for complexity, pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C23/04C22C1/03B22D17/00
Inventor 徐世伟唐伟能秦云蒋浩民张丕军
Owner BAOSHAN IRON & STEEL CO LTD
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