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A high-fluidity, high-strength and toughness cast magnesium alloy material

A technology of casting magnesium alloy and high fluidity, which is applied in the field of casting magnesium alloy materials in the field of metal material technology, can solve the problems of poor casting flow filling, poor large-scale civilian promotion, high price, etc., and achieve excellent thin-wall filling ability, excellent mechanical properties at room temperature, cost-saving and resource-saving effects

Active Publication Date: 2017-07-25
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rare earth content of this alloy is very high, the price is expensive, the popularization of large-scale civil use is poor, and the casting flow filling performance is not good.
[0005] In addition, Chinese patent CN104630584A describes a high-fluidity, high-strength magnesium alloy for ultra-thin-walled parts and its preparation method. The alloy composition is composed of rare earth elements such as magnesium, aluminum, zinc, manganese, and antimony, and the tensile strength of the alloy can reach 300 MPa. , the yield strength can reach 200MPa. The alloy reported in this invention is used in the production of magnesium alloy ingots. Since the pouring temperature of the alloy is not higher than 690°C, it is difficult to form magnesium alloy castings with complex structures. For the limit casting wall thickness that can be achieved No report, limited application in magnesium alloy castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-fluidity, high-strength and toughness cast magnesium alloy material consists of the following components: Zn: 5.3%, Ce: 1.6%, Nd: 1.45%, Ag: 0.5%, Zr: 0.55%, Fe=0.002%, Ni= 0.002%, Cu=0.003%, and the balance is Mg, calculated by mass percentage. Its preparation method comprises the following steps:

[0021] (1) Put 240kg of pure magnesium ingots with a magnesium content greater than 99.5% in a low-carbon steel smelting crucible, and evenly sprinkle RJ-2 flux into the bottom of the magnesium ingots and in each stacking layer. The amount of RJ-2 flux accounts for The mass fraction of magnesium ingots is 1.2%, and then the temperature of the melting furnace is set to 838°C to melt the magnesium ingots rapidly, and the melt temperature is adjusted to 750°C, and then the self-made high-density refining agent is used with a low-carbon steel mechanical stirrer The melt is refined, and then the temperature of the melt is adjusted to 700°C.

[0022] (2) When the tempera...

Embodiment 2

[0027]A high-fluidity, high-strength and toughness cast magnesium alloy material consists of the following components: Zn: 5.5%, Ce: 1.4%, Nd: 1.7%, Ag: 0.65%, Zr: 0.75%, Fe=0.001%, Ni= 0.003%, Cu=0.002%, and the balance is Mg, calculated by mass percentage. The preparation method comprises the following steps:

[0028] (1) Put 119kg of pure magnesium ingots with a magnesium content greater than 99.5% in a low-carbon steel smelting crucible, and evenly sprinkle RJ-2 flux into the bottom of the magnesium ingots and in each stacking layer. The amount of RJ-2 flux accounts for The mass fraction of magnesium ingots is 1%, and then the temperature of the melting furnace is set to 830°C to melt the magnesium ingots rapidly, and the melt temperature is adjusted to 760°C, and then the self-made high-density refining agent is used with a low-carbon steel mechanical stirrer Carry out refining treatment on the melt, and then adjust the melt temperature to 710°C.

[0029] (2) When the t...

Embodiment 3

[0034] A high-fluidity, high-strength and toughness cast magnesium alloy material consists of the following components: Zn: 5%, Ce: 1.9%, Nd: 1.3%, Ag: 0.3%, Zr: 0.4%, Fe=0.004%, Ni= 0.01%, Cu=0.01%, and the balance is Mg, calculated by mass percentage.

[0035] (1) Put 386kg of pure magnesium ingots with a magnesium content greater than 99.5% in a low-carbon steel smelting crucible, and evenly sprinkle RJ-2 flux into the bottom of the magnesium ingot and in each stacking layer. The amount of RJ-2 flux accounts for The mass fraction of magnesium ingot is 1.5%, and then the temperature of the melting furnace is set to 850°C to melt the magnesium ingot rapidly, and the melt temperature is adjusted at 756°C, and then the self-made high-density refining agent is used with a low-carbon steel mechanical stirrer, Carry out refining treatment on the melt, and then adjust the melt temperature to 706°C.

[0036] (2) When the temperature of the melt in the melting crucible is about to r...

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Abstract

The invention provides a high-flowability and high-toughness casting magnesium alloy material. The high-flowability and high-toughness casting magnesium alloy material is prepared from, by mass, 5-5.5% of Zn, 1.4-1.9% of Ce, 1.3-1.7% of Nd, 0.3-0.65% of Ag, 0.4-0.75% of Zr, not larger than 0.004% of Fe, not larger than 0.01% of Ni, not larger than 0.01% of Cu, and the balance Mg. The cost and resources are saved, the high-flowability and high-toughness casting magnesium alloy material has the better thin-wall mold-filling capacity than conventional high-strength casting magnesium alloy, suitable for producing thin-wall complex magnesium alloy castings on the basis of sand mold, metal mold, gypsum mold and other casting molding technologies, and the alloy castings are better in mechanical property at normal temperature after heat treatment and has the strong application and popularization prospect.

Description

technical field [0001] The invention relates to a cast magnesium alloy material in the technical field of metal materials, in particular to a cast magnesium alloy material with high fluidity and high strength and toughness. Background technique [0002] Compared with cast structural materials commonly used in industry, cast magnesium alloys have the advantages of low density, high specific stiffness, high specific strength, shock absorption, and good machinability, but conventional cast magnesium alloys have poor toughness and high rare earth content cast magnesium The high price and poor fluidity of alloys have become one of the main problems that limit the wide application of cast magnesium alloys in aerospace, aviation and national defense. [0003] Cast magnesium alloys can be roughly divided into magnesium-aluminum-zinc series, magnesium-zinc-zirconium series and magnesium rare earth series. Among them, the magnesium-aluminum-zinc cast magnesium alloy has become the mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/04C22C1/03C22F1/02C22F1/06
CPCC22C1/03C22C23/04C22F1/002C22F1/02C22F1/06
Inventor 陈强万元元赵高瞻孙昌建赵祖德宁海青梅华生王长朋
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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