A kind of magnesium alloy for cold stamping forming and its preparation method

Abstract

The invention relates to a magnesium alloy for cold stamping forming and a preparation method thereof, belonging to the technical field of magnesium alloy materials. The magnesium alloy is composed of the following components in terms of mass percentage: Zn 1.6-2.4%; Mn 0.6-1.4% ; Ca 0.01‑1%; Gd 0.1‑3%; Sn 0.01‑1%; unavoidable impurities ≤ 0.2%; the balance is magnesium. The preparation method includes four processes of batching, smelting, homogenizing treatment and extrusion. Through scientific alloying composition design and appropriate heat treatment process, the magnesium alloy has excellent plastic deformation ability, which can be used for cold stamping and stamping. The cupping value of a thin plate with a thickness of 0.5±0.05mm rolled by this magnesium alloy All ≥ 6mm. The magnesium alloy preparation method is simple and easy to operate, only needs conventional equipment, has low cost, and is suitable for industrial production.

Description

technical field

[0001] The invention belongs to the technical field of magnesium alloy materials, and in particular relates to a magnesium alloy used for cold stamping forming and a preparation method thereof. Background technique

[0002] With the gradual development of environmental pollution and green energy, magnesium alloys, as the most promising light metal materials in recent years, are gradually increasing and expanding in the fields of rail transportation, intelligent manufacturing and military aviation. Especially in recent years, 3C electronic products and micro-smart equipment have developed rapidly, and the demand for lightweight materials and economical practicability is increasing. At present, the development of 5G network operations is relatively hot, and many product developments are inseparable from magnesium alloys.

[0003] Magnesium alloy can be used for cold stamping, stamping computer board shell and mobile phone shell, etc. It has good cold stamping p...

Examples

Embodiment 1

[0024] A magnesium alloy for cold stamping forming, the magnesium alloy is composed of the following components in terms of mass percentage: Zn 1.6%; Mn 1.2%; Ca 0.5%; Gd 0.5%; Sn 0.02%; unavoidable impurities ≤0.2%; the balance is magnesium. The preparation method of this magnesium alloy is as follows:

[0025] (1) Ingredients: According to the mass percentage of each component in the above-mentioned magnesium alloy, weigh magnesium ingot, zinc ingot, MnCl 2 , pure calcium, Mg-30% Gd master alloy and tin ingot, and preheat each raw material at 250°C for 2 hours;

[0026] (2) Melting: Preheat the crucible to 550°C and sprinkle RJ-2 flux, then put magnesium ingots into the crucible for melting, and add zinc ingots, tin ingots and MnCl after heating up to 720°C 2 After alloying and stirring for 15 minutes, heat up to 750°C, add Mg-30% Gd master alloy and pure calcium, alloy and stir again for 15 minutes, refine with refining agent, refine and stir at 740°C for 20 minutes, then...

Embodiment 2

[0030] A magnesium alloy for cold stamping forming, the magnesium alloy is composed of the following components in terms of mass percentage: Zn 2.4%; Mn 0.6%; Ca 0.08%; Gd 3.0%; Sn 1.0%; unavoidable impurities ≤0.2%; the balance is magnesium. The preparation method of this magnesium alloy is as follows:

[0031] (1) Ingredients: According to the mass percentage of each component in the above-mentioned magnesium alloy, weigh magnesium ingot, zinc ingot, Mg-10%Mn master alloy, Mg-30%Ca master alloy, Mg-30%Gd master alloy and tin Ingot, and preheat each raw material at 150°C for 3h;

[0032] (2) Melting: preheat the crucible to 600°C and sprinkle RJ-2 flux, then put magnesium ingots into the crucible for melting, and add zinc ingots, tin ingots and Mg-10%Mn master alloy after heating up to 730°C After alloying and stirring for 10 minutes, heat up to 760°C, add Mg-30% Gd master alloy and Mg-30% Ca master alloy, alloy and stir again for 10 minutes, refine with refining agent, ref...

Embodiment 3

[0036] A magnesium alloy for cold stamping and stamping, the magnesium alloy is composed of the following components in terms of mass percentage: Zn 2.0%; Mn 1.4%; Ca 1.0%; Gd 2.0%; Sn 0.5%; unavoidable impurities ≤0.2%; the balance is magnesium. The preparation method of this magnesium alloy is as follows:

[0037] (1) Ingredients: according to the mass percent of each component in the above-mentioned magnesium alloy, take magnesium ingot, zinc ingot, Mg-10%Mn master alloy, pure calcium, Mg-30%Gd master alloy and tin ingot, and each The raw material is preheated at 350°C for 1 hour;

[0038] (2) Melting: Preheat the crucible to 450°C and sprinkle RJ-2 flux, then put magnesium ingots into the crucible for melting, and add zinc ingots, tin ingots and Mg-10%Mn master alloy after heating up to 710°C After alloying and stirring for 20 minutes, heat up to 740°C, add Mg-30% Gd intermediate alloy and pure calcium, alloy and stir again for 20 minutes, refine with refining agent, ref...

technical field

[0001] The invention belongs to the technical field of magnesium alloy materials, and in particular relates to a magnesium alloy used for cold stamping forming and a preparation method thereof. Background technique

[0002] With the gradual development of environmental pollution and green energy, magnesium alloys, as the most promising light metal materials in recent years, are gradually increasing and expanding in the fields of rail transportation, intelligent manufacturing and military aviation. Especially in recent years, 3C electronic products and micro-smart equipment have developed rapidly, and the demand for lightweight materials and economical practicability is increasing. At present, the development of 5G network operations is relatively hot, and many product developments are inseparable from magnesium alloys.

[0003] Magnesium alloy can be used for cold stamping, stamping computer board shell and mobile phone shell, etc. It has good cold stamping p...

Examples

Embodiment 1

[0024] A magnesium alloy for cold stamping forming, the magnesium alloy is composed of the following components in terms of mass percentage: Zn 1.6%; Mn 1.2%; Ca 0.5%; Gd 0.5%; Sn 0.02%; unavoidable impurities ≤0.2%; the balance is magnesium. The preparation method of this magnesium alloy is as follows:

[0025] (1) Ingredients: According to the mass percentage of each component in the above-mentioned magnesium alloy, weigh magnesium ingot, zinc ingot, MnCl 2 , pure calcium, Mg-30% Gd master alloy and tin ingot, and preheat each raw material at 250°C for 2 hours;

[0026] (2) Melting: Preheat the crucible to 550°C and sprinkle RJ-2 flux, then put magnesium ingots into the crucible for melting, and add zinc ingots, tin ingots and MnCl after heating up to 720°C 2 After alloying and stirring for 15 minutes, heat up to 750°C, add Mg-30% Gd master alloy and pure calcium, alloy and stir again for 15 minutes, refine with refining agent, refine and stir at 740°C for 20 minutes, then...

Embodiment 2

[0030] A magnesium alloy for cold stamping forming, the magnesium alloy is composed of the following components in terms of mass percentage: Zn 2.4%; Mn 0.6%; Ca 0.08%; Gd 3.0%; Sn 1.0%; unavoidable impurities ≤0.2%; the balance is magnesium. The preparation method of this magnesium alloy is as follows:

[0031] (1) Ingredients: According to the mass percentage of each component in the above-mentioned magnesium alloy, weigh magnesium ingot, zinc ingot, Mg-10%Mn master alloy, Mg-30%Ca master alloy, Mg-30%Gd master alloy and tin Ingot, and preheat each raw material at 150°C for 3h;

[0032] (2) Melting: preheat the crucible to 600°C and sprinkle RJ-2 flux, then put magnesium ingots into the crucible for melting, and add zinc ingots, tin ingots and Mg-10%Mn master alloy after heating up to 730°C After alloying and stirring for 10 minutes, heat up to 760°C, add Mg-30% Gd master alloy and Mg-30% Ca master alloy, alloy and stir again for 10 minutes, refine with refining agent, ref...

Embodiment 3

[0036] A magnesium alloy for cold stamping and stamping, the magnesium alloy is composed of the following components in terms of mass percentage: Zn 2.0%; Mn 1.4%; Ca 1.0%; Gd 2.0%; Sn 0.5%; unavoidable impurities ≤0.2%; the balance is magnesium. The preparation method of this magnesium alloy is as follows:

[0037] (1) Ingredients: according to the mass percent of each component in the above-mentioned magnesium alloy, take magnesium ingot, zinc ingot, Mg-10%Mn master alloy, pure calcium, Mg-30%Gd master alloy and tin ingot, and each The raw material is preheated at 350°C for 1 hour;

[0038] (2) Melting: Preheat the crucible to 450°C and sprinkle RJ-2 flux, then put magnesium ingots into the crucible for melting, and add zinc ingots, tin ingots and Mg-10%Mn master alloy after heating up to 710°C After alloying and stirring for 20 minutes, heat up to 740°C, add Mg-30% Gd intermediate alloy and pure calcium, alloy and stir again for 20 minutes, refine with refining agent, ref...

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