CN102400024A - Magnesium alloy for electric bicycle instrument panel shell - Google Patents

Abstract

The invention discloses a magnesium alloy for an instrument panel shell of an electric bicycle, which comprises the following components in percentage by weight: 2.5 to 3.8% of Al, 0.8 to 1.5% of Si, 0.3 to 0.5% of Ce, 0.8 to 1.2% of Cu, 0.1 to 0.4% of Ti, and the balance of Mg and inevitable impurities.

Description

Magnesium alloy for electric bicycle instrument panel shell

technical field

The invention relates to the field of electric bicycles, in particular to a magnesium alloy for an electric bicycle instrument panel shell.

Background technique

With the shortage of energy, the quickening pace of people's life and the increasingly serious congestion problem in cities, electric bicycles are becoming more and more popular. Its speed is faster than ordinary bicycles, it is more flexible to use than automobiles, and it can adapt to a wider range of roads. Therefore, it has become an important means of transportation for people to travel.

Metal magnesium and its alloys are the lightest structural metal materials used in engineering so far. Magnesium alloys characterized by light weight, good rigidity, good metallic luster, good electromagnetic shielding and easy recycling, instrument panels, electronics, communications The preferred material for shells in other industries. At present, magnesium alloy products are obtained by casting methods. The disadvantages are that the yield is low, the product has more holes and looseness, low strength, poor ductility, and cannot meet the higher requirements of the product. Performance, Moreover, the casting itself cannot meet the requirements of use because the wall thickness of the casting itself cannot be too thin due to the technical requirements.

Sheet metal deep drawing has significant advantages in improving product quality, productivity, and saving materials, and can process thin-walled parts that cannot be processed by casting. For general metals and their alloys, deep drawing is a very mature technology, but for magnesium alloys, the history of deep drawing is relatively short. Mainly due to the close-packed hexagonal crystal structure of metal magnesium, the plastic formability of most magnesium alloys at room temperature is very poor. Raising the forming temperature will effectively improve its formability, usually in the temperature range of 250-400°C Processing and forming will bring the disadvantages of relatively complex mold system, and the cost of the product is also relatively expensive, and when the heating time is too long, it is easy to cause coarse grains inside the plate, which will seriously reduce the plastic deformation ability of the plate. At this time, the blank is very brittle, and it is very easy to crack at the rounded corner of the punch during deep drawing. In addition, magnesium alloys are significantly sensitive to deformation speed, and forming speed and lubrication process are also important process parameters for plastic deformation of magnesium alloys.

At the same time, since electric bicycles are exposed to outdoor use for a long time, they are different from ordinary electronic products such as notebooks and mobile phones. Therefore, magnesium alloys suitable for ordinary electronic products cannot be applied to the working conditions of electric bicycles.

Therefore, there is an urgent need to develop a magnesium alloy specially suitable for electric bicycle instrument panel housings.

Contents of the invention

In view of the deficiencies in the prior art, one of the objectives of the present invention is to provide a magnesium alloy for the electric bicycle instrument panel shell.

To achieve the above object, the technical scheme adopted in the present invention is as follows:

A magnesium alloy for the instrument panel shell of an electric bicycle, the magnesium alloy is composed of the following components in terms of weight percentage: 2.5-3.8% of Al, 0.8-1.5% of Si, 0.3-0.5% of Ce, 0.8-1.2% % Cu, 0.1-0.4% Ti and the balance Mg and unavoidable impurities.

Preferably, the magnesium alloy is composed of the following components in weight percentage: 2.8-3.5% of Al, 1.0-1.2% of Si, 0.35-0.45% of Ce, 0.9-1.1% of Cu, 0.2-0.3% of Ti And the balance of Mg and unavoidable impurities.

Most preferably, the magnesium alloy consists of the following components in weight percent: 3.2% Al, 1.1% Si, 0.40% Ce, 1.1% Cu, 0.25% Ti and the balance of Mg and the inevitable Impurities.

The beneficial effect of preparation method of the present invention is:

The invention adjusts the alloying elements of the magnesium alloy so that the alloy has an excellent surface quality and is suitable for preparing electric bicycle instrument panel shells; the finished product has excellent mechanical properties, the tensile strength reaches 280-320MPa, and the elongation reaches 8-10%. The ear rate decreased to 1-3%, and the average strain ratio reached 1.2-1.6.

Detailed ways

Embodiment one

A magnesium alloy for the instrument panel shell of an electric bicycle, the magnesium alloy is composed of the following components in weight percentage: 2.5% Al, 1.5% Si, 0.3% Ce, 1.2% Cu, 0.1% Ti And the balance of Mg and unavoidable impurities.

Embodiment two

A magnesium alloy for the instrument panel shell of an electric bicycle, the magnesium alloy is composed of the following components in weight percentage: 3.8% Al, 0.8% Si, 0.5% Ce, 0.8% Cu, 0.4% Ti And the balance of Mg and unavoidable impurities.

Embodiment Three

A magnesium alloy for the instrument panel shell of an electric bicycle, the magnesium alloy is composed of the following components in weight percentage: 2.8% Al, 1.2% Si, 0.35% Ce, 1.1% Cu, 0.2% Ti And the balance of Mg and unavoidable impurities.

Embodiment four

A magnesium alloy for the instrument panel shell of an electric bicycle, the magnesium alloy is composed of the following components in terms of weight percentage: 3.5% Al, 1.0% Si, 0.45% Ce, 0.9% Cu, 0.3% Ti And the balance of Mg and unavoidable impurities.

Embodiment five

A magnesium alloy for the instrument panel shell of an electric bicycle, the magnesium alloy is composed of the following components in weight percentage: 3.2% Al, 1.1% Si, 0.40% Ce, 1.1% Cu, 0.25% Ti And the balance of Mg and unavoidable impurities.

The applicant declares that the present invention illustrates the detailed process equipment and process flow of the present invention through the above-mentioned examples, but the present invention is not limited to the above-mentioned detailed process equipment and process flow, that is, it does not mean that the present invention must rely on the above-mentioned detailed process equipment and process flow process can be implemented. Those skilled in the art should understand that any improvement of the present invention, the equivalent replacement of each raw material of the product of the present invention, the addition of auxiliary components, the selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

Claims (3)

1. an electric bicycle panel board housing is used magnesiumalloy; It is characterized in that said magnesiumalloy is made up of following component by weight percentage: 2.5～3.8% Al, 0.8～1.5% Si, 0.3～0.5% Ce, 0.8～1.2% Cu, 0.1～0.4% Ti and the Mg and the unavoidable impurities of surplus.

2. a kind of electric bicycle panel board housing as claimed in claim 1 is used magnesiumalloy; It is characterized in that said magnesiumalloy is made up of following component by weight percentage: 2.8～3.5% Al, 1.0～1.2% Si, 0.35～0.45% Ce, 0.9～1.1% Cu, 0.2～0.3% Ti and the Mg and the unavoidable impurities of surplus.

3. a kind of electric bicycle panel board housing as claimed in claim 2 is used magnesiumalloy; It is characterized in that said magnesiumalloy is made up of following component by weight percentage: 3.2% Al, 1.1% Si, 0.40% Ce, 1.1% Cu, 0.25% Ti and the Mg and the unavoidable impurities of surplus.