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Time:2022-10-07 13:58:28 Views:
Aluminum and magnesium alloys
The title of aluminum alloy is not quite accurate, because there are nearly ten categories of aluminum alloy and thousands of formulas, that, the notebook most used is what kind of aluminum alloy? Whether it is a stamping aluminum shell or an integrated aluminum shell, most the aluminum-magnesium alloy, that is, in the aluminum to add about 5% magnesium composition, and content of less than 1% chromium, iron, silicon, copper, zinc, and other materials, such aluminum magnesium alloy is also classified as rust aluminum alloy, can not be processed with exterior decoration.
Aluminum magnesium alloy in the chemical stability of the performance is quite good, at the same time, rich in metallic luster, appearance is quite attractive, but also easy to later cutting, draw and other processing, coupled with a reasonable price, this lets most notebook manufacturers for use.
Magnesium alloy
Yes, you read that right, there is also a material called magnesium alloy. Different from aluminum and magnesium alloys with aluminum composition up to 90%, magnesium is used as the base material in magnesium and aluminum alloys, such as AZ91D alloy, which has magnesium content up to 90%, aluminum 9%, zinc 1%, plus a very small amount of manganese, silicon, iron, and other metal alloys.
With magnesium as the base material, the density of the alloy is greatly reduced to only 1.8g/ cubic centimeter. But the strength is similar to aluminum magnesium alloy performance, which makes the shell weight greatly reduced. However, in the magnesium-aluminum alloy, the appearance of the texture is slightly poor, and gray, coupled with the lack of magnesium ductility, so most manufacturers use casting molding processing and then surface spray painting, or the use of a skin-friendly coating to improve the texture.
Magnesium lithium alloy
Lithium, after all, is a floating metal with a density of only 0.5 grams per cubic centimeter. Adding 40% lithium to magnesium produces an ultra-light metal with a density of just 1.36g/ cubic centimeter, about the same weight as aluminum and magnesium alloys. In this way, the light casing weight can be reduced by hundreds of grams.
Of course, the addition of lithium, also lets the shell cost increase several times, coupled with magnesium-lithium alloy processing difficulties, the magnesium-lithium alloy shell also needs to carry out the corresponding decoration treatment, want to popularize the difficulty is a little high.
Du pull aluminum
Don't think THIS is a new material DURa aluminum has been developed as early as 1903 and is the first batch of aluminum alloy material products, it is made up of more than 90% aluminum, about 4% copper, and a small amount of magnesium and strong alloy composition.
At the beginning of its birth, Dura aluminum was made for aircraft and airships. After adding copper, DURa aluminum has a certain increase in strength and hardness, which also allows the thickness of the shell to be reduced. Thanks to this feature, the Samsung 9 series has set a record for the thinnest notebook. However, after the addition of copper, the corrosion resistance of the alloy surface is also worse, so the Dura aluminum must also be decorated.
Titanium alloy
This has gone on for many years, but there are still many people who think titanium alloy is the top laptop shell material, in which the POWER BOOK G4 using titanium alloy titanium content as high as 95%, plus a small number of other metal elements, which makes it have excellent high strength, the Mohs hardness second only to diamond, coupled with excellent corrosion resistance, Purely in terms of strength performance, titanium alloys are excellent.
However, titanium alloy is not only extremely expensive, and its 4.5g/ cubic centimeter density is also relatively high, coupled with titanium alloy in cold treatment, not only easy to damage treatment equipment, alloy strength will be greatly reduced. So the titanium notebook will be a flash in the pan, devoid of history.
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