The hub of magnesium alloy is non-extruded, and most of them are gravity die-casting or sand-turning metal mold casting, and then NC cutting.
2.
As for the extrusion technology of magnesium alloy, it is very mature at present. However, it is difficult to extrude magnesium alloy into ultra-thin wall if it is to be extruded into thin wall similar to aluminum alloy.
3.
At present, magnesium alloys can not be widely used. Another key point is that the surface treatment of magnesium alloy can not be completed like that of aluminum alloy, and the cost is relatively high. Generally, people with magnesium alloy surface treatment technology will not spread these technologies easily, but as far as I know, there are many manufacturers with magnesium alloy surface treatment technology, and most of them are bragging. Maybe we can make a sample, but few of them can really be mass-produced, such as Yang XX in Kunshan and He in Shenzhen.
4.
Personally, I have been to various magnesium alloy factories abroad, and the magnesium alloy technology abroad is the same. Whether it is die casting or extrusion, there is nothing special or special. Only foreign countries dare to spend money to make magnesium alloys, while China dare not spend money to make more beautiful or advanced parts, because most of them are foundries, which also limits the development of magnesium alloy industry in China.