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pysong
Joined: 02 Feb 2023
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Posted: 2023-07-24 07:11
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WHAT ARE THE DIFFERENT TYPES OF METAL EXTRUSION PROCESSES?
Extrusion is one of the most important techniques used in metal fabrication. Although the processes may vary across various types of metal extrusion processes, the idea remains relatively consistent throughout each method. It starts by choosing a billet that is made out of different types of metals or alloys — be it magnesium, steel, copper, or aluminum. The billet is then subject to high temperatures in order to “soften” it before it becomes malleable enough to be forced through the opening of a die. This die features cross-sections that eventually shape the material before it’s ejected from the extruding machine.Get more news about
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Cold Extrusion
Unlike what has been mentioned before about the typical extrusion method, the cold extrusion does not begin with heating an alloy or metal specimen to the ideal temperature. Instead, manufacturers will work with a specimen in room temperature environments or an environment with only minimal heating.
In a cold extrusion machine, the specimen will be pushed through the opening of a die with the help of a consistently applied pressure — this is typically done with the assistance of a metal punch. In order to ensure that the shape of the resulting material stays consistent throughout this method, the die is stably fixed to the machine to avoid any deformations on the product.
Metals that are commonly cold extruded can be steel, aluminum, lead, or tin. Unlike other types that you’ll learn more about in this list, cold extrusion does not result in any oxidation on the metal/alloy, giving it a number of enhanced physical and mechanical attributes.
Hot Extrusion
As the name suggests, hot extrusion involves the heating of a chosen billet specimen before it is applied pressure in order to follow the cross-sections of the die. Although there are different metals and alloys that can be used in this process, it’s more commonly associated with steel material in coming up with durable profiles.
Typically, hot extrusion is conducted under temperatures that are beyond the recrystallization temperature of the given material. Simply put, this is the temperature at which modifications can be done on it, as the material becomes more ductile and flexible this way. For example, the recrystallization temperature for steel would range from 400 to 700 °C. Any hot extrusion process that will have to be performed should be above this range.
Micro Extrusion
Micro extrusion is one of the newer and more lately-developed forms of this process. Compared to the previous techniques, micro extrusion focuses more on the mass production of metal parts that have small measurements. With this in mind, the end-products can be used for distribution, not for structural applications, but for uses that require high precision.
The most distinct features of micro extrusion are the 1-millimeterDifferent Types of Metal Extrusion Processes-sized cross-sections of the die. This allows manufacturers to come up with miniature products such as micro-pins, stents, small tubes, catheters, and many more. These products are widely used in the medical field, as the less than, or equal to 1-millimeter designs are ideal for any implant-related operations. More than that, micro extrusion is also beneficial for high-capacity productions for cost-efficient, and short lead times.
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