Why can molybdenum wire cut metal?
Many people have heard of wire cutting, and molybdenum wire cutting is also a type of wire cutting. So why can molybdenum wire cut metal? Many people may think that molybdenum wire cutting is cutting metal with molybdenum wire, just like cutting wood with a saw. In fact, this is not the case. So in this article, we will try to find out why molybdenum wire can cut metal. But first, let's understand what molybdenum and molybdenum wire are.
What are molybdenum and molybdenum wire?
Molybdenum is a silver-white refractory metal. In appearance, the metal molybdenum is very similar to tungsten, but it is still easy to distinguish them by density. Molybdenum is only half as dense as tungsten.
Molybdenum is a rare metal on the earth, closely related to our lives and widely used. For example, molybdenum is a strategic metal used in the defense industry, an important component of steel alloys, and an important nutrient required by plants and animals. Due to its extremely strong interatomic bonding force, it has high strength at room temperature and high temperature.
Molybdenum wire is a metal wire with a diameter between 0.02 mm and 0.2 mm made of molybdenum as the main component (more than 99%). It has a tough texture and high tensile strength and is mainly used for cutting workpieces in industry. Molybdenum wire has high precision, low wire breakage rate and fast processing speed, which can achieve stable and long-term continuous processing. Molybdenum wire can not only process various metals, but is also widely used in leads, heating elements, etc.
How molybdenum wire cutting works
Although molybdenum wire has many excellent properties, it is not wear-resistant and therefore cannot be used to cut metal like a saw. The principle of molybdenum wire cutting is to energize the molybdenum wire and discharge the workpiece, instantly generating a high temperature of thousands of degrees, causing the discharged part of the workpiece to melt or vaporize, thereby achieving cutting.
When cutting the workpiece, the molybdenum wire also needs to be immersed in the insulating liquid. And the discharge during the cutting process is pulse discharge. Under the action of pulse voltage, the insulating liquid is broken down, forming an instant discharge channel between the molybdenum wire and the workpiece. During the pulse interval, the insulating liquid fills the discharge channel again, and so on. In addition, the insulating liquid also has the function of eliminating electrical corrosion products in the gap and cooling the electrodes.