Do You Know About Machining Tungsten?

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We know that tungsten has many valuable properties, such as extremely high melting point, low vapor pressure, low expansion and dimensional stability at high temperatures, excellent high-temperature mechanical properties and special electrical properties. It is these valuable properties of tungsten that make Tungsten has become a basic material in today’s high technology, an indispensable material in national defense construction and a material closely related to the quality of people’s lives. Therefore, tungsten has an important position and role in the national economy.

China is the world’s largest resource of tungsten, and it is also the largest producer of tungsten steel in the world. According to statistics from the Tungsten Carbide Association in 2003, the actual output of tungsten products reached about 2570 tons, accounting for 15%-16% of domestic tungsten product consumption. , Which shows that China’s machining tungsten has made considerable progress. At present, the proportion of tungsten products is relatively small, accounting for only 15%-16% of domestic tungsten consumption and about 13.9% of total tungsten exports, including machining tungsten alloy. Therefore, the proportion of high-tech, high value-added and tungsten application products is even smaller. This shows that China's tungsten deep processing links are still relatively weak and there is still a lot of room for development. Therefore, the development of tungsten products, especially tungsten materials The deep-processed products and technology of the company are of special significance to promote the development of China’s tungsten metal industry.

Let's talk about the processing flow and deep processing of tungsten metal first. You can see that this picture shows the processing flow of tungsten. This flow has three links. From the left, it is a product or tungsten product firing link. The link is the tungsten processing link, and the third link is the tungsten processing material product link. From the first link:

APT is reduced to powder, the first time it is formed, tungsten powder is sintered to obtain different tungsten blanks, and sintered to obtain different tungsten products. This is a very important link. In other words, one of the tungsten products is very important. The big link is here, and the required products are obtained through sintering. The link is the processing link, through different sintering tungsten carbide blank, carbide strip, tungsten plate, tungsten bar and tungsten carbide tube through different processing The required processing material is obtained by the method, where the noodle blank is stretched to obtain each carbide rod, and the bar is processed by wire drawing dies to obtain the tungsten wire. This is the link of the rod.

You can see that the tungsten carbide plate is rolled by foil, hot rolled, cold rolled and foil rolled to obtain slabs and plates. The third is that the tube is rolled or spinning to obtain the tube. This is the tube link. So this part is the process of processing materials. After the last process, various processed materials are deeply processed into products. This is also the second link of tungsten products.

What I'm talking about today is the last link, which is how to turn the raw material into a product. From the above we can see that there are two categories of tungsten products, one is tungsten carbide sintered product, and the other is machining tungsten carbide. Product, this picture shows the whole process of tungsten products from tungsten carbide powder through compression molding to low temperature sintering in atmosphere to final deep processing into tungsten carbide tools.

Sintering Process of Tungsten Carbide Products

The focus of this report is mainly on the deep processing technology of tungsten products, that is to say, the technology of transforming processed materials, carbide plates, carbide strips, carbide rod, carbide bars, carbide wires, carbide pipes, etc., obtained from deformation processing into parts or components. See, what are the technologies and content of the deep processing of tungsten materials?

First, the forming process involves bending different tungsten materials into various shapes. This is the forming process, including cold forming, hot forming, high temperature forming, and so on.

Second, machining, as well as joining, including welding and other aspects, as well as surface treatment. Through the integration of the above several technologies, tungsten processing materials can be turned into required components or components for use.

Let's take an example. The heating element of the tungsten carbide plate is actually a synthesis of the above technologies. For example, if we want to shape the tungsten plate, we need to form a shape, and we need forming technology. Tungsten and tungsten must be welded together. Inside is a welding technology. To make tungsten into this shape, it needs to be cut by electric spark. So it is a product of various technologies. This drawing also reflects the technology of tungsten for heating elements. In addition to electrochemical cutting technology and In addition to the sheet forming technology, a tungsten wire mesh weaving technology is also added. The tungsten wire mesh weaving technology must be connected to the power source. It is necessary to weld the tungsten wire mesh and the electrical connection claws together by welding technology to form the entire tungsten The heating element of the wire mesh, this heating element is currently the highest component of the metal, so these things are a combination of different technologies.

Let’s talk about the main technology and analysis of the deep processing of tungsten materials. Let’s look at the forming and processing technology mentioned above. Tungsten products need to solve two major problems.

First, the performance issues of materials, such as stress fracture, creep fatigue and other properties, are issues in material development.

Second, material processing and forming technology. This is the topic we are going to talk about today. When we talk about tungsten forming, first of all we have to talk about the processing curve of tungsten forming. This curve reflects the ductility, brittleness transition temperature and High-performance curve of recrystallization temperature, deformation temperature of punching and bending, and thickness of tungsten plate.

Now let’s talk about the main technology and analysis of the deep processing of tungsten materials. Let’s look at the tungsten carbide forming and processing technology mentioned above. Tungsten products need to solve two major problems.

First, the performance issues of materials, such as stress fracture, creep fatigue and other properties, are issues in material development.

Second, the processing and forming technology of tungsten carbide materials. This is the topic we are going to talk about today. When we talk about tungsten forming, we must first talk about the processing curve of tungsten forming. This curve reflects the transition of tungsten ductility and brittleness. High-performance curves of temperature, recrystallization temperature, deformation temperature such as punching and bending, and thickness of tungsten plate.

Do You Know About Machining Tungsten?