It requires that electrode materials should have good mechanical strength (not be out of shape after stamping), good thermostability (not be out of shape after welding), excellent thermal conductivity (not be easily heat by current) and can not be combined with the welded material (simply not be stick with the welded material). Therefore, tungsten copper could meet a criterion above. In addition, there are some description and rules in the standard of Japanese copper alloy electrode (JIS Z 3234-1999).

2. EDM Electrode

EDM (Electrical Discharge Machining) is also called as discharge machining or electric corrosion machining, which uses pulse discharging between electrodes. The principle is that the electrode and the work-piece used as two poles and put the liquid in the gap of discharge, the pulse voltage will puncture the liquid when the distance decreasing.

More information about tungsten copper electrode types, click here:

http://news.chinatungsten.com/en/tungsten-information/79114-ti-10084

Tungsten Copper Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-copper.com/
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten matrix pellet is a collective term for small balls or pellets, often made of Tungsten, these were the original projectiles for shotguns and are still fired primarily from shotguns, although shot shells are available in many pistol calibers in a configuration called "bird shot" or "rat-shot", lead shot is also used for a variety of other purposes such as filling cavities with dense material for weight or balance, some versions may be plated with other metals, lead shot was originally made by pouring molten lead through screens into water, forming what was known as "swan shot", and, later, more economically mass-produced at higher quality using a shot tower, the method has supplanted the shot tower method since the early 1960s.

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

According to applications, tungsten copper electrode can be specifically divided into resistance welding electrode, EDM electrode and the electrode of high pressure discharge tube, etc.

1 .Resistance Welding Electrode

Resistance welding electrode is using thermal resistance for welding, which is produced by the pressure of electrode and current run through contact area or close area. It takes advantage of the thermal resistance to melt or model the work-piece and combined it with metal. Resistance welding can be also divided into four types, such as spot weld, caulk weld, beading weld and butt weld. The material of electrode plays a significant role in resistance welding, which can press the welding parts, supply great amount of current and promote the welding area cool down and so on.
















Tungsten Copper Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-copper.com/
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

In the first part, it is shown that there are many types of tungsten carbide end mills, such as back corner rounding end mills, ball end mills, etc., and here we list these types with their respective diagrams so that the beginners are easy to learn about them. And here this part we will go on showing more diagrams of tungsten carbide end mills.

(To be continued. This article is divided into several parts and this is part 2, for part 1 please refer to:http://news.chinatungsten.com/en/tungsten-information/79092-ti-10094)

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

There are many types of tungsten carbide end mills, such as back corner rounding end mills, ball end mills, etc., and here we list these types with their respective diagrams so that the beginners are easy to learn about them.

(To be continued. This article is divided into several parts and this is part 1, for part 2 please refer to:http://news.chinatungsten.com/en/tungsten-information/79096-ti-10095) 

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Challenge tungsten dart ladder is yet another type of tungsten dart ladder. It is organized and played the same way with the following exception, players challenge their opponents to a match as opposed to one playing two, three playing four, etc. You can challenge either of the two people immediately above you (the person in 5th place can challenge either the person in 4th or the person in 3rd, nobody else). If you win, you take their position. If you lose, you stay where you are. You do not keep track of the number of wins each player has but all players must play one match/week. Once a player has been challenged, he/she can not challenge anyone else for that week. So it's first come, first serve. Get your challenge in as soon as possible so that you will have a chance to move up, instead of having to play to hold the position you're already holding. This can get a bit confusing and you can alter the rules in any fashion you deem necessary. One way to make this clearer is to let the lowest ranking person challenge first, then continue to work up the tungsten dart ladder until everyone has a match to play.

  Tungsten Dart Manufacturer & Supplier: Chinatungsten Online - http://www.chinadart.com/
  Tel.: 86 592 5129696; Fax: 86 592 5129797
  Email:  This email address is being protected from spambots. You need JavaScript enabled to view it.
  Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
  Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
  Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Tungsten copper electrode is kind of composite metal material and is composed of high purity tungsten powder and good conductivity Cu powder through isostatic pressing and high temperature sintering. Therefore, tungsten copper electrode not only has high melting point(3410℃) and high density (19.34 g/cm³) of W, but also has good conductivity and other advantages of Cu.
 

In addition, tungsten copper has good thermal resistance, high thermal conductivity and low expansion, which can be partly used in resistance welding or electrical contacts. EDM and EDM is the most widely used tungsten copper as electrodes.

Tungsten Copper Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-copper.com/
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

Due to the high thermal conductivity of Cu, and the better spark erosion resistance, low thermal expansion coefficient and high melting temperature of W, copper-tungsten electrodes have been widely used for machining die steel and tungsten carbide work-piece. The materials normally used in EDM electrodes are various types of copper, graphite, tungsten, brass and silver. But copper-tungsten has better properties. The low melting point of Cu reduces the resistance to electrode wear.

At high tungsten content, there is porosity in the liquid phase sintered electrode due to the insolubility between the Cu and W. This greatly impedes densification during the solution-reprecipitation stage of liquid phase sintering. Hence, this makes it necessary to introduce another material with high melting point. Materials having good electrical and thermal conductivity with a high melting point are used preferably in copper-based electrodes to resist electrode shape-loss.









Tungsten Copper Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-copper.com/
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn

In World War II, projectiles made from tungsten alloys helped Allied forces achieve victory. Today, high-density tungsten alloys are still proving their worth in army applications around the world. The uncompromising strength found in tungsten alloys allows it to offer the highest quality in hyper-velocity, armor-penetrating applications, fragmentation devices and kinetic energy penetrators (in spheres, cubes and projectile shapes).

Tungsten has the highest melting point among all melts. The prominent advantage of high melting point is it produces materials with good high temperature strength and corrosion-resistance, which shows its excellent properties in army industry, especially in ordnance components manufacturing. With powder preprocessing technique and large deformation enhancement technique, tungsten alloys are refined to grains to increase the durability and penetrating force of materials.

There are some typical products made from tungsten:

Balanced ball for missile and plane

Core for armor-piercing shell

Tungsten alloy cluster bomb

Tungsten alloy gyro-rotor for airplane

Bullet of grenade

Tungsten Manufacturer & Supplier: Chinatungsten Online - http://www.chinatungsten.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn
 

In last part we read The type of tungsten carbide bur shank FG long has the same diameter as a standard friction grip bur but the length is longer and used for high speed hand pieces, while type FG surgical has similar feature but is used when a longer length and better visibility are required.. Here we describe types “RA”, “RA surgical” and “HP”.

(the END. This article is divided into 3 parts and this is part 3, for part 2 please refer to: http://news.chinatungsten.com/en/tungsten-information/79027-ti-10080)

Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.com.cn
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email:This email address is being protected from spambots. You need JavaScript enabled to view it.
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn