Preparation of Ag-WC-C contacts needs to use tungsten carbide powder and other powder as its raw material; the following is part knowledge of tungsten carbide powder.

Cubic WC1-X is used to represents W - C is a non-stoichiometric composition;
What represent W-C stoichiometric composition are: the hexagonal WC, the hexagonal W2C. At room temperature, only the Six-Party WC is stable.
The hexagonal WC cell structure is staggered triangular prismatic shape, which is Non-Centro symmetric structure, its lattice constant a = 2.916 × 10-10m (hexagonal, a = b), c = 2.844 × 10-10m. Nowadays, the main appliance of tungsten carbide is used to manufacture high-quality carbide, and it can also be used in contact material, metal coating, metal ceramics and other fields.

The lattice constant also known as the lattice parameters, referring to the length of a side of the unit cell, which have a direct contact with the combination of atoms, and it is an important basic parameters of the crystal structure, whose change may reflect changes of the composition in the crystal and status of the force.
Studies have shown that the mechanical property of tungsten carbide is not only related to its composition but the sintering process, and is also closely related to its microscopic crystalline structure. Currently, the preparations methods of tungsten carbide powder methods are:
(1) Tungsten powder is first prepared, and then adds carbon to make it carbonized to obtain tungsten carbide powder;
(2) Preparation of tungsten carbide powder from tungsten carbide compound.

However, both methods have common drawback is that both need a high carbonization temperature (1300 ~ 2000 ℃), the preparation process is complex, and it is costly, what is more, tungsten carbide prepared by this way is usually near-spherical. Using this kind of tungsten carbide powder to prepare plate-like strengthening tungsten carbide powder, there is a need to adopt a special sintering process to make the WC grain growth into a plate, and its orientation is not ideal.

 

Tungsten Metals Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten.com.cn
 Tel.: 86 592 5129696; Fax: 86 592 5129797
 Email: sales@chinatungsten.com
 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

Sharpening tungsten darts is a slight misnomer. You do not actually want your dart tips sharp and pointy, but rather rounded and smooth. This prevents darts from bouncing off the wires on your board, maintains a strong dart tip and protects your board. However, you do need to use a dart sharpening stone on your darts when they become flat or develop burrs. Sharpen your darts to take out any burrs that may occur and keep the darts rounded and smooth. So let’s learn how to sharpen your tungsten darts!

Instructions:

Check your dart tips for burrs. Run a nail up and down each dart tip and feel for abrasive burrs. If burrs exist, you'll need to sharpen.

Lay the steel tip in the concave section of the sharpening stone.

Slowly rotate the tip on the stone.

Check the tip to make sure that all burrs have been ground out. The tip should be smooth.

Dull the very tip of the tungsten dart. If you have sharpened the dart to a point, round it out slightly by holding the dart vertically and pressing the tip against the sharpening stone. Spin the dart in a circular motion until the tip is rounded.

  Tungsten Dart Manufacturer & Supplier: Chinatungsten Online - http://www.chinadart.com/
  Tel.: 86 592 5129696; Fax: 86 592 5129797
  Email:  sales@chinatungsten.com
  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

The flights on your tungsten darts are the most vulnerable part, and because of that they will need to be replace often. Let’s learn how to replace tungsten dart flight!

Instructions:

Choose your dart flights. Standard dart flights are pretty wide, which effects the movement of the dart. They straighten the dart out in the air, which makes them good beginner flights. They are also good for people who like to lob their darts rather than throw them straight with a lot of force. Narrower flights are good for short shaft darts and for aggressive throwers. Check the reference below for more info on dart flights.

Pull the old flight straight out of the shaft of your dart. You can save it in your dart case as a spare, or simply throw it out.

Inspect the dart shaft. If it is cracked or bent in any way, unscrew it and screw in a new shaft. Plastic shafts go bad all the time, and a new flight won't help your game if it is wobbling around in an old shaft.

Gently bend the new flight so that the planes are at right angles to each other. The flight should form two flat, intersecting planes for a total of four fins.

line up the flight with the slits on the back of the shaft. Gently push the flight into the shaft until it is all the way in.

  Tungsten Dart Manufacturer & Supplier: Chinatungsten Online - http://www.chinadart.com/
  Tel.: 86 592 5129696; Fax: 86 592 5129797
  Email:  sales@chinatungsten.com
  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

Starting a simple to run tungsten dart league can be challenging, but it can be easy if you use the proper tools. Running a tungsten dart league requires dedication every week. Tungsten dart leagues usually run for twenty-six weeks for the winter league and ten weeks for the summer league. The organizer will need to keep money deposits, score records and print out weekly leader board sheets to be delivered to each team sponsor. The amount of time spent will be determined by the amount of teams as well as how many nights a week you run the league play. Steps of starting a tungsten dart league are as following:

1.Set up an excel spreadsheet with all the teams names. The spreadsheet will have a category for the team name, wins, losses, games played, percent of wins and forfeits. Another spreadsheet will have every individual player listed with the team name, the points per dart average, then categories for six, seven, eight and nine dart out rounds. The spreadsheet also needs a column for wins, loses, hat tricks and assisted wins.

2.Set up a twenty-six or ten week schedule that says where each team plays each week. The schedules are set up so that every team plays a different team every week and then it starts the cycle over again until the season is finished. If there are an uneven number of teams, there will be a bye week.

3.Every week the visiting team to the home team will drop off the score sheet with the money from the game for that given week. The money goes to the bank for the end of the year party and prizes.

4.Enter all the information from the score sheets into the excel spreadsheets accordingly. Once this is done, the organizer will make a team standing sheet or leader board sheet that is given to each sponsoring establishment to post.

5.Steps 3 and 4 are repeated every week until the season ends.

6.At the end of the season, a bust up party is planned where food and drinks are served by using the money that was taken in during the season. This is where prizes are given out for first, second, third and forth place teams. The individual players also get a prize for best shooter and the most wins. Teams are also given a sum of money for the number of wins.

  Tungsten Dart Manufacturer & Supplier: Chinatungsten Online - http://www.chinadart.com/
  Tel.: 86 592 5129696; Fax: 86 592 5129797
  Email:  sales@chinatungsten.com
  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