High-density tungsten alloy shielding is extremely strong and durable (typical hardness ranges from 24-32 RC), yet easy to work with. (They machine much like gray cast iron.) Tungsten alloy’s low-thermal expansion rate and resistance to breakage and chipping allow you to achieve very close tolerances and hold fine finishes.

There are some main machining technologies for tungsten alloy shielding:

• Turning: Positive rake tooling is suggested.  Triangle inserts TPG432 or TPG431 grade 883.
• Drilling: Carbide tooling is suggested. Increased clearance angles and automatic feeds are often used to avoid binding and seizing. Carbide drills will give a better tool life.
• Milling: Premium uncoated end mills with a regular spiral such as SGS. Insert cutters; use square multi-edge or single edge cutters, such as KC730. Also can use positive rake octagon cutters, such as Seco grade 883.
• Sawing or Cutting: When sawing, use a bi-metal blade; blade pitch should be relative to the thickness of the material. Material can also be cut using high-speed abrasive cutoff wheels.
• Stress Relieving: Stress relieving can be accomplished on machined parts. We suggest heating at 600°F in air for two hours and cool in air or in a protective atmosphere at 900°F for 30 minutes.

  Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online- http://www.tungsten-alloy.com
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Soccer tungsten dart rule is a game for two players or teams only. It is a very difficult game but is great practice because only bulls-eyes and doubles count.

The Object: To be the first player to score ten "goals".

The Scoring: No scoring is needed if you can simply remember each player’s points from one to ten.

The Play: One player from each team throws one tungsten dart at bulls-eye, closest to the bulls-eye goes first.

In order to score a "goal", the players first must "take possession of the ball". To take possession, you must hit a bulls-eye (either a single or a double, it does not matter). Once you have possession, you keep the ball until the other player/team takes possession by hitting a bulls-eye.

Only the player/team that has possession of the ball may score goals. To score a goal you must hit any double on the board. The doubles are the thin outer ring and the inner-bulls-eye. Any double you hit anywhere on the board counts as one goal and scores one point for you or your team.

Strategy: There isn't any.

  Tungsten Dart Manufacturer & Supplier: Chinatungsten Online - http://www.chinadart.com/
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Whether you need to protect sensitive electronic equipment or delicate human tissue, the energy-absorbing properties of tungsten alloys make them exceptional choices for radiation shielding applications, in both medical and industrial settings.

Tungsten alloys are used for radioactive source containers, gamma radiography, shields, and source holders for oil-well, logging, and industrial instrumentation. Those high-density alloys also serve as collimators and radiation shielding in cancer therapy, as well as syringe protection for radioactive injections. When you need to direct a specific amount of radiation to a targeted area, tungsten alloys provide the control you need. Tungsten alloys will continue to perform, even under extreme, high-heat conditions.

Compared to traditional radiation shielding materials, tungsten alloys provide excellent value. It is a high-density alloy can provide the same energy absorption as lead using 1/3 less material! Unlike lead, you’ll also reduce administration costs by eliminating the need to obtain special licensing—it’s not required.

  Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online- http://www.tungsten-alloy.com
  Tel.: 86 592 5129696; Fax: 86 592 5129797
  Email:  sales@chinatungsten.com
  Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
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Here are two practice guidelines for tungsten darts should incorporate the following:

Focus on your weaknesses. You know where you are weak. If not, pay attention to what happened to you the next time you lose. Did you take too long to close out your ’01 game? Did you choke on your out shot? Whatever your weakness, choose practice games that help you. Click here for a list of great practice games. For example, the game of 21 is great for Cricket practice. If you need work on your outs, try a game called 170. You need 170 points to finish and you count the number of tungsten darts to do it. The fewer the tungsten darts the more points you get. It starts with a three tungsten dart finish worth five points and decreases by one point for each additional tungsten dart, including negative points. The first one to close out 170 stops the round. The first one to 15 points wins the practice session.

Change things up & keep track of your progress. Let’s face it, practicing can get boring. The excitement of a match is what makes the tungsten dart game so intriguing. You can help stop practice from being a chore by changing your surroundings. Maybe you could practice where you just had a close match? Or go to a friend’s house to practice. Another great idea is to throw at a popular tungsten dart bar and challenge one of the local throwers, but use it as a practice session by focusing on your weakness throughout the match. The other important thing to remember is to keep track of your practice routines. Write down your results after you practice and track your progress. This can also help to reveal parts of your dart game that need special attention if you aren’t progressing over time.

  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
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