In the water quench experiment, the pottery material nozzle cracks at the end face firstly, and then extend axially until depth throughout the nozzle. So the main failure mode is integral cracking. YG8 tungsten carbide nozzle performed well in thermal shock, which has tiny cracks at 500℃ difference in temperature, spall with lumps over 700℃ difference in temperature and when the difference in temperature reaches 900℃, the radial pattern cracks will appear. Therefore, tungsten carbide main failure mode in water quench experiment is massive spalling and concentrated in the end face of pore edge and the external cylindrical edge.

Through the simulation showed that the more thermal shock temperature difference, the greater the thermal stress. At the same difference in temperature, the thermal stress of YG8 tungsten carbide is lower than AL₂O₃ pottery nozzle, and then decreased with time goes by. The experimental data shows that YG8 tungsten carbide nozzle is better than AL₂O₃ pottery nozzle in heat resistance and anti-seismic.















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Sudden Death tungsten dart rule is a very fast moving game for a large number of players. Playing with less than six player’s means the game will be over in two or three minutes.

The Object: To be the last person not eliminated.

The Scoring: No scoring are needed, all you have to do is remember playing order and what the lowest score thrown in each round is.

The Play: Each player (there are no teams in this game) throws one tungsten dart at bulls-eye, closest to the bulls-eye goes first.

Each player takes a turn trying to throw the highest possible score with three tungsten darts. Each tungsten dart scores the number where it landed with the thin outer "doubles" ring counting as two times the number hit and the thin inner "triples" ring counting as three times. The outer bulls-eye counts as 25 and the inner as 50 points.

After each player has thrown, whoever threw the lowest score that round is eliminated from the game and the next round is thrown with the remaining players. Whoever is left in the game at the end wins.

Strategy: Play your strongest numbers! A triple 16 (if that's your number) is a lot better score that floundering around the 20 and hitting 5's and 1's.

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Slider tungsten dart rule is a very easy game, but good practice because it uses the whole board. It is also a very fast moving game and can usually be finished in under 10 minutes. Any number of players can play. Handicapping can be done by limiting the target area of stronger players.

The Object: To hit every number on the board in order from 10 through 20 with one tungsten dart and finish before the other players.

The Scoring: Scoring is not needed in this game as long as everyone can remember what number they are up to and what order they shoot.

The Play: The first player tries to shoot first at 10, when a 10 is hit, play moves on to 11 and so on until all three tungsten darts are thrown. The next player then does the same thing, and so on. Remember only the number that the player is shooting for counts and all the numbers must be shot in order.

If the player misses the target number with all three tungsten darts, the player "slides" back a number for the next turn. For example, if the player is throwing at 15 and misses with all three tungsten darts, the next time that player throws, the target number will be 14.
The first player to hit the 20 wins.

Strategy: There isn't any.

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Tungsten carbide and pottery nozzle is tougher than metal nozzle and they have good anti-abrasion and anti-corrosion performance so that they improve the lifespan of nozzle. But they all belong to fragile materials and vulnerable, which is difficult to process and often used in making some simple structure nozzles and nozzle linings. The entrance of the nozzle should always wear high temperature and heat radiation by furnace in CWS atomizing processing. And CWS intensive leads cool the inner wall of nozzle, which come into being obvious temperature gradient and thermal stress. So the possibility of thermal shock and molder is remarkably increasing.
















Tungsten Carbide Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-carbide.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