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The Forging And Annealing Processes Of Pure Tungsten Bar

2024-01-05 18:00:06

1) After forging, the tungsten bar density and hardness are significantly improved, but the average forging ratio is too large, which may easily lead to the tungsten bar forging cracking and other phenomena. When forging at 1 450℃, the average forging ratio should be less than 32%.

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2) Compared with the tungsten bar forged with a smaller average forging ratio and one fire end, the tungsten bar forged with a larger average forging ratio and one fire end has a finer structure and higher hardness.


3) Total forging ratio is about 80%, with smaller average forging ratio, a fire at one end of the forging of tungsten rod at 1 300 ℃ annealing 30 min basically complete recrystallization, and the larger average forging ratio, a fire on both ends of the forging of tungsten bar at 1 350 ℃ annealing 60 min to complete recrystallization, and use higher average forging ratio, a fire on both ends of the forging of tungsten bar at 1 350 ℃ complete recrystallization annealing for 60 min. After annealing, the hardness of tungsten rods in the two forging processes will decrease, and the hardness of tungsten rods forged by the former process is less than that of the latter one before annealing and at the early stage of annealing. With the completion of recovery recrystallization, this difference is no longer obvious.


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