Black tungsten rod
Polished tungsten rod
Custom length tolerance(mm)
Tungsten rods possess special properties, such as low thermal expansion with good thermal conductivity, adequate resistance to electrical resistance, and high elastic modulus. Therefore, tungsten rods are widely used in various fields. Such as support line, lead line, printer needle, various electrodes and quartz furnace, filament, high speed tools, automotive automatic products, sputter target material.
As a professional tungsten rod manufacturer in China, HSG Metal specializes in the production of high-quality tungsten rods. We have been providing top-tier tungsten rods to our customers from all over the world. If you are looking for a tungsten rod factory, contact us now!
Different average forging ratios and forging methods were used to draw the sintered pure tungsten bar, and the annealed tungsten bar was annealed under different annealing systems. The microstructure and physical and mechanical properties of the samples were analyzed by metallographic microscope, hardness tester and density tester. The results showed that:
1.0 After forging, the density and hardness of tungsten bar are improved significantly, but too large average forging ratio will easily lead to forging cracking and other phenomena of tungsten bar. When forging at 1450℃, the average forging ratio should be less than 32%.
2.0 Compared with the tungsten bar forged with smaller average forging ratio and one end of one fire, the tungsten bar forged with larger average forging ratio and two ends of one fire has finer structure and higher hardness.
When the total forging ratio is about 80%, the recrystallization of the tungsten rod forged at one end of one fire is basically completed after annealing at 1300℃ for 30 min, while the recrystallization of the tungsten rod forged at both ends of one fire is completed after annealing at 1350℃ for 60 min when the average forging ratio is larger. After annealing, the hardness of tungsten bars with the two forging processes will decrease, and the hardness of tungsten bars with the former process is less than that with the latter process before annealing and at the early stage of annealing, and this difference is no longer obvious with the completion of recovery recrystallization.
The surface of sintered tungsten rod is silver-gray metallic luster;
The surface of the forging tungsten rod has a layer of oxide, the surface is black;
Polished tungsten rod, silver gray metallic luster.