Forging and annealing processes for Tungsten Rods

Over the years, a great deal of work has been done on the thermal processing of Tungsten Rods. The effects of processing deformation and annealing regimes on the material properties and the mechanisms of reversion to recrystallization have been investigated in detail and many results have been obtained. In the next section, we take a look at the research and conclusions on the forging and annealing process for Tungsten Rods. Here are some answers.

Here is the content list:

l A study of the forging and annealing process for Tungsten Rods.

l Conclusions on the forging and annealing process for Tungsten Rods.

A study of the forging and annealing process for Tungsten Rods.

Sintered Tungsten Rods were forged and elongated using different average forging ratios and forging methods, and forged Tungsten Rods were annealed under different annealing regimes. The microstructure and physical and mechanical properties of the specimens were analyzed using a metallographic microscope, hardness tester, and density tester. The results showed that forging significantly increased the density and hardness of the pure Tungsten Rods, but the average forging ratio was too large, resulting in forging cracking. When forging at 1 450 °C, the average forging ratio should be less than 32%. Compared to Tungsten Rods forged at one end of a fire with a smaller average forging ratio, Tungsten Rods forged at both ends of a fire with a larger average forging ratio have a finer structure and a higher hardness of 452.1 HV10 and require a higher annealing temperature and longer annealing time (60 min at 1 350 °C) to complete recrystallization. The hardness of the tungsten alloy rod forged by this process is relatively higher before and during the initial annealing period, but as the recrystallization process is completed, the hardness of the two types of forged Tungsten Rods gradually decreases and the difference in hardness is no longer significant.

Conclusions on the forging and annealing process for Tungsten Rods.

Firstly, the density and hardness of the Tungsten Rods increased significantly after forging, but the average forging ratio was too large, which could lead to forging cracking and other phenomena in the Tungsten Rods, and the average forging ratio should be less than 32% when forging at 1 450 °C. Secondly, compared to Tungsten Rods forged at one end of a fire with a smaller average forging ratio, Tungsten Rods forged at both ends of a fire with a larger average forging ratio have a finer structure and higher hardness. Thirdly, at a total forging ratio of approximately 80%, the Tungsten Rods forged at one end of one fire with a smaller average forging ratio essentially complete recrystallization at 1,300 °C for 30 min of annealing. With a larger average forging ratio, the tungsten carbide rod forged at both ends of one fire was annealed at 1 350 °C for 60 min before recrystallization was completed. After annealing, the hardness of the rods decreases for both forging processes, and the Tungsten Rods forged by the former process are less hard than those forged by the latter before and at the beginning of the annealing process, but the difference is no longer significant as the recrystallization process is completed.

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