What is the effect of two cracks on the carbide bar.
Tungsten carbide is a material composed of a hard phase and a bonded phase, where the hard phase dominates the alloy, giving the alloy good wear resistance and hardness. Cracks on tungsten carbide bars are a common problem, and the presence of cracks has a significant impact on the quality and performance of the bars.
First of all, cracks in the carbide bar can lead to a decrease in its strength and stiffness. The existence of cracks makes the bar stock prone to stress concentration when stressed, which further causes fracture. As a result, carbide bars with cracks are susceptible to brittle fracture during use, shortening their service life.
Secondly, cracks can also affect the machinability of tungsten carbide bars. During bar processing, cracks tend to propagate and cause bar fragmentation, which affects processing efficiency and product quality. In addition, the presence of cracks can also affect the wear and corrosion resistance of the bar, because the crack is prone to accumulate corrosive substances and moisture, which aggravates the corrosion and wear of the bar.
In order to reduce the impact of cracks on tungsten carbide bars, a series of measures can be taken. First of all, when preparing cemented carbide bars, the process parameters should be strictly controlled to reduce the number of internal stresses and microcracks. Secondly, heat treatment and surface treatment are used to improve the crack growth resistance and wear resistance of the bar stock. In addition, during processing and use, excessive shock and vibration should be avoided to prevent crack propagation and fracture.
In summary, the presence of cracks on tungsten carbide bars adversely affects its quality and performance. In order to reduce these effects, a series of measures need to be taken to improve the crack growth resistance and wear resistance of the bar stock. At the same time, excessive shock and vibration should be avoided during use to prolong the service life of tungsten carbide bars.