Research on Tungsten Spheres at Home and Abroad

In our industrial production and daily life, tungsten spheres have many important effects on us, in fact, not only in the industrial and daily fields but also in the field of research is equally important. What is the current research status of tungsten spheres at home and abroad? Let's take a look at it.

The following is a list of contents:

l Research on the tungsten ball preparation process at home and abroad

l Research on the properties of tungsten balls at home and abroad

l Research on tungsten ball cutting and processing at home and abroad

Research on the tungsten ball preparation process at home and abroad

Foreign scholars have studied the microstructure, tensile properties, and impact properties of high-density tungsten alloys prepared by microwave sintering, and the results show that the tensile properties of the two tungsten alloys prepared by microwave sintering are significantly better than those obtained by liquid-phase sintering.

In contrast, domestic scholars used the discharge plasma sintering technique to prepare high-density tungsten spheres. Fine-grained tungsten alloy balls (tungsten grain size of about 6 μm) were obtained by a controlled SPS process, and the tungsten alloys prepared by the SPS process had high flexural and yield strengths, and the interfacial debonding between the tungsten and the bonding phase was significantly reduced in the high-density tungsten alloys prepared by this method.

Research on the properties of tungsten balls at home and abroad

Foreign scholars have studied the effect of sintering temperature on the deformation mechanism of three high-density tungsten alloy balls with different content ratios under high strain rate loading. The experimental results showed that the ductility and plasticity of tungsten alloys increased with increasing sintering temperature, and the impact fracture mode of the material changed.

Domestic scholars have studied the tensile mechanical properties of high-density tungsten spheres at high temperatures. It was found that the tensile and yield strengths of tungsten spheres decreased with increasing temperature, and the elongation and section shrinkage of the material increased and then decreased. The analysis of the fracture characteristics of the specimens showed that the plasticity of tungsten grains increased at 400-600°C and the ability of the material to coordinate deformation increased, and when the temperature was higher than 700°C, the toughness of the material decreased significantly due to the dynamic recrystallization and softening of the bonded phase.

Research on tungsten ball cutting and processing at home and abroad

At present, the research on tungsten alloy cutting mainly focuses on the influence of process parameters and tool materials on macroscopic properties such as surface morphology and roughness of tungsten alloy balls, while less research has been conducted on their microstructure evolution, mechanical property changes, and cutting mechanisms. According to the results of foreign studies, the material removal rate was increased by a factor of three, and the surface roughness of the machined workpiece was reduced compared with the conventional cooling conditions.

And Chinese scholars conducted cutting tests on tungsten spheres by ultrasonic vibration dry turning and investigated the effect of cutting tungsten alloy with different tool materials, tool wear patterns, and cutting and vibration parameters on the dimensional accuracy and surface roughness of the machined workpiece. It was found that the wear resistance of carbide tools was better than that of coated tools.

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