Supercoarse Tungsten Carbide Applied for Tungsten Carbide Shield Cutter

Tungsten carbide shield cutter is an important part of shield tunneling machine, and supercoarse tungsten carbide is an important raw material for manufacturing the shield cutter. According to the experts, with the development of domestic shield technology, shield tunneling machines are more and more widely used in subway, municipal and underground pipe network construction projects. As the key raw material of shield cutter, the performance of tungsten carbide determines the life of shield cutter, and also determines the digging efficiency and economic benefit of the entire project.

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The experts also introduced that wear resistance of tungsten carbide has a positive correlation with the service life of the cutter; high-brittle cutters are more likely to break under geological conditions with high impact and high strength. In this regard, they compared and analyzed the performance of the commonly used cemented carbide YG13C and the ultra-coarse-grained cemented carbide KC60 from the aspects of thermal conductivity, elastic modulus, wear resistance, etc. The results showed that such a cutter exhibit better impact resistance and wear resistance.

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