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2026
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Breakthrough Achieved in Domestic High-Performance Carbide Gear Shaving Cutters
Cemented carbide gear shaving tools are critical precision instruments for gear finishing. By performing fine shaving on pre-formed gear tooth surfaces, they eliminate heat treatment deformation, enhance tooth profile accuracy, and improve surface quality. These tools directly determine the NVH (Noise, Vibration, and Harshness) performance and reliability of core transmission components such as gearboxes. For an extended period, the high-end shaving cutter market has been monopolised by a handful of foreign enterprises. Their exorbitant pricing and protracted supply cycles have constrained China's high-end gear manufacturing sector in terms of cost control and supply chain security.
The breakthrough product embodies multiple independent innovations. Firstly, in material development, the R&D team optimised the particle size distribution of tungsten carbide powder and the cobalt-based binder phase to create a specialised cemented carbide substrate with a unique microstructure. This ensures high hardness while significantly enhancing the material's impact toughness. Secondly, in cutting edge treatment, an innovative ‘micro-nano texture + composite coating’ technology was applied. This involves constructing micrometre-level lubricating textures on precision-ground cutting edges, followed by layering multi-gradient (Ti,Al)N coatings. This synergistically enhances the tool's anti-adhesion and wear resistance properties. Furthermore, drawing upon a database of materials and processes commonly used in China's gear industry, the tool design incorporates novel front angle and chip groove optimisation schemes. This ensures smooth chip evacuation and minimises temperature rise during cutting operations.
Production data indicates that under identical machining conditions, this novel shaving cutter achieves an average eightfold increase in single-edge grinding life compared to conventional high-speed steel tools. Its longevity surpasses that of imported high-end cemented carbide tools by approximately 30%, while consistently maintaining gear tooth profile errors within 3 micrometres. The successful application of this product will not only substantially reduce tooling costs and shorten supply cycles for domestic gear manufacturers but also robustly support the growing demand for high-quality gears in China's new energy vehicle and high-end equipment sectors. This advancement enhances the overall competitiveness and security of the industrial supply chain.
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