The high-performance hard alloy shield cutting head from Boyun Dongfang is applied to the "Jinghua" shield machine, the largest diameter shield machine in China, and other national heavy equipment

Bowin Oriental relies closely on Central South University, the State Key Laboratory of Powder Metallurgy, the National Engineering Research Center of Powder Metallurgy, the State Key Laboratory of Lightweight High-Strength Structural Materials, and the China Nonferrous Metals Industry Powder Metallurgy Product Quality Supervision and Inspection Center. It has undertaken three projects of the National High-Tech Research and Development Program (863 Program), one project of the National Innovation Fund for Technology-Based SMEs, and multiple provincial and municipal scientific research projects. In 2020, Bowin Oriental produced ultra-coarse grain cemented carbide with a grain size greater than 9μm, achieving a better performance, which has reached the domestic leading level. Bowin Oriental's "Key Technologies and Applications of Design and Manufacturing for Tunnel Boring Machine Cutter Heads and Ultra-Coarse Grain Cemented Carbide Cutting Tools" won the first prize of the China Nonferrous Metals Industry Science and Technology Award, and "Key Technologies of Materials and Processes for High-Performance Cutter Heads and Cutting Tools of Large Tunnel Boring Machines in Complex Formations" won the first prize of the Sichuan Provincial Science and Technology Progress Award in 2021.

Boyun Dongfang possesses advanced self-activated high-temperature reduction-high-temperature carbonization technology for preparing ultra-coarse grain tungsten carbide powder, which boasts independent intellectual property rights. The ultra-coarse grain shield cutter head, collaboratively innovated and developed by the company and China Railway Construction Heavy Industry, serves as a key core component of shield machines. It has solved the "bottleneck" problem in construction machinery and been applied to multiple shield machines, including the "Jinghua", the largest diameter shield machine made in China, and the "Shenjiang No.1", the shield machine for China's deepest undersea tunnel. These shield machines have been exported to multiple countries and regions such as Russia, the Philippines, and India along with the large-sized shield machines of China Railway Construction Heavy Industry. The shield cutter head of Boyun Dongfang's "Jinghua" shield machine has been repeatedly reported by authoritative media such as People's Daily.

Description: Extra-coarse grain cemented carbide refers to cemented carbide with WC grain size greater than 6μm. Compared with coarse grain cemented carbide, it exhibits better toughness, superior thermal fatigue resistance, and higher wear resistance. It is widely used in industries such as shield tunneling, mining, stamping dies, cold heading dies, and rolling mills under extreme working conditions, significantly improving product reliability.

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High-performance ultra-coarse grain cemented carbide - shield cutting head

High-performance ultra-coarse grain cemented carbide - rotary drilling bit

High-performance ultra-coarse grain cemented carbide - stud