Impact-resistant tungsten carbide balls are spherical products made primarily of micron-sized tungsten carbide (WC) or titanium carbide (TiC) powder, sintered using powder metallurgy processes with cobalt (Co) and nickel (Ni) as binders. They possess high hardness, wear resistance, corrosion resistance, and excellent impact resistance, making them core components in precision machinery, aerospace, and petrochemical industries.
I. Material Characteristics and Processing Advantages of Impact-Resistant Tungsten carbide balls
1. Balance of High Strength and Toughness
By adjusting the cobalt content (e.g., YG6 contains 6% cobalt, YG8 contains 8% cobalt), tungsten carbide balls significantly improve impact resistance while maintaining high hardness (≥90.5 HRA). For example, YG8 balls exhibit better toughness than YG6 when subjected to high-intensity impacts, making them suitable for mechanical environments with frequent vibrations. 2. Precision Manufacturing Process: The production process encompasses powder preparation, wet grinding, mixing, pressing, and vacuum sintering, ensuring the compactness of the spheres. The surface finish of the precision-ground spheres reaches G25 grade, with roundness error controlled within 1μm, meeting the requirements of high-precision bearings, instruments, and other applications.
3. Extreme Environment Adaptability: Carbide spheres are resistant to high temperatures (melting point up to 2870℃) and corrosion (insoluble in hydrochloric acid and sulfuric acid at room temperature), exhibiting stable performance in harsh conditions such as high-pressure oil and gas pipelines and deep-sea drilling. For example, oilfield valve balls need to withstand long-term high-pressure fluid impacts; the carbide material avoids the sealing failure caused by wear of traditional steel balls.
II. Typical Application Scenarios of Impact-Resistant Tungsten Carbide Balls
1. Precision Machinery Field: As bearing balls, carbide spheres support high-speed rotating components, reducing frictional loss and extending equipment life. Their wear resistance is dozens of times that of steel balls, making them suitable for high-precision transmission systems such as CNC machine tools and aerospace engines. 2. Energy and Chemical Industries
In oil pipeline systems, cemented carbide valve balls can withstand high pressure and corrosive media impacts, ensuring valve sealing. In chemical reactors, their corrosion resistance guarantees long-term stable operation.
3. Military and Special Manufacturing
Used in applications such as armor-piercing projectile cores and shot peening of aerospace parts, the high density (14.9 g/cm3) and high hardness of tungsten carbide balls enable efficient penetration or surface strengthening, improving equipment performance.
