Tungsten carbide production process of screening technology

Carbide, chemical formula WC, by its own physical properties, hardness comparable to diamond, is widely used to produce cutting tools and wear-resistant member.
Production of tungsten carbide mixed into Molybdenum plate, carbonation, milling, screening, testing, and several other steps.
1, the material mix: the tungsten powder was mixed with carbon black. Depends on the quality of tungsten carbide powder tungsten powder mixed with carbon black uniform extent that if uneven mixing of materials, tungsten carbide powder will appear sinister and stratification. Cemented carbide manufacturing process, in general, the tungsten powder and carbon black were mixed in a ball mill (ball to powder ratio of 1:1, the ball diameter is 35 ~ 50mm), milling time is 2 ~ 4h, no material with the naked eye stratification that is considered mixed.
2, carbonized material: tungsten carbide powder, usually in the graphite tube furnace, carbonization process according to the granularity of tungsten powder and tungsten carbide particle size requirements to select, in general, fine tungsten powder carbonization temperature of 1300 ~ 1350 ℃, coarse tungsten powder carbonization temperature of 1600 ℃, carbonization time is 1 ~ 2h.
3, ball: in a ball mill for milling. Ball to powder ratio of 1:1, the ball diameter is 10 ~ 45mm, milling time according to process requirements, usually 2h.
4, the screening: In order to prevent the powder from flying, sieved to be carried in a closed case, the fine particles of tungsten carbide through 200 mesh sieve, the particles through a 250 mesh tungsten carbide, tungsten carbide coarse particles through a 60 mesh sieve.
5, after passing inspection derived products.
Special Note: The tungsten carbide screening process must choose the appropriate shaker, so screening efficiency and quality of the highest level of screening.