| 摘要 |
PROBLEM TO BE SOLVED: To provide a uniform and fine vanadium carbide powder of high purity having good dispersibility in an alloy in order to improve the characteristics of a ultrafine sintered carbide alloy and to provide a producing method and a producing device of the powder. SOLUTION: This vanadium carbide powder has <=1.0 μm average particle size, >=15 wt.% of bonded carbon amt. and <=0.5 wt.% oxygen content. To produce the vanadium carbide powder, a producing device of the vanadium carbide powder is used and is equipped with a rotary furnace in which reduction carbonization is carried out in a hydrogen flow. The rotary furnace 10 is equipped with a cylindrical heater 3 in the center part and a two-layer cylinder consisting of first and second graphite cylinders 1, 2 is installed so as to surround the heater. The first cylinder 1 is arranged and fixed in the outside of the second cylinder 2 and the second cylinder 2 is rotatably provided. The material to be treated is heat-treated while the material continuously flows through the second cylinder. |
