Cemented carbide sintering is the most basic and critical process in the production process, and it is also the last process. Sintering methods and equipment have a huge impact on the product. Conventional sintering methods include hydrogen sintering, vacuum sintering, hot isostatic pressing etc.
The platy molybdenum electrode can withstand higher current density, and is often used in a feed channel or a melting pool. The heating is relatively uniform, generally does not produce too strong convection, and the erosion of the electrode hole brick is smaller than that of the rod electrode.
Despite the unfavorable factors of many domestic and international environments and the continuous development of national environmental protection policies, in the first half of 2018, China's tungsten industry continued its steady and good trend since last year. The production of tungsten concentra
Like tungsten, molybdenum is a refractory rare metal with a melting point of 2620 ° C. The bonding force between atoms is extremely strong, and the coefficient of expansion is small, the conductivity is large, and the thermal conductivity is good.
On July 10, the Ministry of Natural Resources held a press conference on the 2017 National Mineral Resources Reserves. At the meeting, in 2017, China's metal minerals found a general increase in resource reserves, of which tungsten ore increased by 1.4%.
China's cemented carbide ball and drill has large production capacity and global competitiveness. Its production capacity still has room for expansion. The domestic and international markets have good prospects.
Molybdenum wire has high melting point, high strength and high modulus of elasticity, low expansion coefficient, low vapor pressure, good electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in lighting appliances, vacuum devices, machining and spraying.