Tungsten and Tungsten Alloys Sintered Billet Direct Sintering Industrial Examples

The sintered tungsten, and alloys commonly used direct sintering, sintering indirect. Direct sintering method used for smaller size for bars, rods, wire and other tungsten alloy powder metallurgy and production of billets. Indirect sintering method used for large slab. Partial liquid phase sintering method for the preparation of tungsten and its alloy powder metallurgy products, such as tungsten slab, high density tungsten alloy, tungsten - copper alloy.

Tungsten furnace burn down preform is placed between two electrode holder, burn preform in a protective atmosphere of hydrogen (and other protective atmosphere or vacuum) in low voltage, high current, resistance heating sintering method called direct sintering method.

Direct sintering equipment: direct sintering of major equipment for the pre-burning furnace and vertical furnace, furnace structure common is hanging bell-type water-cooled, single and multi-hood-type hood.

Direct Sintering Process

Pre-Sintering

The purpose of pre-sintered compacts to exclude the fusible and volatile substances, improving spoon compacts conductivity and strength. Pre-sintering system based on blank grades and specifications determined.

Vertical Melt Sintering

Melting down the sintering process is mainly for controlling the current value system, the heating time and holding time, the cooling water temperature and flow. Generally vertical melt production, each batch of tungsten blanks in determining the technological system before, do first fuse test to determine the fusing current. Production of the highest vertical melt fusing current operating current of approximately 88% -93%.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn
 

• < Prev
• Next >