Tungsten and Tungsten Alloys Sintered Billet Indirect Sintering Industrial Examples

Tungsten and tungsten alloy compacts and pre-sintered preform is placed resistance furnace, induction furnace and other forms of legislation in the sintering furnace sintering method called indirect.

Indirect Sintering Equipment

Horizontal molybdenum wire furnace: for sintering tungsten - nickel alloy, tungsten heavy alloy (W-Ni-Fe, W-Ni-Cu, etc.), tungsten - copper and tungsten - silver alloy.

High temperature resistance furnace, induction furnace, etc.: for sintering pure tungsten and unit-based or multi-line solid-phase sintering of tungsten alloy.

Indirect sintering process: indirect sintering pure tungsten and unit production lines or multicomponent solid-phase sintering products.

The indirect heating furnace sintering sintering temperature below the sintering temperature pendant melting method. Therefore, the use of indirect sintering tungsten powder particle size and compaction pressure demanding.
Indirect sintering process developed in addition to choosing the right tungsten and its alloy powder, the blank size and weight are also important basis for requiring a slow warming and sufficient intermediate temperature holding time.

Indirect Production of Sintered Tungsten Heavy Alloy

Common high density tungsten-based alloy: W-Cu-Ni series and W-Ni-Fe series. Tungsten alloy commonly used in the production of this type of horizontal molybdenum wire furnace. To 90% W +2.5% Cu +7.5% Ni as an example. This is typical of the surface tension of the liquid and the solid - liquid interfacial tension, liquid phase sintering can be divided into three distinct phases boundary is.


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