W-Ni-Cu-Based High-Density Alloy Compacts Prepared by Preparing the Mixture

Milling Mixing Method

Generally the production of high-density tungsten alloy, mixture preparation materials are used mostly dry powder mixing method, namely mechanical mixing. This method is characterized by simple preparation process. Form a V-shaped or cone blenders. Since W, Ni, Cu metal powders of different densities, in order to achieve uniformity of mixture will generally be Ni, Cu, W powder, mixed 8-12h.

Secondary Pyrolysis Reduction Method

To obtain W-Ni-Cu highly uniform mixing of the components, and to mix with a high sintering activity, it developed a named "secondary pyrolysis Reduction" of new technology. The resulting coating has a certain performance W - Ni-Cu sintered mixture of different ingredients than normal milling mixture reduces 100-130 ℃, and the resulting aggregate is more excellent.

Secondary pyrolysis method is to first reduction of nickel nitrate dissolved in distilled water, then W powder and uniformly mixed solution of nickel nitrate, roasted solution and reduction, and the obtained composite powder of nickel tungsten package. Then the composite powder was mixed with copper chloride, drying, reducing, and finally obtain W, Ni, Cu composite powder.

Mechanical Alloying

Mechanical alloying process is the 1970s after the development of a special alloy materials Preparation mature technology. Mechanical alloying metallic raw material powder in proportion to the drum into a ball mill, adding the ball, in order to prevent dirty, the product of the same composition can also be a W alloy ball. Mechanical alloying time to reach the mixed powders reached after 60h alloying and composition distribution, then press forming and sintering processes. The sintering temperature can be considerably lower.

In addition, since the 1990s, foreign research developed yet another new job - RSU reactive spray deposition method, using this method time is short, quick, the production of tungsten alloy powder and mechanically mixed powder compared to greatly improve reactive sintering the alloy microstructure uniformity and mechanical properties of the alloy.




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 >