Process of high-density tungsten alloyby Izzy X. Product specialist
High-density tungsten alloy, also known as tungsten-based heavy alloy, is a type of alloy made of tungsten as the matrix element (85% ~ 99% mass fraction) with the addition of Ni, Cu, Fe and other all Recommended Features
- Powder ---- Mixing --- Pressing --- Sintering --- Heat treatment --- Plastic deformation (Forging, rolling) --- Annealing-Product
- Heat treatment
- Plastic deformation processing
- After plastic deformation, the appropriate machining method can be selected according to the drawings, such as: turning, milling, cutting, drilling, polishing, etc.
Review on Process of high-density tungsten alloyThe sintering of high-density tungsten alloys mostly adopts liquid phase sintering process: normally, the sintering temperature is higher than the liquid phase temperature by 20 to 60 . The sintering temperature of W-Ni-Fe alloy is 15001525 , the density can be close to the theoretical density, the holding time is generally 6090min. If it exceeds 120min, the performance will drop. The use of higher sintering temperature and shorter holding time is beneficial to improve the tensile strength and elongation of the alloy. The choice of cooling rate is related to the m(Ni)/m(Fe) ratio of the alloy. When this ratio is not in the range of forming brittle compounds, such as the m(Ni)/m(Fe) ratio of 2 to 4, any cooling rate will not generate intermetallic compounds. To avoid brittleness and reduce porosity, it is beneficial to use an appropriate cooling rate.
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Created on Jul 7th 2020 21:21. Viewed 189 times.
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