![Metallographic photos of three dewaxing method](https://chinaequips.com/wp-content/uploads/2023/07/Metallographic-photographs-of-cemented-carbide-after-hydrogen-dewaxing-and-vacuum-sintering-300x225.png)
Comparison of three dewaxing methods by a dewaxing furnace
Under the test conditions, the effect of hydrogen dewaxing is better than that of vacuum dewaxing, and the effect of vacuum dewaxing is better than that of nitrogen dewaxing.
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Under the test conditions, the effect of hydrogen dewaxing is better than that of vacuum dewaxing, and the effect of vacuum dewaxing is better than that of nitrogen dewaxing.
In general, paraffin still has great advantages in the preparation of high-performance cemented carbide. It needs to be removed by a debinding furnace (dewaxing furnace).
With the development of SPS technology and the requirements of large-scale industrial manufacturing, multi-cavity molds and some special shape molds have also been developed one after another.
The SPS spark plasma sintering process pressure’s loading timing will affect the material’s performance.
Some scholars have studied the relationship between heating rate and microstructure and the relationship between heating rate and densification under SPS conditions.
Many factors, such as mold and sample size, electrical conductivity, and mold powder filling, will have a greater impact on the actual temperature field distribution of the sample.
There is still a lot of controversy about the contribution of the electric field to the rapid densification of SPS Spark Plasma Sintering.
Studies have shown that exceptionally high melting point materials with low diffusion coefficients, such as nitrides, borides, and carbides, can rapidly prepare at relatively low temperatures under SPS conditions.
We prepare the W-Re high specific gravity alloy by SPS spark plasma sintering furnace. The sintering temperature was 1800℃, the sintering pressure was 40MPa, and the holding time was 5min.
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