During the preparation and manufacturing process of cemented carbide, the following parameters need to be noted:
- Filling coefficient: that is, the compression ratio. The finer the mixture particles, the greater the loose filling ratio, and the greater the compression ratio to be pressed into a compact, usually 2.5-4.0.
- Linear shrinkage coefficient: It is the ratio of the size of the green compact to the corresponding size of the sintered finished product. Non-granulated materials and granulated materials are different, with the former being larger.
- Positive pressing force: In order to calculate the strength of the stamping die, the unit pressing pressure value must be known. Generally, the positive pressing force of cemented carbide is about 1.2T-1.3T/cm².
- Cutting speed: In cemented carbide processing, cutting speed is one of the most important parameters.
- Feed: If the feed is too small, the cutting force will be too large and the tool life will be reduced; if the feed is too large, the cutting surface quality will be reduced and the service life of the steel balls will be affected.
- Tool radius: In cemented carbide processing, tool radius is also an important parameter. Smaller tool radius helps improve machining accuracy, but it also leads to increased tool wear and requires more frequent tool replacement.
In short, the preparation and manufacturing of cemented carbide is a complex process, which requires attention to parameter control in material selection, mixture preparation, pressing, sintering, finishing, etc., to ensure product quality and performance.
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