The main components of graphite powder carburizer include the following aspects:
The main component of graphite powder carburizer
1. Fix carbon
Fixed carbon is the main active component in graphite powder carburizing agent, which directly participates in the carburizing process.
- Content: The fixed carbon content of high-quality graphite powder carburizer is usually more than 90%, and high-end products can reach more than 98%.
- Function: The higher the fixed carbon content, the better the carburization effect.
The main component of graphite powder carburizer
2. Sulfur (S)
Sulfur is one of the harmful impurities in graphite powder carburizer.
- Content: The sulfur content of high-quality graphite powder carburizer should be less than 0.05%.
- Influence: High sulfur content can lead to sulfide inclusion in castings, affecting the mechanical properties and surface quality of castings.
The main component of graphite powder carburizer
3. Ash
Ash is the non-combustible material remaining after the graphite powder carburizer is burned at high temperature.
- Content: The ash content of high-quality graphite powder carburizer should be less than 1%.
- Influence: too high ash content will increase the amount of slag, affecting the purity of hot metal and casting process.
The main component of graphite powder carburizer
4. Volatiles
Volatile is the gas component released during the heating process of graphite powder carburizer.
- Content: The volatile content of high quality graphite powder carburizer is usually less than 1%.
- Impact: Too high volatile content will cause a large amount of gas to be produced when the carburizer is added to the hot metal, affecting the carburizing effect and the operating environment.
The main component of graphite powder carburizer
5: Moisture
Water content is the water content in the graphite powder carburizer.
- Content: The moisture content of high-quality graphite powder carburizer should be less than 0.5%.
- Impact: Excessive moisture will cause steam to be generated when the carburizer is added to the hot metal, affecting the carburization effect and operation safety.
The main component of graphite powder carburizer
6. Other trace elements
Graphite powder carburizer may contain a small amount of other trace elements, such as nitrogen, hydrogen, oxygen and so on.
- Content: The content of these elements is usually very low.
- Influence: The content of trace elements has little influence on the carburization effect, but it needs to be controlled within a reasonable range.
The main component of graphite powder carburizer
7. Physical characteristics
- Particle size: The particle size of graphite powder carburizer is usually between 0.5-5mm, and the specific particle size selection depends on the casting process.
- Density: The packing density of graphite powder carburizer is about 0.5-0.7g/cm³.
- Color: Usually black or dark gray.
The main components of graphite powder carburizer include fixed carbon, sulfur, ash, volatile, moisture and a small amount of trace elements. Among them, fixed carbon is the main active component, sulfur, ash and volatile are harmful impurities, and their content should be strictly controlled. Reasonable selection and use of graphite powder carburizer can effectively improve casting quality and reduce production costs.
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