The blade blanks are typically cut from flat steel bar stock or plates using methods like sawing, laser cutting, or water jet cutting.
The blanks are then ground or milled to the desired shape and dimensions.

2,Heat Treatment:

For high-carbon and alloy steel blades, the blanks undergo a heat treatment process to increase hardness and wear resistance.
This usually involves heating the blades to high temperatures (around 1000°C) followed by quenching and tempering.
The heat treatment process is carefully controlled to achieve the optimal balance of hardness and toughness.

3,Grinding and Finishing:

After heat treatment, the blades undergo precision grinding to create the desired cutting edge geometry, including the bevel angle and edge profile.
For serrated-edge blades, additional grinding steps are used to create the saw-tooth pattern.
The blades may also be polished or coated to improve surface finish and reduce friction during operation.

4,Carbide-Tipped Blades:

For carbide-tipped granulator blades, a tungsten carbide insert is first produced using powder metallurgy techniques.
The carbide insert is then brazed or welded onto the steel blade body, forming a strong and secure bond.
This process requires specialized equipment and expertise to ensure proper alignment and adhesion of the carbide tip.

5,Blade Mounting:

Once the blades are fully processed, they are carefully inspected and prepared for installation on the granulator's rotor assembly.
This may involve drilling the mounting holes, adding locating features, or applying protective coatings.
Proper blade mounting and alignment are crucial for ensuring safe and efficient granulator operation.

Granulator Blade Specifications:

The selection of material for granulator blades has the following main impacts on their performance:

1,Hardness and Wear Resistance:

Hard materials like alloy steel and tungsten carbide can provide higher blade hardness, resulting in better wear resistance and edge retention. This helps extend the blade's service life.
In comparison, high-carbon steel blades, though lower in cost, have inferior hardness and wear resistance.

2,Impact Resistance:

High-carbon steel and alloy steel blades have good impact toughness, allowing them to withstand the impact loads encountered during the granulation process without easily fracturing.
Tungsten carbide blades, despite their extremely high hardness, are relatively brittle and more susceptible to cracking under impact loads.

3,Manufacturing Complexity:

Tungsten carbide, as an extremely hard material, requires specialized manufacturing techniques such as powder metallurgy and high-temperature welding, making the process more complex and costly.
In contrast, the manufacturing of high-carbon steel and alloy steel blades is relatively simpler and less expensive.

4,Cost of Ownership:

Tungsten carbide blades have a longer service life, but the initial cost is higher.
High-carbon steel blades have a lower cost, but require more frequent replacement and maintenance.
Alloy steel blades strike a balance, offering improved performance at a moderate cost.

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