what are diamond cutting blades made of

Diamond blades are cutting tools composed of industrial diamonds embedded in their edges. These diamonds endow the blades with superior cutting capabilities, enabling them to slice through a wide range of materials.

 

Below is a detailed breakdown of the components of diamond blades:

Steel Core

• The steel core is the structural foundation of the diamond blade, providing stability and support. It is typically made of high-strength, heat-treated steel. This ensures the blade remains balanced, especially during high-speed operation, resulting in smoother cuts and reduced vibration. This helps extend the life of both the blade and the saw.

 

Diamond Segments

• Diamond segments are the outer edges of the diamond blade and are the actual cutting components. These segments consist of synthetic diamonds mixed with metal powders and bonded together through processes such as sintering or laser welding. Synthetic diamonds are used in diamond blades due to their consistent quality, strength, and uniform size. They can handle dense surfaces like asphalt, concrete, and bricks with ease and deliver predictable results.
• The diamonds embedded in the segments are industrial-grade synthetic diamonds. Synthetic diamonds are produced in laboratories under high-pressure and high-temperature conditions. Their physical and chemical properties are nearly identical to those of natural diamonds, and their hardness is the same. Synthetic diamonds are more cost-effective to produce than natural diamonds, offering stable quality and industrial applicability.

 

 

Bonding Matrix

The bonding matrix is a critical component that holds the diamond crystals in place. It is formed by sintering specially blended metal powders. The bonding matrix serves several vital functions:

• Disperses and supports the diamonds.
• Controls wear to expose new diamond crystals.
• Prevents diamond "pull-out."
• Acts as a heat sink.
• Distributes impact and load during cutting.

During the cutting process, the wear of the bonding matrix gradually exposes new diamond crystals, providing fresh cutting points for the blade.

 

Manufacturing Methods

• Vacuum Brazed Diamond Blades: Synthetic diamond particles are brazed to the outer edge of the circular saw blade in a vacuum brazing furnace. This method creates a relatively strong bond between the steel core and the diamond segments. Vacuum brazed diamond blades are cost-effective but are generally suitable for less intensive applications.

 

• Laser Welded Diamond Blades: A high-power laser beam is used to melt and weld the diamond segments or rim to the steel core. This method produces the strongest bond, allowing the diamond blade to withstand higher stress during cutting. Laser welded diamond blades are ideal for heavy-duty cutting tasks such as asphalt, concrete, and masonry.

 

• Sintered Diamond Blades: Metal and diamond particles are bonded together in a furnace using heat and pressure. The bond between the steel core and the cutting edge in sintered diamond blades is relatively strong. These blades are primarily suited for low-horsepower saws and softer materials.

 

• Electroplated Diamond Blades: Synthetic diamond particles are electroplated onto a nickel-coated steel blade base. These blades can be made very thin, with thicknesses measured in tens of micrometers, making them suitable for precise cutting.

 

 

 

Diamond Concentration

• Diamond concentration refers to the amount of diamond particles per cubic inch of bond material. Higher diamond concentration reduces the impact on individual diamonds during cutting, while lower concentration increases the impact on each diamond. The choice of diamond concentration depends on the material being cut. For example, harder materials may require higher diamond concentration.

 

Diamond Size and Grit

• The size of diamond particles affects the cutting performance of the blade. Smaller diamonds are suitable for cutting hard materials, as they provide more cutting edges and improve cutting efficiency. Larger diamonds are better suited for cutting softer materials, as they can withstand greater wear.

 

Diamond Toughness

• Diamond toughness refers to the ability of diamond particles to resist cracking or chipping. Higher-toughness diamonds are more suitable for cutting hard materials, as they can withstand greater stress and impact during cutting.

 

Blade Segments and Rims

1. Segmented Rim Blades: The rim segments have gaps between them, separated by narrow gullets. This design increases airflow and reduces heat buildup, making them suitable for cutting hard materials like bricks, concrete, and masonry. They are often used for dry or wet cutting with circular saws or walk-behind saws.
2. Continuous Rim Blades: The rim is solid with no gaps or gullets. These blades provide smooth, chip-free cuts and are ideal for hard materials prone to chipping or materials requiring a smooth finish, such as ceramic tiles, porcelain tiles, and marble. Continuous rim blades are typically used for wet cutting.
3. Turbo Rim Blades: The rim has small grooves or serrations. These blades offer faster cutting speeds and are suitable for materials like granite, cast iron, and natural stone. They are commonly used with handheld saws and circular saw blades.

 

Bond Types

The bond refers to the softness or hardness of the powdered metal used to form the segments. It controls the rate at which the diamond segments wear down, allowing new diamonds to be exposed at the surface for continued cutting with a "sharp" edge. Hard bonds are suitable for cutting soft materials like asphalt, while soft bonds are better for hard surfaces such as granite and concrete. Choosing the right bond type is crucial for achieving optimal cutting performance and extending the blade's lifespan.

 

In summary, diamond blades are composed of a steel core, diamond segments, and a bonding matrix. The diamond segments contain synthetic diamonds mixed with metal powders, bonded through processes like sintering, laser welding, or electroplating. The steel core provides structural support, while the diamond segments and bonding matrix work together to grind through materials. The performance of diamond blades is influenced by factors such as diamond concentration, size, toughness, bond type, and segment design. By selecting the appropriate diamond blade based on the material being cut and cutting requirements, users can achieve efficient and precise cutting results.

 

 

Quanzhou Huice Tools New Material Co.,Ltd. Company is a diamond tool manufacturer with 19 years of production experience, producing various types of diamond saw blades, sintered diamond saw blades, laser welded diamond saw blades, saw blades with diameters ranging from 105mm to 1600mm, as well as 2000-3500mm mining saw blade segments. The products are used in stone mining, stone processing, construction engineering, engineering reconstruction, renovation, and civilian manual processing fields. The product is manufactured for multiple foreign brands, with stable performance and high cost-effectiveness.