Three Welding Methods Compared
Sep 17, 2026
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Welding Technology – Joining Segment to Core
A diamond blade is only as strong as the joint between its segment and its steel core. If that joint fails, the segment can fly off at high speed - a dangerous and costly failure. Welding is the process that creates this critical joint, and understanding the different welding methods is essential for choosing the right blade.
Three Welding Methods Compared
| Method | Process | Strength | Best For |
|---|---|---|---|
| Brazing | Silver-based alloy melts between segment and core at ~650°C | Medium | Lower-cost blades, light-duty cutting |
| Laser Welding | High-energy laser beam melts segment and core edges together at contact point | Highest | Professional blades, wet/dry cutting, heavy applications |
| High-Frequency Welding | Induction heating melts brazing material between segment and core | Medium-High | Traditional manufacturing, specific applications |
Laser welding creates a true metallurgical bond - the segment and core literally become one piece of metal at the joint. This is why laser-welded blades can handle the toughest jobs and can be used for both wet and dry cutting.
Laser Welding: The Gold Standard
Of all attachment methods, laser welding yields the strongest bond to the core. Here's why:
Precision - The laser beam can be focused to a fraction of a millimeter, creating a clean, narrow weld
Strength - The weld joint is as strong as the core material itself
Heat Control - Minimal heat-affected zone means less thermal damage to the core
Typical laser welding parameters:
| Parameter | Range |
|---|---|
| Laser power | 500W – 5000W |
| Welding speed | 96 – 150 cm/min |
| Core thickness | 0.8mm – 4mm |
| Weld gap | 0.1mm – 0.5mm |
Brazing: The Traditional Approach
Brazing uses a silver-based alloy that melts at around 650°C and flows between the segment and the core. When cooled, this alloy creates a strong mechanical bond.
Advantages:
Lower equipment cost
Suitable for smaller production runs
Disadvantages :
Lower bond strength than laser welding
Wider heat-affected zone - more thermal stress on the core
Which Welding Method Should You Choose?
| If You Need | Choose |
|---|---|
| Maximum strength and safety | Laser Welding |
| Cost-effective blades for light work | Brazing |
| Both wet and dry cutting capability | Laser Welding |
| Traditional manufacturing with proven reliability | High-Frequency |
One Final Reminder
The weld joint is the single most critical safety point on a diamond blade. A failed weld means a segment flying off at high speed - a serious injury risk. Always choose blades from manufacturers with proven welding quality control.
Concerned about weld quality? Contact the Diaflex technical team to learn about our laser welding process.