Sandvik CV-series Vertical Shaft Impactor (VSI) crushers are famous for high-velocity aggregate shaping and sand production. However, operating rotors at speeds exceeding 70 m/s subjects carbide wear parts to severe shear stress and continuous thermal shock. If the bond between the tungsten carbide insert and the steel carrier fails, carbide tiles can dislodge, causing catastrophic rotor damage. Today, we explore how advanced silver-copper induction brazing protects Sandvik VSI rotors and extends wear component life.
The Engineering Challenge: Thermal Stress & Impact Shear
In high-speed Sandvik VSI rotors, carbide exit tips face two simultaneous destructive forces:
- High Shear Mechanical Impact: Rocks striking the exit edge exert tremendous force, attempting to peel or shear the carbide tile away from its pocket.
- Thermal Expansion Mismatch: Steel expands at a higher rate than tungsten carbide under heat generated by friction. Poorly brazed joints crack under thermal stress, leading to insert loss.
Why Silver-Copper Induction Brazing Is Essential
To solve joint failure, high-performance replacement tips utilize specialized silver-copper brazing alloys combined with automated induction heating:
- High Shear Resistance: The silver-copper alloy creates a high-tensile metallurgical bond capable of absorbing intense shear forces during heavy aggregate impacts.
- Thermal Expansion Cushioning: The ductile copper inter-layer acts as a shock absorber between the steel housing and the tungsten carbide insert, relieving internal thermal stress.
- Void-Free Joint Coverage: Automated induction heating ensures uniform alloy flow across 100% of the contact surface, eliminating air pockets that lead to localized bond failure.
Key Advantages for Sandvik VSI Operators
- Zero Insert Detachment: Prevents costly rotor repairs caused by loose carbide tiles colliding inside the crushing chamber.
- Extended Production Hours: High-purity carbide tiles combined with rugged brazing bonds withstand long operational shifts in abrasive granite and basalt.
- Seamless Compatibility: Precision-machined steel holders fit Sandvik rotor pockets perfectly for quick, hassle-free installation.
Source High-Performance Sandvik Wear Parts from MCT
Protecting your Sandvik VSI rotors against high-impact shear requires replacement components engineered with uncompromising metallurgical quality.
At MCT, we manufacture copper-brazed VSI rotor tungsten carbide tips and wear liners compatible with Sandvik CV-series equipment. Explore our product line on our VSI Rotor Product Page or contact our technical sales team today to request a quote!
