Stellite™ 6 is a cobalt-based alloy renowned for its exceptional performance in high-temperature wear and corrosion resistance. Composed of 27%-32% chromium, 4%-6% tungsten, 1%-2% carbon, 3%-4% nickel, 1%-2% silicon, 3%-4% iron, and the balance being cobalt, this material maintains its hardness up to 500°C (930°F), making it an ideal choice for demanding high-temperature corrosion and wear applications.
Applications of Stellite™ 6
- Hardfacing
- Valve seals
- Saw teeth
- Bearings and shaft seals
- Ball seals
- Oil and gas valves
- Valves in the nuclear industry
Why Laser Clad Stellite™ 6?
While traditional methods like Plasma Transferred Arc (PTA) welding are commonly used for applying Stellite ™ 6 overlays, they can lead to challenges such as sporadic porosity due to heat buildup during the welding process. In contrast, laser cladding provides focused heat input, which significantly reduces the risk of defects. Here are the key advantages of using laser cladding for Stellite ™ 6:
- Minimal Dilution: The low heat input minimizes dilution of the base material, allowing the desired coating properties to be achieved in a single layer of 0.040-0.060” (1-1.5 mm) thickness. This not only enhances performance but also results in substantial cost savings by reducing the need for multiple layers.
- Enhanced Microstructure: Controlled heat application results in a fine-grained microstructure, leading to increased hardness and improved wear resistance from hardfacing.
- High-Quality Deposits: The low heat input during laser cladding results in high-quality deposits with minimal to zero porosity, ensuring the integrity and longevity of the overlay.
Laser Hardfacing with Stellite™ 6 Material
Properties of Laser Clad Stellite™ 6
- Typical Clad Thickness: 1-2 mm (0.040”-0.080”)
- Hardness: 40-45 HRC
- Dilution: Less than 2%
Summary
In conclusion, the use of laser cladding for Stellite ™ 6 overlays offers distinct advantages over traditional welding methods. With its ability to achieve high-quality, dense deposits with minimal porosity and dilution, laser cladding is the preferred choice for applications requiring superior wear from hardfacing and corrosion resistance. As industries continue to demand more durable and efficient materials, Stellite™ 6 remains at the forefront of innovation, providing reliable solutions for a variety of applications. Investing in laser cladding technology not only enhances product performance but also contributes to significant cost savings, making it an excellent choice for modern manufacturing needs.
Review other applications of Laser Cladding here.