Charge rack for high-temperature applications

Overview
Riveted charge racks manufactured from refractory metals retain dimensional stability under high temperature and high-vacuum conditions. Compared with graphite carriers, metallic charge carriers provide greater strength and higher purity. We select suitable alloys such as ML or TZM according to mechanical and process requirements and supply product-specific, engineered designs.

Your advantages

• Optimized design by simulation and calculation
• Tailored solutions to application and process
• Dimensional stability at elevated temperatures
• High creep resistance and improved high-temperature performance

Typical components and product types

• Rails, pins and caps
• Insertable, screw-fastened or riveted racks
• Stackable carriers with fixed or variable spacing
• Base plates and boats for continuous furnaces
• Intermediate plates and frames

Coatings and surface options
Ceramic coatings and other surface treatments are available to reduce adhesion, facilitate cleaning and minimize process residues.

Design & production
We develop optimized designs using simulations and calculations, then select and process alloys to meet required mechanical properties. Production methods and heat treatments are chosen to improve ductility, recrystallization temperature and creep resistance of molybdenum-based alloys.

Materials: ML and TZM

• ML (molybdenum doped with La2O3): stabilized microstructure, higher recrystallization temperature, elongated grain structure for improved ductility and creep resistance; remains ductile after high-temperature exposure
• TZM (Mo alloyed with Ti and Zr): Mo–Ti solid solution and Ti–Zr carbides provide enhanced creep resistance, higher recrystallization temperature and greater high-temperature stability (suitable strength for applications up to approx. 1400°C)

Service & support
We supply complete hot zones or spare parts, offer on-site installation and provide inspection, maintenance and optimization of existing furnaces. Remote support is available for rapid troubleshooting to reduce downtime.

Applications
Used in annealing and brazing furnaces, coating systems, 3D printing sintering equipment, MIM and sintering furnaces, HIP processes and single-crystal growth where high temperatures and vacuum are required.

Technical characteristics / specifications

• Primary materials: ML (La2O3-stabilized Mo), TZM (Mo–Ti–Zr), molybdenum (Mo), tungsten (W), tantalum (Ta), niobium (Nb)
• Available types: insertable, screw-fastened or riveted racks; stackable carriers; base plates and boats
• High creep resistance and elevated recrystallization temperatures for selected alloys
• Ceramic coating option to prevent adherence and reduce residues
• Design by simulation and calculation; tailored manufacturing to customer specifications
• On-site installation, inspection, maintenance and remote service available