Diffusion Bonding

Diffusion Bonding: Resistance Heated High Vacuum Treatment Furnace With Integrated Pressing Unit

In terms of furnace technology, these are based on the PVA brazing furnaces and are also fitted with a hydraulic pressing unit. Depending on the system size, pressing forces of up to 600 metric tons can be applied to the components to be bonded. A special multi-stamp system made from high-strength materials with good thermal stability ensures that forces are distributed homogeneously, even in the case of large components with mating surfaces in excess of 1 m². High-precision measurement sensors guarantee reproducible bonding conditions, thereby enabling this technology to be used in series production processes as well.

For more information click here

Vacuum Furnace Technology: Hot Press Furnace

High vacuum heat treatment furnaces with integrated pressing unit and power-regulated resistance heater elements. Used for diffusion bonding and forming processes under high vacuum conditions as well universal use for thermal treatments and processes where particularly demanding requirements and sophisticated materials are involved.

Applications: Hot Press

• Diffusion bonding
• Product fixing by means of pressing force
• The exertion of a homogeneous pressing force for optimum vacuum brazing processes

Special Features

• Maximum operating temperature up to 1,400°C
• Stepless, process optimized heating power control via the thyristor controller
• Easy and reliable working cycles control
• Clearly structured design of the total furnace with high flexibility levels resulting from modular extensions and innovative system control
• Working pressure range 1 x 10-6 mbar
• Automatic heat treatment process control
• Temperature homogeneity in the operations chamber ≤ ± 5 K
• Pressing force up to 2,500 kN
• Application of the pressing unit up to a maximum temperature of 1,200°C
• Take-up path precision ≤ 0.1mm
• Tandemversion with two integrated and undependant pressing systems

Benifits for Users:

• Excellent thermal characteristics and utilization of energy in combination with a low leakage rate of ≤ 1 x 10-4 mbar l/s
• Uniform and reproducible process progressions
• High level efficiency rates from low loss of energy supply and fit for purpose design of the system
• Short evacuation and cycle times
• Reliability, long life span and convenience results in high economy levels
• Universal application in thermal treatment processes where the requirements are particularly demanding
• Process and menu guidance via PC with data recording and storage

System design

MOV-HP systems for diffusion bonding are cold-wall furnaces with an integrated pressing unit. The vessel is made of stainless steel, double walled and water cooled. Materials are heated in a resistance heated chamber whereby the heat transfer takes place directly via heat radiation from the heater to the thermal treatment product. The installation of pressing plates and punch can be effected both metallically and with graphite. Thermal insulation is provided by metal sheets and multi-layer foils.