We use various joining methods in manufacturing components and larger entities. Joining techniques are used for the manufacture of HIP components, for example, when the preforms are welded together to form the finished product.
They can also be used for joining HIP components with cast or machined parts, and the joining of various metals.
Improved corrosion tolerance and fatigue resistance characteristics can be achieved with NG TIG welding, which is also very economical. It allows for a small number of welding runs and a low overall temperature input as well as produces a good residual stress profile in the HAZ.
The specially designed narrow welding head accommodates the use of a four-cornered weld groove. The cross-section image given here illustrates the narrow welding groove compared to a traditional weld. The narrow groove can be used with a wall thickness of 10 mm and upwards.
Benefits of decreasing the number of welds:
• Quicker overall production
• Smaller heat input
• Less faults in the weld
• Lower consumption of filling material
• Lower consumption of protective gas
• Decreased residual stress
• Easy mechanisation of welding
Achieving these benefits requires the following:
• Advanced welding equipment
• Careful preparation of the welded components (e.g. groove geometry)
• Using a more expensive protective gas