We perform hardfacing of wearing surfaces, cutting surfaces, friction surfaces, etc.
Some examples are:
- Extruder screws, coated with stellite material.
- Conveyor screws, coated with Cr/Ni tungsten carbide.
- Cutting tools for the steel industry, coated with Cr/Ni/W.
- Press tools, coated with hard bronze (Ampco).
- Mixer impellers/press screws for the paper industry etc.
Powder welding involves heating up the work piece at the same time as dosing metal powder into the flame, which then melts and solders tight to the parent material.
Used for a number of purposes, including repairing cracks in cast iron. Also used to harden surfaces to prevent wear.
By special welding we mean welding of steels which do not belong to the group known as structural steel. We have become specialised in steels in the tool steel, quenched and tempered steels, duplex material, stainless steels, cobalt alloys and cast iron groups.
We also carry out welding work on various non-ferrous alloys, such as aluminium, aluminium alloys and copper alloys, such as e.g. aluminium bronze and manganese bronze.
Over recent years, plasma hardfacing with powder has been used increasingly within manufacturing in cases where high-quality hardfacing is required, e.g. on valves, turbine parts, plastic extruder screws, etc. A pilot arc inside the burner lights the plasma arc, which is then transferred to the work piece. Feedstock in powder form is sprayed into the plasma, and a homogenous high-quality weld is obtained, with very low fusion of the base material.
The greatest advantage of this method is the very low fusion between the parent material and the weld metal. Thin surface welds (≥ 1.5 mm) can be deposited, giving a high-quality result. The surface weld will also be very smooth, which means little finishing is required. Because the energy in the plasma arc has been concentrated, the work piece is not heated to the same levels as on conventional hardfacing.