Page 111 - SSAB Welding Handbook Edition 2

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Welding handbook 19.0 Stud arc welding

19.0 Stud arc welding
©SSAB

Stud arc welding includes several methods where a stud 19.1 Stud arc welding methods
is welded to a steel structure. These techniques offer
benefits that include a good bond with favorable There are different types of stud arc welding methods.
mechanical properties. The cost efficiency is also The type of metal, the plate thickness and the size of
advantageous since stud arc welding can be executed the stud all influence the choice of welding technique.
with high productivity. The complete range of plate thicknesses of the
Hardox and Strenx grades are primarily suited for
the arc welding processes:
Essential issues that contribute to these conditions
are that: 4 Drawn arc stud welding with ceramic ferrule.
4 The mechanical properties of the plate surface on 4 Drawn arc stud welding with shielding gas.
the opposite side of the stud weld are unaffected. 4 Short cycle drawn arc welding, which is often
This is because the extension of the HAZ from referred to as short cycle welding. This technique
the welding performance is small and is less than can be performed with or without shielding gas.
the thickness of the plate. This can increase the The actual arc time can be even lower compared
resistance to wear, such as abrasive wear, which is to the already mentioned drawn arc stud welding
illustrated in fig. 19.1. methods.

The basic equipment for these three welding
processes include a control unit, a D.C. power
source, a welding gun, electrical cables and devices
for the use of shielding gas, when applicable. In
modern equipment, the control unit and the power
source are integrated, according to fig. 19.2.
Hardox

Transformer/rectifier
power/control unit
Fig. 19.1: Hardox plate with a stud weld and a bolt connection
subjected to abrasive wear. Welding gun

4 Drilling and tapping of holes in the plate is
avoided. Control cable
4 The distortions in the structure due to stud
welding are very low.
4 The welding time per stud is very short. Often,
many studs can be welded per minute. Ground cable and clamp
4 Stud arc welding is relatively easy to perform. This Fig. 19.2: Stud arc welding equipment for welding with a ferrule. If
means that limited training is needed for the operator. shielding gas is applied additional equipment is required.

This handbook contains general suggestions and information without any expressed or implied warranty of any kind. SSAB hereby expressly disclaims
all liability of any kind, including any damages, in connection with the use of the information and for their suitability for individual applications. 111
It is the responsibility of the user of this brochure to adapt the recommendations contained therein to the requirements of individual applications.