* Redesign the part with joints that can withstand more heat, such as substituting a
lap weld for a butt joint.
Lap weld. Square edges aren't of great importance if it's either a full- or partial-penetration application, but air gaps between the workpieces will severely limit both penetration and welding speeds.
Realizing these tolerances created additional process problems, delays, and their associated costs, Calsonic took a serious second look at standard converter design and eventually settled on a
lap weld with controlled penetration as being the most appropriate to their requirements.
In the early 1960s, basic oxygen process for steel manufacture was in place and the Bessemer process, furnace butt weld and
lap weld pipe were discontinued.
The requirements of this application require
lap welds which are ideally suited to laser welding.
Formation Mechanism of Typical Onion Ring Structures and Void Defects in Friction Stir
Lap Welded Dissimilar Aluminum Alloys.
Pipeline operators use guidance published in PHMSA's TTO5--Low Frequency ERW and
Lap Welded Longitudinal Seam Evaluation--to model the effect of pressure cycle-induced fatigue on the growth of crack flaws to determine the optimum integrity re-assessment date prior to their growth to a critical level.
The force at break of the
lap welds was assessed on an Instron Model 4206 Universal testing machine at a cross-head speed of 5 mm/min.
Lap welds melt a lot of metal to produce a small connection, but they have a much larger tolerance on position than butt welds (Pascu et al., 2009, a).