Problems of HLAW Hybrid Welding of S1300QL Steel

Abstract

This paper presents the results of tests on the fabrication of welded joints in S1300QL steel according to the requirements of ISO 15614-14 and ISO 12932. The butt-welded joint without bevel was made from 350 × 150 × 8 mm sheets. The welding process was carried out at the hybrid welding (laser–MAG) station. MAG means metal active gas. The test welded joints were subjected to non-destructive and destructive testing. Visual and radiographic examinations were carried out. The distribution of HV10 hardness was determined in the weld, the heat-affected zone, and the base material. The microstructure of these areas was also analysed for the presence of hard and brittle hardening products and non-metallic inclusions. Tensile strength and yield strength, as well as bending strength, were assessed in the mechanical property tests. The impact test was performed in accordance with ISO 9016.

Fiber Laser Welded Cobalt Super Alloy L605: Optimization of Weldability Characteristics

“…The ductile failure of welded joints was observed at higher welding speed whereas brittle failure occurred at low welding speed. Similarly, many kinds of literature describe the effects of input parameters of the laser welding process on the weld quality parameters of different materials such as the microstructure and grain orientation [ 11 , 12 , 13 , 14 ], bead profile [ 15 ], mechanical properties [ 16 , 17 , 18 ], metallurgical properties [ 19 ], corrosion resistance [ 20 ] and residual stresses [ 21 ].…”

Development of the automatic method of detection and grouping of external welding imperfections

“…There are a few methods of non-destructive testing (NDT) to determine quality of welded joints: magnetic particles testing (MT) [6,7], liquid penetrant testing (PT) [8,9], radiographic testing (RT) [10,11], ultrasound testing (UT) [12,13] and others techniques [14][15][16]. The fundamental technique is however visual testing (VT).…”