Laser Welding of High-Strength CP Steels: Dissimilar Welds

Jan Kašpar; Stanislav Němeček

doi:10.4028/www.scientific.net/KEM.647.141

Paper Titles

Utilization of Light Microscopy for the Evaluation of Fracture Toughness of Cemented Carbides
p.108

Corrosion Resistance of Inconel 625 and Austenitic Steel M41 after Laser Claddings
p.115

Microstructure of Cr₂N-11Ag Nanocomposite Thin Film Deposited on Vanadis 6 Tool Steel
p.121

Structure Analyses of Experimental Welds Designed for Repair Welding of VVER 1000 Presssure Vessel
p.131

Laser Welding of High-Strength CP Steels: Dissimilar Welds
p.141

Heterogeneous Welded Joints (T23-T92; 15CH1M1F-P91)
p.147

Influence of Microstructural Changes in Creep Resistant Steel after Long-Term Creep Tests on the Shape of the Polarization Curves
p.153

Material Degradation of Steam Pipe Elbow after Long-Term Exposure
p.162

Metallographic Evaluation of Surface Integrity
p.173

HomeKey Engineering MaterialsKey Engineering Materials Vol. 647Laser Welding of High-Strength CP Steels:...

Laser Welding of High-Strength CP Steels: Dissimilar Welds

Abstract:

The paper explores laser welding of high-strength CP-W^® 800 steel and forged steel. Dissimilar welds were produced with different welding parameters. Two welding beam diameters were used. The microstructure and mechanical properties of the resulting welds were examined. Metallographic sections were prepared and microhardness and tension tests were carried out. Fatigue tests were conducted on the weld specimens to map the effects of welding parameters on the fatigue behaviour of the dissimilar weld between the CP steel and the forged steel. Greater amount of heat input impairs the strength of the joint but improves its resistance to initiation of fatigue cracks.