Numerical Investigations on Residual Stress in Laser Penetration Welding Process of Ultrafine-Grained Steel

Table 4

The welding conditions.

Welding parameters	Power (kW)	Speed (mm/s)	Holding force (kN)	Defocusing distance (mm)
1^st condition	5.0	10.0	0.3	3
2^nd condition	5.0	20.0	0.3	3