Welding parameters and microstructure of pulse laser welded 316 L stainless steel sheet

Welding parameters of pulse laser weldt 316 L stainlesssteel sheet have been studied,and the mierostructure and mechanicalproperties of weldments have been investigeted.The results show that small current,long pulse duration,high welding speed and high frequency should be used in order to form a good weldments.Examination of the micrographs reveals that mainly cellular or celluar-dendrites are formedin the outer patter of the weld metal and equiaxed dendrites are found at the central portion of weld metal.The ultimate tensile strength of weld-ments is up to 95 per cent of the base metal,and the elongation of weld-ments is up to 85 per cent of the base metal.