ABSTRACT
The mechanical properties of weld metal are strongly dependent on their microstructures. (Du et al. 1999) proposed that there were several different microstructures during solidification and cooling of the weld metal of low-carbon steel, including grain boundary ferrite, side plate ferrite, acicular ferrite, pearlite, granular bainite, martensite. The microstructures of weld metal are directly determined by the weld chemical composition of weld metal and the welding parameters.
