Research Progress on Microstructure and Properties of ULCB Weld Metal
The emerged background of ultra-low carbon bainitic(ULCB) weld metal and the main factors on the properties of ULCB weld metal were introduced.ULCB weld metal has good performance,but chemical composition,and the selection of welding method and differences of protecting atmosphere have great effects on the properties of ULCB weld metal.The good performance of ULCB weld metal is maximized,Then the size of inclusions should be controlled and the columnar crystal should be eliminated in order to improve the toughness of weld metal.