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论述了焊接在我国铁路钢桥发展中的重要作用、桥梁铜焊接材料的发展概况以及焊缝的强韧化机理，提出应进一步加强我国桥梁钢焊接材料的研究。
The important role of welding in the development of railway steel bridge in our country, the development of bridge copper welding material and the strengthening and toughening mechanism of welding seam are discussed. The research on the steel welding material of bridge in our country should be further strengthened.