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本文通过焊芯过渡Ｔｉ－Ｂ元素，研究了６８６～７８４ＭＰａ好电焊条熔敷金属韧化问题，阐述了在Ｔｉ－Ｂ系条件下，合金元素、炼钢方式等因素对熔敷金属冲击韧性的影响，指出熔敷金属冲击韧性与焊芯中合金元素的含量有依赖关系，而起决定作用的因素是微量元素Ｔｉ和Ｂ
In this paper, the welding toughening of the electrode with 686 ~ 784MPa welding electrode was studied by Ti-B element transition, and the effects of alloying elements and steel-making methods on the toughness of the deposited metal under Ti-B condition It is pointed out that the impact toughness of the deposited metal is dependent on the content of alloying elements in the weld core. The decisive factors are the trace elements Ti and B