在「焊接」1957年第6期中郭世康先生的“在碳酸气中焊接碳鋼”一文,对在二氧化碳(以下简称CO_2)中焊接碳鋼的问题作了全面的叙述。本文主要是把目前国外各文献中关于在CO_2中焊接的气孔问题进行综述。气孔是在用普通低碳鋼焊丝焊沸腾鋼时所碰到的主要问题。焊缝产生气孔的原因很多,可能是氢的缘故, In “Welding” No. 6 of 1957, Mr. Guo Shikang’s article “Welding Carbon Steel in Carbon Dioxide” provided a comprehensive description of the problem of welding carbon steel in carbon dioxide (hereinafter referred to as CO 2). This paper mainly summarizes the current domestic and foreign literature on the issue of stomatal welding in CO_2. Stomata are the main problems encountered when using ordinary mild steel wire to weld boiling steel. Welds produce stomatal many reasons, it may be the reason of hydrogen,