一、一般情况 CO_2气体保护焊的发展,大约有二十年的历史了。在这期间,经过不断的努力,克服了种种困难,改进了焊接方法,使它的应用得到逐步的推广,特别是最近几年来,在金属制造工业的各个领域中,得到广泛的应用,但是CO_2焊接法的发展是不平衡的,有些企业用得多些,有些企业用得少些;有些国家用得多些,有些国家用得少些。这里只就个别国家(主要是英国)的应用为例说明。一般认为CO_2焊接法存在着三个主 First, the general situation CO 2 gas shielded welding development, about two decades of history. During this period, through continuous efforts, the difficulties were overcome, the welding method was improved and its application was gradually promoted. In particular, it has been widely used in various fields of the metal manufacturing industry in recent years, but CO_2 The development of the welding method is unbalanced, some enterprises use more, some employ less; some countries use more, some use less. Here only the application of individual countries (mainly the United Kingdom) as an example. It is generally believed that there are three main CO 2 welding methods