Argon-rich carbon dioxide arc welding method

The invention discloses an argon-rich carbon dioxide arc welding method. The method comprises the following steps of: 1) machining a welded joint groove of a welded member; 2) determining the proportion of an shielding gas; 3) welding according to a welding process standard, and the welding process requirement includes: a) the shielding gas is a mixed gas of argon and carbon dioxide, wherein the volume percentage is as follows: under the normal temperature, Ar (argon) is 79%-80%, and CO2 (carbon dioxide) is 21%-20%; b) ensuring that the droplet transfer in the welding process is the spray transfer. The technical scheme has the following effects that the mechanical property of the welded joint is improved; the fusion zone performance is further improved; and the melting efficiency is improved, so that the impurity and the gas can overflow conveniently.