| 摘要 |
PURPOSE: To improve the welding workability and to reduce the cost by using a mixture gas of a specific component composition as the shield gas, and arc- welding a primer coated steel plate. CONSTITUTION: For example, a flux cored wire of YEW-C50DR of 1.2mm wire diameter is used, a mixture gas contg. 10 to 30vol% argon in gaseous carbon dioxide is used as the shield gas, and a primer coated steel plate is arc-welded. The primer coated steel plate is coated with four kinds of primers of an inorganic zinc primer, a wash primer, a nonzinc primer and a zinc rich primer respectively by 20 to 30μm each film thickness. In such a way, the performance of pit or blow-hole resistance, etc., can be improved while keeping the excellent welding workability and the mechanical performance not causing trouble practically.
|
