溶接可能塗装鋼板の溶接性, 加工密着性におよぼす塗膜中の添加金属粉末の種類と含有量の影響

概要

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The effects of type, size and content of metal powders contained in the paint film on weldability, formability and corrosion performances of weldable prepainted steel sheets have been investigated. Weldability is influenced by all of type, size and content of metal powders in the paint film. Weldability becomes better, as the size of metal powders becomes smaller and/or their content in the paint film becomes larger. The most significant effect is that the addition of hard metal powders such as steel and TiC into the paint film improves weldability to a great extent. Formability is only influenced by the content of metal powders in the paint film, resulting much inferior formability with larger content of metal powders in the paint film. Zinc powders contained in the paint film improve corrosion performances. Based upon these results, the paint containing steel, zinc and aluminium powders has been formulated and its weldability and formability performances have been compared with the paint containing only zinc powders, changing the content of metal powders in the paint film. It shows that the paint containing 30% by volume in total of steel, zinc and aluminium powders has both much superior weldability and formability than the paint containing only zinc powders.
1987-12-01