Welded metal and titanium dioxide flux-cored wire
A technology for welding metal, titanium dioxide
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[0032] Hereinafter, the present invention will be specifically described with reference to the drawings. First, the reasons for adding components and limiting the composition of the weld metal of the present invention will be described.
[0033] "B: 0.005% by mass or less (excluding 0)"
[0034] P is added as an element that improves the toughness of the weld metal part, but if the content of B exceeds 0.005% by mass, the high temperature crack resistance will be poor, so it is preferably 0.005% by mass or less.
[0035] "N: 0.0045 to 0.02% by mass"
[0036] N is an element that ensures the strength of the weld metal portion. In addition, N cures B as BN, thereby having an effect of improving high-temperature crack susceptibility. However, these effects are insufficient when N is less than 0.0045% by mass. On the other hand, if the N content exceeds 0.02% by mass, the toughness of the weld metal part will be significantly reduced. Therefore, N is preferably 0.0045 to 0.02...
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