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US 12,655,510 B2Granted
Welded member including welded portion with excellent electrodeposition coating corrosion resistance
AssigneePosco
InventorGyu-Yeol Bae
Life of this patent
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Abstract
Provided is a welded member including a welded portion with excellent electrodeposition coating properties and corrosion resistance. The present disclosure may provide a welding member including a gas shielded arc welded portion capable of securing excellent electrodeposition coating properties and corrosion resistance for a welded portion in the automobile industry.
Claims11
A welded member including a welded portion with excellent electrodeposition coating corrosion resistance comprises a base material;
- and a welded portion,
- wherein the welded portion comprises, in wt %, C:
- 0.001 to 0.30%, Si:
- 1.00% or less (excluding 0%), Mn:
- 0.50 to 3.00%, P:
- 0.030% or less (excluding 0%), S:
- 0.030% or less (excluding 0%), Cr:
- 1.50% or less (excluding 0%), Mo:
- 0.60% or less (excluding 0%), Al:
- less than 0.07% (excluding 0%), Ni:
- 0.40% or less (excluding 0%), Ti:
- less than 0.07% (excluding 0%), a balance of Fe and inevitable impurities, and satisfies Relational expression 1 and Relational expression 2, wherein, in a normal welded portion, excluding starting and ending zones of a welding bead corresponding to a length of a smaller value among 25% or 15 mm of a total length of the welding bead, an Si content of slag distributed along the periphery portion of a welding bead is 10% or less in terms of the slag's own weight,
- 3.5
- ≤
- [
- Si
- ]
- ×
- 100
-
- /
- [
- Mn
- ]
- ≤
- 34.
- [
- Relational
-
- Expression
-
- 1
- ]
- where [Si] and [Mn] represent the wt % content of each element in parentheses for the welded portion,
- [
- Ti
- ]
- +
- [
- Al
- ]
- ≤
- 0.07
- [
- Relational
-
- Expression
-
- 2
- ]
- where [Ti] and [Al] represent the wt % content of each element in parentheses for the welded portion.
48 more elements
Dependencies are inferred from the claim text.