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US 2025/0060054 A1Published application
Austenitic welded steel tube having wear resistance and manufacturing method for same
AssigneePosco
InventorSang-Chul LEE
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Abstract
According to aspects of the present invention, provided are a welded steel tube and a manufacturing method for the same which can provide excellent wear resistance and also minimize hot cracking of the welded portion, so a lifespan thereof may be effectively maximized even when applied in harsh wear-resistant environments.
Claims7
A manufacturing method for an austenitic welded steel tube, the method comprising:
- forming an austenitic steel sheet into a tubular shape to form a butted portion;
- and
- providing a welded steel tube by welding the butted portion with a heat input of 4.3 kJ/mm or less.
An austenitic welded steel tube, comprising:
- a welded steel tube base material portion in which austenite is a base structure;
- and
- a welded portion connecting both ends of the welded steel tube base material portion to each other,
- wherein a maximum crack length of hot cracks formed in the welded portion is 0.5 mm or less.
1 more element
Dependencies are inferred from the claim text.