一种可用于9Ni钢薄板全位置焊接的低气孔敏感性电焊条
By adding specific elements and components to the core and flux coating, the porosity sensitivity problem during the welding of 9Ni steel thin plates was solved, achieving efficient and stable welding results with good weld formation and excellent low-temperature toughness of the joint.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA SHIPBUILDING INDUSTRY CORPORATION NO725 RESEARCH INSTITUTE
- Filing Date
- 2026-06-12
- Publication Date
- 2026-07-17
AI Technical Summary
Existing nickel-based welding materials have high porosity sensitivity when welding 9Ni steel thin plates, resulting in low flaw detection pass rate, increased welding efficiency and cost. The main reasons are small heat capacity, fast heat dissipation, difficulty in gas escape, low welding current and poor protection effect.
The design combines a core and a coating. Ti and rare earth Ce are added to the core for deoxidation, while Al, Mg and rare earth components are added to the coating. Gases are released through carbonates and fluorides at different decomposition temperatures, forming a stable gas shield. Combined with manganese monoxide and fluorides, porosity sensitivity is reduced.
It improves all-position welding controllability, reduces porosity sensitivity, enhances arc stability and weld formation, strengthens the deposited metal, and achieves a joint low-temperature toughness of over 90J with good matching performance.
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Abstract
Citation Information
Patent Citations
LNG structure as well as nickel-based welding rod for marine 9Ni steel welding, and preparation method thereof
CN107214434A