Consumable Guide Electroslag Welding of 4 to 24 Inch Thick Carbon Steel Castings (The National Shipbuilding Research Program)
NEWPORT NEWS SHIPBUILDING VA
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This paper presents the results of an SP-7 Welding Panel research and development project recently completed by Newport News Shipbuilding. The focus of this project was directed toward the development, testing and qualification of consumable guide Slectroslag Welding of carbon steel castings from 4 to 24 inches in thickness. Consumable guide Electroslag Welding is a high deposition rate welding process that is ideally suited for use on thick members. This process has increased resistance to hot cracking, porosity, and underhead cracking, and results in minimal angular distortion. Joint preparation and fitup requirements are simplified and result in high quality weld deposits. The project consisted of cast carbon steel MIL-S-l5083 Grade B weldments ranging from 4 to 24 inches thick. Nondestructive testing included magnetic particle and radiographic inspection. Destructive testing included tensiles, Charpy V-notch impacts, and side bends. It is concluded that the use of consumable quide Electroslag Welding is an efficient process for joining thick carbon steel castings when postweld heat treatment can be used to achieve acceptable mechanical properties. Deposition rates of up to 85 lbshr can be achieved.
- Couplers, Fasteners and Joints
- Marine Engineering