Fracture Accident Analysis of Drill Pipe Friction Welding Joints

Zhi Gang Huang; Zhi Qiang Shi

doi:10.4028/www.scientific.net/AMR.774-776.1216

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 774-776Fracture Accident Analysis of Drill Pipe Friction...

Fracture Accident Analysis of Drill Pipe Friction Welding Joints

Abstract:

he macro fracture of broken drill pipe friction welded joints and characterizations of microstructure were performed by SEM and XRD, and tested its hardness. The results suggested that the large area of “gray leaf spot” (composition: Fe₃O₄) which is on friction welded joints is the main reason causing the drill pipe brittle fracture. In order to avoid excessive “gray leaf spot” defects during the friction welding, put forward practical recommendations.

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Periodical:

Advanced Materials Research (Volumes 774-776)

Pages:

1216-1220

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.774-776.1216

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Online since:

September 2013

Authors:

Zhi Gang Huang, Zhi Qiang Shi

Keywords:

Brittle Fracture, Drill Pipe, Friction Welding, Gray Leaf Spot

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